WO2019172539A1 - 카르본산 변성 니트릴계 공중합체 라텍스 조성물, 이의 제조방법, 이를 포함하는 딥 성형용 라텍스 조성물 및 이로부터 성형된 성형품 - Google Patents
카르본산 변성 니트릴계 공중합체 라텍스 조성물, 이의 제조방법, 이를 포함하는 딥 성형용 라텍스 조성물 및 이로부터 성형된 성형품 Download PDFInfo
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- WO2019172539A1 WO2019172539A1 PCT/KR2019/001635 KR2019001635W WO2019172539A1 WO 2019172539 A1 WO2019172539 A1 WO 2019172539A1 KR 2019001635 W KR2019001635 W KR 2019001635W WO 2019172539 A1 WO2019172539 A1 WO 2019172539A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/18—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
- 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
- C08L33/20—Homopolymers or copolymers of acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/02—Hydrogenation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/22—Incorporating nitrogen atoms into the molecule
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/25—Incorporating silicon atoms into the molecule
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
- C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
- C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/06—Butadiene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/46—Reaction with unsaturated dicarboxylic acids or anhydrides thereof, e.g. maleinisation
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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
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/011—Crosslinking or vulcanising agents, e.g. accelerators
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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
- C08K3/10—Metal compounds
- C08K3/105—Compounds containing metals of Groups 1 to 3 or of Groups 11 to 13 of the Periodic Table
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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
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
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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
- C08L15/00—Compositions of rubber derivatives
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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
- 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
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/20—Esters of polyhydric alcohols or phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
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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
- C08J2315/00—Characterised by the use of rubber derivatives
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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
- C08J2333/00—Characterised by the use 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; Derivatives of such polymers
- C08J2333/18—Homopolymers or copolymers of nitriles
- C08J2333/20—Homopolymers or copolymers of 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
- C08L2312/00—Crosslinking
Definitions
- the present invention relates to a carboxylic acid-modified nitrile copolymer latex composition, and more particularly, to a carboxylic acid-modified nitrile copolymer latex composition, a method for preparing the same, a latex composition for dip molding and a molded article formed therefrom. will be.
- natural rubber has been mainly used as a raw material for products requiring elasticity such as industrial, medical and food gloves, balloons, and condoms.
- natural rubber has been replaced by nitrile rubber in place of natural rubber due to side effects causing serious protein allergy to some users. Since nitrile rubber has high oil resistance, it is especially used in work gloves used by users dealing with organic solvents or medical and food gloves.
- a product made from nitrile rubber has a property that is not easily pierced by a needle, etc. compared to a product made from natural rubber, there is an advantage that it is suitable for use by medical personnel handling sharp scalpels, injection needles and the like.
- gloves when wearing gloves, gloves may be torn during use due to user's sweat or handling solution.To prevent this, gloves require a certain level of durability, especially gloves used in industrial fields. In the case of being used in an environment exposed to an acid, a base or an organic solvent, etc., chemical resistance for protecting the user's body is required. However, the thinner the glove, the lower the durability and chemical resistance of the glove, and thus, a glove having a high tensile strength and a low 300% modulus and at the same time having a superior durability and chemical resistance is continuously required.
- syneresis which is one of physical properties expressed as workability, is a phenomenon in which water escapes as agglomeration of particles in latex occurs. It will be fast. If the speed of the cineresis is too fast, the latex stability of the latex composition for the dip molding is lowered to cause agglomerates, which is a cause of failure of the gloves.
- the problem to be solved in the present invention in order to solve the problems mentioned in the technology that is the background of the invention, while improving the tensile strength of the dip molded product produced by dip molding, while lowering the modulus of 300%, while improving the fit To improve the durability, chemical resistance and workability at the same time, to reduce the content of residual monomers.
- the present invention has been made to solve the problems of the prior art, by using a latex composition for forming a dip, when manufacturing dip molded articles such as gloves, while improving workability, 300% modulus is low wearing gloves
- An object of the present invention is to provide a latex composition for forming a dip and a latex composition comprising the same, and a dip molded article molded therefrom.
- the present invention is a latex composition
- a latex composition comprising a carboxylic acid-modified nitrile copolymer, the carboxylic acid-modified nitrile copolymer is 2-hydroxyethyl methacrylate
- a carboxylic acid-modified nitrile-based copolymer latex composition containing less than 0.1 wt% to less than 12 wt% of monomer-derived repeating units, and having a content of coagulum in the carboxylic acid-modified nitrile-based copolymer latex composition.
- the present invention is a polymer containing a carboxylic acid-modified nitrile copolymer by polymerizing a monomer mixture containing more than 0.1% to less than 12% by weight of 2-hydroxyethyl methacrylate monomer relative to the total monomer mixture content
- it provides a method for producing a carboxylic acid-modified nitrile copolymer latex composition that is added to the total amount when the polymerization conversion rate of 20% to 60%.
- the present invention also provides a latex composition for dip molding comprising the carboxylic acid-modified nitrile copolymer composition and the crosslinking agent composition.
- the present invention also provides a molded article comprising the latex composition-derived layer for dip molding.
- a dip molded article such as gloves using a latex composition for dip molding comprising a carboxylic acid-modified nitrile copolymer latex composition according to the present invention
- the tensile strength of the manufactured dip molded article is improved, and 300% modulus is used. Lowering to improve the fit, and at the same time, there is an effect to improve the durability, chemical resistance and workability of the dip molded article, and to reduce the content of residual monomers.
- the term 'derived repeating unit' may refer to a component, a structure, or the substance itself derived from a substance, and in particular, 'derived repeating unit' refers to a monomer introduced during the polymerization of a polymer. It may mean a repeating unit made in the polymer.
- the term 'latex' in the present invention may mean that the polymer or copolymer polymerized by polymerization is present in a dispersed form in water, and specific examples of the fine particles of the polymer on rubber or copolymer of rubber on polymerized by emulsion polymerization. It may mean that is present in the form of dispersed in water in the colloidal state.
- the term 'coagulum' may refer to particles having a mean particle size of 74 ⁇ m or more, in which a copolymer or the like dispersed in the latex is coagulated and / or aggregated, and, for example, an average particle size filtered through a sieve having a size of 200 mesh is 74. It may mean a particle having a diameter of more than.
- the term 'derived layer' may refer to a layer formed from a polymer or a copolymer, and in particular, in the manufacture of a dip molded article, the polymer or copolymer may be attached, fixed, and / or polymerized on a dip mold to form a polymer or It may mean a layer formed from the copolymer.
- crosslinking agent-derived crosslinking portion' may refer to a component, a structure, or the substance itself resulting from the compound, and performs a role of crosslinking in or between polymers formed by the crosslinking agent composition. It may mean a cross linking part.
- the carboxylic acid-modified nitrile copolymer latex composition according to the present invention is a latex composition comprising a carboxylic acid-modified nitrile copolymer, wherein the carboxylic acid-modified nitrile copolymer comprises a repeating unit derived from 2-hydroxyethyl methacrylate monomer. It may contain more than 0.1% by weight to less than 12% by weight, and the content of the coagulant in the carboxylic acid-modified nitrile copolymer latex composition may be less than 1% by weight.
- the 2-hydroxyethyl methacrylate monomer-derived repeating unit together with the monomers forming the carboxylic acid-modified nitrile copolymer or repeating units derived from each monomer, It may be to form a modified nitrile-based copolymer, by including a repeating unit derived from 2-hydroxyethyl methacrylate monomer in the carboxylic acid-modified nitrile-based copolymer, carboxylic acid-modified containing a carboxylic acid-modified nitrile-based copolymer It improves the tensile properties such as tensile strength of the molded article prepared from the latex composition for dip molding including the nitrile copolymer latex composition, lowers the modulus by 300%, and has excellent durability and chemical resistance.
- 2-hydroxypropyl methacrylate, 3-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, 3-hydroxybutyl meta Acrylate, 4-hydroxybutyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 3-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, 3-hydroxybutyl acrylic Hydroxyalkyl (meth) acrylate monomers such as acrylate and 4-hydroxybutyl acrylate may also be used as monomers in the preparation of carboxylic acid-modified nitrile copolymer latex compositions.
- the hydroxyalkyl methacrylate monomers such as the chain of the alkyl group of the hydroxyalkyl group formed externally for each repeating unit derived from each monomer, that is,
- the long chains increase the distance between the main chains formed from each monomer-derived repeating unit, thereby lowering the crosslinking ability of the crosslinking agent-derived crosslinking portion formed by the crosslinking agent composition.
- hydroxyalkyl methacrylate monomers such as hydroxybutyl methacrylate
- the formation efficiency of the copolymer is reduced by 50% or more compared with 2-hydroxyethyl methacrylate.
- residual monomers which have not been polymerized are present in the latex composition, and they have a high boiling point, which is not easily removed even after the deodorization process, thereby increasing the residual monomer content of the molded article.
- the inclusion of a specific amount of repeating units derived from 2-hydroxyethyl methacrylate monomer in the carboxylic acid-modified nitrile copolymer according to the present invention improves the tensile properties of molded articles molded therefrom, Lowering to improve the fit, improve durability and chemical resistance, as well as to reduce the content of residual monomers, and is most desirable in improving workability.
- the carboxylic acid-modified nitrile copolymer is a repeating unit derived from 2-hydroxyethyl methacrylate monomer, more than 0.1% to less than 12% by weight, 0.5% to 10% by weight %, 1% by weight to 8% by weight, or 1.5% by weight to 6% by weight, and within this range, the crosslinking ability derived from the crosslinking agent formed by the crosslinking agent composition is improved, and the carboxylic acid-modified nitrile is improved.
- Improved tensile properties such as tensile strength of molded articles prepared from dip molding latex compositions comprising carboxylic acid-modified nitrile-based copolymer latex compositions comprising a copolymer-based copolymer, lowering the modulus by 300%, improving wearability, durability and It is excellent in chemical resistance, excellent in workability, and excellent in long-term storage stability of the latex composition.
- the content of the repeating unit derived from the 2-hydroxyethyl methacrylate monomer described as "wt%" may be a content with respect to the total content of the carboxylic acid-modified nitrile copolymer.
- the carboxylic acid-modified nitrile copolymer is a repeating unit derived from a conjugated diene monomer, a repeating unit derived from an ethylenically unsaturated nitrile monomer, together with a 2-hydroxyethyl methacrylate monomer-derived repeating unit It may include a unit and a repeating unit derived from an ethylenic unsaturated acid monomer.
- the carboxylic acid-modified nitrile copolymer according to an embodiment of the present invention, the repeating unit derived from the conjugated diene monomer, the repeating unit derived from the ethylenically unsaturated nitrile monomer, the repeating unit derived from the ethylenically unsaturated acid monomer and 2-hydride It may be one containing a repeating unit derived from a oxyethyl methacrylate monomer.
- carboxylic acid-modified nitrile copolymer examples include 40 wt% to 80 wt% of the repeating unit derived from conjugated diene monomer, 10 wt% to 50 wt% of the repeating unit derived from ethylenically unsaturated nitrile monomer, and derived from ethylenically unsaturated acid monomer. 0.1 to 10 wt% of the repeating unit and more than 0.1 wt% to less than 12 wt% of the repeating unit derived from the 2-hydroxyethyl methacrylate monomer.
- the conjugated diene monomer forming the conjugated diene monomer-derived repeating unit is 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3 It may be at least one selected from the group consisting of -butadiene, 1,3-pentadiene and isoprene, may be 1,3-butadiene or isoprene, and more specifically, may be 1,3-butadiene.
- the carboxylic acid-modified nitrile copolymer may include 40 wt% to 80 wt%, 45 wt% to 80 wt%, or 45 wt% to 70 wt% of the repeating unit derived from the conjugated diene monomer.
- Dip molded articles formed from the latex composition for dip molding comprising the carboxylic acid-modified nitrile-based copolymer latex composition comprising the carboxylic acid-modified nitrile-based copolymer therein are flexible, excellent in fit, and have oil resistance and tensile strength. Excellent effect.
- the content of the conjugated diene-based monomer-derived repeating unit described as "wt%" may be a content with respect to the total content of the carboxylic acid-modified nitrile copolymer.
- the ethylenically unsaturated nitrile monomers forming the repeating unit derived from the ethylenically unsaturated nitrile monomers are acrylonitrile, methacrylonitrile, fumaronitrile, ⁇ -chloronitrile and ⁇ . It may be one or more selected from the group consisting of cyano ethyl acrylonitrile, specific examples may be acrylonitrile and methacrylonitrile, and more specific examples may be acrylonitrile.
- the carboxylic acid-modified nitrile copolymer may include 10 wt% to 50 wt%, 15 wt% to 50 wt%, or 15 wt% to 45 wt% of the repeating unit derived from the ethylenically unsaturated nitrile monomer.
- the dip molded article molded from the latex composition for dip molding comprising the carboxylic acid-modified nitrile-based copolymer latex composition containing the carboxylic acid-modified nitrile-based copolymer is flexible, has excellent fit, oil resistance and tension. The strength is excellent.
- the content of the ethylenically unsaturated nitrile-based monomer-derived repeating unit described as "wt%" may be a content with respect to the total content of the carboxylic acid-modified nitrile copolymer.
- the ethylenically unsaturated acid monomer forming the repeating unit derived from the ethylenically unsaturated acid monomer may be an ethylenically unsaturated monomer containing an acidic group such as a carboxyl group, sulfonic acid group, acid anhydride group, Specific examples include ethylenically unsaturated carboxylic acid monomers such as acrylic acid, methacrylic acid, itaconic acid, maleic acid and fumaric acid; Polycarboxylic anhydrides such as maleic anhydride and citraconic anhydride; Ethylenically unsaturated sulfonic acid monomers such as styrene sulfonic acid; It may be at least one selected from the group consisting of ethylenically unsaturated polycarboxylic acid partial ester monomers such as monobutyl fumarate, monobutyl maleate and mono-2-hydroxy propyl maleate, and
- the ethylenic unsaturated acid monomer may be used in the form of a salt such as an alkali metal salt or an ammonium salt during polymerization.
- the carboxylic acid-modified nitrile copolymer may comprise 0.1 to 10% by weight, 0.5 to 9% by weight, or 2 to 8% by weight of the repeating unit derived from the ethylenically unsaturated acid monomer
- a dip molded article molded from a latex composition for dip molding comprising a carboxylic acid-modified nitrile-based copolymer latex composition comprising the carboxylic acid-modified nitrile-based copolymer is flexible, has excellent fit, and has tensile strength. Has an excellent effect.
- the content of the ethylenically unsaturated acid monomer-derived repeating unit described as "wt%" may be a content with respect to the total content of the carboxylic acid-modified nitrile copolymer.
- the carboxylic acid-modified nitrile copolymer latex composition the content of coagulum in the carboxylic acid-modified nitrile copolymer latex composition is less than 1% by weight, less than 0.9% by weight It may be less than 0.1% by weight, or less than 0.01% by weight, and the polymerization stability and latex stability of the carboxylic acid-modified nitrile copolymer latex composition within this range, and the effect of preventing the degradation of physical properties due to coagulation in the molded article have.
- the coagulated product may be particles having an average particle diameter of 74 ⁇ m or more present in the carboxylic acid-modified nitrile copolymer latex composition, and the amount of generation may decrease or increase according to the type and timing of the monomers. It may be particles having an average particle diameter filtered through the sieve of 74 ⁇ m or more.
- the content of the coagulant in the carboxylic acid-modified nitrile copolymer latex composition may be the content of the total content of the carboxylic acid-modified nitrile copolymer latex composition.
- the carboxylic acid-modified nitrile copolymer latex composition the solid content (concentration) is 10% to 80% by weight, 30% to 60% by weight, or 35% by weight to It may be 55% by weight, pH may be 7 to 12, 7 to 10, or 8 to 9.5, excellent latex stability and storage stability within this range, the effect of easy to prepare a latex composition for dip molding have.
- the present invention also provides a method for preparing a carboxylic acid-modified nitrile copolymer latex composition for preparing the carboxylic acid-modified nitrile copolymer latex composition.
- the method for preparing the carboxylic acid-modified nitrile copolymer latex composition is a carboxylic acid-modified by polymerizing a monomer mixture containing 2-hydroxyethyl methacrylate monomer in excess of 0.1% by weight to less than 12% by weight based on the total monomer mixture content
- Preparing a carboxylic acid-modified nitrile copolymer latex composition comprising a nitrile copolymer (S10), wherein the 2-hydroxyethyl methacrylate monomer included in the monomer mixture is polymerized in the step (S10).
- Full amount before start A part is added before the start of the polymerization, and a residual amount is added at a time point at which the polymerization conversion rate is 20% to 60%; Alternatively, the total amount may be added at the time of 20% to 60% polymerization conversion rate.
- the monomer mixture may include a conjugated diene monomer, an ethylenically unsaturated nitrile monomer, an ethylenically unsaturated acid monomer and a 2-hydroxyethyl methacrylate monomer.
- the polymerization may be carried out by emulsion polymerization.
- the polymerization may be carried out by polymerization of the monomer mixture, and each monomer included in the monomer mixture may be added in the type and content of the aforementioned monomers, and may be added in a batch, or continuously.
- the 2-hydroxyethyl methacrylate monomer included in the monomer mixture may be made at any stage of the polymerization, it may be added in two or more times in the polymerization step.
- the 2-hydroxyethyl methacrylate monomer may be introduced into the polymerization reactor at the same time with the respective monomers before the start of the polymerization, prior to the polymerization, a part of the 2-hydroxyethyl methacrylate monomer before the start of the polymerization It may introduce
- the 2-hydroxyethyl methacrylate monomer included in the monomer mixture may be added before the start of the polymerization of the step (S10), in this case there is an excellent effect of polymerization stability;
- the 2-hydroxyethyl methacrylate monomer may be partially added before the start of the polymerization, and the remaining amount may be added at a time point at which the polymerization conversion rate is 20% to 60%, 20% to 50%, or 20% to 40%, in which case 2- Repeating units derived from hydroxyethyl methacrylate monomers are evenly distributed in the carboxylic acid-modified nitrile copolymer, thereby improving tensile properties such as tensile strength;
- 2-hydroxyethyl methacrylate monomer may be added in its entirety at the time of 20% to 60%, 20% to 50%, or 20% to 40% of polymerization conversion, in which case the content of unreacted monomers is reduced.
- the 2-hydroxyethyl methacrylate monomer may be preferably added in the entire amount before the polymerization conversion rate of 60%, 50%, or 40% in all cases, such as batch or split injection, in this case
- the copolymer formation efficiency of the 2-hydroxyethyl methacrylate monomer is improved, thereby improving the durability and chemical resistance of the molded article and improving workability.
- the polymerization conversion rate may be calculated by Equation 1 after taking a certain amount of sample from the composition being reacted at a predetermined time interval, and measuring the content of solids in the sample. .
- Equation 1 Ms is the weight of the dried copolymer, Mo is the sum of the emulsifier and the polymerization initiator weight, Mp is the weight of the 100% polymerized copolymer, M'o is the sum of the weight of the emulsifier and the polymerization initiator to be.
- the polymerization may be carried out in the presence of an emulsifier, a polymerization initiator and a molecular weight regulator.
- the emulsifier may be at least one selected from the group consisting of, for example, anionic surfactants, nonionic surfactants, cationic surfactants and amphoteric surfactants, and specific examples of alkylbenzenesulfonic acid.
- At least one anionic surfactant selected from the group consisting of salts, aliphatic sulfonates, higher alcohol sulfate ester salts, ⁇ -olefin sulfonates and alkyl ether sulfate ester salts.
- the emulsifier may be added to 0.3 parts by weight to 10 parts by weight, 0.8 parts by weight to 8 parts by weight, or 1.5 parts by weight to 6 parts by weight with respect to 100 parts by weight of the total monomer mixture, the polymerization stability is within this range It is excellent and there is little foaming effect, it is easy to manufacture a molded article.
- the polymerization initiator may be a radical initiator, for example, inorganic peroxides such as sodium persulfate, potassium peroxide, ammonium persulfate, potassium perphosphate and 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 Organic peroxides such as oxides, 3,5,5-trimethylhexanol peroxide and t-butyl peroxy isobutylate; One or more selected from the group consisting of nitrogen compounds such as azobis isobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohe
- the polymerization initiator may be added in an amount of 0.01 parts by weight to 2 parts by weight, or 0.02 parts by weight to 1.5 parts by weight, based on 100 parts by weight of the total content of the monomer mixture, and the effect of maintaining the polymerization rate at an appropriate level within this range. There is.
- the molecular weight modifier is, for example, ⁇ -methylstyrene dimer; mercaptans such as t-dodecyl mercaptan, n-dodecyl mercaptan and octyl mercaptan; Halogenated hydrocarbons such as carbon tetrachloride, methylene chloride and methylene bromide; It may be one or more selected from the group consisting of sulfur-containing compounds such as tetraethyl thiuram disulfide, dipentamethylene thiuram disulfide, diisopropylxanthogen disulfide, and the like, and may specifically be t-dodecyl mercaptan.
- sulfur-containing compounds such as tetraethyl thiuram disulfide, dipentamethylene thiuram disulfide, diisopropylxanthogen disulfide, and the like, and may specifically be t-d
- the molecular weight modifier may be added in an amount of 0.1 parts by weight to 2.0 parts by weight, 0.2 parts by weight to 1.5 parts by weight, or 0.3 parts by weight to 1.0 parts by weight with respect to 100 parts by weight of the total monomer mixture, and polymerization stability within this range. It is excellent in this and at the time of manufacture of a molded article after superposition
- the polymerization may be carried out including an activator
- the activator is for example sodium formaldehyde, sulfoxylate, sodium ethylenediamine tetraacetate, ferrous sulfate, dex It may be at least one selected from the group consisting of trorose, sodium pyrrolate and sodium sulfite.
- the activator may be added to 0.001 parts by weight to 5 parts by weight based on 100 parts by weight of the total monomer mixture.
- the polymerization may be carried out in water, for example, deionized water as a medium, and in order to ensure the ease of polymerization, chelating agents, dispersants, pH regulators, deoxygenants, particle size regulators as necessary It may be carried out further including additives such as anti-aging agent and oxygen trapping agent.
- the emulsifier, polymerization initiator, molecular weight regulator, additives and the like may be added to the polymerization reactor in a batch, or divided into, such as the monomer mixture, may be added continuously in each input.
- the polymerization may be carried out at a polymerization temperature of 10 °C to 90 °C, 20 °C to 80 °C, or 25 °C to 75 °C, the effect of excellent latex stability within this range There is.
- the carboxylic acid-modified nitrile copolymer latex manufacturing method may include the step of obtaining a carboxylic acid-modified nitrile copolymer latex composition by terminating the polymerization reaction. Termination of the polymerization reaction may be carried out at a time when the polymerization conversion rate is 90% or more, or 95% or more.
- the carboxylic acid-modified nitrile copolymer latex manufacturing method may further comprise the step of removing the unreacted monomer by the deodorization process after the completion of the polymerization reaction.
- a latex composition for dip molding comprising the carboxylic acid-modified nitrile copolymer latex.
- the dip molding latex composition may include the carboxylic acid-modified nitrile copolymer and the crosslinking agent composition.
- the crosslinking agent composition may be for forming a crosslinking agent-derived crosslinking portion through a crosslinking reaction with respect to the carboxylic acid-modified nitrile copolymer.
- the crosslinking agent composition may include a vulcanizing agent and a vulcanizing accelerator, and more specifically, may include a vulcanizing agent, a vulcanizing accelerator and zinc oxide.
- the vulcanizing agent is for vulcanizing the latex composition for dip molding, and may be sulfur.
- sulfur such as powdered sulfur, precipitated sulfur, colloidal sulfur, surface-treated sulfur, and insoluble sulfur, etc. Can be.
- the content of the vulcanizing agent may be 0.1 part by weight to 10 parts by weight, or 1 part by weight to 5 parts by weight, based on 100 parts by weight (based on solids) of the total amount of the carboxylic acid-modified nitrile copolymer in the dip molding latex composition. In this range, the crosslinking ability by vulcanization is excellent.
- the vulcanization accelerator 2-mercaptobenzothiazole (MBT, 2-mercaptobenzothiazole), 2,2-dithiobisbenzothiazole-2-sulfenamide (MBTS, 2,2 -dithiobisbenzothiazole-2-sulfenamide), N-cyclohexylbenzothiazol-2-sulfenamide (CBS, N-cyclohexylbenzothiasole-2-sulfenamide), 2-morpholinothiobenzothiazole (MBS, 2-morpholinothiobenzothiazole), tetra Tetramethylthiuram monosulfide (TMTM), tetramethylthiuram disulfide (TMTD), diethyldithiocarbamate zinc (ZDEC, zinc diethyldithiocarbamate), di-n-butyldithiocarbamate zinc (ZDBC, zinc di-n-butyldithio
- the content of the vulcanization accelerator may be 0.1 parts by weight to 10 parts by weight, or 0.5 parts by weight to 5 parts by weight based on 100 parts by weight (based on solids) of the total amount of the carboxylic acid-modified nitrile copolymer in the latex composition for dip molding. In this range, the crosslinking ability by vulcanization is excellent.
- the zinc oxide is ion-bonded with a carboxyl group and the like of the carboxylic acid-modified nitrile copolymer in the dip molding latex composition, in the carboxylic acid-modified nitrile copolymer, or carboxylic acid It may be a crosslinking agent for forming a crosslinking portion through ionic bonding between the modified nitrile-based copolymer.
- the zinc oxide content may be 0.1 part by weight to 5 parts by weight, or 0.5 part by weight to 4 parts by weight, based on 100 parts by weight (based on solids) of the total amount of the carboxylic acid-modified nitrile copolymer in the latex composition for dip molding. Within this range, the crosslinking ability is excellent, the latex stability is excellent, and the tensile strength and flexibility of the manufactured dip molded product are excellent.
- the crosslinking agent composition may include a polyvalent metal cation compound.
- the polyvalent metal cation compound may be a compound including a ligand that slowly elutes aluminum ions and aluminum ions, and specific examples include aluminum glycolate and aluminum acetylacetonate. acetylacetonate, aluminum lactate, and aluminum tartrate, and may be one or more selected from the group consisting of 1 to 3 equivalents of aluminum used for slowly eluting aluminum ions. Can be.
- the aluminum cation compound is used as a crosslinking agent of an ionic bond or a covalent bond as described above, the weakening of the bond in the acidic solution can be prevented, and thus, the strength decrease of the dip molded article can be prevented.
- the content of the polyvalent metal cation compound is 0.1 parts by weight to 5 parts by weight, 0.5 parts by weight based on 100 parts by weight (based on solids) of the carboxylic acid-modified nitrile copolymer latex composition. It may be from 5 parts by weight, or 0.5 parts by weight to 3 parts by weight, it is possible to prevent the weakening of the bond in the acidic solution within this range, thereby reducing the strength of the dip molded article is effective.
- the dip molding latex composition for example, solid content (concentration) of 5% to 40% by weight, 8% to 35% by weight, or 10% to 30% by weight In this range, it is excellent in the efficiency of latex transport within this range, there is an effect of preventing storage of the latex viscosity rise excellent storage stability.
- the dip molding latex composition may have a pH of 9 to 12, 9 to 11.5, or 9.5 to 11, and has an effect of excellent workability and productivity when manufacturing a dip molded product within this range.
- the pH of the dip molding latex composition may be adjusted by the addition of the pH adjuster described above.
- the pH adjusting agent may be, for example, an aqueous potassium hydroxide solution at a concentration of 1% by weight to 5% by weight, or ammonia water at a concentration of 1% by weight to 5% by weight.
- the dip molding latex composition may further include additives such as pigments such as titanium dioxide, fillers such as silica, thickeners, and pH adjusting agents, as necessary.
- additives such as pigments such as titanium dioxide, fillers such as silica, thickeners, and pH adjusting agents, as necessary.
- a molded article comprising the latex composition-derived layer for dip molding.
- the molded article may be a dip molded article manufactured by dip molding the latex composition for dip molding, and may be a molded article including a latex composition derived layer for dip molding formed from the latex composition for dip molding by dip molding.
- the method for manufacturing a molded article for molding the molded article may include immersing the latex composition for dip molding by a direct dipping method, an anode adhesion dipping method, a teague adhesion dipping method, and the like. It can be carried out by the adhesion immersion method, in this case there is an advantage to obtain a dip molded article of uniform thickness.
- the method for manufacturing a molded article includes attaching a coagulant to a dip molding die (S100); Forming a dip molding latex composition-derived layer, ie, a dip molding layer, by dipping the dip molding mold to which the coagulant is attached to the latex composition for dip molding; And crosslinking the dip molding latex composition by heating the dip molding layer (S300).
- the step (S100) is a step of immersing the dip mold in a coagulant solution to attach a coagulant to the surface of the dip mold to form a coagulant in the dip mold, wherein the coagulant solution is a coagulant.
- a coagulant solution Is a solution dissolved in water, alcohol or a mixture thereof, and the content of the coagulant in the coagulant solution is 5% by weight to 75% by weight, 10% by weight to 65% by weight, or 15% by weight to 55% by weight of the total content of the coagulant solution. May be%.
- the coagulant includes, for example, 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, zinc acetate and the like; And it may be one or more selected from the group consisting of sulfates such as calcium sulfate, magnesium sulfate, aluminum sulfate, and the like, specifically, may be calcium chloride or calcium nitrate.
- 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, zinc acetate and the like
- sulfates such as calcium sulfate, magnesium sulfate, aluminum sulfate,
- the dip mold in the step (S100), in order to attach the coagulant to the dip mold, the dip mold is immersed in the coagulant solution for at least 1 minute, taken out and dried at 70 ° C. to 150 ° C. It may further include.
- the step (S200) is a dip molding mold to which a coagulant is adhered to form a dip molding layer is immersed in the latex composition for dip molding according to the present invention, taken out dip molding in a dip molding mold Forming a layer.
- the immersion in the step (S200), in order to form a dip molding layer in a dip molding mold, the immersion may be performed for 1 minute or more.
- the step (S300) is to heat the dip molding layer formed on the dip molding mold to obtain a dip molded product to evaporate the liquid component, cross-link the latex composition for dip molding to proceed with curing It may be a step.
- crosslinking by vulcanization and / or ionic bonding of the crosslinking agent composition contained in the dip molding latex composition may be performed.
- the heating is carried out by first heating at 70 °C to 150 °C for 1 minute to 10 minutes, and then secondary heating at 100 °C to 180 °C for 5 minutes to 30 minutes Can be.
- the molded article may be a glove, a condom, a catheter, or a health care product such as a surgical glove, an examination glove, an industrial glove, and a household glove.
- Nitrogen was replaced by a 10 L high-pressure reactor equipped with a stirrer, a thermometer, a cooler, and an inlet for nitrogen gas, and an inlet for continuously inputting monomers, emulsifiers, and initiators, and acrylonitrile 32 wt%, 1,3- 100 parts by weight of a mixture of 59% by weight of butadiene, 6% by weight of methacrylic acid and 3% by weight of 2-hydroxyethyl methacrylate, 3 parts by weight of sodium alkyl benzene sulfonate, 0.6 parts by weight of t-dodecyl mercaptan and ions 140 weight part of exchanged water was thrown in, and it heated up to 38 degreeC.
- a coagulant solution was prepared by mixing 13% by weight calcium nitrate, 86.5% by weight water and 0.5% by weight wetting agent (trade name Teric 320, manufactured by Huntsman Corporation, Australia), and hand-shaped ceramic mold was added to the solution for 1 minute. Dip, take out and dry at 80 ° C. for 3 minutes to apply a coagulant to the hand-shaped mold.
- wetting agent trade name Teric 320, manufactured by Huntsman Corporation, Australia
- the hand-shaped mold to which the coagulant was applied was immersed in the obtained latex latex composition for 1 minute, taken out, dried at 80 ° C for 1 minute, and soaked in water for 3 minutes. Again, the mold was dried at 80 ° C. for 3 minutes and then crosslinked at 125 ° C. for 20 minutes. Thereafter, the cross-linked dip molding layer was peeled off from the hand-shaped mold to obtain a dip molded article in the form of a glove.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 30% by weight of acrylonitrile, 58% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 2- as monomer mixtures in the same reactor. The same procedure as in Example 1 was carried out except that 100 parts by weight of a 6% by weight hydroxyethyl methacrylate monomer mixture was added. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 32% by weight of acrylonitrile, 60.5% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 2- as monomer mixture in the same reactor The same procedure as in Example 1 was carried out except that 100 parts by weight of the monomer mixture of 1.5% by weight of hydroxyethyl methacrylate was added. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 30% by weight of acrylonitrile, 58% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 2- as monomer mixtures in the same reactor. 100 parts by weight of a monomer mixture of 6% by weight of hydroxyethyl methacrylate was added, but 2-hydroxyethyl methacrylate was added into 3% by weight before the start of polymerization and 3% by weight at the time of 30% polymerization conversion. The same procedure as in Example 1 was conducted except for the one. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Nitrogen was replaced by a 10 L high-pressure reactor equipped with a stirrer, a thermometer, a cooler, and an inlet for nitrogen gas, and an inlet for continuously inputting monomers, emulsifiers, and initiators, and acrylonitrile 32 wt%, 1,3- 100 parts by weight of a mixture of 59% by weight of butadiene, 6% by weight of methacrylic acid and 3% by weight of 2-hydroxyethyl methacrylate, 3 parts by weight of sodium alkyl benzene sulfonate, 0.6 parts by weight of t-dodecyl mercaptan and ions 140 weight part of exchanged water was thrown in, and it heated up to 38 degreeC.
- a coagulant solution was prepared by mixing 13% by weight calcium nitrate, 86.5% by weight water and 0.5% by weight wetting agent (trade name Teric 320, manufactured by Huntsman Corporation, Australia), and hand-shaped ceramic mold was added to the solution for 1 minute. Dip, take out and dry at 80 ° C. for 3 minutes to apply a coagulant to the hand-shaped mold.
- wetting agent trade name Teric 320, manufactured by Huntsman Corporation, Australia
- the hand-shaped mold to which the coagulant was applied was immersed in the obtained latex latex composition for 1 minute, taken out, dried at 80 ° C for 1 minute, and soaked in water for 3 minutes. Again, the mold was dried at 80 ° C. for 3 minutes and then crosslinked at 125 ° C. for 20 minutes. Thereafter, the cross-linked dip molding layer was peeled off from the hand-shaped mold to obtain a dip molded article in the form of a glove.
- Nitrogen was replaced by a 10 L high-pressure reactor equipped with a stirrer, a thermometer, a cooler, an inlet for nitrogen gas, and an inlet for continuously inputting monomers, emulsifiers, and initiators, and acrylonitrile 30% by weight, 1,3- 100 parts by weight of a monomer mixture of 58% by weight of butadiene, 6% by weight of methacrylic acid and 6% by weight of 2-hydroxyethyl methacrylate, 3 parts by weight of sodium alkyl benzene sulfonate, 0.6 parts by weight of t-dodecyl mercaptan and ions 140 weight part of exchanged water was thrown in, and it heated up to 38 degreeC.
- a coagulant solution was prepared by mixing 13% by weight calcium nitrate, 86.5% by weight water and 0.5% by weight wetting agent (trade name Teric 320, manufactured by Huntsman Corporation, Australia), and hand-shaped ceramic mold was added to the solution for 1 minute. Dip, take out and dry at 80 ° C. for 3 minutes to apply a coagulant to the hand-shaped mold.
- wetting agent trade name Teric 320, manufactured by Huntsman Corporation, Australia
- the hand-shaped mold to which the coagulant was applied was immersed in the obtained latex latex composition for 1 minute, taken out, dried at 80 ° C for 1 minute, and soaked in water for 3 minutes. Again, the mold was dried at 80 ° C. for 3 minutes and then crosslinked at 125 ° C. for 20 minutes. Thereafter, the cross-linked dip molding layer was peeled off from the hand-shaped mold to obtain a dip molded article in the form of a glove.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, a monomer mixture of 32% by weight of acrylonitrile, 62% by weight of 1,3-butadiene and 6% by weight of methacrylic acid as a monomer mixture in the same reactor. Except that 100 parts by weight was carried out in the same manner as in Example 1. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 27% by weight of acrylonitrile, 56.5% by weight of 1,3-butadiene, 4.5% by weight of methacrylic acid and 2- in a monomer mixture in the same reactor The same procedure as in Example 1 was carried out except that 100 parts by weight of the monomer mixture of 12% by weight of hydroxyethyl methacrylate was added. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 32% by weight of acrylonitrile, 61.9% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 2- as monomer mixtures in the same reactor The same procedure as in Example 1 was carried out except that 100 parts by weight of a monomer mixture of 0.1% by weight of hydroxyethyl methacrylate was added. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 30% by weight of acrylonitrile, 58% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 2- as monomer mixtures in the same reactor. 100 parts by weight of a mixture of 6% by weight of hydroxyethyl methacrylate is added, but 2-hydroxyethyl methacrylate is not added before the start of polymerization, and a total amount (6% by weight) is added at a polymerization conversion rate of 70%. The same procedure as in Example 1 was conducted except for the one. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 32% by weight of acrylonitrile, 59% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 2- as monomer mixture in the same reactor The same procedure as in Example 1 was carried out except that 100 parts by weight of a 3% by weight hydroxyethyl acrylate monomer mixture was added. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 32% by weight of acrylonitrile, 59% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 2- as monomer mixture in the same reactor The same procedure as in Example 1 was carried out except that 100 parts by weight of the monomer mixture of 3% by weight of hydroxypropyl methacrylate was added. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 32% by weight of acrylonitrile, 59% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 4- as monomer mixture in the same reactor The same procedure as in Example 1 was carried out except that 100 parts by weight of the monomer mixture of 3% by weight of hydroxybutyl acrylate was added. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Example 1 when preparing a carboxylic acid-modified nitrile copolymer latex composition, 32% by weight of acrylonitrile, 59% by weight of 1,3-butadiene, 6% by weight of methacrylic acid, and 4- as monomer mixture in the same reactor The same procedure as in Example 1 was carried out except that 100 parts by weight of the monomer mixture of 3% by weight of hydroxybutyl methacrylate was added. At this time, the solid content concentration of the obtained carboxylic acid-modified nitrile copolymer latex composition was 45% by weight, pH was 8.5.
- Tensile Properties (tensile strength, elongation and 300% modulus): Dumbbell-shaped test pieces were prepared in accordance with ASTM D-412 using the dip molded products obtained in the Examples and Comparative Examples. The specimen was pulled at a stretching speed of 500 mm / min using a UTM (Universal Testing Machine) instrument, the tensile strength and elongation at break were measured, and the stress (300% modulus) at 300% elongation was measured. . The higher the tensile strength and elongation, the better the tensile properties. The lower the 300% modulus, the better the fit.
- UTM Universal Testing Machine
- a hand-shaped ceramic mold was immersed in the coagulant solution used for the preparation of the dip molded product for 1 minute, taken out, and dried at 80 ° C. for 3 minutes to apply a coagulant to the hand-shaped mold. Thereafter, the hand-shaped mold to which the coagulant was applied was immersed in the latex compositions for dip molding of the Examples and Comparative Examples for 1 minute, and taken out, and the time taken for the droplets to fall out of the hand-shaped mold was measured. If the droplet did not drop within 5 minutes, it was marked with an X.
- TVOC Total Volatile Organic Compounds
- Gloves dip molded products obtained in Examples and Dip Comparative Examples were placed in a Tedlar bag and then air. 1 L of the component was charged and left at 60 ° C. for 24 hours. After 24 hours, the air in the Tedlar bag was collected in a Tenax tube, and the content of volatile organic compounds (VOC) in the air collected using a gas chromatograph-mass spectrometer (GC / MS). Measured and shown.
- VOC volatile organic compounds
- Polymerization stability (% by weight): Particles solidified to an average particle diameter of 74 ⁇ m or more by filtering a carboxylic acid-modified nitrile copolymer latex composition prepared in each of Examples and Comparative Examples through a 200 mesh size sieve The weight of the coagulum formed in the latex composition was separated, and the weight percentage was calculated based on the total weight of the latex composition.
- Example 1 to 6 prepared according to the present invention compared to Comparative Example 1 prepared using only acrylonitrile, 1,3-butadiene and methacrylic acid as monomers, It exhibits tensile strength, elongation, and 300% modulus of equivalent level or more, and has excellent durability and chemical resistance, and excellent workability due to no occurrence of cinerisis.
- the content of coagulated in the carboxylic acid-modified nitrile copolymer latex composition is less than 0.0.1% by weight was excellent in the polymerization stability, it was confirmed that the long-term storage stability is excellent.
- the present inventors from the above results, when using the latex composition for deep molding containing a carboxylic acid-modified nitrile copolymer latex composition according to the present invention, when manufacturing a dip molded article such as gloves, the tension of the manufactured dip molded article Increasing the strength, lowering the modulus of 300% to improve the fit, and at the same time, it was confirmed that the durability, chemical resistance and workability of the dip molded product, and to reduce the content of residual monomers.
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Abstract
Description
| 구분 | 실시예 | ||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | ||||
| 단량체 조성 및 투입시기 | AN 2) | 조성(wt%) | 32 | 30 | 32 | 30 | 32 | 30 | |
| BD 3) | 조성(wt%) | 59 | 58 | 60.5 | 58 | 59 | 58 | ||
| MA 4) | 조성(wt%) | 6 | 6 | 6 | 6 | 6 | 6 | ||
| 2-HEMA 5) | 조성(wt%) | 3 | 6 | 1.5 | 3 | 3 | 3 | 6 | |
| 투입시기(% 1)) | 0 | 0 | 0 | 0 | 30 | 0 | 0 | ||
| 계 | 조성(wt%) | 100 | 100 | 100 | 100 | 100 | 100 | ||
| 가교제 조성물 | 유황 | (중량부) | 1 | 1 | 1 | 1 | - | - | |
| ZDBC 10) | (중량부) | 0.7 | 0.7 | 0.7 | 0.7 | - | - | ||
| 산화아연 | (중량부) | 1.5 | 1.5 | 1.5 | 1.5 | - | - | ||
| 알루미늄 아세틸아세토네이트 | (중량부) | - | - | - | - | 2 | - | ||
| 알루미늄 글리콜레이트 | (중량부) | - | - | - | - | - | 2 | ||
| 인장특성 | 인장강도 | (MPa) | 36.2 | 38.1 | 35.5 | 37.5 | 36.3 | 38.6 | |
| 신율 | (%) | 555 | 504 | 572 | 566 | 630 | 564 | ||
| 300% 모듈러스 | (MPa) | 6.5 | 7.9 | 5.3 | 6.0 | 4.9 | 5.9 | ||
| 내구성 | (hour) | >4 | >4 | >4 | >4 | >4 | >4 | ||
| 내화학성 | (min) | >480 | >480 | >480 | >480 | >480 | >480 | ||
| 시네리시스 | (min) | X | X | 3 | X | 2.5 | 4 | ||
| 딥 성형품의 TVOC | (ppm) | 0.27 | 0.36 | 0.2 | 0.45 | 0.11 | 0.14 | ||
| 중합 안정성 | (wt%) | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | ||
| 장기 저장 안정성 | ◎ | ○ | ◎ | ◎ | ◎ | ◎ | |||
| 1) %: 중합 전환율, 0%는 중합 개시 전에 투입된 것을 의미함2) AN: 아크릴로니트릴3) BD: 1,3-부타디엔4) MA: 메타크릴산5) 2-HEMA: 2-히드록시에틸 메타크릴레이트10) ZDBC: 디-n-부틸디티오카바메이트 아연(가황촉진제) | |||||||||
| 구분 | 비교예 | |||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||
| 단량체 조성 및 투입시기 | AN 2) | 조성(wt%) | 32 | 27 | 32 | 30 | 32 | 32 | 32 | 32 |
| BD 3) | 조성(wt%) | 62 | 56.5 | 61.9 | 58 | 59 | 59 | 59 | 59 | |
| MA 4) | 조성(wt%) | 6 | 4.5 | 6 | 6 | 6 | 6 | 6 | 6 | |
| 2-HEMA 5) | 조성(wt%) | - | 12 | 0.1 | 6 | - | - | - | - | |
| 투입시기(% 1)) | - | 0 | 0 | 70 | - | - | - | - | ||
| 2-HEA 6) | 조성(wt%) | - | - | - | - | 3 | - | - | - | |
| 투입시기(% 1)) | - | - | - | - | 0 | - | - | - | ||
| 2-HPMA 7) | 조성(wt%) | - | - | - | - | - | 3 | - | - | |
| 투입시기(% 1)) | - | - | - | - | - | 0 | - | - | ||
| 4-HBA 8) | 조성(wt%) | - | - | - | - | - | - | 3 | - | |
| 투입시기(% 1)) | - | - | - | - | - | - | 0 | - | ||
| 4-HBMA 9) | 조성(wt%) | - | - | - | - | - | - | - | 3 | |
| 투입시기(% 1)) | - | - | - | - | - | - | - | 0 | ||
| 계 | (wt%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
| 가교제 조성물 | 유황 | (중량부) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| ZDBC 10) | (중량부) | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | |
| 산화아연 | (중량부) | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | |
| 알루미늄 아세틸아세토네이트 | (중량부) | - | - | - | - | - | - | - | - | |
| 알루미늄 글리콜레이트 | (중량부) | - | - | - | - | - | - | - | - | |
| 인장특성 | 인장강도 | (MPa) | 36 | 30 | 36.1 | 35.7 | 33.7 | 34.8 | 33.0 | 33.5 |
| 신율 | (%) | 548 | 453 | 550 | 546 | 568 | 526 | 561 | 548 | |
| 300% 모듈러스 | (MPa) | 6.1 | 9.6 | 6.2 | 6.3 | 5.5 | 6.4 | 5.0 | 5.1 | |
| 내구성 | (hour) | 2 | >4 | 2 | 3 | 2 | 3 | 2 | 2 | |
| 내화학성 | (min) | 40 | >480 | 40 | 150 | 142 | 180 | 100 | 90 | |
| 시네리시스 | (min) | 1 | X | 1 | 4 | 1 | 1 | 3 | 3 | |
| 딥 성형품의 TVOC | (ppm) | 0.31 | 0.4 | 0.28 | 0.98 | 0.64 | 0.76 | 0.68 | 0.71 | |
| 중합 안정성 | (wt%) | <0.01 | <0.01 | <0.01 | 1 | 2 | 0.9 | 1.5 | 1.7 | |
| 장기 저장 안정성 | ◎ | X | ◎ | X | ○ | ○ | △ | △ | ||
| 1) %: 중합 전환율, 0%는 중합 개시 전에 투입된 것을 의미함2) AN: 아크릴로니트릴3) BD: 1,3-부타디엔4) MA: 메타크릴산5) 2-HEMA: 2-히드록시에틸 메타크릴레이트6) 2-HEA: 2-히드록시에틸 아크릴레이트7) 2-HPA: 2-히드록시프로필 아크릴레이트8) 4-HBA: 4-히드록시부틸 아크릴레이트9) 4-HBMA: 4-히드록시부틸 메타크릴레이트10) ZDBC: 디-n-부틸디티오카바메이트 아연(가황촉진제) | ||||||||||
Claims (12)
- 카르본산 변성 니트릴계 공중합체를 포함하는 라텍스 조성물에 있어서,카르본산 변성 니트릴계 공중합체는 2-히드록시에틸 메타크릴레이트 단량체 유래 반복단위를 0.1 중량% 초과 내지 12 중량% 미만으로 포함하고,카르본산 변성 니트릴계 공중합체 라텍스 조성물 내 응고물의 함량이 1 중량% 미만인 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제1항에 있어서,상기 카르본산 변성 니트릴계 공중합체는 2-히드록시에틸 메타크릴레이트 단량체 유래 반복단위를 1.5 중량% 내지 6 중량%로 포함하는 것인 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제1항에 있어서,상기 카르본산 변성 니트릴계 공중합체는, 공액디엔계 단량체 유래 반복단위, 에틸렌성 불포화 니트릴계 단량체 유래 반복단위, 에틸렌성 불포화산 단량체 유래 반복단위 및 2-히드록시에틸 메타크릴레이트 단량체 유래 반복단위를 포함하는 것인 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제1항에 있어서,상기 카르본산 변성 니트릴계 공중합체는, 공액디엔계 단량체 유래 반복단위 40 중량% 내지 80 중량%, 에틸렌성 불포화 니트릴계 단량체 유래 반복단위 10 중량% 내지 50 중량%, 에틸렌성 불포화산 단량체 유래 반복단위 0.1 중량% 내지 10 중량% 및 2-히드록시에틸 메타크릴레이트 단량체 유래 반복단위 0.1 중량% 초과 내지 12 중량% 미만을 포함하는 것인 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 제1항에 있어서,상기 카르본산 변성 니트릴계 공중합체 라텍스 조성물은, 카르본산 변성 니트릴계 공중합체 라텍스 조성물 내 응고물의 함량이 0.01 중량% 미만인 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 단량체 혼합물 전체 함량에 대하여, 2-히드록시에틸 메타크릴레이트 단량체를 0.1 중량% 초과 내지 12 중량% 미만으로 포함하는 단량체 혼합물을 중합하여 카르본산 변성 니트릴계 공중합체를 포함하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물을 제조하는 단계(S10)를 포함하고,상기 단량체 혼합물에 포함되는 2-히드록시에틸 메타크릴레이트 단량체는 상기 (S10) 단계의 중합 개시 전에 전량 투입; 중합 개시 전에 일부 투입하고, 중합 전환율 20 % 내지 60 %인 시점에 잔량 투입; 또는 중합 전환율 20 % 내지 60 %인 시점에 전량 투입되는 것인 카르본산 변성 니트릴계 공중합체 라텍스 조성물 제조방법.
- 제6항에 있어서,상기 단량체 혼합물은 공액디엔계 단량체, 에틸렌성 불포화 니트릴계 단량체, 에틸렌성 불포화산 단량체 및 2-히드록시에틸 메타크릴레이트 단량체를 포함하는 것인 카르본산 변성 니트릴계 공중합체 라텍스 조성물 제조방법.
- 제1항 내지 제5항 중 어느 한 항에 따른 카르본산 변성 니트릴계 공중합체 라텍스 조성물 및 가교제 조성물을 포함하는 딥 성형용 라텍스 조성물.
- 제8항에 있어서,상기 가교제 조성물은 가황제 및 가황촉진제를 포함하는 것인 딥 성형용 라텍스 조성물.
- 제8항에 있어서,상기 가교제 조성물은 다가 금속 양이온 화합물을 포함하는 것인 딥 성형용 라텍스 조성물.
- 제10항에 있어서,상기 다가 금속 양이온 화합물은 알루미늄 글리콜레이트(aluminium glycolate), 알루미늄 아세틸아세토네이트(aluminium acetylacetonate), 알루미늄 락테이트(aluminium lactate) 및 알루미늄 타르트레이트(aluminium tartrate)로 이루어진 군으로부터 선택된 1종 이상인 딥 성형용 라텍스 조성물.
- 제8항에 따른 딥 성형용 라텍스 조성물 유래층을 포함하는 성형품.
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| MYPI2020001891A MY203005A (en) | 2018-03-08 | 2019-02-11 | Carbonic acid-modified nitrile-based copolymer latex composition, production method therefor, latex composition containing same for dip molding, and molded product molded therefrom |
| EP19763925.5A EP3763787B1 (en) | 2018-03-08 | 2019-02-11 | Carbonic acid-modified nitrile-based copolymer latex composition, production method therefor, latex composition containing same for dip molding, and molded product molded therefrom |
| CN201980005081.5A CN111225952B (zh) | 2018-03-08 | 2019-02-11 | 羧酸改性的腈类共聚物胶乳组合物、其制备方法、用于浸渍成型的胶乳组合物和模制品 |
| JP2020531096A JP7025548B2 (ja) | 2018-03-08 | 2019-02-11 | カルボン酸変性ニトリル系共重合体ラテックス組成物、その製造方法、これを含むディップ成形用のラテックス組成物およびこれから成形された成形品 |
| US16/759,208 US11739199B2 (en) | 2018-03-08 | 2019-02-11 | Carboxylic acid-modified nitrile-based copolymer latex composition, production method therefor, latex composition containing same for dip molding, and molded product molded therefrom |
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| KR1020180027279A KR101920009B1 (ko) | 2018-03-08 | 2018-03-08 | 카르본산 변성 니트릴계 공중합체 라텍스 조성물, 이의 제조방법, 이를 포함하는 딥 성형용 라텍스 조성물 및 이로부터 성형된 성형품 |
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- 2019-02-11 US US16/759,208 patent/US11739199B2/en active Active
- 2019-02-11 MY MYPI2020001891A patent/MY203005A/en unknown
- 2019-02-11 JP JP2020531096A patent/JP7025548B2/ja active Active
- 2019-02-11 EP EP19763925.5A patent/EP3763787B1/en active Active
- 2019-02-11 WO PCT/KR2019/001635 patent/WO2019172539A1/ko not_active Ceased
- 2019-02-11 CN CN201980005081.5A patent/CN111225952B/zh active Active
- 2019-02-15 TW TW108105091A patent/TWI701268B/zh active
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| JP2003342303A (ja) * | 2002-03-19 | 2003-12-03 | Nippon Zeon Co Ltd | ディップ成形用ラテックス、ディップ成形用組成物およびディップ成形物 |
| KR20120069222A (ko) * | 2010-12-20 | 2012-06-28 | 주식회사 엘지화학 | 딥 성형용 라텍스 조성물 및 이를 사용하여 제조된 니트릴 고무 제품 |
| KR20130055334A (ko) * | 2011-11-18 | 2013-05-28 | 주식회사 엘지화학 | 카르본산 변성 니트릴계 공중합체 조성물 및 이로부터 제조된 딥 성형품 |
| KR20170094156A (ko) * | 2014-12-12 | 2017-08-17 | 신쏘머 에스디엔. 비에이치디. | 딥 성형 적용을 위한 중합체 라텍스 조성물 |
| KR20170060793A (ko) * | 2015-11-25 | 2017-06-02 | 주식회사 엘지화학 | 딥 성형용 라텍스 조성물 및 이로부터 제조된 성형품 |
| KR101920009B1 (ko) * | 2018-03-08 | 2018-11-19 | 주식회사 엘지화학 | 카르본산 변성 니트릴계 공중합체 라텍스 조성물, 이의 제조방법, 이를 포함하는 딥 성형용 라텍스 조성물 및 이로부터 성형된 성형품 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113767124A (zh) * | 2020-03-31 | 2021-12-07 | 株式会社Lg化学 | 羧酸改性的腈类共聚物胶乳和包含其的用于浸渍成型的胶乳组合物以及由所述组合物形成的制品 |
| US11834537B2 (en) | 2020-03-31 | 2023-12-05 | Lg Chem, Ltd. | Carboxylic acid modified-nitrile based copolymer latex and latex composition for dip-forming comprising the copolymer latex and article formed by the composition |
| CN113767124B (zh) * | 2020-03-31 | 2024-01-09 | 株式会社Lg化学 | 羧酸改性的腈类共聚物胶乳和包含其的用于浸渍成型的胶乳组合物以及由组合物形成的制品 |
| US11873391B2 (en) | 2020-03-31 | 2024-01-16 | Lg Chem, Ltd. | Carboxylic acid modified-nitrile based copolymer latex and latex composition for dip-forming comprising the copolymer latex and article formed by the composition |
| US12157817B2 (en) | 2020-03-31 | 2024-12-03 | Lg Chem, Ltd. | Carboxylic acid modified-nitrile based copolymer latex |
| US12157816B2 (en) | 2020-03-31 | 2024-12-03 | Lg Chem, Ltd. | Carboxylic acid modified-nitrile based copolymer latex and latex composition for dip-forming comprising the copolymer latex and article formed by the composition |
| US12173158B2 (en) | 2020-03-31 | 2024-12-24 | Lg Chem, Ltd. | Carboxylic acid modified-nitrile based copolymer latex |
| US12173092B2 (en) | 2020-03-31 | 2024-12-24 | Lg Chem, Ltd. | Carboxylic acid modified-nitrile based copolymer latex |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111225952A (zh) | 2020-06-02 |
| US20200317893A1 (en) | 2020-10-08 |
| EP3763787A1 (en) | 2021-01-13 |
| US11739199B2 (en) | 2023-08-29 |
| TWI701268B (zh) | 2020-08-11 |
| MY203005A (en) | 2024-06-01 |
| EP3763787A4 (en) | 2021-05-12 |
| JP2021505730A (ja) | 2021-02-18 |
| EP3763787B1 (en) | 2023-08-23 |
| CN111225952B (zh) | 2022-04-12 |
| KR101920009B1 (ko) | 2018-11-19 |
| JP7025548B2 (ja) | 2022-02-24 |
| TW201938610A (zh) | 2019-10-01 |
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