KR101570568B1 - Carboxylic acid modified nitrile based copolymer latex composition for dip molding and composition for dip molding - Google Patents

Abstract

According to the present invention, by including 2-isopropenyl-2-oxazoline having a crosslinkable functional group or a polymer thereof, it is possible to provide a polyurethane resin excellent in strength and feel under the unused condition of sulfur and a vulcanization accelerator and having durability against sweat and tensile force The present invention can provide a carboxylic acid-modified nitrile-based copolymer latex composition for deep-forming which does not cause an allergic reaction, and a composition for dip molding comprising the same.

Description

TECHNICAL FIELD [0001] The present invention relates to a carboxylate-modified nitrile-based copolymer latex composition for dip-molding, and a composition for dip-molding comprising the same. BACKGROUND ART [0002]

TECHNICAL FIELD The present invention relates to a carboxylic acid-modified nitrile-based copolymer latex composition for dip molding and a composition for dip molding comprising the same. More particularly, the present invention relates to 2- , A carbonic acid modified nitrile-based copolymer latex composition having excellent strength and feel under the unused conditions of sulfur and vulcanization accelerator, maintaining the durability against sweat and tensile force of a person and causing no allergic reaction, and a dip And a molding composition.

Rubber gloves are used in a wide range of fields such as housework, food industry, electronics industry, and medical field. Rubber gloves made by deep molding of natural rubber latex have been used many times, but the protein contained in natural rubber has caused some users allergic reaction such as pain and rash.

A latex composition in which sulfur and a vulcanization accelerator are mixed with a carboxylic acid-modified nitrile-based copolymer latex such as an acrylic acid-acrylonitrile-butadiene copolymer latex, which does not cause an allergic reaction, Many molded gloves were used.

However, in the process for producing such gloves, since the sulfur and the vulcanization accelerator are mixed in the latex and then subjected to a long stirring aging process for 24 hours or more, the productivity is lowered. In addition, rubber gloves containing sulfur and vulcanization accelerators as essential components are not suitable for a long period of time, and if the work is continued for a long time, odor due to sulfur is generated to give an uncomfortable feeling, the color of the glove is discolored, There was also a problem that it caused a tingling.

In general, a zinc-containing vulcanization accelerator is added for ion-bridging between carboxyl groups. However, there is a problem that the water resistance of the glove is deteriorated. If sulfur and vulcanization accelerators are not used to solve these problems, the durability of the gloves may be poor. When the gloves are worn for a long time, the gloves may be torn, and the chemical resistance to solvents and organic matters may be deteriorated. There may be problems.

Japanese Unexamined Patent Publication (Kokai) No. 2006-321955 discloses a method of obtaining a deep-formed product without using sulfur and a vulcanization accelerator by using a latex composition for dip molding comprising a conjugated diene rubber latex and an organic peroxide, It is possible to make a glove that does not discolor even when used for a long time, but it is disadvantageous that the organic peroxide solution is very harmful to the human body and is not safe because of fire and explosion when heat or shock is applied.

On the other hand, U.S. Patent No. 7,345,111 B2 discloses a glove made of acrylic emulsion latex which is free of aging for a long time and does not cause an allergic reaction caused by sulfur and vulcanization accelerator, but acrylic gloves are too sensitive to temperature .

Accordingly, an object of the present invention is to provide a rubber composition which is excellent in strength and feel under the unused condition of sulfur or vulcanization accelerator for crosslinking of nitrile rubber, maintains durability against human sweat, And a carboxylic acid-modified nitrile-based copolymer latex which does not cause a problem.

Another object of the present invention is to provide a latex composition for deep molding comprising the carboxylic acid-modified nitrile-based copolymer latex and a molded article produced therefrom.

In order to achieve the above object, the present invention provides a rubber composition comprising a carboxylic acid-modified nitrile-based copolymer latex; And 2-isopropenyl-2-oxazoline or a polymer thereof. The present invention provides a carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.

The present invention also provides a composition for dip molding comprising the carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.

The present invention also provides a dip-molded article obtained by dip-molding the composition.

The carboxylic acid-modified nitrile-based copolymer latex composition for dip molding according to the present invention does not require an aging step for agitation for a long time, which is conventionally required for sulfur or vulcanization accelerators for crosslinking of nitrile rubber, and does not cause an allergic reaction, The resulting molded article has an effect of having oil resistance and mechanical strength equivalent to or similar to those of the prior art, durability against sweat of a person, and soft touch. Also, it is possible to manufacture molded products with higher tensile strength and better fit than existing gloves.

The inventors of the present invention have found that, in the production of a carboxylic acid-modified nitrile-based copolymer latex composition, in order to perform the role of a crosslinking agent, the use of 2-isopropenyl-2-oxazoline or a polymer thereof having a crosslinkable functional group, It is possible to solve the problems of the prior art, such as being excellent in strength and touch, maintaining durability against perspiration and tensile force of a person, and not causing an allergic reaction, and completed the present invention.

Hereinafter, the configuration of the present invention will be described in more detail as follows.

The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding of the present invention, the composition for dip molding comprising the same, and the dip-molded article manufactured using the composition are described in detail.

Carboxylic acid-modified nitrile-based copolymer latex for dip molding

The carboxylic acid-modified nitrile-based copolymer latex according to the present invention is prepared by adding an emulsifier, a polymerization initiator, a molecular weight modifier and other additives to each monomer constituting the carboxylic acid-modified nitrile-based copolymer, followed by emulsion polymerization.

The carboxylic acid-modified nitrile-based copolymer latex for dip molding according to the present invention is prepared by adding an emulsifier, a polymerization initiator and a molecular weight regulator to each monomer constituting the carboxylic acid-modified nitrile-based copolymer latex to prepare a carboxylic acid- Followed by the addition of 2-isopropenyl-2-oxazoline or a polymer thereof.

Wherein each monomer constituting the carboxylic acid-modified nitrile-based copolymer comprises 40 to 89% by weight of a conjugated diene monomer, 10 to 50% by weight of an ethylenically unsaturated nitrile monomer, 0.1 to 10% by weight of an ethylenically unsaturated acid monomer, And 0 to 20% by weight of other ethylenically unsaturated monomers copolymerizable with the monomers.

Examples of the conjugated diene-based monomer include 1-methyl-1,3-butadiene, 1,3-butadiene, 1,3-pentadiene and isoprene. Or more, and specific examples thereof include 1,3-butadiene and isoprene.

The conjugated diene monomer is contained in an amount of, for example, 40 to 89% by weight or 45 to 80% by weight of all the monomers constituting the carboxylic acid-modified nitrile-based copolymer. If the content of the conjugated diene monomer is less than 40% by weight, the resulting dip-molded article may become hard and the feeling of fit may be poor. If the content exceeds 89% by weight, the oil resistance of the dip-molded article may be poor and the tensile strength may be lowered.

Examples of the ethylenically unsaturated nitrile monomer include acrylonitrile, methacrylonitrile, fumaronitrile,? -Chloronitrile, and? -Cyanoethyl acrylonitrile among the total monomers constituting the carboxylic acid-modified nitrile- , And specific examples thereof include acrylonitrile, methacrylonitrile, and the like.

The ethylenically unsaturated nitrile monomer includes 10 to 50% by weight or 15 to 45% by weight of all the monomers constituting the carboxylic acid-modified nitrile-based copolymer. If the content of the ethylenically unsaturated nitrile monomer is less than 10% by weight, the oil resistance of the dip molded article may be poor and the tensile strength may be deteriorated. If the ethylenically unsaturated nitrile monomer content exceeds 50% by weight, the dip molded article may become hard and the wearing feeling may be poor.

The ethylenically unsaturated acid monomer is an ethylenically unsaturated monomer containing at least one acidic group selected from the group consisting of a carboxyl group, a sulfonic acid group and an acid anhydride group, and includes, for example, acrylic acid, methacrylic acid, itaconic acid, maleic acid, Unsaturated carboxylic acid monomers; Polycarboxylic anhydrides such as maleic anhydride and citraconic anhydride; Ethylenically unsaturated sulfonic acid monomers such as styrenesulfonic acid; Ethylenic unsaturated polycarboxylic acid partial ester monomers such as monobutyl fumarate, monobutyl maleate, mono-2-hydroxypropyl maleate, and the like. As a specific example, an ethylenically unsaturated carboxylic acid monomer, preferably methacrylic acid, can be used. The ethylenically unsaturated acid monomer may also be used in the form of an alkali metal salt or ammonium salt.

The ethylenically unsaturated acid monomer includes, for example, 0.1 to 10% by weight, 0.5 to 9% by weight, or 1 to 8% by weight of the total monomers constituting the carboxylic acid-modified nitrile-based copolymer. When the content of the ethylenically unsaturated acid monomer is less than 0.1% by weight, the tensile strength of the dip-molded article may be lowered. If the content of the ethylenic unsaturated acid monomer is more than 10% by weight, the resulting dip-molded article may become hard and the wearing feeling may be poor.

Examples of other ethylenically unsaturated monomers copolymerizable with the ethylenically unsaturated nitrile monomer and the ethylenic unsaturated acid monomer include vinyl aromatic monomers such as styrene, alkylstyrene and vinylnaphthalene; Fluoroalkyl vinyl ethers such as fluoro ethyl vinyl ether; (Meth) acrylamide, N, N-dimethylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N-propoxymethyl Ethylenically unsaturated amide monomers; Vinyl pyridine; Vinyl norbornene; Non-conjugated diene monomers such as dicyclopentadiene and 1,4-hexadiene; (Meth) acrylic acid esters such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, trifluoroethyl Butyl methacrylate, diethyl maleate, methoxymethyl (meth) acrylate, ethoxyethyl (meth) acrylate, methoxyethoxyethyl (meth) acrylate, cyanomethyl (meth) acrylate, 2-cyanoethyl (Meth) acrylate, 2-ethyl-6-cyanohexyl (meth) acrylate, 3-cyanopropyl (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxyethyl Ethylenically unsaturated carboxylic acid ester monomers such as (meth) acrylic acid hydroxypropyl, glycidyl (meth) acrylate, and dimethylaminoethyl (meth) acrylate.

These ethylenically unsaturated monomers may be used alone or in combination of two or more. The amount of the ethylenically unsaturated monomer to be used may be 20 wt% or less, or 0.001 to 20 wt% of the monomer mixture. If the amount of the ethylenically unsaturated monomer used is too large, the balance between the soft feeling and the tensile strength does not match well.

The carboxylic acid-modified nitrile-based copolymer latex of the present invention can be produced by adding an emulsifier, a polymerization initiator, a molecular weight regulator, and the like to the monomer constituting the carboxylic acid-modified nitrile-based copolymer, followed by emulsion polymerization.

Examples of the emulsifying agent include anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants. Specific examples thereof include an anionic surfactant selected from the group consisting of alkylbenzenesulfonic acid salts, aliphatic sulfonic acid salts, sulfuric acid ester salts of higher alcohols, alpha -olefin sulfonic acid salts, and alkyl ether sulfuric acid ester salts.

The amount of the emulsifier to be used may be, for example, 0.3 to 10 parts by weight or 0.8 to 8 parts by weight based on 100 parts by weight of the monomer constituting the carboxylic acid-modified nitrile-based copolymer.

The polymerization initiator is not particularly limited, but a radical initiator can be preferably used. Inorganic peroxides such as sodium persulfate, potassium persulfate, ammonium persulfate, potassium perphosphate, and hydrogen peroxide; t-butyl peroxide, cumene hydroperoxide, p-menthol hydroperoxide, di-t-butyl peroxide, t-butyl cumyl peroxide, acetyl peroxide, isobutyl peroxide, octanoyl peroxide, dibenzoyl peroxide Organic peroxides such as oxides, 3,5,5-trimethylhexanol peroxide, t-butyl peroxyisobutyrate; Azobisisobutyronitrile, azobisisobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexanecarbonitrile, and azobisbutyric acid (butyl acid) methyl, and specific examples thereof include inorganic peroxides As another example, persulfate can be used.

The amount of the polymerization initiator used is, for example, 0.01 to 2 parts by weight, or 0.02 to 1.5 parts by weight, based on 100 parts by weight of the monomer constituting the carboxylic acid-modified nitrile-based copolymer.

Examples of the molecular weight modifier include mercaptans such as? -Methylstyrene dimer, t-dodecyl mercaptan, n-dodecyl mercaptan, and octyl mercaptan; Halogenated hydrocarbons such as carbon tetrachloride, methylene chloride, and methylene bromide; Sulfur-containing compounds such as tetraethylthiuram disulfide, dipentamethylenethiuramdisulfide, and diisopropylkantogen disulfide, and the like. These molecular weight modifiers may be used alone or in combination of two or more. Specific examples thereof include mercaptans, and another example is t-dodecyl mercaptan.

The amount of the molecular weight modifier to be used varies depending on the kind, but is 0.1 to 0.9 parts by weight or 0.2 to 0.7 parts by weight relative to 100 parts by weight of the monomer constituting the carboxylic acid-modified nitrile-based copolymer.

In the latex polymerization of the present invention, auxiliary materials such as a chelating agent, a dispersing agent, a pH adjusting agent, an oxygen scavenger, a particle size adjusting agent, an anti-aging agent and an oxygen scavenger may be added as necessary.

The method for introducing the monomer mixture constituting the carboxylic acid-modified nitrile-based copolymer is not particularly limited. For example, a method of charging the monomer mixture into the polymerization reactor at a time, a method of continuously feeding the monomer mixture into the polymerization reactor, And a method in which a part of the monomer is fed into a polymerization reactor and the remaining monomers are continuously fed into a polymerization reactor can be used.

The polymerization temperature at the emulsion polymerization is not particularly limited, but is, for example, from 10 to 90 ° C, or from 25 to 75 ° C.

After the polymerization reaction is stopped, unreacted monomers are removed and the solid content concentration and pH are adjusted to obtain a carboxylic acid-modified nitrile-based copolymer latex.

Carboxylic acid-modified nitrile-based copolymer latex composition for dip molding

The carboxylic acid modified nitrile-based copolymer latex composition for dip-molding according to the present invention comprises the carboxylic acid-modified nitrile-based copolymer latex and 2-isopropenyl-2-oxazoline or a polymer thereof .

The polymer of the 2-isopropenyl 2-oxazoline may be, for example, poly 2-methyl-2-oxazoline, poly 2-ethyl-2-oxazoline, Poly-2-ethyl-2-oxazoline can be used.

In the present invention, the 2-isopropenyl 2-oxazoline can form a double bond of a partial chain of a carboxylic acid-modified nitrile-based copolymer latex and a carboxylic acid of another chain, and the 2-isopropenyl 2- The polymer of oxazoline has a longer length between crosslinking points than 2-isopropenyl 2-oxazoline, which is a monomer, and can provide a stronger effect on the strength and texture of the dip molded article.

The weight average molecular weight (Mw) of the 2-isopropenyl-2-oxazoline polymer is not limited thereto, but it is preferably 1,000 to 200,000 g / mol, g / mol or a molecular weight of 4,500 to 120,000 g / mol.

The 2-isopropenyl-2-oxazoline or its polymer may be used in an amount of, for example, 0.01 to 10 parts by weight, preferably 0.05 to 10 parts by weight, based on 100 parts by weight of the monomer constituting the carboxylic acid-modified nitrile- To 7 parts by weight or 0.1 to 4 parts by weight. It is possible to maintain sufficient durability by forming sufficient external crosslinking in the above range.

Composition for dip molding

The above-mentioned carbonic acid modified nitrile-based copolymer latex composition for dip molding may further contain an ionic crosslinking agent for dip molding, a metal oxide such as zinc oxide, a pigment such as titanium dioxide, a filler such as silica, a pH adjuster such as ammonia or alkali hydroxide A composition for dip molding can be prepared by adding an additive generally used in dip molding.

The solid content concentration of the dip molding composition of the present invention is, for example, 10 to 40% by weight, 15 to 35% by weight, or 18 to 33% by weight. The pH of the composition for dip molding of the present invention is, for example, 8 to 12, 9 to 11, or 9.3 to 10.5.

Deep-formed product

The dip-molded article according to the present invention is characterized in that it is produced by dip-molding the composition for dip-molding.

Examples of the dip molding method for obtaining the dip molded article of the present invention include a direct dipping method, an anode adhesion dipping method, and a teague adhesion dipping method. Of these, the positive electrode deposition dipping method is preferable because of the advantage of easily obtaining a dip-shaped article having a uniform thickness.

Hereinafter, a method for producing a dip-molded article using the composition for dip molding of the present invention will be described in detail.

A method of producing a dip molded article using the composition for dip molding according to the present invention comprises the steps of: (a) immersing a hand shaped dip forming mold in a coagulant solution and attaching a coagulant to the surface of a dip forming mold;

(b) immersing a dip molding die with a coagulant attached thereto in the dip molding composition of the present invention to form a dip molding layer;

(c) crosslinking the latex resin by heat-treating the dip molding layer formed in the dip molding die; And

(d) measuring the physical properties of the resulting dip-molded article.

(a) a hand-shaped dip Molding frame  Dip into coagulant solution Mold  Attaching a coagulant to the surface

Examples of coagulants include metal halides such as barium chloride, calcium chloride, magnesium chloride, zinc chloride, aluminum chloride, and the like; Nitrates such as barium nitrate, calcium nitrate and zinc nitrate; Acetic acid salts such as barium acetate, calcium acetate and zinc acetate; Calcium sulfate, magnesium sulfate, and sulfate such as aluminum sulfate. Of these, calcium chloride and calcium nitrate are preferred. The coagulant solution is a solution in which the above coagulant is dissolved in water, alcohol or a mixture thereof. The concentration of the coagulant in the coagulant solution is, for example, 5 to 75% by weight, or 15 to 55% by weight.

(b) Deep with coagulant Molding frame  In the above dip molding composition Immersed  Dip The shaping layer  Forming step

A dip forming mold having a coagulant attached thereto is immersed in the composition for dip molding of the present invention, and then a dip forming mold is taken out to form a dip forming layer in a dip forming mold.

(c) Dip In a mold  Formed dip The shaping layer  The latex resin Bridging  step

At the time of the heat treatment, the water component first evaporates and crosslinking is performed. Subsequently, the dip-formed layer crosslinked by the heat treatment is peeled off from the dip forming mold to obtain a dipped molded article.

(d) measuring the physical properties of the obtained dip-molded article

A dumbbell-shaped test piece is prepared from the obtained dip-molded article in accordance with ASTM D-412. Subsequently, the test piece was pulled at a stretching speed of 500 mm / min using a universal testing machine (UTM), and the tensile strength and elongation at break were measured, and the tactile sensation was measured by the stress when the elongation was 300%. The higher the tensile strength and elongation, the better the quality of the dip product, and the lower the stress value when the elongation is 300%, the better the quality of the deep-molded product is. Durability is measured by measuring the number of times the specimen is cut off by immersing the specimen in the artificial sweat solution to 200%. The higher the frequency, the stronger the person's sweat and tensile strength.

The process according to the invention is also applicable to any latex article which can be produced by known dip-molding processes. Specifically, it can be applied to deep-formed latex articles selected from surgical gloves, examination gloves, condoms, catheters or various kinds of health care products such as industrial and household gloves.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Changes and modifications may fall within the scope of the appended claims.

[Example]

Example  One

26 parts by weight of acrylonitrile, 68 parts by weight of 1,3-butadiene, 6 parts by weight of methacrylic acid, 0.5 parts by weight of tert-dodecylmercaptan, 2.3 parts by weight of sodium dodecylbenzenesulfonate and 140 parts by weight of water, After the addition, the temperature was raised to 40 ° C to initiate polymerization. When the conversion rate reached 65%, the temperature was elevated to 70 ° C to proceed the polymerization. When the conversion was 94%, 0.3 part by weight of ammonium hydroxide was added to terminate the polymerization. Unreacted monomers were removed through a deodorization process and ammonia water, an antioxidant, a defoaming agent and the like were added to obtain a carboxylic acid modified nitrile copolymer latex having a solid concentration of 44.5% and a pH of 8.5.

To the latex was added 2 parts by weight of 2-isopropenyl 2-oxazoline to obtain a latex composition. Then, a potassium hydroxide solution, 1.5 parts by weight of zinc oxide, 0.5 part by weight of titanium oxide, and an appropriate amount of a dispersant and secondary distilled water were added, To obtain a composition for dip molding having a concentration of 30% and a pH of 9.5.

22 parts by weight of calcium nitrate, 69.5 parts by weight of water, 8 parts by weight of calcium carbonate and 0.5 part by weight of a wetting agent (Teric 320 produced by Huntsman Corporation, Australia) were mixed to prepare a coagulant solution. A hand-shaped ceramic mold was immersed in this solution for 1 minute, taken out, dried at 70 ° C for 3 minutes, and the coagulant was applied to the hand mold.

Next, the mold to which the coagulant was applied was immersed in the above-described composition for deep molding for 1 minute, pulled up, dried at 70 ° C for 2 minutes, and then immersed in water or hot water for 3 minutes to leach. The mold was again dried at 70 DEG C for 3 minutes and then crosslinked at 130 DEG C for 20 minutes. The crosslinked dip molding layer was peeled off from the hand mold to obtain a glove-shaped dip molding.

The physical properties of the dip-shaped article are shown in Table 1 below.

Example  2

Except that 2 parts by weight of poly 2-ethyl-2-oxazoline having a molecular weight (Mw) of 5000 g / mol was used instead of 2-isopropenyl 2-oxazoline in Example 1 to prepare a glove- .

Example  3

Except that 2 parts by weight of poly 2-ethyl-2-oxazoline having a molecular weight (Mw) of 100,000 g / mol was used instead of 2-isopropenyl 2-oxazoline in Example 1, .

Example  4

In the same manner as in Example 1 except that 6 parts by weight of 2-isopropenyl-2-oxazoline was used instead of 2 parts by weight, a glove-shaped dip molding was prepared.

Comparative Example  One

Except that 2 parts by weight of 2-isopropenyl 2-oxazoline was replaced with 1.0 part by weight of dispersed sulfur and 0.5 part by weight of a vulcanization accelerator in the carboxylic acid-modified nitrile copolymer latex of Example 1 Glove type dip moldings were prepared.

[Test Example]

The evaluation of the dip molded articles produced in Examples 1 to 4 and Comparative Example 1 was carried out by the following method.

* Tensile strength, elongation, stress at 300% elongation (modulus at 300%): A dumbbell-shaped specimen was prepared from the obtained dip-molded article according to ASTM D-412. Subsequently, the test piece was pulled at a stretching speed of 500 mm / min, and the stress at the elongation percentage of 300%, the tensile strength at the elongation, and the elongation at breakage were measured.

* Tensile strength retention: Stretching was stopped at both ends of the dumbbell-shaped specimen at a speed of 500 mm / min to extend the standard section of 20 mm to 40 mm, and the stress M100 (0) at that time was measured. The stress M100 (6) is measured after the elapse of 6 minutes as it is. The value of M100 (6) for M100 (0) is calculated as a percentage, and this value is defined as the stress retention rate. If the stress retention rate is 50% or more, the fit property is excellent.

The physical properties of the dip-shaped articles measured above are shown in Table 1 below.

Tensile Strength (MPa) Elongation (%) Stress at 300% (MPa) Stress Retention Rate (%) Example 1 32 580 3.8 45 Example 2 33.5 613 3.5 51 Example 3 31.6 621 3.4 55 Example 4 27 557 4.1 47 Comparative Example 1 25.8 702 2.3 52

As shown in Table 1, in the case of Examples 1 to 4 in which 2-isopropenyl 2-oxazoline or a polymer thereof was added to a carboxylic acid-modified nitrile-based copolymer latex, under the unused conditions of sulfur and a vulcanization accelerator It has been found that gloves having a physical property corresponding to that of Comparative Example 1 using sulfur and a vulcanization accelerator can be effectively produced without aging for a long period of time.

Claims (14)

Carboxylic acid-modified nitrile-based copolymer latex; And
2-isopropenyl-2-oxazoline or a polymer thereof.
The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.
The method according to claim 1,
Wherein the polymer of 2-isopropenyl-2-oxazoline has a weight average molecular weight (Mw) of 1,000 to 200,000 g / mol
The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.
The method according to claim 1,
Wherein the carboxylic acid-modified nitrile-based copolymer latex comprises 40 to 89% by weight of a conjugated diene monomer, 10 to 50% by weight of an ethylenically unsaturated nitrile monomer, 0.1 to 10% by weight of an ethylenically unsaturated acid monomer, And 0 to 20% by weight of an unsaturated monomer is polymerized.
The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.
The method of claim 3,
The conjugated diene monomer may be at least one selected from the group consisting of 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-butadiene, 1,3-pentadiene and isoprene ≪ / RTI >
The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.
The method of claim 3,
Wherein the ethylenically unsaturated nitrile monomer is at least one selected from the group consisting of acrylonitrile, methacrylonitrile, fumaronitrile,? -Chloronitrile and? -Cyanoethyl acrylonitrile
The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.
The method of claim 3,
Wherein said ethylenically unsaturated acid monomer is selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, maleic anhydride, citraconic anhydride, styrenesulfonic acid, monobutyl fumarate, monobutyl maleate and mono-2-hydroxypropyl maleate And at least one group selected from the group consisting of
The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.
The method according to claim 1,
The 2-isopropenyl-2-oxazoline or the polymer thereof is 0.01 to 10 parts by weight based on 100 parts by weight of the monomer constituting the carboxylic acid-modified nitrile-based copolymer latex
The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.
The method according to claim 1,
The carboxylic acid-modified nitrile-based copolymer latex is added in an amount of 0.3 to 10 parts by weight of an emulsifier, 0.01 to 2 parts by weight of a polymerization initiator and 0.1 to 0.9 parts by weight of a molecular weight modifier, based on 100 parts by weight of monomers constituting the carboxylic acid-modified nitrile- Characterized in that it is polymerized
The carboxylic acid-modified nitrile-based copolymer latex composition for dip-molding.
A monomer mixture of 40 to 89% by weight of a conjugated diene monomer, 10 to 50% by weight of an ethylenically unsaturated nitrile monomer and 0.1 to 10% by weight of an ethylenically unsaturated acid monomer to obtain a carboxylic acid-modified nitrile-based copolymer latex Step (a); And
(B) adding 2-isopropenyl-2-oxazoline or a polymer thereof to the carboxylic acid-modified nitrile-based copolymer latex of step (a). ≪ / RTI >
Characterized in that it comprises the carboxylic acid-modified nitrile-based copolymer latex composition for dip molding obtained by the method of claim 9
Composition for dip molding.
11. The method of claim 10,
Characterized in that the composition comprises at least one additive selected from the group consisting of an ionic cross-linking agent, a pigment, a filler, a thickener and a pH regulator
Composition for dip molding.
11. The method of claim 10,
Wherein the solid concentration of the composition is 10 to 40 wt%
Composition for dip molding.
Characterized in that it is produced by dip-molding the composition for deep-forming according to claim 10
Deep molded products.
14. The method of claim 13,
Wherein the dip-molded article is a condom, a catheter, an examination glove, an industrial glove, a household glove, or a health care molded article.