WO2015152221A1 - 歯科材料用重合性モノマー - Google Patents
歯科材料用重合性モノマー Download PDFInfo
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- WO2015152221A1 WO2015152221A1 PCT/JP2015/060084 JP2015060084W WO2015152221A1 WO 2015152221 A1 WO2015152221 A1 WO 2015152221A1 JP 2015060084 W JP2015060084 W JP 2015060084W WO 2015152221 A1 WO2015152221 A1 WO 2015152221A1
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- polymerizable monomer
- dental material
- dental
- composition
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- AMUFQKFLBRIFTF-UHFFFAOYSA-N C=CC(OCCCCOC(NCc1cc(CNC(OCCCCOC(C=C)=O)=O)ccc1)=O)=O Chemical compound C=CC(OCCCCOC(NCc1cc(CNC(OCCCCOC(C=C)=O)=O)ccc1)=O)=O AMUFQKFLBRIFTF-UHFFFAOYSA-N 0.000 description 1
- LLAFMVPBCRROAK-UHFFFAOYSA-N CC(COC(C(C)=C)=O)OC(NCc1cc(CNC(OCCCCOC(C)=O)=O)ccc1)=O Chemical compound CC(COC(C(C)=C)=O)OC(NCc1cc(CNC(OCCCCOC(C)=O)=O)ccc1)=O LLAFMVPBCRROAK-UHFFFAOYSA-N 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/79—Initiators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/71—Fillers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- A61K6/889—Polycarboxylate cements; Glass ionomer cements
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
- C07C271/08—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
- C07C271/10—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C271/20—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by nitrogen atoms not being part of nitro or nitroso groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2602/00—Systems containing two condensed rings
- C07C2602/36—Systems containing two condensed rings the rings having more than two atoms in common
- C07C2602/42—Systems containing two condensed rings the rings having more than two atoms in common the bicyclo ring system containing seven carbon atoms
Definitions
- the present invention relates to a novel polymerizable monomer for dental material, a polymerizable monomer composition for dental material containing the polymerizable monomer, a composition for dental material containing the polymerizable monomer composition for dental material, and the dental
- the present invention relates to a cured product obtained by curing a material composition.
- a composite resin which is a typical example of a composition for dental materials, typically contains a polymerizable monomer composition containing a polymerizable monomer, a filler, a polymerization initiator, a polymerization inhibitor, a dye, and the like. Looking at the ratio of the weight of each component in the composite resin, the weight of the filler is usually the largest, followed by the weight of the polymerizable monomer composition, and these two components account for the majority of the weight of the composite resin.
- the polymerizable monomer composition acts as a binder for the filler, and the physical properties of the monomer and the cured product thereof greatly affect the physical properties and performance of the composite resin containing the same and the cured product thereof.
- a radical polymerizable polyfunctional methacrylate composition is used in many cases from the viewpoints of in vivo safety of the monomer and mechanical strength and abrasion resistance of the cured product. It has been.
- Typical examples of polyfunctional methacrylate compositions include 2,2-bis [4- (3-methacryloyloxy-2-hydroxypropoxy) phenyl] propane (hereinafter referred to as Bis-GMA) and 2,2,4-trimethyl.
- Hexamethylenebis (2-carbamoyloxyethyl) dimethacrylate (hereinafter referred to as UDMA) is a main component, and triethylene glycol dimethacrylate (hereinafter referred to as TEGDMA) is blended to adjust the viscosity.
- UDMA Hexamethylenebis (2-carbamoyloxyethyl) dimethacrylate
- TEGDMA triethylene glycol dimethacrylate
- Patent Document 1 Attempts to improve the mechanical strength of cured composite resins using Bis-GMA, which is widely used as the main component of the polymerizable monomer composition, and monomers replacing UDMA have already been reported.
- Patent Document 1 and Patent Document 2 Attempts to improve the mechanical strength of cured composite resins using Bis-GMA, which is widely used as the main component of the polymerizable monomer composition, and monomers replacing UDMA have already been reported.
- Examples of attempts to improve the main component monomer include improvement of the main component monomer for the purpose of improving the refractive index of the cured product of the polymerizable monomer composition (Patent Document 3), and before and after curing of the polymerizable monomer composition. And improvement of the main component monomer for the purpose of improving the polymerization shrinkage ratio (Patent Document 4).
- JP 2000-240669 A Special table 2013-544823 Japanese Patent Laid-Open No. 11-315059 WO2012-157567
- the present invention provides a polymerizable monomer for dental material that gives a cured product having physical properties satisfying both high toughness and rigidity, a polymerizable monomer composition for dental material containing the polymerizable monomer, and the dental It aims at providing the composition for dental materials containing the polymerizable monomer composition for materials, and its hardened
- the present inventor has a high mechanical property of a cured product of a polymerizable monomer composition containing a polymerizable monomer containing a diisocyanate having an appropriate rigidity and a urethane acrylate obtained from a hydroxyacrylate having an appropriate flexibility. As a result of further intensive studies, the present invention was completed.
- the present invention includes a polymerizable monomer for dental material, a polymerizable monomer composition for dental material containing the polymerizable monomer, and the polymerizable monomer composition as described in [1] to [8] below.
- the dental material composition and a cured product of the dental material composition are provided.
- a polymerizable monomer for dental material (A) comprising a urethane acrylate having at least one acryloyl group represented by the following general formula (1).
- R a has a divalent aromatic hydrocarbon group having 6 to 9 carbon atoms or a divalent bridged cyclic hydrocarbon group having 6 to 9 carbon atoms in the center, and A group bonded to a nitrogen atom of an adjacent carbamoyl group via an unsubstituted methylene group, wherein R b and R c are each independently an alkyl group having 1 to 3 carbon atoms or (meth) acryloyloxy A straight-chain alkylene group having 2 to 6 carbon atoms which may be substituted with a methylene group, or a straight-chain oxyalkylene group, and R d represents a hydrogen atom or a methyl group.
- R b and R c in the general formula (1) are each independently a linear alkylene group having 2 to 6 carbon atoms in which a hydrogen atom may be substituted with an alkyl group having 1 to 3 carbon atoms Or a polymerizable monomer (A) for dental materials according to any one of [1] to [4], which is a linear oxyalkylene group.
- a polymerizable monomer composition for dental material comprising the polymerizable monomer for dental material (A) according to any one of [1] to [5].
- a dental material composition comprising the dental monomer polymerizable monomer composition according to [6] or [7], a polymerization initiator, and a filler.
- the polymerizable monomer composition for dental material containing the polymerizable monomer for dental material of the present invention achieves both high rigidity and toughness when cured. Moreover, since it has a moderate viscosity, it is excellent in the mixability of the polymerizable monomer composition for dental materials and a filler, and is useful for the composition for dental materials containing a filler etc.
- composition for dental material using the polymerizable monomer composition for dental material of the present invention has high mechanical properties of the cured product, and is particularly suitable as, for example, a composite resin for crown restoration and an artificial tooth material. .
- the polymerizable monomer (A) for dental material in the present invention comprises a urethane acrylate having at least one acryloyl group represented by the following general formula (1).
- R b and R c each independently represent a hydrogen atom having 2 to 6 carbon atoms in which a hydrogen atom may be substituted with an alkyl group having 1 to 3 carbon atoms or a (meth) acryloyloxymethylene group.
- a hydrogen atom may be substituted with an alkyl group having 1 to 3 carbon atoms, a linear alkylene group having 2 to 4 carbon atoms or a straight chain It is an oxyalkylene group.
- linear alkylene group examples include —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 CH 2 —, And —CH 2 CH 2 CH 2 CH 2 CH 2 CH 2 — and the like.
- a preferred embodiment of these linear alkylene groups is, for example, —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 — and the like.
- linear oxyalkylene group examples include —CH 2 CH 2 OCH 2 CH 2 — and —CH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2 —.
- a preferred embodiment of the linear oxyalkylene group is, for example, —CH 2 CH 2 OCH 2 CH 2 —.
- the carbon number of the linear alkylene group or linear oxyalkylene group is usually 2 to 6, preferably 2 from the viewpoint of giving the dental material polymerizable monomer (A) appropriate flexibility. ⁇ 4, more preferably 2.
- Examples of the hydrogen atom and substitutable alkyl group contained in the linear alkylene group or linear oxyalkylene group include CH 3 —, CH 3 CH 2 —, CH 3 CH 2 CH 2 —, and (CH 3 ) 2. CH- and the like can be mentioned. From the viewpoint of providing the dental monomer polymerizable monomer (A) with appropriate flexibility, the alkyl group preferably has 1 to 3, more preferably 1 to 2, and even more preferably 1 carbon atoms.
- Examples of the (meth) acryloyloxymethylene group that can be substituted with a hydrogen atom contained in the linear alkylene group or linear oxyalkylene group include a methacryloyloxymethylene group and an acryloyloxymethylene group.
- a urethane acrylate represented by the following general formula (1 ') is a preferred embodiment from the viewpoint of more effectively achieving the effects of the present application.
- the dental monomer polymerizable monomer (A) represented by the general formula (1) has at least one acryloyl group at the terminal position.
- the urethane acrylate represented by the general formula (1 ') which is a preferred embodiment of the polymerizable monomer (A) for dental materials, has at least two acryloyl groups at both terminal positions.
- the polymerizable group contained in the polymerizable monomer for dental material (A) is an acryloyl group and a methacryloyl group. Become both of the group.
- the polymerizable monomer for dental material (A) contains 3 or more polymerizable groups
- the polymerizable group contains fewer methacryloyl groups and more acryloyl groups.
- R b and R C are hydrogen bonded to the carbon adjacent to the carbon of the linear alkylene group or linear oxyalkylene group adjacent to the acryloyl groups at both ends contained in the polymerizable monomer for dental material (A). Is preferably substituted.
- the linear alkylene group is —CH 2 CH 2 —
- the compound group represented by the general formula (5) is preferable.
- the number of alkyl groups that can be substituted with hydrogen atoms and the number of (meth) acryloyloxymethylene groups that can be substituted with hydrogen atoms is not particularly limited, but is preferably 0 to 8, and suitable for the polymerizable monomer (A) for dental materials. From the viewpoint of imparting flexibility, 0 to 4 is more preferable, 0 to 2 is more preferable, and 0, that is, the absence of the substituent is particularly preferable.
- R a is a group bonded to the nitrogen atoms of two adjacent carbamoyl groups, and is a divalent aromatic hydrocarbon group or a divalent bridged cyclic carbonization. This is a group having a hydrogen group in the center and two unsubstituted methylene groups (hereinafter also referred to as methylene group A) bonded to the nitrogen atom of the carbamoyl group and the divalent group.
- the carbon number of the divalent aromatic hydrocarbon group or divalent bridged cyclic hydrocarbon group contained in Ra is usually 6 to 9, preferably 6 to 7. is there.
- the aromatic hydrocarbon group or bridged cyclic hydrocarbon group having 6 to 7 carbon atoms include a phenylene group and a bicyclo [2.2.1] heptylene group. Among these, a bicyclo [2.2.1] heptylene group is preferable from the viewpoint of toughness of the cured product.
- the positional relationship between the two methylene groups A with respect to the benzene ring contained in the aromatic hydrocarbon group is ortho Any of the position, the meta position, and the para position may be used. However, in order to achieve the effect of the present invention, the positional relationship between these two methylene groups A is preferably the meta position or the para position, and more preferably the meta position.
- the positions of the two methylene groups A with respect to the carbocycle contained in the bridged cyclic hydrocarbon group The relationship is not particularly limited. However, in order to achieve the effect of the present invention, these two methylene groups A are preferably not bonded to the same carbon atom of the carbocycle, and the carbocyclic group to which one of the methylene groups A is bonded. More preferably, the other methylene group A is bonded to carbocyclic carbon that is two or more away from carbon.
- positional isomers having different positions of the two methylene groups A may be used singly or may be used as a mixture of two or more.
- Ra is preferably a group selected from the groups represented by the following general formulas (2) and (3).
- the group of the general formula (2) it may be a group consisting of a mixture of positional isomers different in the bonding position of the methylene group, or may be a group consisting of one isolated positional isomer. .
- a group represented by the general formula (4) is more preferable.
- the group of the general formula (3) it is generally a mixture of positional isomers in which methylene groups are bonded to the 2,5 and 2,6 positions.
- urethane acrylates represented by the following chemical formula are preferable.
- Et represents an ethyl group.
- the molecular weight of the polymerizable monomer (A) for dental material is derived from the structure, but is generally about 400 to 1000, preferably 400 to 700. When the molecular weight is within this range, the monomer viscosity becomes low, which is advantageous when blended into a dental material composition.
- the polymerizable monomer for dental material (A) is preferably liquid at normal temperature.
- the viscosity of the polymerizable monomer for dental material (A) at 65 ° C. is preferably 1 to 50000 mPa ⁇ s, more preferably 1 to 20000 mPa ⁇ s, and further preferably 1 to 5000 mPa ⁇ s. preferable. When the viscosity is within this range, the viscosity of the polymerizable monomer composition for a dental material becomes low, which is advantageous when blended into the dental material composition.
- the said polymerizable monomer for dental materials (A) is a thing other than what was partially oligomerized by the preservation
- the viscosity is a value measured at 65 ° C. using an E-type viscometer (for example, TVE-22H manufactured by Toki Sangyo Co., Ltd.).
- These dental monomers polymerizable monomers (A) may be used singly or in combination of two or more.
- the cured product obtained from this composition has both toughness and rigidity. Material.
- the polymerizable monomer for dental material (A) is derived from the diisocyanate (a2) represented by the general formula (8) described later, A part containing a specific divalent aromatic hydrocarbon group or a divalent bridged cyclic hydrocarbon group and a methylene group (for example, R a in the general formula (1) or (1 ′)) (hereinafter referred to as a core part) Or a portion derived from the alkylene chain of the linear portion of hydroxyacrylate (a1) (for example, R b and R c in general formula (1) or (1 ′) or R d in general formula (6) described later) )) (Hereinafter also referred to as arm portion), a carbamoyl group connecting the core portion and the arm portion, and urethane acrylate composed of at least one acryloyl group (here, at least at both ends) It is a preferred embodiment having a One acryloyl groups).
- the balance between the hard segment and the soft segment in the polymerizable monomer (in the same molecule) needs to be appropriately controlled.
- hexamethylenebis (2-carbamoyloxyethyl) dimethacrylate which is often used in the past
- 2,2,4-trimethyl which is a portion corresponding to the core portion of the present application
- the hexamethylene group is a straight-chain alkylene group having 6 carbon atoms having a methyl group as a substituent, it can be regarded as a soft segment.
- the arm part is ethylene group, this can also be considered as a soft segment. Therefore, except for the carbamoyl group, UDMA does not have a hard segment in the molecule and lacks rigidity as a whole molecule. Therefore, a cured product of a polymerizable monomer composition for dental materials mainly composed of UDMA. Becomes a material lacking rigidity.
- the arm part is an alkylene chain having moderate flexibility, can be regarded as a soft segment, and the core part is a divalent aromatic.
- Aromatic hydrocarbon group typically an aromatic hydrocarbon group having 6 to 9 carbon atoms
- divalent bridged cyclic hydrocarbon group typically a bridged cyclic hydrocarbon group having 6 to 9 carbon atoms
- the polymerizable monomer (A) for dental material has an appropriate rigidity due to an appropriate balance (structural characteristics) between the soft segment and the hard segment. For this reason, it is presumed that a cured product having higher rigidity than UDMA was obtained in terms of the whole molecule.
- the polymerizable monomer for dental materials (A) which is the urethane acrylate of the present invention has an acryloyl group as a polymerizable group.
- the cured product of the methacrylate monomer exhibits a more rigid physical property than the cured product of the acrylate monomer.
- the main chain portion produced by polymerization of the methacryloyl group exhibits a hard segment property
- the main chain portion produced by the polymerization of the acryloyl group exhibits a soft segment property. Therefore, it is presumed that the polymerizable monomer for dental material (A) of the present invention can provide a cured product excellent in toughness as compared with a similar compound having a methacryloyl group.
- the dental monomer polymerizable monomer (A) has a polymerizable group of more than 2, it is estimated that a cured product with excellent toughness can be obtained as the number of methacryloyl groups is small and the number of acryloyl groups is large.
- the dental monomer polymerizable monomer (A) which is a urethane acrylate includes, for example, a hydroxy (meth) acrylate containing a hydroxyacrylate (a1) having an appropriate flexibility represented by the following general formula (6), It can be obtained by reacting with a diisocyanate (a2) having an appropriate rigidity represented by the formula (8).
- R f is a linear alkylene group having 2 to 6 carbon atoms, in which a hydrogen atom may be substituted with an alkyl group having 1 to 3 carbon atoms or a (meth) acryloyloxymethylene group, Or a linear oxyalkylene group is shown.
- R f in the general formula (6) or (6 ′) is a linear alkylene group having 2 to 4 carbon atoms in which a hydrogen atom may be substituted with an alkyl group having 1 to 3 carbon atoms, or It is an oxyalkylene group.
- linear alkylene group examples include —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 CH 2 —, And —CH 2 CH 2 CH 2 CH 2 CH 2 CH 2 — and the like.
- a preferred embodiment of these linear alkylene groups is, for example, —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 — and the like.
- linear oxyalkylene group examples include —CH 2 CH 2 OCH 2 CH 2 — and —CH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2 —.
- a preferred embodiment of the linear oxyalkylene group is, for example, —CH 2 CH 2 OCH 2 CH 2 —.
- the linear alkylene group or linear oxyalkylene group usually has 2 to 6 carbon atoms, preferably 2 to 4 carbon atoms. Preferably it is 2.
- alkyl group that can be substituted for the hydrogen atom contained in the linear alkylene group or linear oxyalkylene group include CH 3 —, CH 3 CH 2 —, CH 3 CH 2 CH 2 —, and (CH 3 ). 2 CH- and the like. From the viewpoint of imparting appropriate flexibility to the polymerizable monomer for dental material (A), the alkyl group preferably has 1 to 3, more preferably 1 to 2, and even more preferably 1.
- Examples of the (meth) acryloyloxymethylene group that can be substituted with a hydrogen atom contained in the linear alkylene group or linear oxyalkylene group include a methacryloyloxymethylene group and an acryloyloxymethylene group.
- the hydroxy acrylate (a1) represented by the general formula (6) has an acryloyl group. Therefore, the polymerizable monomer (A) for dental material necessarily has at least one acryloyl group at the terminal position of the molecule.
- R f has a (meth) acryloyloxymethylene group as a substituent, and the (meth) acryloyloxymethylene group consists only of an acryloyloxymethylene group, any of the polymerizable groups contained in the hydroxy acrylate (a1) becomes an acryloyl group.
- the polymerizable group contained in the hydroxy acrylate (a1) is both an acryloyl group and a methacryloyl group.
- the polymerizable group has fewer methacryloyl groups and more acryloyl groups. It is more preferable that only the acryloyl group is contained as the polymerizable group (the (meth) acryloyloxymethylene group that can serve as a substituent for R d is an acryloyloxy group).
- the substituent in R f is preferably substituted with hydrogen bonded to the carbon adjacent to the carbon of the linear alkylene group or linear oxyalkylene group adjacent to the acryloyl group contained in hydroxyl methacrylate (a1). .
- the linear alkylene group is —CH 2 CH 2 —
- the compound group represented by the general formula (7) is preferable.
- the number of alkyl groups that can be substituted with hydrogen atoms and (meth) acryloyloxymethylene groups that can be substituted with hydrogen atoms is not particularly limited, but is preferably 0 to 4, and suitable for the polymerizable monomer (A) for dental materials. From the viewpoint of imparting flexibility, 0 to 2 is more preferable, 0 to 1 is more preferable, and 0, that is, the absence of the substituent is particularly preferable.
- the hydroxy acrylate (a1) may be used alone or in combination of two or more. Moreover, when making it react with the diisocyanate (a2) mentioned later, you may use the said hydroxyacrylate (a1) as a mixture with a hydroxymethacrylate.
- the diisocyanate (a2) has a structure represented by the following general formula (8).
- R e is a divalent aromatic hydrocarbon group having 6 to 9 carbon atoms or a divalent bridged cyclic hydrocarbon group having 6 to 9 carbon atoms.
- the carbon number of the aromatic hydrocarbon group or the bridged cyclic hydrocarbon group is usually 6 to 9, and preferably 6 to 7.
- the aromatic hydrocarbon group or bridged cyclic hydrocarbon group having 6 to 7 carbon atoms include a phenylene group and a bicyclo [2.2.1] heptylene group. Among these, a bicyclo [2.2.1] heptylene group is preferable from the viewpoint of toughness of the cured product.
- R e is an aromatic hydrocarbon group
- the two methylene groups directly bonded to R e with respect to the benzene ring contained in the aromatic hydrocarbon group are located at the ortho, meta, or para positions. Any of the relationships may be used. However, in order to achieve the effect of the present invention, these two methylene groups are preferably in the meta-position or para-position, and more preferably in the meta-position.
- R e is a bridged cyclic hydrocarbon group
- the positional relationship between the two methylene groups directly bonded to R e with respect to the carbocycle contained in the bridged cyclic hydrocarbon group is not particularly limited.
- the two methylene groups is preferably above is not a positional relation that binds to the same carbon atom of the carbocyclic ring, the one methylene group directly bonded to R e It is more preferable that the other methylene group is bonded to the carbocyclic carbon that is two or more away from the bonded carbocyclic carbon.
- Positions are different positional isomers of two methylene groups bonded directly to these R e may or may be used alone may also be used as a mixture of two or more.
- the specific compound of the diisocyanate (a2) is preferably at least one compound selected from those described in the compounds represented by the following general formulas (9) and (10).
- the compound of the general formula (9) it may be a mixture of positional isomers different in the bonding position of the methylene group, or may be one isolated positional isomer.
- the compound shown by General formula (11) is more preferable.
- the compound of the general formula (10) is called by the name bis (isocyanatomethyl) bicyclo [2.2.1] heptane, but is generally a positional isomer having methylene groups at the 2,5 and 2,6 positions. It is a mixture of
- These diisocyanates (a2) may be used individually by 1 type, and may be used in mixture of 2 or more types.
- the polymerizable monomer for dental material (A) of the present invention can be obtained, for example, by reacting the hydroxy (meth) acrylate containing the hydroxy acrylate (a1) with the diisocyanate (a2) as described above.
- the reaction can be carried out by a known method or a method according to a known method.
- the polymerizable monomer (A) for dental material of the present invention can be obtained by mixing the hydroxy acrylate (a1) and the diisocyanate (a2). At this time, a hydroxyl group in the hydroxy acrylate (a1) and an isocyanate group in the diisocyanate (a2) react to generate a carbamoyl group. Such a reaction is sometimes called a urethanization reaction.
- a catalyst may or may not be added, but it is preferable to add a catalyst in order to improve the reaction rate.
- a catalyst a known catalyst that accelerates the urethanization reaction can be used.
- urethanization catalyst examples include organic tin compounds such as dibutyltin dilaurate, dibutyltin dioctate and tin octoate, copper naphthenate, cobalt naphthenate, zinc naphthenate, acetylacetonatozirconium, acetylacetonatoiron and acetylacetonato.
- organic tin compounds such as dibutyltin dilaurate, dibutyltin dioctate and tin octoate, copper naphthenate, cobalt naphthenate, zinc naphthenate, acetylacetonatozirconium, acetylacetonatoiron and acetylacetonato.
- organometallic compounds other than tin such as germanium, triethylamine, 1,4-diazabicyclo [2.2.2] octane, 2,6,7-trimethyl-1-diazabicyclo [2.2.2] octane, 1, 8-diazabicyclo [5.4.0] undecene, N, N-dimethylcyclohexylamine, pyridine, N-methylmorpholine, N, N, N ′, N′-tetramethylethylenediamine, N, N, N ′, N ′ -Tetramethyl-1,3-butanediamine, N, N, N ' Amine compounds such as N′-pentamethyldiethylenetriamine, N, N, N ′, N′-tetra (3-dimethylaminopropyl) -methanediamine, N, N′-dimethylpiperazine and 1,2-dimethylimidazole and their And trialkylphosphine compounds such as tri-n-but
- dibutyltin dilaurate and tin octoate are preferable because the reaction proceeds in a small amount and the selectivity to the diisocyanate compound is high.
- a urethanization catalyst 0.001 to 0.5% by weight is preferably added to 100% by weight of the total weight of hydroxyacrylate (a1) and diisocyanate (a2), and 0.002 to More preferably, 0.3% by weight is added, more preferably 0.01 to 0.3% by weight, still more preferably 0.01 to 0.2% by weight, More preferably, 0.2 to 0.2% by weight is added.
- the addition amount is less than the above lower limit value, the effect of the catalyst may be reduced, and the reaction time may be remarkably increased. If the addition amount exceeds the above upper limit value, the catalyst effect becomes excessive and a large amount of reaction heat is generated, resulting in a temperature Control can be difficult.
- the entire amount of the catalyst may be added at the start of the reaction, or may be added to the reaction system sequentially or divided as necessary. Such sequential or divided addition of the catalyst suppresses the generation of a large amount of reaction heat at the initial stage of the reaction, and thus makes it easier to control the reaction temperature.
- the reaction temperature is not particularly limited, but is preferably 0 to 120 ° C., more preferably 20 to 100 ° C., and further preferably 40 to 80 ° C.
- the reaction rate When the reaction is carried out at a temperature lower than the lower limit, the reaction rate extremely decreases, so that a very long time is required until the reaction is completed, and in some cases, the reaction may not be completed.
- impurities produced by side reactions may be generated. Such impurities may cause coloring of the manufactured acrylate compound.
- the reaction temperature is preferably controlled from the viewpoint of stable production in the above-mentioned preferable temperature range.
- the urethanization reaction is an exothermic reaction
- cooling may be performed when the exothermic amount is large and the temperature of the reaction product may rise beyond the preferable reaction temperature range.
- heating may be performed when the reaction is almost completed and the temperature of the reaction product may fall beyond the preferable reaction temperature range.
- the polymerizable monomer for dental material (A) has polymerization activity. Therefore, an unintended polymerization reaction may proceed during the production when exposed to a high temperature.
- a known polymerization inhibitor can be added before starting the reaction or during the reaction.
- the polymerization inhibitor is not particularly limited as long as the reaction of the acrylate group can be suppressed when the polymerizable monomer (A) for dental material is produced.
- BHT dibutylhydroxytoluene
- HQ hydroquinone
- MEHQ hydroquinone monomethyl ether
- PTZ phenothiazine
- BHT is less consumed by reacting with isocyanate groups than other phenolic polymerization inhibitors, and is less colored as seen with amine-based polymerization inhibitors.
- the amount of the polymerization inhibitor to be added is not particularly limited, but it is preferable to add 0.001 to 0.5% by weight with respect to 100% by weight of the total weight of hydroxyacrylate (a1) and diisocyanate (a2). It is more preferable to add 0.002 to 0.3% by weight, still more preferably 0.005 to 0.3% by weight, still more preferably 0.005 to 0.1% by weight, More preferably, 0.01 to 0.1% by weight is added.
- the addition amount is lower than the lower limit, the ability as a polymerization inhibitor may not be exhibited, and if the addition amount exceeds the upper limit, the dental material composition that is an application of the polymerizable monomer for dental material (A) is used. When used, the curing rate becomes extremely slow, which may limit practicality.
- a solvent may be used.
- the solvent is not particularly limited as long as it has no practical reactivity to hydroxy acrylate (a1) and diisocyanate (a2), does not inhibit the reaction, and dissolves raw materials and products. Moreover, you may react without using a solvent. Since the hydroxy acrylate (a1) is usually a low-viscosity liquid, it can be mixed with the diisocyanate (a2) and can be reacted without using a solvent.
- the method of mixing the hydroxy acrylate (a1) and the diisocyanate (a2) is not particularly limited.
- a method of adding and mixing the diisocyanate (a2) while controlling the input amount of the diisocyanate (a2) to the hydroxy acrylate (a1) in the reaction vessel, and the hydroxy acrylate (a1) to the diisocyanate (a2) in the reaction vessel Mixing by adding and mixing while controlling the input amount, and adding and mixing hydroxy acrylate (a1) and diisocyanate (a2) to the reaction vessel while simultaneously controlling the input amount Can do.
- the amount of heat generated by the urethanization reaction can be controlled within an appropriate range, so that temperature control during the reaction is facilitated.
- the method of performing a urethanation reaction can also be employ
- Oxygen is effective as a polymerization inhibitor for compounds containing an acryloyl group. Therefore, oxygen may be introduced into the reactor during the reaction in order to prevent unintended polymerization of acryloyl groups.
- Oxygen can be introduced into the reactor in the form of, for example, dry air or oxygen gas, but is preferably introduced into the reactor in the form of dry air. Dry air can be obtained by, for example, drying by a known method including use of a condensing type air dryer and removing water.
- a mixed gas of an inert gas such as nitrogen and oxygen can be introduced into the reactor.
- the aspect of the mixed gas of an inert gas such as nitrogen and oxygen is also preferable as in the case of the dry air.
- a mixed gas of an inert gas such as nitrogen and oxygen can be obtained by mixing nitrogen in a predetermined ratio with the above-described dry air containing oxygen gas or oxygen.
- the nitrogen is preferably dried by a known method to remove water.
- the introduction method is not particularly limited, for example, it can be introduced in the form of bubbles continuously or intermittently from the bottom of the reaction vessel. Moreover, you may introduce
- the introduction amount of the dry air may be appropriately set according to the size of the reaction vessel, for example, when the reaction vessel is 1 L, it is usually 1 to 500 ml / min, preferably 1 to 300 ml / min.
- the amount is less than 1 ml / min, a sufficient amount of oxygen cannot be introduced and may not act as a polymerization inhibitor. If it exceeds 500 ml / min, volatilization of diisocyanate is increased during the reaction, and the polymerizable monomer (A ) May be deteriorated after curing.
- the diisocyanate (a2) and water may react with each other to produce a higher molecular weight impurity than the target product.
- Such an increase in the amount of impurities causes an increase in the viscosity of the product, which is not preferable. Therefore, it is preferable that water is not present in the reaction system as much as possible when the urethanization reaction is performed.
- the amount of water contained in the hydroxy acrylate (a1) is as small as possible.
- the amount of water is preferably 0.5% by weight or less with respect to the hydroxy acrylate (a1). It is more preferably 0.3% by weight or less, and further preferably 0.1% by weight or less.
- the amount of water contained in the hydroxy acrylate (a1) exceeds the above value, it is preferably used as a raw material for the dental monomer polymerizable monomer (A), which is urethane acrylate, after removing water by a known method.
- the inside of the reaction vessel in which the urethanization reaction is performed is preferably dried by a known method to remove water.
- the polymerizable monomer composition for dental material in the present invention contains the polymerizable monomer (A) for dental material, which is the urethane acrylate described above, and further contains other polymerizable compounds.
- the dental material polymerizable monomer (A) may be contained singly or in a mixed state.
- a polymerizable monomer (A) for dental material is produced using two or more kinds of hydroxyacrylate (a1) and diisocyanate (a2) as raw materials, or a mixture of hydroxyacrylate (a1) and hydroxymethacrylate and diisocyanate (a2)
- the polymerizable monomer for dental material (A) is prepared from the raw materials
- the polymerizable monomer composition for dental material contains two or more kinds of polymerizable monomers for dental material (A). .
- polymerizable compounds further include a polymerizable compound (B) containing at least one polymerizable group selected from a methacryloyl group and an acryloyl group (however, different from the polymerizable monomer (A) for dental materials) It is preferable to do.
- B polymerizable compound containing at least one polymerizable group selected from a methacryloyl group and an acryloyl group (however, different from the polymerizable monomer (A) for dental materials) It is preferable to do.
- the number of polymerizable groups contained in the polymerizable compound (B) may be one, or two or more.
- the number of preferred polymerizable groups is 2 or more and 10 or less, the more preferred number of polymerizable groups is 2 or more and 6 or less, and the more preferred number of polymerizable groups is 2 or more and 4 or less.
- These polymerizable compounds (B) may be composed of one kind of compound or a mixture of two or more kinds of compounds.
- the molecular weight of the polymerizable compound (B) is preferably 80 to 1000, and more preferably 150 to 700. If the molecular weight is smaller than this range, the boiling point becomes low, and therefore, the lower limit is preferably set to the above from the viewpoint of operability when preparing the dental material composition. When the molecular weight is larger than this range, the viscosity tends to be high, and the upper limit is preferably set to the above from the viewpoint of operability when preparing the dental material composition.
- the polymerizable compound (B) is preferably liquid at normal temperature. Further, the viscosity of the polymerizable compound (B) at 65 ° C. is preferably 1 to 50000 mPa ⁇ s, more preferably 1 to 20000 mPa ⁇ s, still more preferably 1 to 5000 mPa ⁇ s. It is particularly preferable that the pressure be ⁇ 3000 mPa ⁇ s. When the viscosity is within this range, the viscosity of the polymerizable monomer composition for a dental material becomes low, which is advantageous when blended into the dental material composition. Further, the viscosity of the polymerizable compound (B) at 65 ° C.
- the said polymeric compound (B) may contain subcomponents other than desired polymeric compounds (B), such as what was partially oligomerized by the preservation
- the viscosity is a value measured with an E-type viscometer at 65 ° C.
- Examples of the polymerizable compound (B) having only one polymerizable group include a polymerizable compound represented by the following general formula (12).
- R 1 represents hydrogen or a methyl group
- R 2 represents a monovalent organic group having 1 to 20 carbon atoms which may contain oxygen or nitrogen.
- Examples of the monovalent organic group include carbon atoms such as an acyclic hydrocarbon group having 1 to 20 carbon atoms such as an alkyl group, an alkenyl group, and an alkynyl group, a cycloalkyl group, a cycloalkenyl group, a cycloalkynyl group, and an aryl group.
- Hydrocarbon groups such as cyclic hydrocarbon groups of 1 to 20; oxygen is inserted between at least some carbon-carbon bonds of the above hydrocarbon groups such as alkoxyalkyl groups, alkoxyalkylene glycol groups, and tetrahydrofurfuryl groups.
- an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms such as a group formed (provided that oxygen is not continuously inserted).
- the cyclic hydrocarbon group having 1 to 20 carbon atoms may have an acyclic hydrocarbon portion. Further, the acyclic hydrocarbon moiety contained in these groups may be either linear or branched.
- the hydrocarbon group having 1 to 20 carbon atoms or the oxygen-containing hydrocarbon group having 1 to 20 carbon atoms contains a linear alkylene moiety
- at least one methylene group is an ester bond, an amide
- the bond, carbonate bond, urethane bond (carbamoyl group), or urea bond may be substituted (however, the methylene group is not continuously replaced).
- a hydrogen atom contained in the organic group such as a hydrocarbon group having 1 to 20 carbon atoms or an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms is an acid group such as a carboxyl group or a phosphate group, a hydroxyl group, or an amino group. , May be replaced with a functional group such as an epoxy group.
- Examples of the compound having a methacryloyl group represented by the general formula (12) include methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, hexyl methacrylate, cyclohexyl methacrylate, ethoxydiethylene glycol methacrylate, methoxytriethylene glycol methacrylate, and phenoxyethyl.
- Examples include methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, 4-hydroxybutyl methacrylate, and 1,4-cyclohexanedimethanol monomethacrylate.
- Examples of the compound having an acryloyl group represented by the general formula (12) include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, cyclohexyl acrylate, ethoxydiethylene glycol acrylate, methoxytriethylene glycol acrylate, and phenoxyethyl.
- Examples include acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 4-hydroxybutyl acrylate, and 1,4-cyclohexanedimethanol monoacrylate.
- Examples of the polymerizable compound (B) having two or more polymerizable groups include a polymerizable compound represented by the following general formula (13).
- R 3 and R 4 represent hydrogen or a methyl group, which may be the same or different, and R 5 may contain oxygen or nitrogen and have 2 to 40 carbon atoms.
- a valent organic group the compound represented by the general formula (11) does not include the polymerizable monomer (A) for dental material.
- Examples of the divalent organic group include an acyclic hydrocarbon group having 1 to 40 carbon atoms such as an alkylene group, an alkenylene group and an alkynylene group, a cycloalkylene group, a cycloalkenylene group, a cycloalkynylene group and an arylene group.
- a hydrocarbon group such as a cyclic hydrocarbon group having 1 to 40 carbon atoms; a group in which oxygen is inserted between at least some carbon-carbon bonds of the hydrocarbon group such as an oxyalkylene group (provided that oxygen is continuous) Or an oxygen-containing hydrocarbon group having 1 to 40 carbon atoms.
- the cyclic hydrocarbon group having 1 to 40 carbon atoms may have an acyclic hydrocarbon portion. Further, the acyclic hydrocarbon moiety contained in these groups may be either linear or branched.
- the hydrocarbon group having 1 to 40 carbon atoms or the oxygen-containing hydrocarbon group having 1 to 40 carbon atoms contains a linear alkylene moiety
- at least one methylene group is an ester bond, an amide
- the bond, carbonate bond, urethane bond (carbamoyl group), or urea bond may be substituted (however, the methylene group is not continuously replaced).
- a hydrogen atom contained in the organic group such as a hydrocarbon group having 1 to 40 carbon atoms or an oxygen-containing hydrocarbon group having 1 to 40 carbon atoms is an acid group such as a carboxyl group or a phosphate group, a hydroxyl group, an amino group.
- a functional group such as an epoxy group, or a polymerizable group such as an acryloyl group or a methacryloyl group.
- examples of suitable polymerizable compounds include polymerization in which R 5 is a linear alkylene group having 2 to 20 carbon atoms, preferably 4 to 12 carbon atoms. Compound.
- Examples of the preferred polymerizable compound having a methacryloyl group include 1,4-butanediol dimethacrylate, 1,6-hexanediol dimethacrylate, 1,8-octanediol dimethacrylate, 1,9- Nonandiol dimethacrylate, 1,10-decanediol dimethacrylate and the like can be mentioned.
- Examples of the preferred polymerizable compound having an acryloyl group include 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,8-octanediol diacrylate, 1,9- Nonandiol diacrylate, 1,10-decanediol diacrylate and the like can be mentioned.
- polymerizable compounds represented by the general formula (13) include those in which R 5 is a straight-chain oxy having 2 to 20 carbon atoms, preferably 4 to 12 carbon atoms.
- R 5 is a straight-chain oxy having 2 to 20 carbon atoms, preferably 4 to 12 carbon atoms.
- the polymerizable compound which is an alkylene group is mentioned.
- Examples of the preferred polymerizable compound having a methacryloyl group include ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, and tripropylene glycol dimethacrylate. , Tetrapropylene glycol dimethacrylate, polypropylene glycol dimethacrylate and the like.
- Examples of the preferred polymerizable compound having an acryloyl group include ethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, and tripropylene glycol diacrylate. , Tetrapropylene glycol diacrylate, polypropylene glycol diacrylate and the like.
- polymerizable compounds represented by the general formula (13) other examples include polymerizable compounds having a carbamoyl group represented by the following general formula (14).
- the compound represented by the following general formula (12) does not include the polymerizable monomer (A) for dental materials.
- R 3 and R 4 are hydrogen or a methyl group, which may be the same or different, and R 6 and R 7 may contain oxygen and have 1 to 12 carbon atoms. These are divalent organic groups, and these may be the same or different.
- Examples of the divalent organic group include hydrocarbon groups such as an acyclic hydrocarbon group having 1 to 12 carbon atoms such as an alkylene group, a cyclic hydrocarbon group having 1 to 12 carbon atoms such as a cycloalkylene group and an arylene group.
- the cyclic hydrocarbon group having 1 to 12 carbon atoms may have an acyclic hydrocarbon portion. Further, the acyclic hydrocarbon moiety contained in these groups may be either linear or branched.
- a hydrogen atom contained in the organic group such as the hydrocarbon group having 1 to 12 carbon atoms or the oxygen-containing hydrocarbon group having 1 to 12 carbon atoms is an acid group such as a carboxyl group or a phosphate group, a hydroxyl group, an amino group.
- a functional group such as an epoxy group, or a polymerizable group such as an acryloyl group or a methacryloyl group.
- R 8 represents a divalent organic group having 1 to 20 carbon atoms which may contain oxygen.
- the divalent organic group include an acyclic hydrocarbon group having 1 to 20 carbon atoms such as an alkylene group and a carbon-carbon bond between at least part of the hydrocarbon group such as an oxyalkylene group.
- an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms such as a group into which oxygen is inserted (however, oxygen is not continuously inserted).
- the cyclic hydrocarbon group having 1 to 20 carbon atoms may have an acyclic hydrocarbon portion. Further, the acyclic hydrocarbon moiety contained in these groups may be either linear or branched.
- a hydrogen atom contained in the organic group such as the hydrocarbon group having 1 to 20 carbon atoms or the oxygen-containing hydrocarbon group having 1 to 20 carbon atoms is an acid group such as a carboxyl group or a phosphoric acid group, a hydroxyl group, or an amino group. , May be replaced with a functional group such as an epoxy group.
- Examples of the compound having a methacryloyl group represented by the general formula (14) include 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, 4-hydroxy Hydroxy methacrylate such as butyl methacrylate or 1,4-cyclohexanedimethanol monomethacrylate and 2,4- or 2,6-toluene diisocyanate, 4,4′-, 2,4′- or 2,2′-diphenylmethane Urethane methacrylate which is a reaction product with diisocyanate such as diisocyanate, 1,6-hexamethylene diisocyanate, 2,2,4- or 2,4,4-trimethyl-1,6-hexamethylene diisocyanate And the like, as such urethane methacrylates, such as 2,2,4-trimethylhexamethylene bis (2-carbamoyloxyethyl) dimethacrylate
- Examples of the compound having an acryloyl group represented by the general formula (14) include, for example, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 4 Hydroxy acrylates such as hydroxybutyl acrylate or 1,4-cyclohexanedimethanol monoacrylate and 2,4- or 2,6-toluene diisocyanate, 4,4'-, 2,4'- or 2,2'- Examples include urethane acrylate which is a reaction product with diisocyanate such as diphenylmethane diisocyanate, 1,6-hexamethylene diisocyanate, 2,2,4- or 2,4,4-trimethyl-1,6-hexamethylene diisocyanate. It is, as such urethane acrylates, such as 2,2,4-trimethylhexamethylene bis (2-carbamoyloxy-ethyl) diacrylate.
- polymerizable compound represented by the general formula (13) is preferably a polymerizable compound represented by the following general formula (15).
- R 3 and R 4 represent hydrogen or a methyl group, which may be the same or different, and R 9 and R 10 may contain oxygen and have 1 to 12 carbon atoms.
- a divalent organic group which may be the same or different;
- Examples of the divalent organic group include hydrocarbon groups such as an acyclic hydrocarbon group having 1 to 12 carbon atoms such as an alkylene group, a cyclic hydrocarbon group having 1 to 12 carbon atoms such as a cycloalkylene group and an arylene group.
- the cyclic hydrocarbon group having 1 to 12 carbon atoms may have an acyclic hydrocarbon portion. Further, the acyclic hydrocarbon moiety contained in these groups may be either linear or branched.
- a hydrogen atom contained in the organic group such as the hydrocarbon group having 1 to 12 carbon atoms or the oxygen-containing hydrocarbon group having 1 to 12 carbon atoms is an acid group such as a carboxyl group or a phosphate group, a hydroxyl group, an amino group.
- a functional group such as an epoxy group, or a polymerizable group such as an acryloyl group or a methacryloyl group.
- R 11 represents a C 1-20 divalent organic group which may contain oxygen.
- Examples of the divalent organic group include a hydrocarbon group having 1 to 20 carbon atoms such as an alkylene group, a cycloalkylene group, and an arylene group; a carbon-carbon bond of at least a part of the hydrocarbon group such as an oxyalkylene group. And an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms such as a group in which oxygen is inserted (however, oxygen is not continuously inserted).
- the cyclic hydrocarbon group having 1 to 20 carbon atoms may have an acyclic hydrocarbon portion. Further, the acyclic hydrocarbon moiety contained in these groups may be either linear or branched.
- a hydrogen atom contained in the organic group such as a hydrocarbon group having 1 to 20 carbon atoms or an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms is an acid group such as a carboxyl group or a phosphate group, a hydroxyl group, or an amino group. , May be replaced with a functional group such as an epoxy group.
- Examples of the compound having a methacryloyl group represented by the general formula (15) include 2,2-bis [4- (3-methacryloyloxy-2-hydroxypropoxy) phenyl] propane (Bis-GMA), ethylene oxide modified Examples thereof include bisphenol A dimethacrylate and propylene oxide-modified bisphenol A dimethacrylate.
- Examples of the compound having an acryloyl group represented by the general formula (15) include 2,2-bis [4- (3-acryloyloxy-2-hydroxypropoxy) phenyl] propane, ethylene oxide-modified bisphenol A diacrylate, Examples include propylene oxide-modified bisphenol A diacrylate.
- attachment is contained as said polymeric compound (B).
- the polymerizable compound (B) exhibiting such an adhesion function include a polymerizable compound having at least one polymerizable group selected from a methacryloyl group and an acryloyl group and an acidic group.
- the acidic group include a phosphoric acid residue, a pyrophosphoric acid residue, a thiophosphoric acid residue, a carboxylic acid residue, and a sulfonic acid residue.
- Examples of the polymerizable compound having a methacryloyl group and a phosphate residue include 2-methacryloyloxyethyl dihydrogen phosphate, 9-methacryloyloxynonyl dihydrogen phosphate, 10-methacryloyloxydecyl dihydrogen phosphate, 11- Methacryloyloxyundecyl dihydrogen phosphate, 20-methacryloyloxyeicosyl dihydrogen phosphate, 1,3-dimethacryloyloxypropyl-2-dihydrogen phosphate, 2-methacryloyloxyethyl phenyl phosphate, 2-methacryloyloxyethyl Examples thereof include 2'-bromoethyl phosphoric acid, methacryloyloxyethyl phenylphosphonate, and acid chlorides thereof.
- Examples of the polymerizable compound having an acryloyl group and a phosphoric acid residue include 2-acryloyloxyethyl dihydrogen phosphate, 9-acryloyloxynonyl dihydrogen phosphate, 10-acryloyloxydecyl dihydrogen phosphate, 11- Acryloyloxyundecyl dihydrogen phosphate, 20-acryloyloxyeicosyl dihydrogen phosphate, 1,3-diacryloyloxypropyl-2-dihydrogen phosphate, 2-acryloyloxyethylphenyl phosphate, 2-acryloyloxyethyl Examples thereof include 2'-bromoethyl phosphoric acid, acryloyloxyethyl phenylphosphonate, and acid chlorides thereof.
- Examples of the polymerizable compound having a methacryloyl group and a pyrophosphate residue include di (2-methacryloyloxyethyl) pyrophosphate and acid chlorides thereof.
- Examples of the polymerizable compound having an acryloyl group and a pyrophosphate residue include di (2-acryloyloxyethyl) pyrophosphate and acid chlorides thereof.
- Examples of the polymerizable compound having a methacryloyl group and a thiophosphate residue include 2-methacryloyloxyethyl dihydrogen dithiophosphate, 10-methacryloyloxydecyl dihydrogenthiophosphate, and acid chlorides thereof. .
- Examples of the polymerizable compound having an acryloyl group and a thiophosphate residue include 2-acryloyloxyethyl dihydrogen dithiophosphate, 10-acryloyloxydecyl dihydrogen thiophosphate, and acid chlorides thereof. .
- Examples of the polymerizable compound having a methacryloyl group and a carboxylic acid residue include 4-methacryloyloxyethoxycarbonylphthalic acid, 5-methacryloylaminopentylcarboxylic acid and 11-methacryloyloxy-1,1-undecanedicarboxylic acid, and these Acid chloride or acid anhydride.
- Examples of the polymerizable compound having an acryloyl group and a carboxylic acid residue include 4-acryloyloxyethoxycarbonylphthalic acid, 5-acryloylaminopentylcarboxylic acid and 11-acryloyloxy-1,1-undecanedicarboxylic acid, and these Acid chloride or acid anhydride.
- Examples of the polymerizable compound having a methacryloyl group and a sulfonic acid residue include 2-sulfoethyl methacrylate and 2-methacrylamido-2-methylpropanesulfonic acid.
- Examples of the polymerizable compound having an acryloyl group and a sulfonic acid residue include 2-sulfoethyl acrylate and 2-acrylamido-2-methylpropanesulfonic acid.
- the polymerizable monomer composition for dental materials of the present invention may contain a polymerizable compound having an acidic group, which is not classified as the polymerizable compound (B).
- a polymerizable compound having an acidic group examples include a sulfonic acid residue-containing polymerizable compound such as styrenesulfonic acid.
- the amount of the polymerizable compound having an acidic group is not particularly limited, but the polymerization having an acidic group is performed.
- the polymerizable compound having an acidic group is dentally controlled so that the polymerizable group contained in the polymerizable compound is usually 50% or less based on the total number of polymerizable groups in the polymerizable monomer composition for dental materials. It is contained in the polymerizable monomer composition for materials.
- the viscosity of the polymerizable monomer composition for a dental material of the present invention is not particularly limited, but is preferably in the range of 1 to 100,000 mPa ⁇ s at 25 ° C., more preferably in the range of 5 to 60,000 mPa ⁇ s.
- the range of 10 to 30,000 mPa ⁇ s is more preferred, and the range of 100 to 10,000 mPa ⁇ s is even more preferred.
- components such as fillers are added to the polymerizable monomer composition for dental materials, and the dispersibility deteriorates when the dental material composition of the present invention is produced, and they are mixed uniformly. Can be difficult.
- the viscosity is lower than the above lower limit value, bubbles such as fillers are added to the polymerizable monomer composition for dental materials to produce the dental material composition of the present invention. May be difficult to mix with.
- the polymerizable monomer composition may be partially oligomerized by storage at a high temperature. The said viscosity is about the polymerizable monomer composition immediately after the adjustment before oligomerization.
- the hue of the polymerizable monomer composition for dental material in the present invention is not particularly limited, but it is preferable that the hue is good because it is used as a raw material for dental material.
- APHA is preferably 500 or less, more preferably 200 or less, and even more preferably 100 or less.
- the method for mixing the polymerizable monomer for dental material (A) and the polymerizable compound (B) is not particularly limited.
- the polymerizable monomer composition for dental material of the present invention is prepared by placing the polymerizable monomer for dental material (A) and the polymerizable compound (B) in a container and stirring the mixture until it becomes uniform while appropriately heating. Is obtained.
- the polymerizable monomer composition for dental materials of the present invention can contain the aforementioned polymerization inhibitor in order to improve its storage stability. As described above, it can be added when synthesizing the polymerizable monomer (A) for dental material, and can be added in the subsequent steps as necessary.
- the polymerizable monomer composition for dental materials of the present invention has room temperature, heating, or photopolymerizability by adding a polymerization initiator described later.
- the cured product of the polymerizable monomer composition for dental materials of the present invention has higher mechanical properties than the cured product of the conventional polymerizable monomer composition for dental materials, and particularly has high breaking strength and high fracture. It has a balance of both energy. In other words, it can be expressed as a material having both toughness and rigidity.
- additives such as bactericides, disinfectants, stabilizers and preservatives may be included in the polymerizable monomer composition for dental materials of the present invention as necessary as long as the effects of the present invention are not impaired.
- composition for dental materials The polymerizable monomer composition for a dental material of the present invention can be suitably used as a component of the composition for a dental material of the present invention, and the composition for a dental material includes the above-described polymerizable monomer composition for a dental material and a polymerization initiator. And a filler.
- a composition for a dental material has a room temperature polymerization property, a heat polymerization property, or a photopolymerization property, and can be preferably used as, for example, a dental restoration material.
- the polymerization initiator may be a general polymerization initiator used in the dental field, and is usually selected in consideration of the polymerizability of the polymerizable monomer and the polymerization conditions.
- a redox polymerization initiator in which an oxidizing agent and a reducing agent are combined is suitable.
- a redox polymerization initiator it is necessary to take a form in which an oxidizing agent and a reducing agent are separately packaged and to mix both of them immediately before use.
- oxidizing agent examples include, but are not limited to, organic peroxides such as diacyl peroxides, peroxyesters, dialkyl peroxides, peroxyketals, ketone peroxides, and hydroperoxides. Can do.
- organic peroxide examples include diacyl peroxides such as benzoyl peroxide, 2,4-dichlorobenzoyl peroxide and m-toluoyl peroxide; t-butylperoxybenzoate, bis-t-butylperoxy Peroxyesters such as isophthalate, 2,5-dimethyl-2,5-bis (benzoylperoxy) hexane, t-butylperoxy-2-ethylhexanoate and t-butylperoxyisopropylcarbonate; dicumyl Dialkyl peroxides such as peroxide, di-t-butyl peroxide and lauroyl peroxide; peroxyketals such as 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane; methyl ethyl ketone Paoki Ketone peroxides such as id, etc. hydroperoxide such as t- butyl
- the reducing agent is not particularly limited, but usually a tertiary amine is used.
- Tertiary amines include, for example, N, N-dimethylaniline, N, N-dimethyl-p-toluidine, N, N-dimethyl-m-toluidine, N, N-diethyl-p-toluidine, N, N— Dimethyl-3,5-dimethylaniline, N, N-dimethyl-3,4-dimethylaniline, N, N-dimethyl-4-ethylaniline, N, N-dimethyl-4-i-propylaniline, N, N- Dimethyl-4-t-butylaniline, N, N-dimethyl-3,5-di-t-butylaniline, N, N-bis (2-hydroxyethyl) -p-toluidine, N, N-bis (2- Hydroxyethyl) -3,5-dimethylaniline, N, N-bis (2-hydroxyeth
- redox systems such as cumene hydroperoxide / thiourea system, ascorbic acid / Cu 2+ salt system, organic peroxide / amine / sulfinic acid (or its salt) system, etc.
- a polymerization initiator can be used.
- tributylborane, organic sulfinic acid and the like are also preferably used as the polymerization initiator.
- the peroxide is not particularly limited, and examples thereof include benzoyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, and the like.
- the azo compound is not particularly limited, and examples thereof include azobisisobutyronitrile.
- redox initiators such as ⁇ -diketone / tertiary amine, ⁇ -diketone / aldehyde, ⁇ -diketone / mercaptan are preferable.
- the photopolymerization initiator is not particularly limited, and examples thereof include ⁇ -diketone / reducing agent, ketal / reducing agent, and thioxanthone / reducing agent.
- ⁇ -diketone include camphorquinone, benzyl and 2,3-pentanedione.
- ketal examples include benzyl dimethyl ketal and benzyl diethyl ketal.
- Examples of thioxanthone include 2-chlorothioxanthone and 2,4-diethylthioxanthone.
- Examples of the reducing agent include Mihira-ketone, 2- (dimethylamino) ethyl methacrylate, N, N-bis [(meth) acryloyloxyethyl] -N-methylamine, ethyl N, N-dimethylaminobenzoate, Butyl 4-dimethylaminobenzoate, butoxyethyl 4-dimethylaminobenzoate, N-methyldiethanolamine, 4-dimethylaminobenzophenone, N, N-bis (2-hydroxyethyl) -p-toluidine, dimethylaminophenanthol, etc.
- An ⁇ -diketone / organic peroxide / reducing agent system obtained by adding an organic peroxide to these redox systems is also preferably used.
- benzoin alkyl ether In the case of performing photopolymerization by ultraviolet irradiation, benzoin alkyl ether, benzyl dimethyl ketal and the like are suitable.
- a photopolymerization initiator of (bis) acylphosphine oxides is also preferably used.
- examples of the acylphosphine oxides include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 2,6-dimethoxybenzoyldiphenylphosphine oxide, and 2,6-dichlorobenzoyldiphenyl.
- bisacylphosphine oxides include bis- (2,6-dichlorobenzoyl) phenylphosphine oxide, bis- (2,6-dichlorobenzoyl) -2,5-dimethylphenylphosphine oxide, bis- ( 2,6-dichlorobenzoyl) -4-propylphenylphosphine oxide, bis- (2,6-dichlorobenzoyl) -1-naphthylphosphine oxide, bis- (2,6-dimethoxybenzoyl) phenylphosphine oxide, bis -(2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide, bis- (2,6-dimethoxybenzoyl) -2,5-dimethylphenylphosphine oxide, bis- (2,4,4) 6-Trimethylbenzoyl) phenyl Such as scan fins oxide and (2,5,6-trimethylbenzo
- acylphosphine oxide photopolymerization initiators can be used alone or in combination with reducing agents such as various amines, aldehydes, mercaptans and sulfinates. These can be suitably used in combination with the visible light photopolymerization initiator.
- the above polymerization initiator or photopolymerization initiator can be used alone or in combination of two or more, and the blending amount is usually 0.01 to 20% by weight, preferably 100% by weight based on the dental material composition. Is used in the range of 0.1 to 5% by weight.
- filler a general filler used in the dental field can be used. Fillers are generally divided into organic fillers and inorganic fillers.
- organic filler examples include polymethyl methacrylate, polyethyl methacrylate, methyl methacrylate-ethyl methacrylate copolymer, crosslinked polymethyl methacrylate, crosslinked polyethyl methacrylate, ethylene-vinyl acetate copolymer, and Examples thereof include fine powder made of a polymer such as a styrene-butadiene copolymer.
- the inorganic filler examples include various glasses (mainly composed of silicon dioxide, containing oxides such as heavy metals, boron and aluminum as necessary), various ceramics, diatomaceous earth, kaolin, clay mineral (montmorillonite, etc.). And fine powders made of inorganic substances such as activated clay, synthetic zeolite, mica, calcium fluoride, ytterbium fluoride, calcium phosphate, barium sulfate, zirconium dioxide, titanium dioxide, and hydroxyapatite.
- glasses mainly composed of silicon dioxide, containing oxides such as heavy metals, boron and aluminum as necessary
- various ceramics diatomaceous earth
- kaolin clay mineral (montmorillonite, etc.).
- fine powders made of inorganic substances such as activated clay, synthetic zeolite, mica, calcium fluoride, ytterbium fluoride, calcium phosphate, barium sulfate, zirconium dioxide, titanium dioxide, and hydroxyapatite.
- inorganic fillers include, for example, barium borosilicate glass (Kimbre Raysorb T3000, Shot 8235, Shot GM27884 and Shot GM39923, etc.), Strontiumboroaluminosilicate glass (Raysorb T4000, Shot G018-093 and Shot GM32087). ), Lanthanum glass (such as shot GM31684), fluoroaluminosilicate glass (such as shot G018-091 and shot G018-117), boroaluminosilicate glass containing zirconium and / or cesium (shot G018-307, G018-308 and G018) -310).
- barium borosilicate glass Kimbre Raysorb T3000, Shot 8235, Shot GM27884 and Shot GM39923, etc.
- Strontiumboroaluminosilicate glass Raysorb T4000, Shot G018-093 and Shot GM32087.
- Lanthanum glass such as shot GM31684
- an organic-inorganic composite filler obtained by adding a polymerizable monomer to these inorganic fillers in advance and making it into a paste, followed by polymerization and curing, and pulverization may be used.
- a composition containing a microfiller having a particle size of 0.1 ⁇ m or less is one of the preferred embodiments for a dental composite resin.
- a material of the filler having such a small particle size silica (for example, trade name Aerosil), alumina, zirconia, titania and the like are preferable.
- the blending of such an inorganic filler having a small particle diameter is advantageous in obtaining polishing smoothness of the cured composite resin.
- These fillers may be subjected to surface treatment with a silane coupling agent or the like depending on the purpose.
- a silane coupling agent examples include known silane coupling agents such as ⁇ -methacryloxyalkyltrimethoxysilane (carbon number between methacryloxy group and silicon atom: 3 to 12), ⁇ -methacryloxyalkyltriethoxy.
- Organosilicon compounds such as silane (carbon number between methacryloxy group and silicon atom: 3 to 12), vinyltrimethoxysilane, vinylethoxysilane and vinyltriacetoxysilane are used.
- the concentration of the surface treatment agent is usually 0.1 to 20% by weight, preferably 1 to 10% by weight, based on 100% by weight of the filler.
- the blending amount of the filler may be appropriately determined in consideration of the operability (consistency) of the composite resin paste and the mechanical properties of the cured product, and is 100% by weight of all components other than the filler contained in the dental material composition.
- the amount is usually 10 to 2000 parts by weight, preferably 50 to 1000 parts by weight, and more preferably 100 to 600 parts by weight.
- the dental material composition of the present invention may appropriately contain components other than the polymerizable monomer composition for dental material of the present invention, the above-described polymerization initiator, and the above-mentioned filler according to the purpose.
- a polymerization inhibitor as described above for improving storage stability may be included.
- pigments such as a well-known pigment and dye, can be included.
- a known reinforcing material such as fiber may be included.
- the dental material composition of the present invention can be cured under appropriate conditions in accordance with the polymerization method of the polymerization initiator described above.
- the dental material composition is processed into a predetermined shape, and then a known light irradiation device is used. By irradiating visible light for a predetermined time, a desired cured product can be obtained. Conditions such as irradiation intensity and irradiation intensity can be appropriately changed according to the curability of the dental material composition.
- the mechanical properties of the cured product can be improved by further heat-treating the cured product that has been cured by light irradiation, such as visible light, under appropriate conditions.
- the cured product of the composition for dental material of the present invention obtained as described above can be suitably used as a dental material.
- the method for using the composition for a dental material of the present invention is not particularly limited as long as it is generally known as a method for using a dental material.
- the dental material composition of the present invention is used as a composite resin for caries cavity filling, the dental cavity composition is filled with the dental material composition, and then light is emitted using a known light irradiation device.
- the purpose can be achieved by curing.
- when used as a composite resin for crowns after processing into an appropriate shape, it is photocured using a known light irradiation device, and further subjected to heat treatment under predetermined conditions to obtain a desired crown material. Obtainable.
- the cured product of the composition for dental materials of the present invention formulated with the polymerizable monomer composition for dental materials of the present invention is a cured product of the composition for conventional dental materials formulated with the conventional polymerizable monomer composition for dental materials. Compared to, it has high mechanical properties, and particularly exhibits high breaking bending breaking strength. Although the detailed reason why the cured product of the composition for dental materials of the present invention has high mechanical properties is unknown, in the case of a composition for dental materials, particularly a composite resin as a typical example, a polymerizable monomer The weight of the composition and filler accounts for the majority of the total amount of the composition, and the influence of these two components on the mechanical properties of the cured composite resin is very large.
- the strength of the inorganic filler is generally much higher, while the cured product of the polymerizable monomer composition for dental materials of the present invention. Is very flexible. Therefore, in the composite resin cured product, the inorganic filler is a hard segment component, and the cured product can be regarded as a soft segment component. In such a system, even if the rigidity of the soft segment component is unnecessarily improved, the mechanical properties of the cured composite resin are not improved, and on the contrary, a hard but brittle material may be obtained.
- the soft segment component it is considered that the mechanical properties of the cured composite resin are improved if the toughness is improved while maintaining a certain degree of rigidity.
- the polymerizable monomer composition for a dental material of the present invention is a material having both toughness and rigidity by containing a urethane acrylate compound (A) having a specific structure when cured, it is contained in a cured composite resin. It is presumed that it is suitable as a soft segment component, has high mechanical properties, and particularly exhibits high fracture bending fracture strength.
- composition for a dental material in the present invention can be suitably used as a dental material.
- a dental restorative material a denture base resin, a denture base lining material, an impression material, a bonding material (resin cement or resin added) Type glass ionomer cement), dental adhesive (orthodontic adhesive and cavity application adhesive), tooth fissure sealant, CAD / CAM resin block, temporary crown, artificial tooth material, etc. it can.
- the dental material composition of the present invention can be preferably used as a dental restoration material.
- the dental restoration materials are classified according to the scope of application, they can be classified into composite resins for crowns, composite resins for filling carious cavities, composite resins for abutment construction, composite resins for filling restorations, etc. Since the cured product of the composition exhibits high mechanical properties, it can be particularly preferably used as a composite resin for a crown.
- TEGDMA Triethylene glycol dimethacrylate UDMA: 2,2,4-trimethylhexamethylenebis (2-carbamoyloxyethyl) dimethacrylate
- HEA 2-hydroxyethyl acrylate 2HPA: 2-hydroxypropyl acrylate 2HBA: 2-hydroxybutyl acrylate 4HBA : 4-hydroxybutyl acrylate
- HPMA 2-hydroxypropyl methacrylate
- XDI 1,3-xylylene diisocyanate
- NBDI norbornene diisocyanate
- DBTDL dibutyltin dilaurate
- BHT dibutylhydroxytoluene
- CQ camphorquinone DMAB2-BE: 4- (dimethylamino) benzoic acid 2-Butoxyethyl acid [Bending test] The method of the bending test in the Example of this invention and a comparative example is shown below.
- test piece taken out from the mold was heat-treated in an oven at 110 ° C. for 15 minutes. After the test piece taken out from the oven was cooled to room temperature, the test piece was immersed in distilled water in a sealable sample bottle and kept at 37 ° C. for 24 hours.
- the obtained dental polymerization composition was placed in a 2 ⁇ 2 ⁇ 25 mm stainless steel mold and irradiated with light for 6 minutes on both sides for 3 minutes on one side using a visible light irradiation device (Solidlite V manufactured by Matsukaze Co., Ltd.). Further, the test piece taken out from the mold was heat-treated in an oven at 110 ° C. for 15 minutes. After the test piece taken out from the oven was cooled to room temperature, the test piece was immersed in distilled water in a sealable sample bottle and kept at 37 ° C. for 24 hours.
- a visible light irradiation device Solidlite V manufactured by Matsukaze Co., Ltd.
- the test piece prepared by the above method was subjected to a three-point bending test using a testing machine (Autograph EZ-S manufactured by Shimadzu Corporation) at a distance between fulcrums of 20 mm and a crosshead speed of 1 mm / min.
- the values in parentheses of the breaking strength and breaking energy results in Table 2 represent the increase / decrease value in% when compared with the measured value of Comparative Example 1.
- the viscosity in the production example of the present invention was measured by controlling the temperature to 65 ° C. using a circulating thermostatic water tank using the E-type viscometer.
- the dropping amount was controlled to be 80 ° C. or lower. After dropping the whole amount, the reaction temperature was kept at 80 ° C., and the reaction was carried out for 8 hours. At this time, the progress of the reaction was followed by HPLC analysis to confirm the end point of the reaction.
- the viscosity at 65 ° C. was 190 mPa ⁇ s. The results are shown in Table 1.
- Example 1 10.0 g (22.3 mmol) of the urethane acrylate obtained in Production Example 1 and 4.81 g (16.8 mmol) of TEGDMA are put in a container and stirred at 50 ° C. until uniform, and polymerization for dental materials is performed. A functional monomer composition was obtained. At this time, since the urethane acrylate obtained in Production Example 1 has two acryloyl groups and TEGDMA has two methacryloyl groups, it is obtained in Production Example 1 which is a polymerizable monomer (A) for dental materials.
- A polymerizable monomer
- the urethane acrylate-containing acryloyl group number accounts for 57% of the total polymerizable group number in the dental material polymerizable monomer composition, and the ratio of acryloyl group to methacryloyl group in the composition is 57:43 Become. It was 560 mPa * s when the viscosity at 25 degrees C of the obtained polymerizable monomer composition for dental materials was measured.
- Example 2 Using the urethane acrylate shown in Table 1 and other polymerizable monomers, a polymerizable monomer composition for a dental material was obtained in the same manner as in Example 1.
- Table 2 shows the results of the viscosity measurement at 25 ° C. and the bending test of the cured product of the polymerizable monomer composition for dental materials.
- Example 7 To 100 parts by weight of the polymerizable monomer composition for dental material obtained in Example 1, 300 parts by weight of filler (Fuselex-X), 0.5 parts by weight of CQ, and 0.5 parts by weight of DMAB2-BE were added. And mixed to obtain a composition for a dental material having a uniform paste. The results of the bending test of the cured product of the dental material composition are shown in Table 3.
- Example 8 A dental material was prepared in the same manner as in Example 7, except that the polymerizable monomer composition for dental material obtained in Example 2 was used instead of the polymerizable monomer composition for dental material obtained in Example 1. A composition was obtained. The results of the bending test of the cured product of the dental material composition are shown in Table 3.
- Example 1 A polymerizable monomer composition for a dental material was obtained according to the procedure of Example 1 except that the urethane acrylate obtained in Production Example 1 was changed to equimolar UDMA. Furthermore, the same operation as Example 1 was performed and the result of the bending test was obtained. The results are shown in Table 2.
- Comparative Example 2 The same operation as in Example 7 was carried out except that the polymerizable monomer composition for dental material obtained in Comparative Example 1 was used to obtain a uniform paste composition for dental material. The results of the bending test of the cured product of the dental material composition are shown in Table 3.
- the cured product of the polymerizable monomer composition for dental materials of the present invention has significantly improved breaking strength and breaking energy compared to the cured product of the conventional polymerizable monomer composition for dental materials. I understand that. That is, the cured product of the polymerizable monomer composition for dental materials of the present invention is shown to be a material having both toughness and rigidity.
- the cured product of the dental material composition containing the polymerizable monomer composition for a dental material of the present invention has a higher breaking strength than the cured product of the conventional dental material composition. It can be seen that it has improved. That is, it was shown that the breaking strength of the cured product of the dental material composition was improved by using the polymerizable monomer composition for dental material of the present invention having both toughness and rigidity.
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Abstract
Description
[3]前記一般式(1)において、Raが下記式(2)、または(3)で示される基である[1]または[2]に記載の歯科材料用重合性モノマー(A)。
本発明における歯科材料用重合性モノマー(A)は、下記一般式(1)で表される少なくとも1つのアクリロイル基を有するウレタンアクリレートからなる。
本発明における歯科材料用重合性モノマー組成物は、上述したウレタンアクリレートである歯科材料用重合性モノマー(A)を含有し、さらに他の重合性化合物を含有する。
上記重合性化合物(B)に含有される重合性基の数は、1つでもよいし、2つ以上でもよい。好ましい重合性基の数は2以上10以下であり、より好ましい重合性基の数は2以上6以下であり、さらに好ましい重合性基の数は2以上4以下である。これら重合性化合物(B)は、1種の化合物で構成されてもよいし、2種以上の化合物の混合物で構成されてもよい。
本発明の歯科材料用重合性モノマー組成物は、本発明の歯科材料用組成物の成分として好適に使用でき、歯科材料用組成物は、上述した歯科材料用重合性モノマー組成物、重合開始剤、及びフィラーを含有する。かかる歯科材料用組成物は、常温重合性、熱重合性、または光重合性を有し、例えば歯科修復材料として好ましく使用することができる。
TEGDMA:トリエチレングリコールジメタクリレート
UDMA:2,2,4-トリメチルヘキサメチレンビス(2-カルバモイルオキシエチル)ジメタクリレートHEA:2-ヒドロキシエチルアクリレート
2HPA:2-ヒドロキシプロピルアクリレート
2HBA:2-ヒドロキシブチルアクリレート
4HBA:4-ヒドロキシブチルアクリレート
HPMA:2-ヒドロキシプロピルメタクリレート
XDI:1,3-キシリレンジイソシアネート
NBDI:ノルボルネンジイソシアネート
DBTDL:ジブチルスズジラウレート
BHT:ジブチルヒドロキシトルエン
CQ:カンファーキノン
DMAB2-BE:4-(ジメチルアミノ)安息香酸2-ブトキシエチル
[曲げ試験]
本発明の実施例及び比較例における曲げ試験の方法を、以下に示す。
実施例及び比較例の歯科材料用重合性モノマー組成物100重量部に対して、CQ0.5重量部、DMAB2-BE0.5重量部を添加し、均一になるまで室温で撹拌して、光重合性モノマー溶液を得た。該光重合性モノマー溶液を、2x2x25mmのステンレス製型に入れ、可視光照射装置(松風社製 ソリディライトV)を用いて、片面3分間ずつ両面合わせて6分間ずつ光照射した。さらに型より取りだした試験片を、オーブン中において110℃、15分間の条件で熱処理した。オーブンより取り出した試験片を室温まで冷却したのち、密閉できるサンプル瓶中に試験片を蒸留水に浸漬して、37℃で24時間保持したものを試験片として使用した。
実施例及び比較例の歯科材料用重合性モノマー組成物100重量部、CQ0.5重量部、DMAB2-BE0.5重量部からなる光重合性モノマー溶液にシリカガラス(Fuselex-X(株式会社 龍森))300重量部を配合し、乳鉢を用いて均一になるまで撹拌したのち、脱泡を行うことで歯科用重合組成物を調製した。得られた歯科用重合組成物を、2x2x25mmのステンレス製型に入れ、可視光照射装置(松風社製 ソリディライトV)を用いて、片面3分間ずつ両面合わせて6分間ずつ光照射した。さらに型より取りだした試験片を、オーブン中において110℃、15分間の条件で熱処理した。オーブンより取り出した試験片を室温まで冷却したのち、密閉できるサンプル瓶中に試験片を蒸留水に浸漬して、37℃で24時間保持したものを試験片として使用した。
上記方法で作成した試験片を、試験機(島津製作所製 オートグラフEZ-S)を使用して、支点間距離20mm、クロスヘッドスピード1mm/分で三点曲げ試験を行った。なお、表2中の破断強度と破断エネルギー結果の括弧内の値は、比較例1の測定値と比べた場合の増減値を%で表したものである。
本発明の実施例及び比較例における粘度は、E型粘度計(東機産業製TVE-22H)を用い測定した。温度は循環式恒温水槽を用いて、25℃にコントロールした。
十分に乾燥させた攪拌羽根、及び温度計を備えた1リットル4ツ口フラスコ内に、2HPA418g(3.21モル)、DBTDL0.72g(2HPAとXDIの合計重量に対して0.1重量%)、及びBHT0.36g(2HPAとXDIの合計重量に対して0.05重量%)を添加し、均一となるまで撹拌した後、60℃に昇温した。続いて、XDI303g(1.61モル)を1時間かけて滴下した。滴下中に反応熱により内温が上昇したので、80℃以下となるように滴下量をコントロールした。全量滴下後反応温度を80℃に保って、10時間反応を行った。この際、HPLC分析で反応の進行を追跡して、反応の終点を確認した。反応器から生成物を排出することにより、下記式で表わされるウレタンアクリレート690gを得た。65℃における粘度は570mPa・sであった。結果を表1に示す。
十分に乾燥させた攪拌羽根、及び温度計を備えた1リットル4ツ口フラスコ内に、HEA390g(3.36モル)、DBTDL0.74g(HEAとNBDIの合計重量に対して0.1重量%)、BHT0.37g(HEAとNBDIの合計重量に対して0.05重量%)を添加し、均一になるまで撹拌した後、60℃に昇温した。続いて、NBDI346g(1.68モル)を1時間かけて滴下した。滴下中に反応熱により内温が上昇したので、80℃以下となるように滴下量をコントロールした。全量滴下後反応温度を80℃に保って、10時間反応を行った。この際、HPLC分析で反応の進行を追跡して、反応の終点を確認した。反応器から生成物を排出することにより、下記式で表わされるウレタンアクリレート700gを得た。65℃における粘度は930mPa・sであった。結果を表1に示す。
十分に乾燥させた攪拌羽根、及び温度計を備えた1リットル4ツ口フラスコ内に、2HBA390g(2.70モル)、DBTDL0.67g(2HBAとNBDIの合計重量に対して0.1重量%)、BHT0.34g(2HBAとNBDIの合計重量に対して0.05重量%)を添加し、均一になるまで撹拌した後、60℃に昇温した。続いて、NBDI278g(1.35モル)を1時間かけて滴下した。滴下中に反応熱により内温が上昇したので、80℃以下となるように滴下量をコントロールした。全量滴下後反応温度を80℃に保って、12時間反応を行った。この際、HPLC分析で反応の進行を追跡して、反応の終点を確認した。反応器から生成物を排出することにより、下記式で表わされるウレタンアクリレート620gを得た。65℃における粘度は2030mPa・sであった結果を表1に示す。
十分に乾燥させた攪拌羽根、及び温度計を備えた1リットル4ツ口フラスコ内に、4HBA390g(2.70モル)、DBTDL0.67g(4HBAとNBDIの合計重量に対して0.1重量%)、BHT0.34g(4HBAとNBDIの合計重量に対して0.05重量%)を添加し、均一となるまで撹拌した後、60℃に昇温した。続いて、NBDI278g(1.35モル)を1時間かけて滴下した。滴下中に反応熱により内温が上昇したので、80℃以下となるように滴下量をコントロールした。全量滴下後反応温度を80℃に保って、8時間反応を行った。この際、HPLC分析で反応の進行を追跡して、反応の終点を確認した。反応器から生成物を排出することにより、下記式で表わされるウレタンアクリレート630gを得た。65℃における粘度は360mPa・sであった。結果を表1に示す。
十分に乾燥させた攪拌羽根、及び温度計を備えた1リットル4ツ口フラスコ内に、2HBA390g(2.70モル)、DBTDL0.64g(2HBAとXDIの合計重量に対して0.1重量%)、BHT0.34g(2HBAとXDIの合計重量に対して0.05重量%)を添加し、均一となるまで撹拌した後、60℃に昇温した。続いて、XDI254g(1.35モル)を1時間かけて滴下した。滴下中に反応熱により内温が上昇したので、80℃以下となるように滴下量をコントロールした。全量滴下後反応温度を80℃に保って、8時間反応を行った。この際、HPLC分析で反応の進行を追跡して、反応の終点を確認した。反応器から生成物を排出することにより、下記式で表わされるウレタンアクリレート600gを得た。65℃における粘度は520mPa・sであった。結果を表1に示す。
十分に乾燥させた攪拌羽根、及び温度計を備えた1リットル4ツ口フラスコ内に、HPMA195g(1.35モル)、4HBA195g(1.35モル)、DBTDL0.64g(HPMA、4HBAとXDIの合計重量に対して0.1重量%)、BHT0.32g(HPMA、4HBAとXDIの合計重量に対して0.05重量%)を添加し、均一になるまで撹拌した後に、60℃に昇温した。続いて、XDI254g(1.35モル)を1時間かけて滴下した。滴下中に反応熱により内温が上昇したので、80℃以下となるように滴下量をコントロールした。全量滴下後反応温度を80℃に保って、8時間反応を行った。この際、HPLC分析で反応の進行を追跡して、反応の終点を確認した。反応器から生成物を排出することにより、下記式で表わされる3種のウレタンアクリレート混合物600gを得た。65℃における粘度は190mPa・sであった。結果を表1に示す。
製造例1で得られたウレタンアクリレート10.0g(22.3ミリモル)と、TEGDMA4.81g(16.8ミリモル)とを容器に入れ、均一になるまで50℃で撹拌して、歯科材料用重合性モノマー組成物を得た。このとき、製造例1で得られたウレタンアクリレートはアクリロイル基を2個有し、TEGDMAはメタクリロイル基を2個有しているので、歯科材料用重合性モノマー(A)である製造例1で得られたウレタンアクリレート含有のアクリロイル基数が該歯科材料用重合性モノマー組成物の全重合性基数に占める割合は57%であり、該組成物中のアクリロイル基とメタクリロイル基の比率は、57:43となる。得られた歯科材料用重合性モノマー組成物の25℃における粘度を測定したところ、560mPa・sであった。
表1に示すウレタンアクリレートとその他の重合性モノマーを用いて、実施例1と同様の操作で、歯科材料用重合性モノマー組成物を得た。該歯科材料用重合性モノマー組成物の25℃における粘度測定と硬化物の曲げ試験の結果を表2に示す。
実施例1で得られた歯科材料用重合性モノマー組成物100重量部に対して、フィラー(Fuselex-X)300重量部、CQ 0.5重量部、DMAB2-BE 0.5重量部を添加し、混合し、均一なペーストの歯科材料用組成物を得た。該歯科材料用組成物の硬化物の曲げ試験の結果は表3に示す。
実施例1で得られた歯科材料用重合性モノマー組成物の代わりに、実施例2で得られた歯科材料用重合性モノマー組成物を用いた以外は、実施例7と同様の操作で歯科材料用組成物を得た。該歯科材料用組成物の硬化物の曲げ試験の結果は表3に示す。
製造例1で得られたウレタンアクリレートを等モルのUDMAに変更した以外は、実施例1の操作に従い、歯科材料用重合性モノマー組成物を得た。さらに、実施例1と同様の操作を行い、曲げ試験の結果を得た。結果を表2に示す。
比較例1で得られた歯科材料用重合性モノマー組成物を用いた以外は実施例7と同様の操作を行い、均一なペーストの歯科材料用組成物を得た。該歯科材料用組成物の硬化物の曲げ試験の結果は表3に示す。
Claims (9)
- 前記一般式(1)において、Rdが水素原子である請求項1に記載の歯科材料用重合性モノマー(A)。
- 前記一般式(1)中のRbおよびRcが、それぞれ独立に、水素原子が炭素数1~3のアルキル基で置換されていてもよい炭素数2~6の直鎖アルキレン基、または直鎖オキシアルキレン基であることを特徴とする請求項1~4のいずれか1項に記載の歯科材料用重合性モノマー(A)。
- 請求項1~5のいずれか1項に記載の歯科材料用重合性モノマー(A)を含む歯科材料用重合性モノマー組成物。
- 25℃における粘度が1~100、000mPa・sであることを特徴とする請求項6に記載の歯科材料用重合性モノマー組成物。
- 請求項6または7に記載の歯科材料用重合性モノマー組成物、重合開始剤、及びフィラーを含有する歯科材料用組成物。
- 請求項8に記載の歯科材料用組成物を硬化させてなる歯科材料。
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