WO2015030533A1 - 카르본산 변성 니트릴계 공중합체 라텍스 조성물 및 이를 포함하는 딥 성형품 - Google Patents
카르본산 변성 니트릴계 공중합체 라텍스 조성물 및 이를 포함하는 딥 성형품 Download PDFInfo
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- WO2015030533A1 WO2015030533A1 PCT/KR2014/008095 KR2014008095W WO2015030533A1 WO 2015030533 A1 WO2015030533 A1 WO 2015030533A1 KR 2014008095 W KR2014008095 W KR 2014008095W WO 2015030533 A1 WO2015030533 A1 WO 2015030533A1
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- copolymer latex
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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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
- C08L13/00—Compositions of rubbers containing carboxyl groups
- C08L13/02—Latex
-
- 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
- C08J5/02—Direct processing of dispersions, e.g. latex, to articles
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- 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
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/18—Homopolymers or copolymers of nitriles
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
- C08L9/04—Latex
-
- 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
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2309/02—Copolymers with acrylonitrile
- C08J2309/04—Latex
Definitions
- the present invention relates to a carboxylic acid-modified nitrile copolymer latex composition and a dip molded article comprising the same.
- the present invention is to solve the problems of the prior art as described above.
- the first technical problem to be achieved by the present invention is to provide a carboxylic acid-modified nitrile copolymer latex composition capable of manufacturing a dip molded article having high tensile strength and excellent fit.
- the second technical problem to be achieved by the present invention is to provide a dip molded article comprising the carboxylic acid-modified nitrile copolymer latex composition.
- the present invention is a carboxylic acid-modified nitrile copolymer latex comprising a carboxylic acid-modified nitrile copolymer latex and a bentonite dispersion having a glass transition temperature of -30 °C to -20 °C To provide a composition.
- the present invention also provides a dip molded article comprising the carboxylic acid-modified nitrile copolymer latex composition.
- the carboxylic acid-modified nitrile copolymer latex composition according to the embodiment of the present invention includes a carboxylic acid-modified nitrile copolymer latex having a specific glass transition temperature and a bentonite dispersion, thereby making a dip molded article having high tensile strength and excellent fit. It is possible.
- the carboxylic acid-modified nitrile copolymer latex composition according to the embodiment of the present invention comprises a carboxylic acid-modified nitrile copolymer latex having a glass transition temperature (Tg) of -30 ° C to -20 ° C and a bentonite dispersion. It features.
- Tg glass transition temperature
- the carboxylic acid-modified nitrile copolymer latex composition according to an embodiment of the present invention includes a carboxylic acid-modified nitrile copolymer latex and bentonite dispersion having a glass transition temperature of -30 ° C to -20 ° C, and thus has high tensile strength. It is possible to manufacture molded articles with excellent fit.
- the carboxylic acid-modified nitrile copolymer latex composition according to an embodiment of the present invention may include the carboxylic acid-modified nitrile copolymer latex and bentonite dispersion in a weight ratio of 99: 1 to 95: 5.
- the bentonite dispersion when the bentonite dispersion is less than the weight ratio, it may be difficult to improve tensile strength. In addition, when the bentonite dispersion exceeds the weight ratio, the elongation may be drastically lowered and the tensile strength may be drastically lowered, which is not preferable.
- carboxylic acid-modified nitrile copolymer latex and bentonite dispersion contained in the carboxylic acid-modified nitrile copolymer latex composition of the present invention will be described in detail.
- the glass transition temperature of the carboxylic acid-modified nitrile copolymer latex is -30 °C to -20 °C, preferably -30 °C to -21 ° C, more preferably -27 ° C to -21 ° C.
- the glass transition temperature of the carboxylic acid-modified nitrile copolymer latex is lower than -30 ° C., the tensile strength may be remarkably lowered. If the glass transition temperature is higher than ⁇ 20 ° C., the dip molded article may be cracked, which is not preferable. .
- the glass transition temperature of the carboxylic acid-modified nitrile copolymer latex can be measured, for example, by differential scanning calorimetry (Differential Scanning Calorimetry).
- the average particle diameter (D 50 ) of the carboxylic acid-modified nitrile copolymer latex is preferably 100 nm or more and 200 nm or less. If the average particle diameter of the carboxylic acid-modified nitrile copolymer latex is less than 100 nm, the viscosity of the latex may be increased and the dip molded article may be transparent, which is not preferable. On the other hand, when the average particle diameter exceeds 200nm, the production time is too long to produce a carboxylic acid-modified nitrile-based copolymer latex may not only reduce productivity, but also when applied to a dip molded product may reduce the tensile strength of the molded product It is not desirable.
- the average particle diameter (D 50 ) of the carboxylic acid-modified nitrile copolymer latex can be defined as the particle size at 50% of the particle size distribution, and can be measured by, for example, a laser scattering analyzer (Nicomp). have.
- the carboxylic acid-modified nitrile copolymer latex according to an embodiment of the present invention may be obtained by emulsion polymerization using a monomer mixture comprising a conjugated diene monomer, an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated acid monomer.
- 1,3-butadiene 2,3-dimethyl-1,3-butadiene, 2-ethyl-1
- One or more selected from the group consisting of 3-butadiene, 1,3-pentadiene and isoprene can be used.
- 1,3-butadiene and isoprene are preferable, and especially 1,3-butadiene can be used most preferably.
- the glass transition temperature of the carboxylic acid-modified nitrile copolymer latex may be controlled according to the content of the conjugated diene monomer.
- the conjugated diene monomer is 40% to 89% by weight, preferably 45% to 80% by weight, most preferably 50% to 78% by weight relative to the total weight of the monomers constituting the carboxylic acid-modified nitrile copolymer. May be included as a%.
- the dip molded product When the conjugated diene-based monomer content is less than 40% by weight, the dip molded product may be hard and the wear may be worsened. When the conjugated diene monomer content is greater than 89% by weight, the oil resistance of the dip molded product may be deteriorated and the tensile strength may be lowered.
- the ethylenically unsaturated nitrile monomers are, for example, acrylonitrile, methacrylonitrile, fumaronitrile, ⁇ -chloronitrile and ⁇ -cyano ethyl.
- acrylonitrile methacrylonitrile, fumaronitrile, ⁇ -chloronitrile and ⁇ -cyano ethyl.
- One or more selected from the group consisting of acrylonitrile can be used. Among them, acrylonitrile, methacrylonitrile or mixtures thereof are preferable, and acrylonitrile may be used most preferably.
- the ethylenically unsaturated nitrile monomer is 10 wt% to 50 wt%, preferably 15 wt% to 45 wt%, most preferably 20 wt% to the total weight of the monomers constituting the carboxylic acid-modified nitrile copolymer. It may be included in 40% by weight.
- the oil resistance of the dip molded product may be deteriorated, and the tensile strength may be lowered.
- the ethylenic unsaturated acid monomer of the monomer constituting the carboxylic acid-modified nitrile copolymer latex may include an ethylenically unsaturated monomer containing at least one acidic group selected from the group consisting of carboxyl group, sulfonic acid group and acid anhydride group. .
- ethylenically unsaturated carboxylic acid monomers such as acrylic acid, methacrylic acid, itaconic acid, maleic acid, or fumaric acid; Polycarboxylic acid anhydrides such as maleic anhydride or citraconic anhydride; Ethylenically unsaturated sulfonic acid monomers such as styrene sulfonic acid; And ethylenically unsaturated polycarboxylic acid partial ester monomers such as monobutyl fumarate, monobutyl maleate or mono-2-hydroxy propyl maleate, and the like, or a mixture thereof.
- methacrylic acid is particularly preferable.
- Such ethylenically unsaturated acid monomers may be used in the form of alkali metal salts or ammonium salts.
- the ethylenically unsaturated acid monomer is 0.1 to 10% by weight, preferably 0.5 to 9% by weight, more preferably 1 to 8% by weight relative to the total weight of the monomers constituting the carboxylic acid-modified nitrile copolymer. It may be included in weight percent.
- the dip molded article When the content of the ethylenically unsaturated acid monomer is less than 0.1% by weight, the dip molded article may have a lower tensile strength, and when the content of the ethylenically unsaturated acid monomer is greater than 10% by weight, the dip molded article may be hardened and wear may be worsened.
- the carboxylic acid-modified nitrile copolymer according to the present invention may optionally further include other ethylenically unsaturated monomers copolymerizable with the ethylenically unsaturated nitrile monomer and ethylenically unsaturated acid monomer.
- vinyl aromatic monomers selected from the group consisting of styrene, alkyl styrene, and vinyl naphthalene; Fluoroalkyl vinyl ethers such as fluoro ethyl vinyl ether; (Meth) acrylamide, N-methylol (meth) acrylamide, N, N-dimethylol (meth) acrylamide, N-methoxy methyl (meth) acrylamide, and N-propoxy methyl (meth) acrylamide Ethylenically unsaturated amide monomers selected from the group consisting of; Non-conjugated diene monomers such as vinyl pyridine, vinyl norbornene, dicyclopentadiene and 1,4-hexadiene; Methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, trifluoroethyl (me
- the amount of the ethylenically unsaturated nitrile monomer and other ethylenically unsaturated monomer copolymerizable with the ethylenically unsaturated acid monomer may be used within 20% by weight based on the total weight of the monomers constituting the carboxylic acid-modified nitrile copolymer, and 20% by weight. Exceeding this may result in a poor balance between soft fit and tensile strength.
- the carboxylic acid-modified nitrile copolymer latex according to an embodiment of the present invention may be prepared by adding an emulsifier, a polymerization initiator, a molecular weight modifier, etc. to a monomer constituting the carboxylic acid-modified nitrile copolymer latex. .
- emulsifier 1 or more types chosen from the group which consists of anionic surfactant, a nonionic surfactant, a cationic surfactant, and an amphoteric surfactant can be used.
- anionic surfactants selected from the group consisting of alkylbenzene sulfonates, aliphatic sulfonates, sulfuric acid ester salts of higher alcohols, ⁇ -olefin sulfonate salts, and alkyl ether sulfuric acid ester salts can be particularly preferably used.
- the average particle diameter of the carboxylic acid-modified nitrile copolymer latex may be controllable according to the type or content of the emulsifier.
- the emulsifier is preferably 0.3 parts by weight to 10 parts by weight, more preferably 0.8 parts by weight to 8 parts by weight, most preferably 1.5 parts by weight based on the total weight of the monomers constituting the carboxylic acid-modified nitrile copolymer. To 6 parts by weight.
- the amount of the emulsifier When the amount of the emulsifier is less than 0.3 parts by weight, the stability during polymerization may be lowered. When the amount of the emulsifier is more than 10 parts by weight, bubbles may increase, which may cause difficulty in manufacturing a dip molded product.
- a radical initiator can be used.
- the radical initiator include inorganic peroxides such as sodium persulfate, potassium persulfate, ammonium persulfate, potassium perphosphate or hydrogen peroxide; t-butyl peroxide, cumene hydroperoxide, p-mentanehydro peroxide, di-t-butyl peroxide, t-butylcumyl peroxide, acetyl peroxide, isobutyl peroxide, octanoyl peroxide, dibenzoyl peroxide Oxides or organic peroxides such as 3,5,5-trimethylhexanol peroxide and t-butyl peroxy isobutylate; At least one selected from the group consisting of azobis isobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexane carbonitrile, and azo
- the amount of the polymerization initiator may be included in an amount of preferably 0.01 parts by weight to 2 parts by weight, more preferably 0.02 parts by weight to 1.5 parts by weight, based on the total weight of monomers constituting the carboxylic acid-modified nitrile copolymer.
- the polymerization rate may be lowered, making it difficult to manufacture a dip molded article.
- the amount of the polymerization initiator is more than 2 parts by weight, the polymerization rate may be too fast to control the polymerization.
- the said molecular weight modifier is not specifically limited, For example, mercaptans, such as (alpha) -methylstyrene dimer, t-dodecyl mercaptan, n-dodecyl mercaptan, octyl mercaptan; Halogenated hydrocarbons such as carbon tetrachloride, methylene chloride or methylene bromide; And sulfur compounds such as tetraethyl thiuram disulfide, dipentamethylene thiuram disulfide, or diisopropylquixanthogen disulfide.
- mercaptans are preferable, and t-dodecyl mercaptan can be used more preferably.
- the amount of the molecular weight modifier used varies depending on the kind thereof, but is preferably 0.1 part by weight to 2.0 parts by weight, more preferably 0.2 part by weight to 1.5, based on the total weight of monomers constituting the carboxylic acid-modified nitrile copolymer. It can be in parts by weight, most preferably 0.3 parts by weight to 1.0 parts by weight.
- the amount of the molecular weight modifier is less than 0.1 part by weight, the physical properties of the dip molded article may be significantly lowered, and if it exceeds 2 parts by weight, the polymerization stability may be lowered.
- an activator may be added in addition to the above components, and the activator may be, for example, sodium formaldehyde sulfoxylate, sodium ethylenediamine tetraacetate, ferrous sulfate, dextrose At least one selected from the group consisting of sodium pyrrolate and sodium sulfite.
- additives such as chelating agent, dispersing agent, pH adjusting agent, deoxygenating agent, particle size adjusting agent, anti-aging agent and oxygen scavenger are added as necessary.
- additives such as chelating agent, dispersing agent, pH adjusting agent, deoxygenating agent, particle size adjusting agent, anti-aging agent and oxygen scavenger are added as necessary.
- the method of adding the monomer mixture constituting the carboxylic acid-modified nitrile copolymer is not particularly limited, and the method of introducing the monomer mixture into the polymerization reactor at once, the method of continuously introducing the monomer mixture into the polymerization reactor, and a part of the monomer mixture Any method of putting into a polymerization reactor and continuously supplying the remaining monomer to a polymerization reactor may be used.
- the polymerization temperature during the emulsion polymerization is not particularly limited, but may be, for example, 10 ° C to 90 ° C, specifically 25 ° C to 75 ° C.
- the conversion rate when stopping the polymerization reaction may be specifically 90% or more, more specifically 93% or more.
- a terminating agent of the polymerization reaction for stopping the polymerization reaction may be further added, and specific examples thereof may include isopropyl hexyl amine, diethyl hydroxyl amine or sodium dimethyl dithio carbamate.
- isopropyl hydroxy amine or diethyl hydroxy amine may change color of the final latex, sodium dimethyl dithio carbamate may be preferably used.
- the carboxylic acid-modified nitrile copolymer latex in the carboxylic acid-modified nitrile copolymer latex composition, is 80% to 99% by weight, preferably 85% by weight relative to the total weight of the composition It is preferable to include in the range of% to 98% by weight, most preferably 88% to 97% by weight in terms of physical properties of the dip molded product of the present invention.
- the content of the bentonite dispersion may affect the tensile strength and the fit of the dip molded article including the carboxylic acid-modified nitrile copolymer latex composition. Can be.
- the bentonite dispersion may be used in a 1 to 5 weight ratio based on the carboxylic acid-modified nitrile copolymer latex.
- the bentonite dispersion is less than the weight ratio, it may be difficult to improve the tensile strength, and when the bentonite dispersion exceeds the weight ratio, the elongation may be sharply lowered and the tensile strength may be sharply lowered, which is not preferable.
- the bentonite dispersion may be basically a form in which bentonite is dispersed in a solution, particularly water.
- the bentonite dispersion may be used by dispersing 1 part by weight to 20 parts by weight, preferably 1 part by weight to 10 parts by weight, of bentonite, based on 100 parts by weight of the solution.
- the viscosity of the solution may be increased and dispersion may not be well performed.
- the bentonite dispersion may be dispersed using, for example, a ball mill for 24 hours using glass beads, and may control the average particle diameter of bentonite dispersed in the dispersion as a ball mill.
- the bentonite dispersion preferably includes bentonite having an average particle diameter of 500 nm or more, preferably 1000 nm to 3000 nm. If the average particle size of the bentonite is less than 500 nm, the stability of the latex may be reduced when mixed with the carboxylic acid-modified nitrile copolymer latex, thereby causing cracks in the dip molded product.
- the average particle diameter (D 50 ) of the bentonite may be defined as a particle size based on 50% of the particle size distribution, and may be measured by, for example, a laser scattering analyzer (Nicomp).
- the carboxylic acid-modified nitrile copolymer latex composition may further include at least one additive selected from the group consisting of vulcanizing agents, ionic crosslinking agents, pigments, thickeners and pH adjusting agents.
- Additives such as vulcanizing agents, ionic crosslinking agents, pigments, thickeners and pH adjusting agents may be used additives commonly known in the art, but is not particularly limited thereto.
- Solid content concentration of the carboxylic acid-modified nitrile copolymer latex composition of the present invention is preferably 10% to 40% by weight, more preferably 15% to 35% by weight, most preferably 18% to 33% by weight May be%.
- the pH of the carboxylic acid-modified nitrile copolymer latex composition of the present invention may be preferably 8.0 to 12, more preferably 9 to 11, most preferably 9.3 to 10.5.
- the present invention may include a dip molded article comprising the carboxylic acid-modified nitrile copolymer latex composition.
- the dip molded article may be obtained by dip molding the carboxylic acid-modified nitrile copolymer latex composition.
- a conventional method can be used as a dip molding method for obtaining the dip molded article of the present invention.
- a direct dipping method, an anode adhesion dipping method, a Teague adhesion dipping method, etc. are mentioned.
- an anode adhesion dipping method is preferable because of the advantage that a dip molded article having a uniform thickness can be easily obtained.
- coagulants examples include metal halides such as barium chloride, calcium chloride, magnesium chloride, zinc chloride and aluminum chloride; Nitrates such as barium nitrate, calcium nitrate and zinc nitrate; Acetates such as barium acetate, calcium acetate and zinc acetate; Sulfates such as calcium sulfate, magnesium sulfate and aluminum sulfate. Of these, calcium chloride and calcium nitrate are preferred.
- the coagulant solution is a solution in which such coagulant is dissolved in water, alcohol or a mixture thereof.
- the concentration of coagulant in the coagulant solution can usually be 5% to 50% by weight, specifically 15% to 40% by weight.
- the dip molding mold to which the coagulant is attached may be immersed in the carboxylic acid-modified nitrile copolymer latex composition according to an embodiment of the present invention, and then the dip molding mold may be taken out to form a dip molding layer on the dip molding mold.
- the water component may first evaporate and curing through crosslinking may be performed. Subsequently, the dip molded layer crosslinked by heat treatment can be peeled off from the dip mold to obtain a dip molded article.
- the dip molded article may be applied to, for example, a dip molded latex article of surgical gloves, inspection gloves, condoms, catheters, industrial gloves, household gloves or health care products.
- Agitator, thermometer, cooler, nitrogen inlet and 10L high pressure reactor equipped with a monomer, emulsifier, and polymerization initiator are continuously replaced with nitrogen, followed by acrylonitrile 25% by weight, 1,3-butadiene 70 2.5 weight part of sodium alkyl benzene sulfonates, 0.5 weight part of t-dodecyl mercaptans, and 140 weight part of ion-exchange water were added with respect to 100 weight part of monomer mixtures of 5 weight% of methacrylic acid, and it heated up to 40 degreeC.
- Carboxe having a glass transition temperature of -21.4 ° C in the same manner as in Preparation Example 1, except that a monomer mixture of 31.4% by weight of acrylonitrile, 62.3% by weight of 1,3-butadiene and 6.3% by weight of methacrylic acid was used. This acid-modified nitrile copolymer latex was prepared.
- Carrier having a glass transition temperature of -23.1 ° C in the same manner as in Preparation Example 1, except that a monomer mixture of 31% by weight of acrylonitrile, 62.2% by weight of 1,3-butadiene and 6.8% by weight of methacrylic acid was used. This acid-modified nitrile copolymer latex was prepared.
- Carrier having a glass transition temperature of -31.4 ° C in the same manner as in Preparation Example 1, except that a monomer mixture of 27% by weight of acrylonitrile, 66% by weight of 1,3-butadiene and 7% by weight of methacrylic acid was used. This acid-modified nitrile copolymer latex was prepared.
- Carrier having a glass transition temperature of -18.28 ° C in the same manner as in Preparation Example 1, except that a monomer mixture of 30.5% by weight of acrylonitrile, 63% by weight of 1,3-butadiene and 6.5% by weight of methacrylic acid was used. This acid-modified nitrile copolymer latex was prepared.
- Carboxylated acrylonitrile-butadiene copolymer latex prepared in Preparation Example 1 97 weight ratio: Bentonite dispersion prepared in Preparation Example 6, except that 3 weight ratio was used, the same procedure as in Example 1 The main acid-modified nitrile copolymer latex composition was obtained.
- Carboxylated acrylonitrile-butadiene copolymer latex prepared in Preparation Example 1 95 weight ratio: Bentonite dispersion prepared in Preparation Example 6, except that 5 weight ratio was used, was carried out in the same manner as in Example 1 The main acid-modified nitrile copolymer latex composition was obtained.
- a carboxylic acid-modified nitrile copolymer latex composition was obtained in the same manner as in Example 1, except that the carboxylated acrylonitrile-butadiene copolymer latex prepared in Preparation Examples 2 and 3 was used.
- a carboxylic acid-modified nitrile copolymer latex composition was obtained in the same manner as in Example 1 except that no bentonite dispersion was added.
- a carboxylic acid-modified nitrile copolymer latex composition was obtained in the same manner as in Example 1, except that the carboxylated acrylonitrile-butadiene copolymer latex prepared in Preparation Examples 4 and 5 was used.
- a coagulant solution was prepared by mixing 18 parts by weight of calcium nitrate, 81.9 parts by weight of distilled water, and 0.1 parts by weight of wetting agent (Teric 320 produced by Huntsman Corporation, Australia).
- the hand-shaped ceramic mold was immersed in this solution for 10 seconds, pulled out, and dried at 80 ° C. for 4 minutes to apply a coagulant to the hand-shaped mold.
- the mold to which the coagulant was applied was immersed in the carboxylic acid-modified nitrile copolymer latex composition prepared in Example 1 for 10 seconds, pulled up, dried at 80 ° C. for 2 minutes, and then immersed in water or hot water for 1 minute.
- the mold was dried at 80 ° C. for 3 minutes and crosslinked at 90 ° C. for 20 minutes.
- the crosslinked dip molding layer was peeled off from the hand-shaped mold to obtain a dip molded article in the form of a glove.
- Example 6 Except for using the carboxylic acid-modified nitrile copolymer latex composition prepared in Examples 2 to 5, the dip molded article was obtained in the same manner as in Example 6.
- a dip molded article was obtained in the same manner as in Example 6, except that the carboxylic acid-modified nitrile copolymer latex composition prepared in Comparative Examples 1 to 5 was used.
- Example 1 9.83 34.19 143.5
- Example 2 9.80 33.99 141.3
- Example 3 9.80 33.83 142.6 Comparative Example 1 9.83 34.15 142.3
- Thickness (mm), Max Load (N), Tensile Strength (MPa), Elongation (%), Stress at 300% (MPa) and 500% of the Dip Molded Products obtained in Examples 6 to 10 and Comparative Examples 6 to 10 The stress (MPa) at was measured.
- Max Load N was obtained by measuring the external force applied to the specimen at the time of cutting.
- Tensile Strength (kgf / mm2) Load Value (kgf) / Thickness (mm) ⁇ Width (mm)
- Elongation (%) calculated after elongation / initial length ⁇ 100.
- Example 6 0.068 15.183 37.144 644.235 4.713 12.016
- Example 7 0.071 14.379 33.854 630.544 5.239 12.996
- Example 8 0.074 14.271 31.953 618.091 6.194 14.685
- Example 9 0.066 11.342 28.55 542.112 4.409 17.638
- Example 10 0.057 10.658 31.164 492.078 7.323 32.725 Comparative Example 6 0.070 14.535 34.597 635.308 4.127 11.242 Comparative Example 7 0.070 11.983 28.31 570.65 3.769 12.834 Comparative Example 8 0.057 10.568 31.164 492.078 7.323 32.725 Comparative Example 9 0.070 13.734 32.900 455.152 8.792 - Comparative Example 10 0.069 11.059 25.774 562.337 3.283 12.368
- Example 6 using the bentonite dispersion did not reduce elongation without increasing the thickness compared to Comparative Example 1 without using the bentonite dispersion.
- Example 6 the tensile strength of the glove specimens showed 10% or more superior to Comparative Example 6 without deteriorating the basic physical properties such as elongation.
- gloves having excellent tensile strength can be prepared using a carboxylic acid-modified nitrile copolymer latex and bentonite dispersion having a glass transition temperature of -30 ° C to -20 ° C.
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Abstract
Description
평균입경(nm) | 130℃ Gel(%) | 상온 Gel(%) | 유리전이 온도(Tg)(℃) | 표면장력(mN/m) | 분자량(kDa) | |
제조예 1 | 119.2 | 41.1 | 5 | -26.7 | 32.5 | 158 |
제조예 2 | 121.7 | 78.4 | 54.3 | -21.4 | 43.93 | 90 |
제조예 3 | 121.5 | 50.36 | 1.69 | -23.1 | 34.79 | 144 |
제조예 4 | 121.1 | 78.4 | 76.1 | -31.4 | 43.93 | 90 |
제조예 5 | 132.0 | 78.34 | 49.84 | -18.28 | 39.83 | 55 |
pH | 표면장력(mN/m) | 평균입경(nm) | |
실시예1 | 9.83 | 34.19 | 143.5 |
실시예2 | 9.80 | 33.99 | 141.3 |
실시예3 | 9.80 | 33.83 | 142.6 |
비교예 1 | 9.83 | 34.15 | 142.3 |
두께(mm) | MaxLoad(N) | 인장강도(MPa) | 신율(%) | 300%응력(MPa) | 500% 응력(MPa) | |
실시예6 | 0.068 | 15.183 | 37.144 | 644.235 | 4.713 | 12.016 |
실시예7 | 0.071 | 14.379 | 33.854 | 630.544 | 5.239 | 12.996 |
실시예8 | 0.074 | 14.271 | 31.953 | 618.091 | 6.194 | 14.685 |
실시예9 | 0.066 | 11.342 | 28.55 | 542.112 | 4.409 | 17.638 |
실시예10 | 0.057 | 10.658 | 31.164 | 492.078 | 7.323 | 32.725 |
비교예6 | 0.070 | 14.535 | 34.597 | 635.308 | 4.127 | 11.242 |
비교예7 | 0.070 | 11.983 | 28.31 | 570.65 | 3.769 | 12.834 |
비교예8 | 0.057 | 10.568 | 31.164 | 492.078 | 7.323 | 32.725 |
비교예9 | 0.070 | 13.734 | 32.900 | 455.152 | 8.792 | - |
비교예10 | 0.069 | 11.059 | 25.774 | 562.337 | 3.283 | 12.368 |
Claims (13)
- 유리전이 온도가 -30℃ 내지 -20℃인 카르본산 변성 니트릴계 공중합체 라텍스 및 벤토나이트 분산액을 포함하여 이루어지는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 1 항에 있어서,상기 카르본산 변성 니트릴계 공중합체 라텍스와 벤토나이트의 분산액은 99:1 내지 95:5의 중량비로 포함되는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 1 항에 있어서,상기 카르본산 변성 니트릴계 공중합체 라텍스는 평균입경이 100nm 이상 200nm 이하인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 1 항에 있어서,상기 벤토나이트 분산액은 평균 입경이 500nm 이상인 벤토나이트를 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 1 항에 있어서,상기 벤토나이트의 분산액은 용액 100 중량부에 대해 벤토나이트 1 중량부 내지 20중량부를 분산시킨 것임을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 1 항에 있어서,상기 카르본산 변성 니트릴계 공중합체 라텍스는 카르본산 변성 니트릴계 공중합체를 구성하는 단량체들의 총중량에 대해 공액 디엔계 단량체 40중량% 내지 89중량%, 에틸렌성 불포화 니트릴계 단량체 10중량% 내지 50중량% 및 에틸렌성 불포화산 단량체 0.1중량% 내지 10중량%를 포함하는 단량체 혼합물이 중합된 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 6 항에 있어서,상기 공액 디엔계 단량체는 1,3-부타디엔, 2,3-디메틸-1,3-부타디엔, 2-에틸-1,3-부타디엔, 1,3-펜타디엔 및 이소프렌으로 이루어진 군으로부터 1종 이상 선택되는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 6 항에 있어서,상기 에틸렌성 불포화 니트릴계 단량체는 아크릴로니트릴, 메타크릴로니트릴, 후마로니트릴, α-클로로니트릴 및 α-시아노 에틸 아크릴로니트릴로 이루어진 군으로부터 1종 이상 선택되는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 6 항에 있어서,상기 에틸렌성 불포화산 단량체는 아크릴산, 메타크릴산, 이타콘산, 말레이산, 푸마르산, 무수말레산, 무수 시트라콘산, 스티렌 술폰산, 푸마르산 모노부틸, 말레인산 모노부틸 및 말레인산 모노-2-히드록시 프로필로 이루어진 군으로부터 1종 이상 선택되는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 1 항에 있어서,상기 카르본산 변성 니트릴계 공중합체 라텍스는 상기 카르본산 변성 니트릴계 공중합체 라텍스 조성물 총중량에 대해 80 중량% 내지 99 중량%의 양으로 포함되는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 1 항에 있어서,상기 카르본산 변성 니트릴계 공중합체 라텍스 조성물은 가황제, 이온성 가교제, 안료, 증점제 및 pH 조절제로 이루어진 그룹으로부터 선택된 1종 이상의 첨가제를 더 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제 1 항에 따른 카르본산 변성 니트릴계 공중합체 라텍스 조성물을 포함하는 딥 성형품.
- 제 12 항에 있어서,상기 딥 성형품은 수술용 장갑, 검사장갑, 콘돔, 카테터, 산업용 장갑, 가정용 장갑 또는 건강 관리 용품의 딥 성형 라텍스 물품인 것을 특징으로 하는 딥 성형품.
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KR101599583B1 (ko) | 2016-03-03 |
US20150232637A1 (en) | 2015-08-20 |
CN105452362A (zh) | 2016-03-30 |
US9969861B2 (en) | 2018-05-15 |
CN105452362B (zh) | 2017-11-28 |
JP6338226B2 (ja) | 2018-06-06 |
KR20150025637A (ko) | 2015-03-11 |
MY174636A (en) | 2020-05-04 |
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