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Carbonic acid-modified nitrile-based copolymer latex composition, latex composition comprising same for dip molding, and molded product therefrom

A technology of copolymer latex and composition, applied in the directions of application, household components, household appliances, etc., can solve the problems of reduced latex stability of latex composition, poor processability, poor appearance of gloves, etc., so as to improve the wearing feeling. , The effect of improving processability and improving tensile strength

Active Publication Date: 2020-10-16
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the syneresis speed is too fast, the latex stability of the latex composition for dip molding is reduced to generate aggregates, which cause glove defects
In addition, when the workability is poor, latex flow shapes (flow marks) appear on the glove, or the glove has lumps, so that the appearance of the glove deteriorates

Method used

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  • Carbonic acid-modified nitrile-based copolymer latex composition, latex composition comprising same for dip molding, and molded product therefrom

Examples

Experimental program
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Embodiment approach

[0033]According to an exemplary embodiment of the present invention, the carboxylic acid-modified nitrile copolymer may comprise repeating units derived from conjugated diene monomers, repeating units derived from ethylenically unsaturated nitrile monomers, and repeating units derived from ethylenically unsaturated nitrile monomers. A repeat unit that is an unsaturated acid monomer, together with the repeat unit from a carboxyalkyl (meth)acrylate monomer and the repeat unit from an ethylenically unsaturated sulfonic acid monomer. That is, the carboxylic acid-modified nitrile copolymer according to an exemplary embodiment of the present invention may include a repeating unit derived from a conjugated diene-based monomer, a repeating unit derived from an ethylenically unsaturated nitrile-based monomer, a repeating unit derived from an ethylenically unsaturated nitrile-based monomer, A repeating unit from an unsaturated acid monomer, a repeating unit from a carboxyalkyl (meth)acry...

Embodiment 1

[0068]

[0069] A 10L high-pressure reactor equipped with a stirrer, a thermometer, a cooler, a nitrogen inlet, and a feed port for continuously adding monomers, emulsifiers and initiators was replaced with nitrogen, and 100 parts by weight of 30 % by weight of acrylonitrile, 62% by weight of 1,3-butadiene, 4% by weight of methacrylic acid, 2% by weight of beta-carboxyethyl acrylate and 2% by weight of 1-aryloxy-2-hydroxy A monomer mixture of sodium propyl sulfonate; 3 parts by weight of sodium alkylbenzene sulfonate; 0.6 parts by weight of tert-dodecyl mercaptan; and 140 parts by weight of ion-exchanged water, and heated to 38°C. After the heating was completed, 0.3 parts by weight of potassium persulfate as a polymerization initiator was added to perform polymerization, and when the polymerization conversion rate reached 95%, 0.1 part by weight of sodium dimethyldithiocarbamate was added to terminate the polymerization. Afterwards, remove unreacted monomer by deodorization...

Embodiment 2

[0076] Except in the preparation process of the carboxylic acid modified nitrile copolymer latex composition, 100 parts by weight of 27% by weight of acrylonitrile, 60% by weight of 1,3-butadiene, 3% by weight of methacrylic acid , 5% by weight of β-carboxyethyl acrylate and 5% by weight of 1-aryloxy-2-hydroxypropyl sulfonate monomer mixture were added as a monomer mixture outside the same reactor to The process was carried out in the same manner as in Example 1. Here, the thus obtained carboxylic acid-modified nitrile copolymer latex composition had a solid content concentration of 45% by weight and a pH of 8.5.

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Abstract

The present invention relates to a carbonic acid-modified nitrile-based copolymer latex composition. More specifically, the present invention provides a carbonic acid-modified nitrile-based copolymerlatex composition comprising a carbonic acid- modified nitrile-based copolymer, a latex composition containing same for dip molding, and a molded product therefrom, wherein the carbonic acid-modifiednitrile-based copolymer contains a carboxy alkyl (meth)acrylate monomer-derived repeat unit and a sulfonate- or sulfonic acid ester-bearing ethylenically unsaturated acid monomer-derived repeat unit.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority of Korean Patent Application No. 10-2018-0165190 filed on December 19, 2018, the entire contents of which are incorporated herein as a part of this specification. technical field [0003] The present invention relates to a kind of carboxylic acid modified nitrile copolymer latex composition, more specifically, relate to a kind of carboxylic acid modified nitrile copolymer latex composition, comprising the carboxylic acid modified nitrile copolymer latex composition Latex composition for dip molding and molded articles thereof. Background technique [0004] In general, natural rubber has been mainly used as a raw material for products requiring elasticity such as industrial, medical, and food gloves, balloons, and condoms. However, in recent years, natural rubber has been replaced by nitrile rubber due to side effects caused by natural rubber causing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L13/02C08F220/26C08F228/02C08K3/011C08K5/00C08K3/22C08J5/02
CPCC08J5/02C08K3/22C08K5/39C08K2003/2296C08K2003/2241B29L2031/4864B29C41/14C08F220/44C08J2313/02C08L13/02C08F236/06C08F236/10C08F220/26C08F228/02C08K3/011C08K5/0025C08F220/283B29C41/003B29K2019/00B29K2033/18C08F220/46C08K3/06
Inventor 金廷垠金智贤余承旭
Owner LG CHEM LTD