WO2015072801A1 - 카르본산 변성 니트릴계 공중합체 라텍스 조성물, 이의 제조방법 및 이를 포함하는 딥 성형용 라텍스 조성물 - Google Patents
카르본산 변성 니트릴계 공중합체 라텍스 조성물, 이의 제조방법 및 이를 포함하는 딥 성형용 라텍스 조성물 Download PDFInfo
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- WO2015072801A1 WO2015072801A1 PCT/KR2014/011032 KR2014011032W WO2015072801A1 WO 2015072801 A1 WO2015072801 A1 WO 2015072801A1 KR 2014011032 W KR2014011032 W KR 2014011032W WO 2015072801 A1 WO2015072801 A1 WO 2015072801A1
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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
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
-
- 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
- C08F236/12—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 with nitriles
-
- 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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/08—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of nitriles
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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
Definitions
- the present invention relates to a stabilized carboxylic acid-modified nitrile copolymer latex composition comprising a reactive emulsifier, a method for preparing the same, and a latex composition for dip molding comprising the same.
- Disposable rubber gloves used in a variety of everyday life, such as household, food, electronics, medical, etc. are made by dip molding of natural rubber or carboxylic acid-modified nitrile copolymer latex.
- carboxylic acid-modified nitrile-based gloves have been in the spotlight in the disposable gloves market due to allergic problems due to natural protein of natural rubber and unstable supply and demand.
- the carboxylic acid-modified nitrile-based gloves are made by dipping a mold coated with a coagulant on a latex made by emulsion polymerization.
- a large amount of emulsifiers are used in the emulsion polymerization, and these emulsifiers become bubbles causing pinholes by foaming during the manufacture of gloves.
- the antifoaming agent may act as a cause of various glove defects by the antifoaming agent itself as a foreign material, and also has a problem of increasing the manufacturing process time to the maturity and degree.
- the emulsifier when the emulsifier is not sufficiently removed in the leaching process during the manufacturing process, the remaining in the glove, the foaming or slipping occurs when the user wears the glove after contact with moisture.
- the emulsifiers remaining in gloves are one of the most residual chemicals in gloves, along with calcium and release agents, which are known to adversely affect the quality of gloves.
- the present inventors have studied a stable latex that does not degrade the wear feeling by generating a large amount of foam during the latex polymerization or eluted on the surface of the dip molded product, while adding a reactive emulsifier different from a conventional adsorption / desorption emulsifier
- the present invention was completed by confirming that the latex was prepared to obtain a stable latex even in a small amount of use without generating a large amount of foam.
- An object of the present invention is to reduce the foam generated during the latex polymerization, carboxylic acid-modified nitrile-based nitrile containing a reactive emulsifier, which can produce a stable latex of high quality without the addition of antifoaming agent for foam removal or aging process It is to provide a copolymer latex composition.
- Another object of the present invention is to provide a method for producing the latex composition.
- Still another object of the present invention is to provide a latex composition for dip molding including the latex composition.
- the present invention comprises 0.1 to 10 parts by weight of the reactive emulsifier with respect to 100 parts by weight of the monomer mixture, the monomer mixture is 40 to 88% by weight of the conjugated diene monomer; 10 wt% to 50 wt% ethylenically unsaturated nitrile monomer; And it provides a carboxylic acid-modified nitrile copolymer latex composition comprising 0.1 to 10% by weight of ethylenically unsaturated acid monomer.
- the present invention also provides a method for producing a carboxylic acid-modified nitrile copolymer latex composition comprising a conjugated diene monomer, an ethylenically unsaturated nitrile monomer, and an ethylenically unsaturated acid monomer, wherein the reactive emulsifier is added before the polymerization is initiated.
- the present invention provides a method for preparing a carboxylic acid-modified nitrile copolymer latex composition comprising the step of adding and reacting at the same time with the monomer or by adding a reactive emulsifier at a conversion rate of 5% to 80% after polymerization.
- the present invention provides a latex composition for dip molding comprising the carboxylic acid-modified nitrile copolymer latex composition.
- the carboxylic acid-modified nitrile copolymer latex composition comprising the reactive emulsifier according to the present invention includes a reactive emulsifier, which is different from a conventional adsorption / desorption-type emulsifier, thereby reducing the occurrence of bubbles during polymerization to improve the quality of the latex. Not only does it improve, but also does not require the addition of antifoaming agent for foam removal, or the aging process can prevent the defect caused by the antifoaming agent has the effect of simplifying the manufacturing process.
- the latex composition for dip molding of the present invention includes the stable carboxylic acid-modified nitrile copolymer latex composition, an emulsifier does not elute to the surface even when the dip molded article is manufactured, thereby providing an excellent fit.
- the present invention provides a carboxylic acid-modified nitrile copolymer latex composition
- a carboxylic acid-modified nitrile copolymer latex composition comprising a conjugated diene monomer, an ethylenically unsaturated nitrile monomer, an ethylenically unsaturated acid monomer, and a reactive emulsifier.
- Latex composition according to an embodiment of the present invention, 0.1 to 10 parts by weight of the reactive emulsifier with respect to 100 parts by weight of the monomer mixture, the monomer mixture is 40% to 88% by weight of the conjugated diene monomer; 10 wt% to 50 wt% ethylenically unsaturated nitrile monomer; And 0.1 wt% to 10 wt% of an ethylenically unsaturated acid monomer.
- the monomer mixture according to an embodiment of the present invention may include a conjugated diene monomer in an amount of 40 wt% to 88 wt%, preferably 45 wt% to 80 wt%.
- a conjugated diene monomer in an amount of 40 wt% to 88 wt%, preferably 45 wt% to 80 wt%.
- the conjugated diene-based monomer is included in less than 40% by weight, the dip molded product using the same may be hard and the wearing comfort may be lowered.
- the conjugated diene monomer is included in an amount of more than 88% by weight, the oil resistance of the dip molded product is lowered and the tensile strength is increased. Can be reduced.
- the conjugated diene monomer may be 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-butadiene, 1,3-pentadiene, isoprene or a combination thereof, preferably Preferably 1,3-butadiene or isoprene, more preferably 1,3-butadiene.
- the monomer mixture according to one embodiment of the present invention may include 10 wt% to 50 wt% of ethylenically unsaturated nitrile monomer, but may preferably include 15 wt% to 45 wt%. If the ethylenically unsaturated nitrile monomer is included in less than 10% by weight, the oil resistance of the dip molded product using the same may be lowered, the tensile strength may be reduced, and if the amount is more than 50% by weight, the dip molded product is hard. And wear can be reduced.
- the ethylenically unsaturated nitrile monomer may be acrylonitrile, methacrylonitrile, fumaronitrile, ⁇ -chloronitrile, ⁇ -cyano ethyl acrylonitrile or a combination thereof, preferably acrylonitrile or methacryl Nitrile, more preferably acrylonitrile.
- the monomer mixture according to an embodiment of the present invention may include 0.1 wt% to 10 wt% of ethylenically unsaturated acid monomer, and may preferably include 0.5 wt% to 9 wt%, and more preferably. Preferably from 1% to 8% by weight. If the ethylenically unsaturated acid monomer is included in less than 0.1% by weight, the tensile strength of the dip molded article may be lowered. If it is included in an amount of more than 10% by weight, the dip molded article may be hardened and the fit may be reduced.
- the said ethylenically unsaturated acid monomer is an ethylenically unsaturated monomer which has a carboxyl group, a sulfonic acid group, or an acid anhydride group. More specifically, the ethylenically unsaturated acid monomers are acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, maleic anhydride, citraconic anhydride, styrene sulfonic acid, monobutyl fumaric acid, monobutyl maleic acid, mono-2-hydric maleic acid Roxy propyl or a combination thereof, but may preferably be acrylic acid, methacrylic acid, itaconic acid, maleic acid or fumaric acid, more preferably methacrylic acid.
- the carboxylic acid-modified nitrile copolymer latex composition according to the embodiment of the present invention may include a reactive emulsifier in an amount of 0.1 parts by weight to 10 parts by weight with respect to 100 parts by weight of the monomer mixture, and preferably 0.1 parts by weight. To 5 parts by weight.
- emulsifiers have an important influence on the polymerization rate, particle size and distribution, molecular weight, particle shape, etc. in emulsion polymerization, and ionic, low molecular weight adsorption / desorption emulsifiers which are commonly used are the same as copolymer latex to be formed. It is not chemically bound and agglomerates when preparing a dip molded product using the copolymer latex, and can be easily phase separated from the copolymer latex. The phase separated emulsifier is desorbed when wet with water, causing scratches on the surface of the emulsifier. . This may adversely affect the physical properties of the dip molded article.
- the reactive emulsifier according to an embodiment of the present invention can chemically bond with the copolymer latex to be formed, thereby increasing the polymerization rate and reducing the occurrence of foam during polymerization of the copolymer latex. Therefore, when the dip molded article is manufactured using the same, the reactive emulsifier may be phase-separated from the latex to increase thermal stability, and it may be prevented from being eluted to the surface of the dip molded article. Thus, the deterioration of the quality of the final dip molded article can be prevented.
- the reactive emulsifiers are polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate, sodium 2-hydroxy-3- (methacryloyloxy) propane-1-sulfonate, sodium 11-methacrylo 1 group selected from the group consisting of yl undecane-1-yl-sulfate, sodium 11-crotonoyl undecane-1-yl-sulfate, sodium dodecyl aryl sulfosuccinate and sodium 3-sulfopropyltetradecyl malate It may be more than one, preferably polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate, sodium dodecyl aryl sulfosuccinate or a combination thereof. In this case, the polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate may be 5 to 10 repeating units of the oxyethylene group (EO).
- the carboxylic acid-modified nitrile copolymer latex composition may be used by adding an anionic surfactant, and examples of the anionic surfactant are sodium dodecylbenzene sulfonate, alkylbenzene sulfonate, aliphatic sulfonate, And sulfuric acid ester salts of higher alcohols, ⁇ -olefin sulfonates and alkyl ether sulfuric acid ester salts.
- the anionic surfactant may be used in an amount of 0.1 parts by weight to 10 parts by weight with respect to 100 parts by weight of the total monomer mixture, and preferably 0.1 parts by weight to 3 parts by weight.
- the monomer mixture of the present invention may preferably further comprise an ethylenically unsaturated monomer within 20 parts by weight based on 100 parts by weight of the monomer mixture, particularly preferably 20 parts by weight or less.
- the ethylenically unsaturated monomer is included in an amount of more than 20 parts by weight, the balance between the fit and the tensile strength may not be balanced, thereby reducing the quality of the dip molded product.
- the ethylenically unsaturated monomers include styrene, alkyl styrene, vinyl naphthalene, fluoroethyl vinyl ether, (meth) acrylamide, N-methylol (meth) acrylamide, N, N-dimethylol (meth) acrylamide, N- Methoxy methyl (meth) acrylamide, N-propoxy methyl (meth) acrylamide, vinyl pyridine, vinyl nolvonene, dicyclo pentadiene, 1,4-hexadiene, methyl (meth) acrylate, ethyl (meth) acrylate Butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, trifluoroethyl (meth) acrylate, tetrafluoropropyl (meth) acrylate, dibutyl maleate, dibutyl fumarate, diethyl maleate, (
- the carboxylic acid-modified nitrile-based latex composition of the present invention may include 0.01 parts by weight to 2 parts by weight of a polymerization initiator and 0.1 parts by weight to 0.9 parts by weight of a molecular weight modifier with respect to 100 parts by weight of the monomer mixture, preferably polymerization 0.02 parts by weight to 1.5 parts by weight of the initiator and 0.2 parts by weight to 0.7 parts by weight of the molecular weight regulator.
- the polymerization initiator of the present invention is not particularly limited, and examples thereof include inorganic peroxides such as sodium persulfate, potassium persulfate, 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; Nitrogen compounds such as azobis isobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexanecarbonitrile, azobisisobutyric acid (butyl acid) methyl
- the said molecular weight modifier of this invention is not specifically limited,
- mercaptans such as (alpha) -methylstyrene dimer, t-dodecyl mercaptan, n-dodecyl mercaptan, octyl mercaptan;
- Halogenated hydrocarbons such as carbon tetrachloride, methylene chloride and methylene bromide
- Sulfur-containing compounds such as tetraethyl diuram disulfide, dipentamethylene diuram disulfide, diisopropylquixanthogen disulfide and the like.
- the present invention also provides a method for producing the carboxylic acid-modified nitrile copolymer latex composition comprising a conjugated diene monomer, an ethylenically unsaturated nitrile monomer, an ethylenically unsaturated acid monomer and a reactive emulsifier.
- Additives such as the monomers, reactive emulsifiers and polymerization initiators and molecular weight regulators that may be further added are as mentioned above.
- the polymerization is started by adding a reactive emulsifier simultaneously with each monomer included in the carboxylic acid-modified nitrile copolymer latex composition before starting the polymerization reaction, or After the polymerization reaction of the monomers is started, the polymerization is performed by separating and adding the monomer at a conversion rate of 5% to 80%.
- the reactive emulsifier may be added at a conversion time of 40% to 70% after the start of polymerization.
- the stability of the latex composition can be further improved by distributing the reactive emulsifier outside the monomer mixture particles.
- the conversion rate may be measured by a method commonly known in the art.
- a predetermined amount of samples are taken from the reaction mixture for preparing a carboxylic acid-modified nitrile copolymer latex composition comprising a reaction composition such as a monomer mixture and a reactive emulsifier at regular time intervals, and the solid content is measured.
- the polymerization conversion rate was calculated by the following formula.
- M s is the weight of the dried copolymer latex
- M o is the weight of the reactive emulsifier and initiator
- M p is the weight of the polymer 100% polymerized.
- the carboxylic acid-modified nitrile copolymer latex composition of the present invention can be prepared through emulsion polymerization commonly used in the art, and the mixing of the components of each latex composition is not particularly limited, and each component, such as a conjugated diene monomer ,
- additives such as chelating agents, dispersing agents, pH adjusting agents, deoxygenating agents, particle size adjusting agents, anti-aging agents, and oxygen scavenger may be additionally used as necessary. Typically may be carried out in a temperature range of 10 ° C to 90 ° C, preferably 25 ° C to 75 ° C.
- the present invention provides a latex composition for dip molding comprising the carboxylic acid-modified nitrile copolymer latex composition.
- the latex composition for dip molding of the present invention may include 80 wt% to 99 wt% of the carboxylic acid-modified nitrile copolymer latex composition prepared using a reactive emulsifier, preferably 85 wt% to 98 wt%. It may be included in%, more preferably 88% to 97% by weight.
- the dip molding latex composition may have a solid content concentration of 10% by weight to 40% by weight, but preferably has a solid content concentration of 15% by weight to 35% by weight. More preferably, it may be 18% to 33% by weight.
- the dip molding latex composition may have a pH of 8.0 to 12, preferably 9 to 11, and more preferably 9.3 to 10.5.
- the latex composition for dip molding including the carboxylic acid-modified nitrile copolymer latex composition of the present invention can be easily used for the production of dip molded articles.
- the dip molded article is not particularly limited, but may be a household glove, an industrial glove, a condom or a catheter.
- a monomer mixture consisting of 29% by weight of acrylonitrile, 65% by weight of 1,4-butadiene and 6% by weight of methacrylic acid and 0.5 parts by weight of t-dodecyl mercaptan, poly 2 parts by weight of oxyethylene-1- (aryloxymethyl) alkyl ether sulfonate (aquaron KH-10), 1 part by weight of sodium dodecylbenzene sulfonate, 0.6 part by weight of potassium persulfate, 140 parts by weight of water, and then 40 ° C. The polymerization was initiated at the temperature of.
- the polymerization was carried out by raising the temperature to 55 ° C, and when the conversion rate reached 94%, 0.3 parts by weight of ammonium hydroxide was added to stop the polymerization. Thereafter, the unreacted material was removed through a deodorizing process, and ammonia water, an antioxidant, and an antifoam were added to obtain a carboxylic acid-modified nitrile copolymer latex having a solid content of 45% and a pH of 8.5.
- Example 2 The same procedure as in Example 1 was repeated except that 3 parts by weight of polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate (aquaron KH-10) was used and no sodium dodecylbenzene sulfonate was used. A carboxylic acid-modified nitrile copolymer latex of 45% solids concentration and pH 8.5 was obtained through.
- polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate aquaron KH-10
- Example 2 Through the same method as in Example 1, except that 2 parts by weight of sodium dodecyl aryl sulfosuccinate was used instead of polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate, the solid content was 45%, pH 8.5 A carboxylic acid-modified nitrile copolymer latex was obtained.
- Example 2 Through the same method as in Example 1, except that 3 parts by weight of sodium dodecylbenzene sulfonate was not used without using polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate (aquaron KH-10). A carboxylic acid-modified nitrile copolymer latex was obtained.
- the main acid-modified nitrile copolymer latex was obtained.
- the degree of foaming was measured after putting 20 g of each latex into the measuring cylinder, blocking the inlet, and shaking it vigorously up and down 20 times.
- Examples 1 to 1 prepared using polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate or sodium dodecyl aryl sulfosuccinate, which are reactive emulsifiers according to the present invention.
- the carboxylic acid-modified nitrile copolymer latex of Example 6 exhibited a significantly lower degree of foaming compared to the carboxylic acid-modified nitrile copolymer latex of Comparative Example 1 without using a reactive emulsifier.
- the foaming degree of the carboxylic acid-modified nitrile copolymer latex of Comparative Example 1 was increased 1.8 times as compared to the foaming degree of the carboxylic acid-modified nitrile copolymer latex of Examples 1 to 6, as much as 18 Pear increased.
- the reactive emulsifier of the present invention can effectively suppress bubbles generated during latex polymerization.
- the syneresis of each latex was measured through the following steps.
- potassium hydroxide solution sulfur 1 wt%, ZDBC 0.5 wt%, zinc oxide 1.5 wt%, titanium oxide 0.5 wt%, and an appropriate amount of a dispersant and secondary distilled water were added to each of the latex to a solid concentration of 20% and a pH of 10.0.
- Each dip molding latex composition was prepared.
- a coagulant solution was prepared by mixing 22 wt% calcium nitrate, 69.5 wt% water, 8 wt% calcium carbonate, and 0.5 wt% wetting agent (Teric 320, Huntsman Corporation, Australia) separately from the latex composition for dip molding. Then, the hand-shaped ceramic mold was immersed in the coagulant solution for 1 minute, taken out, and dried at 70 ° 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 composition for dip molding for 1 minute, pulled up, and the time taken for the drop to fall from the hand-shaped mold was measured.
- Examples 1 to 1 prepared using polyoxyethylene-1- (aryloxymethyl) alkyl ether sulfonate or sodium dodecyl aryl sulfosuccinate, which are reactive emulsifiers according to the present invention.
- the cine acid-modified nitrile copolymer latex of Example 6 was significantly superior to the carboxylic acid-modified nitrile copolymer latex of Comparative Example 2 prepared using a polymeric reactive emulsifier other than the reactive emulsifier according to the present invention. It confirmed that it exhibits a cis characteristic.
- carboxylic acid-modified nitrile copolymer latex is affected by the foaming phenomenon and the syneresis characteristics according to the emulsifier added at the time of manufacture, and the type of the emulsifier, such as ionic emulsifier, nonionic emulsifier, reactive emulsifier, etc.
- the type of the emulsifier such as ionic emulsifier, nonionic emulsifier, reactive emulsifier, etc.
- a large amount of bubbles are generated or the cinerissis property is significantly lowered.
- the above result means that the reactive emulsifier according to the present invention has the effect of imparting excellent syneresis properties while suppressing the foaming.
- Dip molded products were prepared using the carboxylic acid-modified nitrile copolymer latex prepared in Example 1.
- a dip molded article was obtained in the same manner as in Example 4 except that the dip molded article was manufactured using the carboxylic acid-modified nitrile copolymer latex prepared in Example 2.
- a dip molded article was obtained in the same manner as in Example 4, except that the dip molded article was manufactured using the carboxylic acid-modified nitrile copolymer latex prepared in Example 3.
- a dip molded article was obtained in the same manner as in Example 7, except that the dip molded article was manufactured using the carboxylic acid-modified nitrile copolymer latex prepared in Example 4.
- Dip molded products were obtained in the same manner as in Example 7, except that the dip molded products were manufactured using the carboxylic acid-modified nitrile copolymer latex prepared in Example 5.
- a dip molded article was obtained in the same manner as in Example 7, except that the dip molded article was manufactured using the carboxylic acid-modified nitrile copolymer latex prepared in Example 6.
- a dip molded article was obtained in the same manner as in Example 4, except that a dip molded article was manufactured using a carboxylic acid-modified nitrile copolymer latex containing no reactive emulsifier prepared in 1 above.
- Dip molded articles were obtained in the same manner as in Example 4, except that the dip molded articles were manufactured using the carboxylic acid-modified nitrile copolymer latex prepared in Comparative 2 above.
- Tensile strength, elongation, and stress at 300% elongation were measured by fabricating dumbbell shaped specimens in accordance with ASTMD-412. Each specimen was pulled at an elongation rate of 500 mm / min, and the stress at 300% elongation, the tensile strength at break and the elongation at break were measured. The results are shown in Table 3.
- the degree of foaming was measured while changing the riching conditions of each dip molded product. Using the carboxylic acid-modified nitrile-based copolymer latex described above to prepare a dip molded article in the same manner as in Example 4, but the conditions at the time of riching at 50 °C 1 minute, 30 °C 1 minute, 50 °C 30 30 10 seconds at seconds and 50 ° C., respectively. 2 ml of distilled water was added to each prepared dip molded product, and the degree of foaming was relatively evaluated by the 10-point method. Higher scores indicate no bubbles in the glove. The results are shown in Table 4 below.
- the dip molded articles of Examples 4 to 6 using the carboxylic acid-modified nitrile copolymer latex prepared using the reactive emulsifier according to the present invention do not use the reactive emulsifier.
- Comparative Example 2 prepared using the dip molded article of Comparative Example 3 using the carboxylic acid-modified nitrile copolymer latex of Comparative Example 1 prepared using a conventional emulsifier and a reactive emulsifier other than the reactive emulsifier according to the present invention.
- the degree of foaming on the surface was significantly reduced while maintaining similar mechanical properties. This means that the reactive emulsifier of the present invention not only retains the properties of the latex but also enhances stability and does not elute to the surface even after dip molding.
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Abstract
Description
구분 | 거품발생 높이(mm) |
실시예 1 | 10 |
실시예 2 | 2 |
실시예 3 | 12 |
실시예 4 | 20 |
실시예 5 | 5 |
실시예 6 | 12 |
비교예 1 | 36 |
비교예 2 | 21 |
구분 | 시네리시스(min) |
실시예 1 | 2.5 |
실시예 2 | 2.6 |
실시예 3 | 2 |
실시예 4 | 2.5 |
실시예 5 | 2.6 |
실시예 6 | 2 |
비교예 1 | 2.1 |
비교예 2 | 1 |
구분 | 인장강도(MPa) | 신장율(%) | 응력(MPa, at 300%) |
실시예 7 | 29.96 | 518 | 3.2 |
실시예 8 | 28.5 | 547 | 3.0 |
실시예 9 | 32.0 | 525 | 3.3 |
실시예 10 | 29.9 | 518 | 3.2 |
실시예 11 | 28.5 | 547 | 3.0 |
실시예 12 | 32.0 | 525 | 3.3 |
비교예 3 | 31.8 | 520 | 3.4 |
비교예 4 | 27 | 550 | 2.8 |
구분 | 50℃, 1분 | 30℃, 1분 | 50℃, 30초 | 50℃, 10초 |
실시예 7 | 9 | 7 | 8 | 8 |
실시예 8 | 9 | 8 | 9 | 8 |
실시예 9 | 7 | 7 | 6 | 6 |
실시예 10 | 9 | 7 | 8 | 8 |
실시예 11 | 9 | 8 | 9 | 8 |
실시예 12 | 7 | 7 | 6 | 6 |
비교예 3 | 3 | 1 | 1 | 1 |
비교예 4 | 6 | 5 | 5 | 5 |
Claims (19)
- 단량체 혼합물 100 중량부에 대하여 반응형 유화제 0.1 중량부 내지 10 중량부를 포함하고,상기 단량체 혼합물이a) 공액디엔계 단량체 40 중량% 내지 88 중량%;b) 에틸렌성 불포화 니트릴 단량체 10 중량% 내지 50 중량%; 및c) 에틸렌성 불포화 산 단량체 0.1 중량% 내지 10 중량%를 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 1에 있어서,상기 공액디엔계 단량체는 1,3-부타디엔, 2,3-디메틸-1,3-부타디엔, 2-에틸-1,3-부타디엔, 1,3-펜타디엔 및 이소프렌로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 1에 있어서,상기 에틸렌성 불포화 니트릴 단량체는 아크릴로니트릴, 메타크릴로니트릴, 후마로니트릴, α-클로로니트릴 및 α-시아노 에틸 아크릴로니트릴로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 1에 있어서,상기 에틸렌성 불포화 산 단량체는 카르복실기, 술폰산기 또는 산무수물기를 갖는 에틸렌성 불포화 단량체인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 4에 있어서,상기 에틸렌성 불포화 산 단량체는 아크릴산, 메타크릴산, 이타콘산, 말레인산, 푸마르산, 무수말레산, 무수 시트라콘산, 스티렌 술폰산, 푸마르산 모노부틸, 말레인산 모노부틸 및 말레인산 모노-2-히드록시 프로필로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 1에 있어서,상기 반응형 유화제는 폴리옥시에틸렌-1-(아릴옥시메틸) 알킬 에테르 설포네이트, 소듐 2-하이드록시-3-(메타아크릴로일옥시)프로페인-1-설포네이트, 소듐 11-메타아크릴로일 운데칸-1-일-설페이트, 소듐 11-크로토노일 운데칸-1-일-설페이트, 소듐 도데실 아릴 설포석시네이트 및 소듐 3-설포프로필테트라데실 말레이트로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 6에 있어서,상기 반응형 유화제는 폴리옥시에틸렌-1-(아릴옥시메틸) 알킬 에테르 설포네이트 및 소듐 도데실 아릴 설포석시네이트로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 1에 있어서,상기 라텍스 조성물은 단량체 혼합물 100 중량부에 대하여 0.1 중량부 내지 10 중량부의 음이온성 계면활성제를 추가로 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 8에 있어서,상기 음이온성 계면활성제는 소듐 도데실벤젠 설포네이트, 알킬벤젠술폰산염, 지방족술폰산염, 고급 알코올의 황산 에스테르염, α-올레핀 술폰산염 및 알킬 에테르 황산 에스테르염으로 이루어진 군으로부터 선택되는 1종 이상인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 1에 있어서,상기 단량체 혼합물은 상기 단량체 혼합물 100 중량부에 대하여 에틸렌성 불포화 단량체 1 중량부 내지 20 중량부를 추가로 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 10에 있어서,상기 에틸렌성 불포화 단량체는 스티렌, 알킬 스티렌, 비닐 나프탈렌, 플로로 에틸 비닐 에테르, (메타)아크릴아미드, N-메틸올(메타)아크릴아미드, N,N-디메틸올(메타)아크릴아미드, N-메톡시 메틸(메타)아크릴아미드, N-프로폭시 메틸(메타)아크릴아미드, 비닐 피리딘, 비닐 놀보넨, 디시클로 펜타디엔, 1,4-헥사디엔, (메타)아크릴산 메틸, (메타)아크릴산 에틸, (메타)아크릴산 부틸, (메타)아크릴산-2-에틸 헥실, (메타)아크릴산 트리 플루오르 에틸, (메타)아크릴산 테트라 플루오르 프로필, 말레인산 디부틸, 푸마르산 디부틸, 말레인산 디에틸, (메타)아크릴산 메톡시 메틸, (메타)아크릴산 에톡시 에틸,(메타)아크릴산 메톡시 에톡시 에틸, (메타)아크릴산 시아노 메틸, (메타)아크릴산 2-시아노 에틸, (메타)아크릴산 1-시아노 프로필, (메타)아크릴산 2-에틸-6-시아노 헥실, (메타)아크릴산 3-시아노 프로필, (메타)아크릴산 히드록시 에틸, (메타)아크릴산 히드록시 에틸, (메타)아크릴산 히드록시 프로필, 글리시딜 (메타)아크릴레이트 및 디메틸아미노 에틸 (메타)아크릴레이트로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 청구항 1에 있어서,상기 라텍스 조성물은 단량체 혼합물 100 중량부 대비 중합개시제 0.01 중량부 내지 2 중량부 및 분자량 조절제 0.1 중량부 내지 0.9 중량부를 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물.
- 중합 개시 전에 반응형 유화제를 단량체 혼합물과 동시에 첨가하여 반응시키는 단계; 또는단량체 혼합물의 중합 진행 후 전환율 5% 내지 80% 시점에서 반응형 유화제를 첨가하여 반응시키는 단계를 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물의 제조방법.
- 청구항 13에 있어서,상기 반응형 유화제는 폴리옥시에틸렌-1-(아릴옥시메틸) 알킬 에테르 설포네이트, 소듐 2-하이드록시-3-(메타아크릴로일옥시)프로페인-1-설포네이트, 소듐 11-메타아크릴로일 운데칸-1-일-설페이트, 소듐 11-크로토노일 운데칸-1-일-설페이트, 소듐 도데실 아릴 설포석시네이트 및 소듐 3-설포프로필테트라데실 말레이트로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물의 제조방법.
- 청구항 13에 있어서,상기 단량체 혼합물은 공액디엔계 단량체 40 중량% 내지 88 중량%, 에틸렌성 불포화 니트릴 단량체 10 중량% 내지 50 중량%; 및 에틸렌성 불포화 산 단량체 0.1 중량% 내지 10 중량%를 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물의 제조방법.
- 청구항 13에 있어서,상기 단량체 혼합물은 단량체 혼합물 100 중량부 대비 에틸렌성 불포화 단량체 1 중량부 내지 20 중량부를 추가로 포함하는 것을 특징으로 하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물의 제조방법.
- 청구항 1 내지 청구항 12 중 어느 한 항의 카르본산 변성 니트릴계 공중합체 라텍스 조성물 80 중량% 내지 99 중량%를 포함하는 딥 성형용 라텍스 조성물.
- 청구항 17의 딥 성형용 라텍스 조성물로부터 제조된 딥 성형품.
- 청구항 18에 있어서,상기 딥 성형품은 가정용 장갑, 산업용 장갑, 의료용 장갑, 콘돔 및 카테터로 이루어진 군으로부터 선택된 1종 이상인 것을 특징으로 하는 딥 성형품.
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