WO2014203606A1 - ポリアミド樹脂組成物及び成形体 - Google Patents
ポリアミド樹脂組成物及び成形体 Download PDFInfo
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- WO2014203606A1 WO2014203606A1 PCT/JP2014/060850 JP2014060850W WO2014203606A1 WO 2014203606 A1 WO2014203606 A1 WO 2014203606A1 JP 2014060850 W JP2014060850 W JP 2014060850W WO 2014203606 A1 WO2014203606 A1 WO 2014203606A1
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- resin composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/06—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0869—Acids or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
Definitions
- the present invention relates to a polyamide resin composition and a molded body.
- polyamide resins reinforced with glass fibers are excellent in strength, heat resistance, chemical resistance, specific gravity, and the like, and are therefore used as mechanical substitutes for automobiles as mechanical substitutes.
- the members around the engine are required to have strength and vibration fatigue characteristics under high temperature environment. Therefore, reinforced polyamide resin compositions are suitable, and glass fiber reinforced compositions of various polyamide resins have been proposed. (For example, see Patent Documents 1 and 2).
- Patent Document 4 discloses a glass fiber reinforced polyamide resin composition containing an ethylene / ethyl acrylate / maleic anhydride terpolymer.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a polyamide resin composition excellent in durability, particularly vibration fatigue resistance, and a molded product thereof.
- the present invention is as follows. [1] (A) a polyamide resin; (B) a glass fiber having a compound of a carboxylic acid anhydride-containing unsaturated vinyl monomer on at least a part of the surface; (C) a copolymer containing a carboxylic acid anhydride-containing unsaturated vinyl monomer and having a glass transition temperature Tg exceeding 0 ° C; A polyamide resin composition. [2] In the polyamide resin composition, a grafted polyamide resin is present at the interface between the polyamide resin and (B) glass fiber, and the amount of the grafted polyamide resin is 0.15 to 100 parts by weight of (B) glass fiber.
- the polyamide resin composition according to [1] which is 2 parts by mass.
- the (B) glass fiber is contained in an amount of 5 to 200 parts by mass with respect to 100 parts by mass of the (A) polyamide resin, and the (C) copolymer is 100 parts by mass of the (A) polyamide resin.
- the polyamide resin (A) is polyamide 46 (polytetramethylene adipamide), polyamide 66 (polyhexamethylene adipamide), polyamide 610, polyamide 612, polyamide 6T (polyhexamethylene terephthalamide), polyamide 9T (poly Nonane methylene terephthalamide), polyamide 6I (polyhexamethylene isophthalamide) and polyamide MXD6 (polymetaxylylene adipamide) and at least one selected from the group consisting of copolymerized polyamides containing these as constituents,
- the polyamide resin composition according to any one of [1] to [7].
- the present embodiment a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail.
- this invention is not limited to the following embodiment, It can implement by changing variously within the range of the summary.
- the polyamide resin composition of this embodiment comprises (A) a polyamide resin, (B) a glass fiber having a compound of a carboxylic acid anhydride-containing unsaturated vinyl monomer on at least a part of the surface, and a carboxylic acid anhydride (C) a copolymer containing an unsaturated vinyl monomer and having a glass transition temperature Tg exceeding 0 ° C.
- the polyamide resin composition of this embodiment can exhibit the outstanding durability, especially vibration fatigue resistance.
- the (B) glass fiber is contained in an amount of 5 parts by mass to 200 parts by mass with respect to 100 parts by mass of the (A) polyamide resin.
- both the fluidity and appearance of the glass fiber reinforced polyamide resin composition tend to be more excellent. From the same viewpoint, it is more preferably 5 parts by mass or more and 150 parts by mass or less, and further preferably 15 parts by mass or more and 100 parts by mass or less.
- the (C) copolymer is preferably contained in an amount of 2 parts by mass or less with respect to 100 parts by mass of the (A) polyamide resin.
- content of the copolymer is 2 parts by mass or less, excessive crosslinking of the polyamide terminal can be suppressed, good fluidity and appearance can be maintained, and the effect of improving the vibration fatigue resistance is increased. There is a tendency.
- content of (C) copolymer is 0.01 mass part or more. The addition of 0.01 parts by mass or more tends to increase the effect of improving vibration fatigue resistance.
- it is more preferably 0.01 parts by mass or more and 1 part by mass or less, further preferably 0.01 parts by mass or more and 0.6 parts by mass or less, and 0.01 parts by mass or more and 0.3 parts by mass or less.
- the part by mass or less is even more preferable.
- (B) glass fiber is contained in an amount of 5 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of (A) polyamide resin, and (C) It is particularly preferable that the copolymer is contained in an amount of 0.01 to 2 parts by mass with respect to 100 parts by mass of the (A) polyamide resin.
- the polyamide resin composition of the present embodiment preferably has a tensile strength at 80 ° C. of 70% or more with respect to a tensile strength of 23 ° C.
- a tensile strength at 80 ° C. of 70% or more With respect to a tensile strength of 23 ° C.
- it tends to be more excellent in durability, particularly vibration fatigue resistance when used in a high temperature environment (80 ° C. or higher, (A) melting point temperature of polyamide resin or lower).
- the tensile strength under each temperature can be measured by the method described in Examples described later.
- Polyamide resin means a polymer compound having a —CO—NH— (amide) bond in the main chain.
- the polyamide resin as a raw material which comprises the polyamide resin composition of this embodiment is pointed out, a code
- the polyamide resin in the polyamide resin composition of the present embodiment is not particularly designated, and is simply “polyamide”. It is written as “resin”.
- Examples of (A) polyamide resin in the present embodiment include (a) polyamide obtained by ring-opening polymerization of lactam, (b) polyamide obtained by self-condensation of ⁇ -aminocarboxylic acid, (c) diamine and dicarboxylic acid Examples thereof include, but are not limited to, polyamides obtained by condensing, and copolymers thereof.
- As (A) polyamide resin in this embodiment 1 type mentioned above may be used independently, and may be used as a 2 or more types of mixture.
- the lactam as a monomer that is a constituent component of the (A) polyamide resin is not particularly limited, and examples thereof include pyrrolidone, caprolactam, undecaractam, and dodecaractam.
- the ⁇ -aminocarboxylic acid is not particularly limited, but for example, ⁇ -amino fatty acid which is a ring-opening compound of the above lactam with water can be used.
- the lactam or the ⁇ -aminocarboxylic acid may be a condensation product of two or more monomers (the lactam or the ⁇ -aminocarboxylic acid).
- the diamine (monomer) is not particularly limited, and examples thereof include linear aliphatic diamines such as hexamethylene diamine, pentamethylene diamine, and nonamethylene diamine; 2-methylpentane. Branched aliphatic diamines such as diamine and 2-ethylhexamethylenediamine; aromatic diamines such as p-phenylenediamine, m-phenylenediamine and m-xylylenediamine; cyclohexanediamine, cyclopentanediamine and cyclooctanediamine An alicyclic diamine is mentioned.
- the dicarboxylic acid (monomer) is not particularly limited, and examples thereof include aliphatic dicarboxylic acids such as adipic acid, pimelic acid, sebacic acid, and dodecanedioic acid; aromatic dicarboxylic acids such as terephthalic acid and isophthalic acid.
- An alicyclic dicarboxylic acid such as cyclohexanedicarboxylic acid;
- the (A) polyamide resin obtained in the case of (c) above may be a single resin or a mixture of two or more of the above diamines and dicarboxylic acids used in combination.
- the polyamide obtained by condensing the above diamine and dicarboxylic acid is polymerized, for example, by dehydrating and condensing an aqueous salt solution in which equimolar amounts of diamine and dicarboxylic acid are dissolved. It is preferable to perform polymerization by adjusting the temperature and pressure to be suitable by a known method.
- the polyamide resin (A) in the present embodiment obtained as described above is not particularly limited.
- polyamide 4 poly ⁇ -pyrrolidone
- polyamide 6 polycaproamide
- polyamide 11 polyundecanamide
- Polyamide 12 polydodecanamide
- polyamide 46 polytetramethylene adipamide
- polyamide 66 polyhexamethylene adipamide
- polyamide 610 polyamide 612
- polyamide 6T polyhexamethylene terephthalamide
- polyamide 9T Polynonanemethylene terephthalamide
- polyamide 6I polyhexamethylene isophthalamide
- polyamide 2Me5T poly-2-methylpentamethylene terephthalamide
- polyamide MXD6 polymetaxylylene adipamide
- the copolymerized polyamide is not particularly limited.
- a copolymer of hexamethylene adipamide and hexamethylene terephthalamide a copolymer of hexamethylene adipamide and hexamethylene isophthalamide, hexamethylene terephthalamide and 2 -Methylpentanediamine terephthalamide copolymer and the like.
- polyamide 46 polytetramethylene adipamide
- polyamide 66 polyhexamethylene adipamide
- polyamide 610 polyamide 612
- polyamide 6T polyhexamethylene terephthalamide
- polyamide 9T polynonane methylene terephthalate
- polyamide 6I polyhexamethylene isophthalamide
- polyamide MXD6 polymetaxylylene adipamide
- copolymerized polyamides containing these as constituents are preferred, including hexamethylene adipamide (polyamide 66) and polyamide 66.
- a copolymer is more preferred.
- the polyamide resin in the present embodiment is preferably blended in the polyamide resin composition at 33% by mass or more and 95% by mass or less.
- the polyamide resin composition of this embodiment contains (A) a polyamide resin in the above range, it tends to be superior in strength, heat resistance, chemical resistance, specific gravity, and the like. From the same viewpoint, it is more preferable that (A) the polyamide resin is blended in the polyamide resin composition at 50% by mass or more and 75% by mass or less.
- the amino terminal amount of the (A) polyamide resin used as a raw material is 40 [mmol / kg] or more.
- the amino terminal amount of the (A) polyamide resin used as the raw material is 40 [mmol / kg] or more
- (B) a component contained on the surface of the glass fiber (C) an interaction with the copolymer, Specifically, the number of chemical reaction points with the carboxylic acid anhydride functional group increases, and a higher vibration fatigue resistance improving effect tends to be obtained.
- the amino terminal amount can be adjusted, for example, by adjusting the amount of amine monomer or carboxylic acid monomer added during polymerization, solid-state polymerization conditions, a combination thereof, or the like.
- the amino terminal amount (end group concentration) can be measured, for example, by 1 H-NMR measurement at 60 ° C. using a bisulfate solvent. That is, it can be calculated by determining the integrated values of the peaks corresponding to the amino group terminal and the carboxyl group terminal obtained by the NMR measurement.
- the relative viscosity of sulfuric acid of the (A) polyamide resin in the present embodiment is preferably 1.8 or more and 3.0 or less.
- the relative viscosity is preferably 1.8 or more, a polyamide resin composition having more excellent mechanical properties tends to be obtained.
- the relative viscosity is 3.0 or less, a polyamide resin composition having more excellent fluidity and appearance tends to be obtained.
- the relative viscosity is more preferably 2.2 or more and 2.8 or less.
- the relative viscosity can be adjusted by changing the pressure during polymerization.
- the relative viscosity can be measured by the method described in JIS K 6920.
- the glass fiber (B) in this embodiment has a carboxylic anhydride-containing unsaturated vinyl monomer compound on at least a part of its surface.
- the compound of a carboxylic acid anhydride-containing unsaturated vinyl monomer in the present embodiment means a polymer in which at least one of the components constituting the main chain is a carboxylic acid anhydride-containing unsaturated vinyl monomer.
- the “component constituting the main chain” means that the active group of the component (monomer) itself, such as a vinyl group, continuously reacts to form a multimer. Means a component constituting the main chain.
- the state of “having at least a part of the surface” can be specifically achieved by, for example, applying, impregnating, etc. a specific component to the surface of the glass fiber.
- glass fiber has the compound of a carboxylic acid anhydride containing unsaturated vinyl monomer in at least one part of the surface by well-known analysis methods, such as IR and NMR.
- a specific component is applied to the surface of the glass fiber using a known apparatus or method such as a roller-type applicator. For example.
- the polyamide resin composition of the present embodiment contains (B) glass fiber, it can exhibit excellent durability. In addition, it is preferable to contain 5 mass parts or more and 200 mass parts or less of (B) glass fiber with respect to 100 mass parts of (A) polyamide resin.
- (B) Glass fiber in this embodiment is not specifically limited, For example, it can be used with forms, such as glass roving for thermoplastic resin reinforcement, the said glass chopped strand for thermoplastic resin reinforcement, etc.
- the glass fiber in this embodiment is not particularly limited, but the average fiber diameter is preferably 5 ⁇ m or more and 30 ⁇ m or less. In this case, there exists a tendency for the polyamide resin composition which was further excellent in intensity
- the glass fiber is preferably 2.8 mm or more and 3.2 mm or less of chopped strands.
- “substantially” means that chopped strands of 2.8 mm or more and 3.2 mm or less are 95% by mass or more in the total mass of (B) glass fiber.
- the average fiber diameter and average fiber length in this specification are the average value of the value obtained by measuring the diameter and length of 500 fibers extracted at random.
- the surface of the (B) glass fiber in this embodiment is preferably treated with a silane coupling agent from the viewpoint of enhancing the affinity between the (B) glass fiber and another substance such as a resin. Further, from the viewpoint of increasing the affinity between (B) glass fibers and other substances such as resins, it is preferable that (B) glass fibers in this embodiment are coated with a sizing agent to be described later. In this embodiment, it is particularly preferable that the (B) glass fiber has a surface treated with a silane coupling agent and coated with a sizing agent.
- the silane coupling agent is not particularly limited.
- aminosilanes such as ⁇ -aminopropyltriethoxysilane, ⁇ -aminopropyltrimethoxysilane, N- ⁇ - (aminoethyl) - ⁇ -aminopropylmethyldimethoxysilane, and the like.
- mercaptosilanes such as ⁇ -mercaptopropyltrimethoxysilane and ⁇ -mercaptopropyltriethoxysilane
- epoxysilanes vinylsilanes.
- aminosilanes are more preferred.
- the sizing agent is applied to the surface of (B) the glass fiber, for example, for the purpose of (B) bundling the glass fiber or for increasing the affinity between the (B) glass fiber and another substance such as a resin. Is equal.
- the application is not particularly limited, and for example, a method described in (B) Method for preparing glass fiber described later can be employed.
- the sizing agent preferably contains a carboxylic acid anhydride-containing unsaturated vinyl monomer compound from the viewpoint of further improving the vibration fatigue resistance of the polyamide resin composition and the molded product thereof. That is, you may have the compound of the carboxylic acid anhydride containing unsaturated vinyl monomer in this embodiment mentioned above as a sizing agent in at least one part of the surface of (B) glass fiber.
- the sizing agent from the viewpoint of further improving the vibration fatigue resistance of the polyamide resin composition and the molded product thereof in the present embodiment, at least one of the components constituting the main chain is an unsaturated monocarboxylic acid and / or its A polymer which is a derivative may further be included. That is, in this embodiment, (B) the glass fiber further has a polymer in which at least one of the components constituting the main chain is an unsaturated monocarboxylic acid and / or a derivative thereof on at least a part of the glass fiber surface. You may do it.
- unsaturated monocarboxylic acid refers to a compound having one or more carbon-carbon double bonds and one carboxyl group in the molecule. Both cyclic and acyclic are suitable, but acyclic unsaturated monocarboxylic acids are particularly preferred.
- the above-mentioned “derivative of unsaturated monocarboxylic acid” refers to a compound in which a functional group is introduced into the unsaturated monocarboxylic acid. Although it is not particularly limited, for example, it means an esterified carbonyl group with an alcohol such as methanol, ethanol or propanol.
- the sizing agent may contain a polyurethane resin.
- the polyurethane resin is not particularly limited as long as it is generally used as a glass fiber sizing agent.
- isocyanates such as m-xylylene diisocyanate (XDI), 4,4'-methylenebis (cyclohexyl isocyanate) (HMDI), isophorone diisocyanate (IPDI), and polyester or polyether diols.
- XDI m-xylylene diisocyanate
- HMDI 4,4'-methylenebis (cyclohexyl isocyanate)
- IPDI isophorone diisocyanate
- polyester or polyether diols polyester or polyether diols.
- the sizing agent may be prepared in any form, such as an aqueous solution, a colloidal dispersion, or an emulsion using an emulsifier, depending on the use mode.
- the sizing agent is preferably applied (attached) so that the solid content is 0.2% by mass or more and 3% by mass or less with respect to 100% by mass of (B) glass fiber. Is applied (attached) so as to be 0.3 mass% or more and 2 mass% or less.
- the amount of the sizing agent attached is preferably 0.2% by mass or more as a solid content with respect to 100% by mass of (B) glass fiber. On the other hand, it is preferable that it is 3 mass% or less from a viewpoint of the thermal stability improvement of the glass fiber reinforced thermoplastic resin composition mentioned later.
- the said adhesion amount can be measured by the method similar to description of the Example mentioned later.
- the polyamide resin composition of the present embodiment contains a carboxylic acid anhydride-containing unsaturated vinyl monomer and contains a (C) copolymer having a glass transition temperature Tg exceeding 0 ° C.
- the phrase “containing a carboxylic acid anhydride-containing unsaturated vinyl monomer” means that at least one of the components constituting the main chain of the copolymer (C) includes a carboxylic acid anhydride-containing unsaturated vinyl monomer. .
- the polyamide resin composition of this embodiment contains a carboxylic acid anhydride-containing unsaturated vinyl monomer and contains a copolymer (C) having a glass transition temperature (Tg) exceeding 0 ° C.
- Tg glass transition temperature
- Tg is larger than 60 ° C.
- the effect of improving vibration fatigue resistance tends to be obtained more greatly.
- Tg is smaller than 200 ° C.
- the effect of improving vibration fatigue resistance tends to be obtained more greatly.
- Tg is 0 ° C. or lower, the effect of improving vibration fatigue resistance cannot be sufficiently obtained.
- the Tg can be measured at a rate of temperature increase of 20 ° C./min using Diamond-DSC manufactured by PERKIN-ELMER according to JIS-K7121.
- the copolymer in this embodiment is not particularly limited as long as it contains a carboxylic acid anhydride-containing unsaturated vinyl monomer and has a glass transition temperature Tg exceeding 0 ° C.
- ethylene-maleic anhydride copolymer, propylene-maleic anhydride copolymer, butadiene-maleic anhydride copolymer, styrene-maleic anhydride copolymer, acrylonitrile-maleic anhydride copolymer, etc. are used. can do.
- those that do not contain an aromatic derivative monomer as a main chain component for example, but not limited to, ethylene-maleic anhydride copolymer, propylene-maleic anhydride copolymer) Butadiene-maleic anhydride copolymer, acrylonitrile-maleic anhydride copolymer, etc. are preferably used, and from the viewpoint of improving vibration fatigue resistance, it is preferable to employ ethylene-maleic anhydride copolymer. .
- the weight average molecular weight of the (C) copolymer in this embodiment is preferably 600,000 or less. More preferably, it is 10,000 or more and 500,000 or less. Most preferably, it is 60,000 or more and 400,000 or less.
- the weight average molecular weight is 10,000 or more, thermal stability is improved, and decomposition and the like when the polyamide resin composition is subjected to an extrusion process tend to be suppressed.
- the weight average molecular weight is 600,000 or less, the dispersibility of the (C) copolymer in the polyamide is improved, and the vibration fatigue resistance property of the polyamide resin composition tends to be improved.
- the weight average molecular weight is 400,000 or less, there is a tendency that a polyamide resin composition further excellent in vibration fatigue resistance can be obtained.
- the weight average molecular weight in this specification can be calculated
- the acid value of the (C) copolymer in this embodiment is preferably 0.1 or more. More preferably, it is 0.2 or more. Moreover, it is preferable that it is 0.5 or less.
- (C) When a copolymer has said acid value, it exists in the tendency for the better vibration fatigue-resistant characteristic improvement effect to be acquired.
- the acid value in the present specification is determined by measuring the number of mg of potassium hydroxide required to neutralize the acid present in 1 g of (C) copolymer in accordance with JIS K0070. Can do.
- the polyamide resin composition of this embodiment can contain (D) a heat stabilizer.
- “Thermal stabilizer” is a stabilizer added to suppress deterioration due to heat, such as a phenol-based heat stabilizer, a phosphorus-based heat stabilizer, an amine-based heat stabilizer, and a copper-based heat stabilizer. It is done. That is, when the polyamide resin composition of this embodiment contains (D) a heat stabilizer, it tends to be able to suppress deterioration due to heat more.
- the content of (D) the heat stabilizer is not particularly limited, but from the viewpoint of effective suppression of deterioration due to heat, prevention of coloring, maintenance of mechanical properties, etc. It is preferably contained in the range of parts by mass.
- phenolic heat stabilizer is a molecule containing a phenol group, and examples thereof include Irganox (registered trademark) 1098 (manufactured by BASF), but are not limited thereto.
- phosphorus heat stabilizer is a molecule containing a phosphorus element, for example, PEP (trademark registered) 36 (manufactured by ADEKA), but is not limited thereto.
- amine heat stabilizer is a molecule containing an amine, and examples thereof include Nyrostab (registered trademark) S-EED (manufactured by Clariant), but are not limited thereto.
- copper heat stabilizer means a stabilizer containing a mixture of a copper salt and an alkali metal halide and / or an alkaline earth metal halide.
- Specific examples of the copper-based heat stabilizer include a stabilizer containing a mixture of copper (I) iodide and potassium iodide, a mixture of copper (I) iodide and potassium bromide, etc., but is not limited thereto. Is not to be done.
- a thermal stabilizer contains copper from a viewpoint of a vibration fatigue-resistant characteristic improvement. That is, it is preferable that the polyamide resin composition of this embodiment contains a copper-based heat stabilizer.
- other components may be added as necessary within a range not impairing the effects of the present embodiment.
- other components include, but are not limited to, inorganic fillers other than glass fibers, antioxidants, ultraviolet absorbers, heat stabilizers, photodegradation inhibitors, plasticizers, lubricants, mold release agents, and nucleating agents.
- a flame retardant, a colorant, a dyeing agent, a pigment, or the like may be added, or another thermoplastic resin may be mixed.
- the properties of the other components are greatly different from each other, and therefore, suitable content ratios of the respective components that hardly impair the effects of the present embodiment are various and can be appropriately set.
- the method for producing the polyamide resin composition is not particularly limited, but (A) polyamide resin, (B) glass fiber, (C) copolymer, and other desired components are mixed. And a kneading method using a predetermined single-screw or multi-screw extruder. Specifically, when (B) glass chopped strand is used as the glass fiber, a twin screw extruder having an upstream supply port and a downstream supply port is used, and thermoplastic resin is supplied from the upstream supply port. It is preferable to use a method in which the glass chopped strand is supplied from the downstream supply port and melt-kneaded. Further, when glass roving is used, it can be combined by a known method.
- a method for producing a polyamide resin composition (A) a polyamide resin and (B) glass fiber are melt-kneaded, and then (C) a copolymer is added and further melt-kneaded. More preferred. That is, in the present embodiment, a preferable method for producing a polyamide resin composition includes (A) a polyamide resin and (B) a glass fiber melt-kneaded step (a), and after step (a), (C) And a step (b) of adding a polymer and further melt-kneading.
- one upstream supply port and two downstream supply ports (a more upstream supply port is a downstream first supply port and a more downstream supply port is a downstream second supply port) It is more preferable to use a twin-screw extruder equipped with
- (A) a polyamide resin and, if necessary, (D) a heat stabilizer and other additives are supplied from the upstream supply port, and (B) a glass chopped strand is used as the glass fiber. More preferably, (B) the glass fiber is supplied from the downstream first supply port, and (C) the copolymer is supplied from the downstream second supply port.
- the “grafted polyamide resin” is present at the interface between the polyamide resin and the (B) glass fiber in the polyamide resin composition of the present embodiment, and the resin and the glass fiber are melted and kneaded. It is formed at the interface.
- the amount of the grafted polyamide resin (hereinafter also referred to as grafting amount) can be adjusted by extrusion conditions (temperature, screw design, etc.), polyamide resin (molecular weight, end group concentration), glass fiber surface treatment, and the like. In the present embodiment, the adjustment method is not limited.
- Specific examples of the method for increasing the amount of “grafted polyamide resin” are not limited to the following, but (C) before adding the copolymer, an appropriate amount of carboxylic acid anhydride-containing unsaturated vinyl monomer.
- An example is a method in which (B) glass fiber having a monomeric compound on at least a part of the surface thereof is melt-kneaded with (A) a polyamide resin.
- grafted polyamide resin tends to improve vibration fatigue resistance and mechanical properties at high temperatures (80 ° C. or higher and (A) the melting point of the polyamide resin or lower).
- the grafted polyamide resin present at the interface between the polyamide resin and the glass fiber is obtained by immersing the polyamide resin pellet or the molded product in the polyamide resin solvent so as to elute the polyamide resin and precipitate the glass fiber.
- An organic substance that does not elute in the solvent and remains on the surface of the glass fiber, which is mainly composed of a polyamide resin, can be confirmed by infrared absorption spectrum and pyrolysis gas chromatographic analysis. Note that “having a polyamide resin as a main component” means that the presence of a polyamide resin component is clearly confirmed in each analysis method.
- glass fiber reinforced polyamide 66 resin will be described as an example.
- glass fiber reinforced polyamide 66 resin pellets or glass fibers in a molded product are mixed with phenol in order to separate ungrafted polyamide 66 resin.
- the polyamide 66-phenol solution part is removed, and the remaining glass fiber part is washed several times with phenol until the polyamide 66 does not elute, and then washed several times with ethanol to remove phenol, and then the ethanol is dried. Remove.
- glass fiber grafted with organic matter is also referred to as grafted glass fiber below.
- this grafted organic substance can be confirmed to be mainly composed of polyamide 66 resin.
- the amount of grafted polyamide resin (grafted amount) present at the interface between the polyamide resin and glass fiber is measured according to JIS R3420 (loss on ignition) of the grafted glass fiber taken out as described above. And can be determined from the amount of mass reduction.
- the amount of the grafted polyamide resin present at this interface is preferably 0.15 to 2 parts by weight, more preferably 0.2 to 2 parts by weight, and still more preferably 0.2 to 1 part by weight with respect to 100 parts by weight of the glass fiber. 0.7 parts by mass.
- the grafting amount is 0.15 parts by mass or more, the glass fiber surface can be sufficiently covered, and the vibration fatigue resistance of the molded product obtained from the pellet tends to be sufficiently developed.
- it is 2 mass parts or less, it exists in the tendency which can prevent the fall of melt fluidity thru
- the polyamide resin in the polyamide composition satisfies the carboxyl terminal amount / amino terminal amount ⁇ 1.
- the polyamide resin coexisting with other components in the polyamide resin composition of the present embodiment satisfies the above relationship.
- the polyamide resin composition of the present embodiment includes a carboxylic acid anhydride-containing unsaturated vinyl monomer and a (C) copolymer having a glass transition temperature Tg exceeding 0 ° C. and a carboxylic acid anhydride-containing unsaturated material.
- It contains (B) glass fiber having a vinyl monomer compound on at least a part of the glass fiber surface, and the carboxylic acid anhydride functional group contained therein reacts with the amino terminal of the (A) polyamide resin as a raw material. sell.
- the carboxylic acid anhydride functional group reacts more with the amino terminus of the (A) polyamide resin as a raw material, the effect of the present embodiment in that vibration fatigue resistance is improved tends to be obtained more greatly.
- the amino terminal of the polyamide resin is decreased.
- the effect of the present embodiment that the vibration fatigue resistance is improved is improved by the reaction of the carboxylic acid anhydride functional group and the amino terminal of the polyamide resin until the amount of carboxyl terminal / amino terminal is ⁇ 1 in the polyamide resin composition. There is a tendency to obtain greatly.
- the carboxyl end amount (end group concentration) and amino end amount (end group concentration) can be determined, for example, by 1 H-NMR measurement at 60 ° C. using a bisulfate solvent. That is, it can be calculated by determining the integrated values of the peaks corresponding to the amino group terminal and the carboxyl group terminal obtained by the NMR measurement.
- the molded body of the present embodiment includes the polyamide resin composition according to the above-described embodiment. Although it does not specifically limit, For example, it can be set as the molded object of the various components by injection molding of the polyamide resin composition which concerns on said embodiment. And, the molded body in the present embodiment is not particularly limited, for example, applied to various parts such as for automobiles, machine industry, electric / electronic, industrial materials, industrial materials, daily / household goods, etc. can do. Thus, the molded body of the present embodiment can impart excellent vibration fatigue resistance to the various parts.
- the polyamide resin composition according to this embodiment is particularly suitable for automotive parts because of its excellent vibration fatigue resistance.
- the present embodiment will be described in more detail based on examples and comparative examples, but the present embodiment is not limited to these examples.
- the measuring method for evaluating the sample which concerns on an Example and a comparative example is as follows.
- End group concentration The end group concentration was determined by 1 H-NMR measurement at 60 ° C. using a bisulfate solvent. As a measuring device at this time, ECA500 manufactured by JEOL Ltd. was used. That is, the terminal group concentration was calculated from the integrated value of the corresponding peak of the amino terminal group and carboxyl terminal group of (A) polyamide resin in each example.
- Weight average molecular weight The weight average molecular weight of the (C) copolymer in each example was determined by measuring with GPC (gel permeation chromatography).
- Tg The Tg of the copolymer (C) in each example was determined by measuring with a temperature increase rate of 20 ° C./min using Diamond-DSC manufactured by PERKIN-ELMER in accordance with JIS-K7121.
- the acid value of the (C) copolymer in each example is measured in accordance with JIS K0070, and the number of mg of potassium hydroxide required to neutralize the acid present in 1 g of the (C) copolymer is measured.
- the acid value of the (C) copolymer in each example is measured in accordance with JIS K0070, and the number of mg of potassium hydroxide required to neutralize the acid present in 1 g of the (C) copolymer is measured.
- the thermal weight loss rate of the glass fiber was determined with a thermogravimetric analysis (TGA) device, and the amount of sizing agent attached to the glass fiber was measured.
- TGA-50 manufactured by Shimadzu Corporation
- TGA-50 was used as the TGA apparatus, and as the temperature condition, the temperature was raised from 30 ° C. to 550 ° C. at 20 ° C./min and held at 550 ° C. for 1 hour.
- Measurement condition 1 When the stress applied to the sample was set to 76 MPa, the number of vibrations until the sample reached breakage was determined.
- Measurement condition 2 When the stress applied to the sample was set to 66 MPa, the number of vibrations until the sample was broken was obtained.
- the multipurpose test piece (A type) molded as described above was completely immersed in distilled water and allowed to absorb water at 80 ° C. for 48 hours. Then, after cooling at 23 degreeC for 24 hours or more, the test piece was taken out from distilled water, the tensile test was performed at a tensile rate of 5 mm / min according to ISO 527, and each tensile strength (MPa) was measured. By this method, the tensile strength after water absorption was determined.
- the multipurpose test piece (A type) molded as described above was heat-aged at 120 ° C. in a hot air circulation oven. After lapse of 5000 hours, the product was taken out from the oven, cooled at 23 ° C. for 24 hours or more, and then subjected to a tensile test at a tensile speed of 5 mm / min in accordance with ISO 527 to measure each tensile strength (MPa).
- the grafted polyamide resin-attached glass fiber thus obtained was measured according to JIS R3420 to determine the amount of grafted polyamide resin. That is, 1 g or more of the grafted polyamide resin-attached glass fiber was taken and its mass was measured. Next, after drying at 110 ⁇ 5 ° C. for 1 hour or longer, it was placed in a desiccator and allowed to cool to room temperature, and its mass (m1) was measured. This was heated up to a constant weight (15 minutes) in an electric furnace maintained at 625 ⁇ 20 ° C., then taken out, placed in a desiccator and allowed to cool to room temperature, and its mass (m 2) was measured.
- ⁇ Raw material> [Polyamide resin A-1 (PA66)] 30 kg of an aqueous solution of an equimolar salt of 50% by mass of hexamethylenediamine and adipic acid was prepared and sufficiently stirred.
- the aqueous solution of the raw material of the polyamide 66 was charged into a 70 L autoclave having a stirrer and an extraction nozzle at the bottom. Thereafter, the mixture was sufficiently stirred at a temperature of 50 ° C. Next, the atmosphere was replaced with nitrogen, and then the temperature was raised from 50 ° C. to about 270 ° C. with stirring.
- the pressure in the autoclave approached about 1.77 MPa in terms of gauge pressure, but heating was continued for about 1 hour while removing water from the system so that the pressure did not exceed 1.77 MPa. Thereafter, the pressure was reduced to atmospheric pressure over about 1 hour, and further maintained at about 270 ° C. and atmospheric pressure for about 1 hour, and then stirring was stopped. The polymer was discharged in a strand form from the lower nozzle, and water cooling and cutting were performed to obtain pellets.
- the 98% sulfuric acid relative viscosity of the polyamide resin A-1 was 2.8.
- the amino end group concentration was 46 ⁇ mol / g, and the carboxyl end group concentration was 72 ⁇ mol / g. That is, the amino end group concentration / carboxyl end group concentration was 0.64.
- the mold temperature was set to 80 ° C. and the cylinder temperature was set to 290 ° C.
- Polyamide resin A-2 (PA66) A polyamide resin A-2 was prepared in the same manner as the polyamide resin A-1, except that an additional 900 g of adipic acid was added to the aqueous raw material solution.
- Polyamide resin A-2 had a 98% sulfuric acid relative viscosity of 2.2.
- the amino end group concentration was 33 ⁇ mol / g, and the carboxyl end group concentration was 107 ⁇ mol / g. That is, the amino end group concentration / carboxyl end group concentration was 0.30.
- the mold temperature was set to 80 ° C. and the cylinder temperature was set to 290 ° C.
- Polyamide resin A-3 (PA66) A polyamide resin A-3 was produced by the same production method as for the polyamide resin A-1, except that an additional 900 g of hexamethylenediamine was added to the raw material aqueous solution.
- Polyamide resin A-3 had a 98% sulfuric acid relative viscosity of 2.4.
- the amino end group concentration was 78 ⁇ mol / g, and the carboxyl end group concentration was 52 ⁇ mol / g. That is, the amino end group concentration / carboxyl end group concentration was 1.50.
- the mold temperature was set to 80 ° C. and the cylinder temperature was set to 290 ° C.
- Polyamide resin A-4 (PA66)
- the polyamide resin A-1 pellets were placed in a vessel equipped with a stirrer and purged with nitrogen, followed by solid phase polymerization with stirring at 210 ° C. for 15 hours.
- Polyamide resin A-4 had a 98% sulfuric acid relative viscosity of 3.8.
- the amino end group concentration was 20 ⁇ mol / g, and the carboxyl end group concentration was 52 ⁇ mol / g. That is, the amino end group concentration / carboxyl end group concentration was 0.38.
- the mold temperature was set to 80 ° C. and the cylinder temperature was set to 290 ° C.
- PA66 / 6T was produced according to the production example of JP-T-2013-501094.
- Polyamide resin A-4 had a 98% sulfuric acid relative viscosity of 2.9.
- the amino end group concentration was 42 ⁇ mol / g, and the carboxyl end group concentration was 65 ⁇ mol / g. That is, the amino end group concentration / carboxyl end group concentration was 0.64.
- the mold temperature was set to 80 ° C. and the cylinder temperature was set to 290 ° C.
- PA9T Polyamide resin A-6 (PA9T)] PA9T was produced according to the production example of JP2013-40346A.
- Polyamide resin A-6 had a 98% sulfuric acid relative viscosity of 2.9.
- the amino end group concentration was 42 ⁇ mol / g, and the carboxyl end group concentration was 52 ⁇ mol / g. That is, the amino end group concentration / carboxyl end group concentration was 0.80.
- the mold temperature was set to 120 ° C.
- the cylinder temperature was set to 330 ° C.
- PA610 Polyamide resin A-7 (PA610)
- PA610 was produced according to the production example of JP2011-148997A.
- Polyamide resin A-5 had a 98% sulfuric acid relative viscosity of 2.3.
- the amino end group concentration was 58 ⁇ mol / g, and the carboxyl end group concentration was 79 ⁇ mol / g. That is, the amino end group concentration / carboxyl end group concentration was 0.73.
- the mold temperature was set to 80 ° C.
- the cylinder temperature was set to 260 ° C.
- Glass fiber B-1 In terms of solid content, 2% by mass of polyurethane resin (trade name: Bondic (registered trademark) 1050, aqueous solution having a solid content of 50% by mass (manufactured by Dainippon Ink Co., Ltd.)), ethylene-maleic anhydride copolymer described below Compound C-1 8% by mass, ⁇ -aminopropyltriethoxysilane 0.6% by mass (trade name: KBE-903, manufactured by Shin-Etsu Chemical Co., Ltd.), lubricant 0.1% by mass [trade name: Carnauba wax (manufactured by Kato Yoko Co., Ltd.)] was diluted with water to adjust the total mass to 100% by mass to obtain a glass fiber sizing agent.
- Bondic registered trademark
- ethylene-maleic anhydride copolymer described below Compound C-1 8% by mass, ⁇ -aminopropyltriethoxysilane 0.6% by mass
- KBE-903
- the above-mentioned glass fiber sizing agent was adhered to the melt-proofed glass fiber having an average diameter of 10 ⁇ m. That is, the glass fiber sizing agent was applied to the glass fiber being wound around the rotating drum by using an applicator installed at a predetermined position. Next, this was dried to obtain a roving (glass roving) of a glass fiber bundle surface-treated with the glass fiber sizing agent. At that time, the glass fiber was made to be a bundle of 1,000 pieces. The adhesion amount of the glass fiber sizing agent was 0.6% by mass. This was cut into a length of 3 mm to obtain a glass chopped strand.
- Glass fiber B-2 In terms of solid content, polyurethane resin 2% by mass (trade name: Bondic (registered trademark) 1050, aqueous solution having a solid content of 50% by mass (manufactured by Dainippon Ink Co., Ltd.)), ethylene-maleic anhydride copolymer (poly Science) 4% by mass, polyethyl acrylate (manufactured by Thermo Fisher Scientific) 4% by mass, ⁇ -aminopropyltriethoxysilane 0.6% by mass (trade name: KBE-903 (manufactured by Shin-Etsu Chemical Co., Ltd.)), It diluted with water so that it might become a lubricant 0.1 mass% (brand name: Carnauba wax (product made from Hiroyuki Kato)), the total mass was adjusted to 100 mass%, and the glass fiber sizing agent was obtained. Glass fiber B-2 was obtained in the same manner as glass fiber B-1, except that the glass fiber sizing
- Glass fiber B-3 In terms of solid content, polyurethane resin 2% by mass (trade name: Bondic (registered trademark) 1050, aqueous solution having a solid content of 50% by mass (manufactured by Dainippon Ink Co., Ltd.)), ⁇ -aminopropyltriethoxysilane 0.6 Dilute with water to a mass% (trade name: KBE-903, (manufactured by Shin-Etsu Chemical Co., Ltd.)) and 0.1 mass% lubricant (brand name: carnauba wax (manufactured by Hiroyuki Kato)). The total mass was adjusted to 100% by mass to obtain a glass fiber sizing agent. Glass fiber B-3 was obtained in the same manner as glass fiber B-1, except that the glass fiber sizing agent was used. The adhesion amount of the glass fiber sizing agent was 0.6% by mass.
- Glass fiber B-4 Glass fibers having an average diameter of 7 ⁇ m were used in the same manner as glass fibers B-1.
- Glass fiber B-5 Glass fibers having an average diameter of 13 ⁇ m were used in the same manner as glass fibers B-1.
- Glass fiber B-6 In terms of solid content, 2% by mass of polyurethane resin (trade name: Bondic (registered trademark) 1050, aqueous solution having a solid content of 50% by mass (manufactured by Dainippon Ink Co., Ltd.)), ethylene-maleic anhydride copolymer described below Compound C-1 8% by mass, ⁇ -aminopropyltriethoxysilane 0.6% by mass (trade name: KBE-903, manufactured by Shin-Etsu Chemical Co., Ltd.), lubricant 0.1% by mass [trade name: Carnauba wax (manufactured by Kato Yoko Co., Ltd.)] was diluted with water to adjust the total mass to 100% by mass to obtain a glass fiber sizing agent.
- Bondic registered trademark
- ethylene-maleic anhydride copolymer described below Compound C-1 8% by mass, ⁇ -aminopropyltriethoxysilane 0.6% by mass
- KBE-903
- the above-mentioned glass fiber sizing agent was adhered to the melt-proofed glass fiber having an average diameter of 10 ⁇ m. That is, the glass fiber sizing agent was applied to the glass fiber being wound around the rotating drum by using an applicator installed at a predetermined position. Next, this was dried to obtain a roving (glass roving) of a glass fiber bundle surface-treated with the glass fiber sizing agent. At that time, the glass fiber was made to be a bundle of 1,000 pieces. The adhesion amount of the glass fiber sizing agent was 0.6% by mass. This was cut into a length of 4.5 mm to obtain a glass chopped strand.
- Copper-based heat stabilizer Copper iodide (CuI) (trade name, manufactured by Wako Pure Chemical Industries, Ltd.) 100 g and potassium iodide (KI) (trade name, manufactured by Wako Pure Chemical Industries, Ltd.) A mixture of 440 g of potassium iodide) was used.
- CuI Copper iodide
- KI potassium iodide
- Copper heat stabilizer Copper iodide (CuI) (trade name, manufactured by Wako Pure Chemical Industries, Ltd.) 100 g and potassium bromide (KBr) (product name, manufactured by Wako Pure Chemical Industries, Ltd.) A mixture of 315 g of potassium bromide) was used.
- CuI Copper iodide
- KBr potassium bromide
- ZSK-26MC manufactured by Coperion (Germany)
- Examples 2 to 24, Comparative Examples 1 to 3 Except that the types and contents of (A) polyamide resin, (B) glass fiber, (C) copolymer, and (D) heat stabilizer were changed as shown in Tables 1 to 4, the same as in Example 1 The pellets and test pieces of Examples 2 to 24 and Comparative Examples 1 to 3 were prepared and used for each test.
- ZSK-26MC manufactured by Coperion (Germany)
- the glass fiber reinforced thermoplastic polyamide resin composition according to the present invention is industrially used as a material for molded articles that require high-level durability, particularly vibration fatigue resistance, such as automobile parts and electronic parts (connectors, switches). There is a possibility of use.
Abstract
Description
[1]
(A)ポリアミド樹脂と、
表面の少なくとも一部にカルボン酸無水物含有不飽和ビニル単量体の化合物を有する(B)ガラス繊維と、
カルボン酸無水物含有不飽和ビニル単量体を含み、かつ、ガラス転移温度Tgが0℃を超える(C)共重合体と、
を含有する、ポリアミド樹脂組成物。
[2]
前記ポリアミド樹脂組成物中において、ポリアミド樹脂と(B)ガラス繊維との界面にグラフト化ポリアミド樹脂が存在し、当該グラフト化ポリアミド樹脂量が(B)ガラス繊維100質量部に対して0.15~2質量部である、[1]に記載のポリアミド樹脂組成物。
[3]
23℃における引張強度に対し、80℃における引張強度が70%以上である、[1]又は[2]に記載のポリアミド樹脂組成物。
[4]
前記ポリアミド樹脂組成物中におけるポリアミド樹脂が、カルボキシル末端量/アミノ末端量≧1を満たす、[1]~[3]のいずれかに記載のポリアミド樹脂組成物。
[5]
前記(B)ガラス繊維が、前記(A)ポリアミド樹脂100質量部に対して5質量部以上200質量部以下で含有され、かつ、前記(C)共重合体が前記(A)ポリアミド樹脂100質量部に対して0.01質量部以上2質量部以下で含有される、[1]~[4]のいずれかに記載のポリアミド樹脂組成物。
[6]
前記(C)共重合体の重量平均分子量が、60万以下である、[1]~[5]のいずれか記載のポリアミド樹脂組成物。
[7]
前記(C)共重合体の酸価が、0.1以上である、[1]~[6]のいずれかに記載のポリアミド樹脂組成物。
[8]
前記(A)ポリアミド樹脂が、ポリアミド46(ポリテトラメチレンアジパミド)、ポリアミド66(ポリヘキサメチレンアジパミド)、ポリアミド610、ポリアミド612、ポリアミド6T(ポリヘキサメチレンテレフタルアミド)、ポリアミド9T(ポリノナンメチレンテレフタルアミド)、ポリアミド6I(ポリヘキサメチレンイソフタルアミド)及びポリアミドMXD6(ポリメタキシリレンアジパミド)並びにこれらを構成成分として含む共重合ポリアミドからなる群より選択される少なくとも1つを含む、[1]~[7]のいずれかに記載のポリアミド樹脂組成物。
[9]
(D)熱安定剤をさらに含有する、[1]~[8]のいずれかに記載のポリアミド樹脂組成物。
[10]
前記(D)熱安定剤が、銅を含有する、[9]に記載のポリアミド樹脂組成物。
[11]
前記(B)ガラス繊維が、実質的に2.8mm~3.2mmにカットされたチョップドストランドである、[1]~[10]のいずれかに記載のポリアミド樹脂組成物。
[12]
前記(A)ポリアミド樹脂と(B)ガラス繊維とを溶融混練した後に、前記(C)共重合体を添加してさらに溶融混練して得られる、[1]~[11]のいずれかに記載のポリアミド樹脂組成物。
[13]
[1]~[12]のいずれかに記載のポリアミド樹脂組成物を含む、成形体。
[14]
[1]~[13]のいずれかに記載のポリアミド樹脂組成物を含む、自動車用部品。
[15]
(A)ポリアミド樹脂と、表面の少なくとも一部にカルボン酸無水物含有不飽和ビニル単量体の化合物を有する(B)ガラス繊維と、を溶融混練する工程(a)と、
前記工程(a)の後に、カルボン酸無水物含有不飽和ビニル単量体を含み、かつ、ガラス転移温度Tgが0℃を超える(C)共重合体を添加してさらに溶融混練する工程(b)と、
を含む、ポリアミド樹脂組成物の製造方法。
本実施形態のポリアミド樹脂組成物は、(A)ポリアミド樹脂と、表面の少なくとも一部にカルボン酸無水物含有不飽和ビニル単量体の化合物を有する(B)ガラス繊維と、カルボン酸無水物含有不飽和ビニル単量体を含み、かつ、ガラス転移温度Tgが0℃を超える(C)共重合体と、を含有する。このように、所望の材料で構成されているため、本実施形態のポリアミド樹脂組成物は、優れた耐久性、とりわけ耐振動疲労特性を発揮することができる。
「ポリアミド樹脂」とは、主鎖に-CO-NH-(アミド)結合を有する高分子化合物を意味する。なお、本明細書において、本実施形態のポリアミド樹脂組成物を構成する原料としてのポリアミド樹脂のことを指し、特に符号を付して「(A)ポリアミド樹脂」と表記する場合がある。一方、本実施形態のポリアミド樹脂組成物におけるポリアミド樹脂(すなわち、本実施形態のポリアミド樹脂組成物中で他の構成要素と共存する状態のポリアミド樹脂)については特に符号を付さず、単に「ポリアミド樹脂」と表記する。本実施形態における(A)ポリアミド樹脂としては、例えば、(a)ラクタムの開環重合で得られるポリアミド、(b)ω-アミノカルボン酸の自己縮合で得られるポリアミド、(c)ジアミン及びジカルボン酸を縮合することで得られるポリアミド、並びにこれらの共重合物が挙げられるが、これらに限定されるものではない。また、本実施形態における(A)ポリアミド樹脂としては、上記した中の1種を単独で用いてもよく、2種以上の混合物として用いてもよい。
本実施形態における(B)ガラス繊維は、カルボン酸無水物含有不飽和ビニル単量体の化合物を表面の少なくとも一部に有する。本実施形態におけるカルボン酸無水物含有不飽和ビニル単量体の化合物とは、主鎖を構成する成分の少なくとも一種がカルボン酸無水物含有不飽和ビニル単量体である重合体を意味する。なお、本明細書において、「主鎖を構成する成分」とは、その成分(単量体)自身の活性基、例えばビニル基などが連続的に反応し、多量体を生成していくことで、主鎖を構成する成分のことをいう。また、本実施形態において、「表面の少なくとも一部に有する」状態は、具体的には、例えば、特定の成分をガラス繊維の表面に塗布、含浸等することによって達成されうる。(B)ガラス繊維が、カルボン酸無水物含有不飽和ビニル単量体の化合物を表面の少なくとも一部に有することは、例えばIRやNMRなどの公知の解析手法により確認することができる。
上記シランカップリング剤としては、特に限定されないが、例えば、γ-アミノプロピルトリエトキシシラン、γ-アミノプロピルトリメトキシシランやN-β-(アミノエチル)-γ-アミノプロピルメチルジメトキシシラン等のアミノシラン類;γ-メルカプトプロピルトリメトキシシランやγ-メルカプトプロピルトリエトキシシラン等のメルカプトシラン類;エポキシシラン類;ビニルシラン類が挙げられる。上記した成分から選択される1種以上であることが好ましく、アミノシラン類がより好ましい。
上記集束剤は、例えば(B)ガラス繊維を束ねる目的や、樹脂などの他の物質と(B)ガラス繊維との親和性を高めるなどの役割を果たす目的で、(B)ガラス繊維表面に塗布等される。上記塗布に際しては特に限定されず、例えば、後述する(B)ガラス繊維の調製方法に述べるような方法を採用することができる。
ガラスロービングの形態に調製する場合は、公知のガラス繊維の製造工程において、ローラー型アプリケーター等の公知の方法を用いて、上述した集束剤をガラスロービングの表面に塗布したストランドを乾燥することによって連続的に得ることができる。ガラスチョップドストランドの場合は、上記ガラスロービングを所定の長さに切断することにより得ることができる。また、ストランドの乾燥は切断工程後に行ってもよく、またはストランドを乾燥した後に切断してもよい。
本実施形態のポリアミド樹脂組成物は、カルボン酸無水物含有不飽和ビニル単量体を含み、かつ、ガラス転移温度Tgが0℃を超える(C)共重合体を含有する。カルボン酸無水物含有不飽和ビニル単量体を含むとは、(C)共重合体の主鎖を構成する成分の少なくとも一種がカルボン酸無水物含有不飽和ビニル単量体を含むという意味である。
本実施形態のポリアミド樹脂組成物は、(D)熱安定剤を含むことができる。「熱安定剤」とは、熱による劣化を抑制するために添加する安定剤であり、例えばフェノール系熱安定剤、リン系熱安定剤、アミン系熱安定剤、銅系熱安定剤などが挙げられる。すなわち、本実施形態のポリアミド樹脂組成物は、(D)熱安定剤を含有する場合、より熱による劣化を抑制することができる傾向にある。なお、本実施形態において、(D)熱安定剤の含有量は特に限定されないが、熱による劣化の効果的な抑制、着色の防止、機械物性の保持などの観点から0.001質量部~5質量部の範囲で含有されていることが好ましい。
上記した成分の他に、本実施形態の効果を損なわない範囲で、必要に応じてさらに他の成分を添加してもよい。上記他の成分としては、特に限定されないが、例えば、ガラス繊維以外の無機充填材、酸化防止剤、紫外線吸収剤、熱安定剤、光劣化防止剤、可塑剤、滑剤、離型剤、核剤、難燃剤、着色剤、染色剤や顔料等を添加してもよいし、他の熱可塑性樹脂を混合してもよい。ここで、上記他の成分はそれぞれ性質が大きく異なるため、各成分についての、本実施形態の効果をほとんど損なわない好適な含有率は様々であり、各々適宜設定することができる。
本実施形態において、ポリアミド樹脂組成物を製造する方法としては、特に限定されないが、(A)ポリアミド樹脂と、(B)ガラス繊維と、(C)共重合体と、所望のその他の成分を混合し、所定の単軸又は多軸押出機を用いて混練する方法を挙げることができる。具体的には、(B)ガラス繊維としてガラスチョップドストランドを用いる場合、上流側供給口と下流側供給口とを備えた二軸押出機を使用し、上流側供給口から熱可塑性樹脂を供給して溶融させた後、下流側供給口からガラスチョップドストランドを供給して溶融混練する方法を用いることが好ましい。また、ガラスロービングを用いる場合も、公知の方法で複合することができる。
「グラフト化ポリアミド樹脂」は、本実施形態のポリアミド樹脂組成物中におけるポリアミド樹脂と(B)ガラス繊維との界面に存在し、ポリアミド樹脂とガラス繊維とを溶融混練することにより樹脂とガラス繊維の界面に形成させるものである。そのグラフト化ポリアミド樹脂の量(以下、グラフト化量ともいう)は、押出条件(温度、スクリューデザイン等)、ポリアミド樹脂(分子量、末端基濃度)、ガラス繊維の表面処理等で調整できる。本実施形態においては、上記調整方法は限定されない。
本実施形態の成形体は、上記の実施形態に係るポリアミド樹脂組成物を含むものである。特に限定されないが、例えば、上記の実施形態に係るポリアミド樹脂組成物の射出成形による各種部品の成形体とすることができる。そして、本実施形態における上記成形体は、特に限定されないが、例えば、自動車用、機械工業用、電気・電子用、産業資材用、工業材料用、日用・家庭品用等の各種部品に適用することができる。このように、本実施形態の成形体は、上記各種部品に優れた耐振動疲労特性を付与することができる。
[98%硫酸相対粘度(ηr)]
後述する各実施例及び比較例(以下、単に「各例」ともいう)における(A)ポリアミド樹脂の98%硫酸相対粘度(ηr)は、JISK6920に従って測定した。
末端基濃度は、重硫酸溶媒を用いて、60℃での1H-NMR測定により求めた。この際の測定装置としては、日本電子(株)製のECA500を用いた。すなわち、各例における(A)ポリアミド樹脂のアミノ末端基、カルボキシル末端基の対応ピークの積分値から末端基濃度を算出した。
各例における(C)共重合体の質量平均分子量は、GPC(ゲルパーミエーションクロマトグラフィー)で測定することにより求めた。
各例における(C)共重合体のTgは、JIS-K7121に準拠し、PERKIN-ELMER社製Diamond-DSCを用いて、昇温速度20℃/minで測定することにより求めた。
各例における(C)共重合体の酸価を、JIS K0070に準拠し、(C)共重合体1g中に存在する、酸を中和するのに必要な水酸化カリウムのmg数を測定することにより求めた。
各例において、熱重量分析(TGA)装置でガラス繊維の熱減量率を求め、ガラス繊維に対する集束剤の付着量を測定した。TGA装置はTGA-50(島津製作所(株)製)を用い、温度条件としては30℃から550℃まで20℃/minで昇温後、550℃で1時間保持した。
各例で得られたポリアミド樹脂組成物のペレットを成形するべく、射出成形機(PS-40E:日精樹脂株式会社製)において、射出+保圧時間を10秒とし、冷却時間を7秒とし、後述の実施例に記載した金型温度とシリンダー温度にそれぞれ設定した。このようにしてISO 294-1に準拠して作成したJISK7139小型ISO試験片(3mm厚)を対象とし、島津製作所(株)製の島津サーボパルサー(EHF-FV10KN-10LA)を使用して耐振動疲労試験を行った。その際の条件は、周波数:20Hz、波形:正弦波、温度:120℃、応力比:0.1、チャック間距離:30mmとした。さらに、下記2種類の測定条件を設定した。
測定条件1:試料にかかる応力を76MPaに設定した場合において、当該試料が破断にいたるまでの振動回数を求めた。
測定条件2:試料にかかる応力を66MPaに設定した場合において、当該試料が破断にいたるまでの振動回数を求めた。
各例で得られたポリアミド組成物のペレットを成形するべく、射出成形機(PS-40E:日精樹脂株式会社製)において、射出+保圧時間を25秒とし、冷却時間を15秒とし、後述の実施例に記載した金型温度とシリンダー温度にそれぞれ設定した。このようにして、ISO 3167に準拠しつつ、多目的試験片A型の成形片を成形した。上記の多目的試験片(A型)を、23℃、80℃又は120℃において、ISO 527に準拠し、引張速度5mm/分で引張試験を行い、引張強度を測定した。なお、引張強度は破断点強度とした。この際の測定装置としては、島津製作所(株)製のオートグラフ AG-Iを用いた。
各例に対応する試験片のb値を、日本電色社製色差計ZE-2000を用いて反射法により測定した。
JIS K7111-1に準拠し、各例に対応する成形片(ノッチ付き)のシャルピー衝撃強度測定を行った。
各例で得られたポリアミド組成物のペレットを成形するべく、射出成形機(PS-40E:日精樹脂株式会社製)において、射出+保圧時間を25秒とし、冷却時間を15秒とし、後述の実施例に記載した金型温度とシリンダー温度にそれぞれ設定した。このようにして、ISO 3167に準拠しつつ、多目的試験片A型の成形片を成形した。上記の多目的試験片(A型)を、23℃において、JIS K7171に準拠し、各例に対応する成形片の、曲げ強度測定を行った。
射出成形機(PS-40E:日精樹脂株式会社製)を用いて、ISO 3167に準拠しつつ、後述する実施例及び比較例で製造したポリアミド樹脂組成物のペレットから多目的試験片(A型)の成形片を成形した。その際、射出及び保圧の時間25秒、冷却時間15秒に設定した。また、金型温度とシリンダー温度は、後述する(A)ポリアミド樹脂の製造例に記載した温度に設定した。
目視により、外観の平滑性を評価した。より良い外観を持つものから、良好、良、悪い、の順に評価した。
射出成形機(PS-40E:日精樹脂株式会社製)を用いて、ISO 3167に準拠しつつ、後述する実施例及び比較例で製造したポリアミド樹脂組成物のペレットから多目的試験片(A型)の成形片を成形した。その際、射出及び保圧の時間25秒、冷却時間15秒に設定した。また、金型温度とシリンダー温度は、それぞれ、後述する(A)ポリアミド樹脂の製造例に記載した温度に設定した。
120℃、5000時間の熱エージング後の引張強度保持率は、下記式により算出した。
120℃、5000時間の熱エージング後の引張強度保持率=(120℃、5000時間の熱エージング後の引張強度/23℃引張強度)×100[%]
ポリアミド樹脂ペレットまたはその成形品約5gを90%フェノール100mLと混合した(40℃、2時間攪拌)。この混合物を静置することでガラス繊維部分を沈殿させ、上澄みのポリアミド-フェノール溶液を除去した。残ったガラス繊維部分に90%フェノール100mLを加えてガラス繊維部分を洗浄した(40℃、2時間攪拌)。洗浄後、静置することでガラス繊維部分を沈殿させ、上澄みの溶液を除去した。この操作を3回繰り返した。次いで、99.5%エタノール100mLを加えてフェノールを取り除いた(40℃、2時間攪拌)。その後、静置することでガラス繊維部分を沈殿させ、上澄みの溶液を除去した。この操作を3回繰り返した後、エタノールを除去するために窒素フロー乾燥機で80℃、2昼夜乾燥した。
グラフト化ポリアミド樹脂量={(m1-m2 )/m2 }×100
[ポリアミド樹脂A-1(PA66)]
50質量%のヘキサメチレンジアミンとアジピン酸との等モル塩の水溶液を30kg作製し、十分撹拌した。当該ポリアミド66の原料の水溶液を、撹拌装置を有し、かつ、下部に抜出しノズルを有する70Lのオートクレーブ中に仕込んだ。その後、50℃の温度下で十分攪拌した。次いで、窒素で雰囲気置換した後、撹拌しながら温度を50℃から約270℃まで昇温した。この際、オートクレーブ内の圧力は、ゲージ圧にして約1.77MPaに近づくが、圧力が1.77MPa以上にならないように水を系外に除去しながら加熱を約1時間続けた。その後、約1時間をかけ、圧力を大気圧まで降圧し、さらに約270℃、大気圧で約1時間保持した後、撹拌を停止した。下部ノズルからストランド状にポリマーを排出し、水冷・カッティングを行い、ペレットを得た。
原料の水溶液にアジピン酸を900g追加で添加したことを除き、ポリアミド樹脂A-1と同様の作成方法によりポリアミド樹脂A-2を作成した。ポリアミド樹脂A-2の98%硫酸相対粘度は2.2であった。また、アミノ末端基濃度は33μmol/gであり、カルボキシル末端基濃度は107μmol/gであった。すなわち、アミノ末端基濃度/カルボキシル末端基濃度は0.30であった。なお、ポリアミド樹脂A-2の成形においては、金型温度を80℃、シリンダー温度を290℃に設定した。
原料の水溶液にヘキサメチレンジアミンを900g追加で添加したことを除き、ポリアミド樹脂A-1と同様の作成方法によりポリアミド樹脂A-3を作成した。ポリアミド樹脂A-3の98%硫酸相対粘度は2.4であった。また、アミノ末端基濃度は78μmol/gであり、カルボキシル末端基濃度は52μmol/gであった。すなわち、アミノ末端基濃度/カルボキシル末端基濃度は1.50であった。なお、ポリアミド樹脂A-3の成形においては、金型温度を80℃、シリンダー温度を290℃に設定した。
ポリアミド樹脂A-1のペレットを、攪拌機付容器に入れ、窒素置換した後に、210℃で15時間、撹拌しながら固相重合を行った。ポリアミド樹脂A-4の98%硫酸相対粘度は3.8であった。また、アミノ末端基濃度は20μmol/gであり、カルボキシル末端基濃度は52μmol/gであった。すなわち、アミノ末端基濃度/カルボキシル末端基濃度は0.38であった。なお、ポリアミド樹脂A-4の成形においては、金型温度を80℃、シリンダー温度を290℃に設定した。
特表2013-501094の製造例に従い、PA66/6Tを作成した。ポリアミド樹脂A-4の98%硫酸相対粘度は2.9であった。また、アミノ末端基濃度は42μmol/gであり、カルボキシル末端基濃度は65μmol/gであった。すなわち、アミノ末端基濃度/カルボキシル末端基濃度は0.64であった。なお、ポリアミド樹脂A-4の成形においては、金型温度を80℃、シリンダー温度を290℃に設定した。
特開2013-40346の製造例に従い、PA9Tを作成した。ポリアミド樹脂A-6の98%硫酸相対粘度は2.9であった。また、アミノ末端基濃度は42μmol/gであり、カルボキシル末端基濃度は52μmol/gであった。すなわち、アミノ末端基濃度/カルボキシル末端基濃度は0.80であった。なお、ポリアミド樹脂A-6の成形においては、金型温度を120℃、シリンダー温度を330℃に設定した。
特開2011-148997の製造例に従い、PA610を作成した。ポリアミド樹脂A-5の98%硫酸相対粘度は2.3であった。また、アミノ末端基濃度は58μmol/gであり、カルボキシル末端基濃度は79μmol/gであった。すなわち、アミノ末端基濃度/カルボキシル末端基濃度は0.73であった。なお、ポリアミド樹脂A-5の成形においては、金型温度を80℃、シリンダー温度を260℃に設定した。
固形分換算で、ポリウレタン樹脂を2質量%(商品名:ボンディック(登録商標)1050、固形分率50質量%の水溶液(大日本インキ株式会社製))、後述のエチレン-無水マレイン酸共重合体C-1を8質量%、γ-アミノプロピルトリエトキシシランを0.6質量%(商品名:KBE-903、(信越化学工業株式会社製]、潤滑剤0.1質量%[商品名:カルナウバワックス(株式会社加藤洋行製)]となるように水で希釈し、全質量を100質量%に調整し、ガラス繊維集束剤を得た。
固形分換算で、ポリウレタン樹脂2質量%(商品名:ボンディック(登録商標)1050、固形分率50質量%の水溶液(大日本インキ株式会社製))、エチレン-無水マレイン酸共重合体(ポリサイエンス製)4質量%、ポリアクリル酸エチル(Thermo Fisher Scientific製)4質量%、γ-アミノプロピルトリエトキシシラン0.6質量%(商品名:KBE-903(信越化学工業株式会社製))、潤滑剤0.1質量%(商品名:カルナウバワックス(株式会社加藤洋行製))となるように水で希釈し、全質量を100質量%に調整し、ガラス繊維集束剤を得た。上記ガラス繊維集束剤を用いたことを除き、ガラス繊維B-1と同様にしてガラス繊維B-2を得た。ガラス繊維集束剤の付着量は、0.6質量%であった。
固形分換算で、ポリウレタン樹脂2質量%(商品名:ボンディック(登録商標)1050、固形分率50質量%の水溶液(大日本インキ株式会社製))、γ-アミノプロピルトリエトキシシラン0.6質量%(商品名:KBE-903、(信越化学工業株式会社製))、潤滑剤0.1質量%(商品名:カルナウバワックス(株式会社加藤洋行製))となるように水で希釈し、全質量を100質量%に調整し、ガラス繊維集束剤を得た。上記ガラス繊維集束剤を用いたことを除き、ガラス繊維B-1と同様にしてガラス繊維B-3を得た。ガラス繊維集束剤の付着量は、0.6質量%であった。
ガラス繊維B-1と同様の方法で、平均直径7μmのガラス繊維を用いた。
ガラス繊維B-1と同様の方法で、平均直径13μmのガラス繊維を用いた。
固形分換算で、ポリウレタン樹脂を2質量%(商品名:ボンディック(登録商標)1050、固形分率50質量%の水溶液(大日本インキ株式会社製))、後述のエチレン-無水マレイン酸共重合体C-1を8質量%、γ-アミノプロピルトリエトキシシランを0.6質量%(商品名:KBE-903、(信越化学工業株式会社製]、潤滑剤0.1質量%[商品名:カルナウバワックス(株式会社加藤洋行製)]となるように水で希釈し、全質量を100質量%に調整し、ガラス繊維集束剤を得た。
重量平均分子量が6万、Tgが150℃、酸価が0.28のエチレン-無水マレイン酸共重合体を用いた。
重量平均分子量が6万、Tgが250℃、酸価が0.1のスチレン-無水マレイン酸共重合体を用いた。
重量平均分子量が6万、Tgが60℃、酸価が0.2のエチレン-無水マレイン酸含有共重合体を用いた。
重量平均分子量が6万、Tgが-60℃、酸価が0.05のエチレン-無水マレイン含有酸共重合体を用いた。
重量平均分子量が15万、Tgが150℃、酸価が0.28のエチレン-無水マレイン酸共重合体を用いた。
重量平均分子量が40万、Tgが150℃、酸価が0.28のエチレン-無水マレイン酸共重合体を用いた。
銅系熱安定剤: ヨウ化銅(CuI)(和光純薬工業(株)製 商品名 ヨウ化銅(I))100gと、ヨウ化カリウム(KI)(和光純薬工業(株)製 商品名 ヨウ化カリウム)440gの混合物を用いた。
銅系熱安定剤: ヨウ化銅(CuI)(和光純薬工業(株)製 商品名 ヨウ化銅(I))100gと、臭化カリウム(KBr)(和光純薬工業(株)製 商品名 臭化カリウム)315gの混合物を用いた。
Irganox(登録商標)1098(BASF社製)を用いた。
押出機として、二軸押出機(ZSK-26MC:コペリオン社製(ドイツ))を用いた。この二軸押出機は、上流側から1番目のバレルに上流側供給口を有し、かつ、6番目のバレルに下流側第一供給口を有し、かつ、8番目のバレルに下流側第二供給口を有するものである。そして、L/D(押出機のシリンダーの長さ/押出機のシリンダー径)=48(バレル数:12)となっている。この二軸押出機において、上流側供給口からダイまでの温度を290℃に、スクリュー回転数を300rpmに、吐出量を25kg/時間に、それぞれ設定した。かかる条件下で、下記表1の上部に記載された割合となるように、上流側供給口より(A)ポリアミド樹脂と、(D)熱安定剤を供給し、下流側第一供給口より(B)ガラス繊維を供給し、下流側第二供給口より(C)共重合体を供給し、溶融混練することで樹脂組成物のペレットを製造した。得られた樹脂組成物を成形し、その成形片を用いて、振動疲労特性、成形体外観等を評価した。
(A)ポリアミド樹脂、(B)ガラス繊維、(C)共重合体、(D)熱安定剤の種類ないし含有量を表1~4のように変更したことを除き、実施例1と同様にして実施例2~24、比較例1~3のペレット及び試験片を作成し、各試験に供した。
押出機として、二軸押出機(ZSK-26MC:コペリオン社製(ドイツ))を用いた。この二軸押出機は、上流側から1番目のバレルに上流側供給口を有し、かつ、6番目のバレルに下流側第一供給口を有し、かつ、8番目のバレルに下流側第二供給口を有するものである。そして、L/D(押出機のシリンダーの長さ/押出機のシリンダー径)=48(バレル数:12)となっている。この二軸押出機において、上流側供給口からダイまでの温度を290℃に、スクリュー回転数を300rpmに、吐出量を25kg/時間に、それぞれ設定した。かかる条件下で、下記表1の上部に記載された割合となるように、上流側供給口より(A)ポリアミド樹脂と、(C)共重合体と、(D)熱安定剤を供給し、下流側第一供給口より(B)ガラス繊維を供給し、溶融混練することで樹脂組成物のペレットを製造した。得られた樹脂組成物を成形し、その成形片を用いて、振動疲労特性、成形体外観等を評価した。
Claims (15)
- (A)ポリアミド樹脂と、
表面の少なくとも一部にカルボン酸無水物含有不飽和ビニル単量体の化合物を有する(B)ガラス繊維と、
カルボン酸無水物含有不飽和ビニル単量体を含み、かつ、ガラス転移温度Tgが0℃を超える(C)共重合体と、
を含有する、ポリアミド樹脂組成物。 - 前記ポリアミド樹脂組成物中において、ポリアミド樹脂と(B)ガラス繊維との界面にグラフト化ポリアミド樹脂が存在し、当該グラフト化ポリアミド樹脂量が(B)ガラス繊維100質量部に対して0.15~2質量部である、請求項1に記載のポリアミド樹脂組成物。
- 23℃における引張強度に対し、80℃における引張強度が70%以上である、請求項1又は2に記載のポリアミド樹脂組成物。
- 前記ポリアミド樹脂組成物中におけるポリアミド樹脂が、カルボキシル末端量/アミノ末端量≧1を満たす、請求項1~3のいずれか一項に記載のポリアミド樹脂組成物。
- 前記(B)ガラス繊維が、前記(A)ポリアミド樹脂100質量部に対して5質量部以上200質量部以下で含有され、かつ、前記(C)共重合体が前記(A)ポリアミド樹脂100質量部に対して0.01質量部以上2質量部以下で含有される、請求項1~4のいずれか一項に記載のポリアミド樹脂組成物。
- 前記(C)共重合体の重量平均分子量が、60万以下である、請求項1~5のいずれか一項に記載のポリアミド樹脂組成物。
- 前記(C)共重合体の酸価が、0.1以上である、請求項1~6のいずれか一項に記載のポリアミド樹脂組成物。
- 前記(A)ポリアミド樹脂が、ポリアミド46(ポリテトラメチレンアジパミド)、ポリアミド66(ポリヘキサメチレンアジパミド)、ポリアミド610、ポリアミド612、ポリアミド6T(ポリヘキサメチレンテレフタルアミド)、ポリアミド9T(ポリノナンメチレンテレフタルアミド)、ポリアミド6I(ポリヘキサメチレンイソフタルアミド)及びポリアミドMXD6(ポリメタキシリレンアジパミド)並びにこれらを構成成分として含む共重合ポリアミドからなる群より選択される少なくとも1つを含む、請求項1~7のいずれか一項に記載のポリアミド樹脂組成物。
- (D)熱安定剤をさらに含有する、請求項1~8のいずれか一項に記載のポリアミド樹脂組成物。
- 前記(D)熱安定剤が、銅を含有する、請求項9に記載のポリアミド樹脂組成物。
- 前記(B)ガラス繊維が、実質的に2.8mm~3.2mmにカットされたチョップドストランドである、請求項1~10のいずれか一項に記載のポリアミド樹脂組成物。
- 前記(A)ポリアミド樹脂と(B)ガラス繊維とを溶融混練した後に、前記(C)共重合体を添加してさらに溶融混練して得られる、請求項1~11のいずれか一項に記載のポリアミド樹脂組成物。
- 請求項1~12のいずれか一項に記載のポリアミド樹脂組成物を含む、成形体。
- 請求項1~13のいずれか一項に記載のポリアミド樹脂組成物を含む、自動車用部品。
- (A)ポリアミド樹脂と、表面の少なくとも一部にカルボン酸無水物含有不飽和ビニル単量体の化合物を有する(B)ガラス繊維と、を溶融混練する工程(a)と、
前記工程(a)の後に、カルボン酸無水物含有不飽和ビニル単量体を含み、かつ、ガラス転移温度Tgが0℃を超える(C)共重合体を添加してさらに溶融混練する工程(b)と、
を含む、ポリアミド樹脂組成物の製造方法。
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016124911A (ja) * | 2014-12-26 | 2016-07-11 | 三菱エンジニアリングプラスチックス株式会社 | ポリアミド樹脂組成物および成形品 |
EP3260500A4 (en) * | 2015-02-20 | 2018-01-31 | Asahi Kasei Kabushiki Kaisha | Polyamide resin composition, method for producing polyamide resin composition, and molded article |
JP2018059019A (ja) * | 2016-10-07 | 2018-04-12 | 三菱エンジニアリングプラスチックス株式会社 | 成形品および成形品の製造方法 |
JP2018095706A (ja) * | 2016-12-09 | 2018-06-21 | 三菱エンジニアリングプラスチックス株式会社 | ポリアミド樹脂組成物および成形品 |
JP2018197316A (ja) * | 2017-05-24 | 2018-12-13 | ユニチカ株式会社 | ポリアミド樹脂組成物およびそれを成形してなる成形体 |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW201811976A (zh) | 2016-08-08 | 2018-04-01 | 美商堤康那責任有限公司 | 用於散熱器之導熱聚合物組合物 |
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Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6176540A (ja) * | 1984-09-21 | 1986-04-19 | Mitsui Petrochem Ind Ltd | 自動車用プラスチツク成形品 |
JPH11226949A (ja) * | 1998-02-10 | 1999-08-24 | Asahi Chem Ind Co Ltd | ガラス繊維強化ポリアミド樹脂ペレット |
JP2002047412A (ja) * | 2000-04-14 | 2002-02-12 | Asahi Kasei Corp | ガラス繊維強化ポリアミド樹脂組成物 |
JP2004300278A (ja) * | 2003-03-31 | 2004-10-28 | Asahi Kasei Chemicals Corp | 強化ポリアミド樹脂組成物及びその成形品 |
JP2005232239A (ja) * | 2004-02-18 | 2005-09-02 | Toray Ind Inc | ポリアミド樹脂組成物およびそれからなる成形品 |
JP2005320370A (ja) * | 2004-05-06 | 2005-11-17 | Nippon Steel Corp | 樹脂組成物、樹脂シート並びに積層材料 |
JP2006291118A (ja) * | 2005-04-14 | 2006-10-26 | Asahi Kasei Chemicals Corp | 自動車冷却空調部品用ポリアミド樹脂組成物 |
JP2007031505A (ja) * | 2005-07-25 | 2007-02-08 | Asahi Kasei Chemicals Corp | 黒着色ポリアミド樹脂組成物及びその成形品 |
JP2010270327A (ja) * | 2009-04-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | ガラス繊維強化ポリアミド樹脂組成物 |
JP2011068874A (ja) * | 2009-08-25 | 2011-04-07 | Asahi Kasei Chemicals Corp | ポリアミド組成物を含む自動車部品 |
WO2012093722A1 (ja) * | 2011-01-07 | 2012-07-12 | 旭化成ケミカルズ株式会社 | 共重合ポリアミド |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8801813D0 (en) | 1988-01-27 | 1988-02-24 | Raychem Sa Nv | Adhesive composition |
DE69738284T2 (de) | 1996-07-23 | 2008-09-18 | Arkema France | Schlagzähe Polyamidzusammensetzungen |
JP3551674B2 (ja) | 1997-01-17 | 2004-08-11 | 東レ株式会社 | 溶着用ポリアミド樹脂組成物 |
JP2000319505A (ja) | 1999-05-06 | 2000-11-21 | Asahi Chem Ind Co Ltd | ポリアミド樹脂組成物およびその成形品 |
AU6511700A (en) * | 1999-08-02 | 2001-02-19 | E.I. Du Pont De Nemours And Company | An aromatic polyamide compositions for molding |
DE10117715B4 (de) * | 2000-04-14 | 2008-09-25 | Asahi Kasei Kabushiki Kaisha | Glasfaserverstärkte Polyamidharz-Zusammensetzung |
US7199188B2 (en) | 2002-05-23 | 2007-04-03 | E. I. Du Pont De Nemours And Company | Toughened thermoplastic polyamide compositions |
JP2007112877A (ja) | 2005-10-19 | 2007-05-10 | Unitika Ltd | 熱可塑性樹脂組成物及びそれからなる自動車部品成形体 |
DE102005050958A1 (de) | 2005-10-25 | 2007-04-26 | Lanxess Deutschland Gmbh | Polyamid-Formmassen mit verbesserter Fließfähigkeit |
FR2907125B1 (fr) | 2006-10-12 | 2012-09-21 | Arkema France | Composition resistant au choc a base de resine polyamide et d'un melange d'au moins un copolymere greffe a blocs polyamides et de polymere ethylenique basse densite |
JP2009209227A (ja) | 2008-03-03 | 2009-09-17 | Toyobo Co Ltd | ポリアミド樹脂組成物 |
JP5397670B2 (ja) * | 2008-09-16 | 2014-01-22 | 株式会社ニデック | 非接触式超音波眼圧計 |
JP2010269995A (ja) | 2009-04-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | ガラス繊維集束剤及びガラス繊維強化熱可塑性樹脂組成物 |
TWI529212B (zh) * | 2010-08-18 | 2016-04-11 | Vertellus Specialties Inc | 由混練聚醯胺與烯烴-順丁烯二酐聚合物所形成之組合物、方法及製品 |
-
2014
- 2014-04-16 US US14/897,017 patent/US9783677B2/en active Active
- 2014-04-16 WO PCT/JP2014/060850 patent/WO2014203606A1/ja active Application Filing
- 2014-04-16 CN CN201480032780.6A patent/CN105283508B/zh active Active
- 2014-04-16 JP JP2015522622A patent/JP6209213B2/ja active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6176540A (ja) * | 1984-09-21 | 1986-04-19 | Mitsui Petrochem Ind Ltd | 自動車用プラスチツク成形品 |
JPH11226949A (ja) * | 1998-02-10 | 1999-08-24 | Asahi Chem Ind Co Ltd | ガラス繊維強化ポリアミド樹脂ペレット |
JP2002047412A (ja) * | 2000-04-14 | 2002-02-12 | Asahi Kasei Corp | ガラス繊維強化ポリアミド樹脂組成物 |
JP2004300278A (ja) * | 2003-03-31 | 2004-10-28 | Asahi Kasei Chemicals Corp | 強化ポリアミド樹脂組成物及びその成形品 |
JP2005232239A (ja) * | 2004-02-18 | 2005-09-02 | Toray Ind Inc | ポリアミド樹脂組成物およびそれからなる成形品 |
JP2005320370A (ja) * | 2004-05-06 | 2005-11-17 | Nippon Steel Corp | 樹脂組成物、樹脂シート並びに積層材料 |
JP2006291118A (ja) * | 2005-04-14 | 2006-10-26 | Asahi Kasei Chemicals Corp | 自動車冷却空調部品用ポリアミド樹脂組成物 |
JP2007031505A (ja) * | 2005-07-25 | 2007-02-08 | Asahi Kasei Chemicals Corp | 黒着色ポリアミド樹脂組成物及びその成形品 |
JP2010270327A (ja) * | 2009-04-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | ガラス繊維強化ポリアミド樹脂組成物 |
JP2011068874A (ja) * | 2009-08-25 | 2011-04-07 | Asahi Kasei Chemicals Corp | ポリアミド組成物を含む自動車部品 |
WO2012093722A1 (ja) * | 2011-01-07 | 2012-07-12 | 旭化成ケミカルズ株式会社 | 共重合ポリアミド |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016124911A (ja) * | 2014-12-26 | 2016-07-11 | 三菱エンジニアリングプラスチックス株式会社 | ポリアミド樹脂組成物および成形品 |
JP2019002025A (ja) * | 2015-02-20 | 2019-01-10 | 旭化成株式会社 | ポリアミド樹脂組成物、ポリアミド樹脂組成物の製造方法、及び成形品 |
EP3260500A4 (en) * | 2015-02-20 | 2018-01-31 | Asahi Kasei Kabushiki Kaisha | Polyamide resin composition, method for producing polyamide resin composition, and molded article |
US10927232B2 (en) | 2015-02-20 | 2021-02-23 | Asahi Kasei Kabushiki Kaisha | Polyamide resin composition, method for producing polyamide resin composition, and molded article |
JP7194789B2 (ja) | 2016-10-07 | 2022-12-22 | 三菱エンジニアリングプラスチックス株式会社 | 成形品および成形品の製造方法 |
JP2021181579A (ja) * | 2016-10-07 | 2021-11-25 | 三菱エンジニアリングプラスチックス株式会社 | 成形品および成形品の製造方法 |
JP7014510B2 (ja) | 2016-10-07 | 2022-02-01 | 三菱エンジニアリングプラスチックス株式会社 | 成形品および成形品の製造方法 |
JP2018059019A (ja) * | 2016-10-07 | 2018-04-12 | 三菱エンジニアリングプラスチックス株式会社 | 成形品および成形品の製造方法 |
JP2023024548A (ja) * | 2016-10-07 | 2023-02-16 | 三菱エンジニアリングプラスチックス株式会社 | 成形品および成形品の製造方法 |
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JP7310089B2 (ja) | 2016-10-07 | 2023-07-19 | グローバルポリアセタール株式会社 | 成形品および成形品の製造方法 |
JP7310088B2 (ja) | 2016-10-07 | 2023-07-19 | グローバルポリアセタール株式会社 | 成形品および成形品の製造方法 |
JP2018095706A (ja) * | 2016-12-09 | 2018-06-21 | 三菱エンジニアリングプラスチックス株式会社 | ポリアミド樹脂組成物および成形品 |
JP2018197316A (ja) * | 2017-05-24 | 2018-12-13 | ユニチカ株式会社 | ポリアミド樹脂組成物およびそれを成形してなる成形体 |
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CN105283508A (zh) | 2016-01-27 |
CN105283508B (zh) | 2018-05-25 |
US20160152826A1 (en) | 2016-06-02 |
JP6209213B2 (ja) | 2017-10-04 |
US9783677B2 (en) | 2017-10-10 |
JPWO2014203606A1 (ja) | 2017-02-23 |
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