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Latex for dip molding, composition for dip molding, preparation method of dip molded product, and dip molded product prepared thereby

A dip molding and latex technology, which is applied in applications, household components, household appliances, etc., can solve the problems of reduced effective effect of stability, serious air bubbles, and poor quality of dipped molded products, and achieves excellent tensile strength, The effect of resolving inhomogeneity

Active Publication Date: 2012-05-16
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the emulsifier is not fixed to the latex but adsorbed thereon, unlike the carboxyl group, there are drawbacks that the effective effect on the stability may be reduced due to the desorption that occurs during the application of mechanical shear, and Air bubbles can be serious
The handling of the product may be difficult because a lot of time and cost are spent on filtering, and the quality of the dip molded article may be affected because fine agglomerates may appear in the dip molded article during the dip molding process. become worse

Method used

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  • Latex for dip molding, composition for dip molding, preparation method of dip molded product, and dip molded product prepared thereby
  • Latex for dip molding, composition for dip molding, preparation method of dip molded product, and dip molded product prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 1-1. Preparation of latex for dip molding

[0069] A 10L high-pressure reactor connected to a stirrer, a thermometer, a cooler and a nitrogen inlet was installed so that monomers, emulsifiers and polymerization initiators were continuously added, and the reactor was filled with nitrogen, containing 30 wt% based on 100 parts by weight of A monomer mixture of acrylonitrile, 66wt% 1,3-butadiene and 4wt% methacrylic acid, adding 2 parts by weight of sodium alkylbenzene sulfonate, 0.5 parts by weight of tertiary dodecyl mercaptan, 2 parts by weight of Sodium methallyl sulfonate and 140 parts by weight of deionized water, and the temperature was raised to 40°C.

[0070] After heating, 0.3 parts by weight of a polymerization initiator potassium persulfate was added, and the polymerization reaction was terminated by adding 0.1 parts by weight of sodium dimethyldithiocarbamate when the conversion rate reached 95%. Unreacted monomers were removed through a deodorization step, an...

Embodiment 2

[0078] Except for using 5 parts by weight of sodium methallyl sulfonate instead of using 2 parts by weight of sodium methallyl sulfonate, a composition for dip molding and The physical properties of the glove-shaped dip-molded article are shown in Tables 1-3 below.

Embodiment 3

[0080] Except for using 10 parts by weight of sodium methallyl sulfonate instead of using 2 parts by weight of sodium methallyl sulfonate, a composition for dip molding and The physical properties of the glove-shaped dip-molded article are shown in Tables 1-3 below.

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Abstract

The present invention relates to a latex for dip molding, a composition for dip molding, a preparation method of a dip molded product, and a dip molded product prepared thereby. The latex for dip molding comprises a conjugated diene monomer, an ethylenically unsaturated nitrile monomer, and an ethylenically unsaturated acid monomer, and the latex for dip molding further comprises sodium methallyl sulfonate as a copolymerizable ionic monomer. A dip molded product having excellent tensile strength, elongation and touch can be obtained from the composition using the latex of the present invention, and problems such as ununiformity of physical properties, difficulties in product maintenance, and the like do not occur.

Description

technical field [0001] This patent application claims priority from Korean Patent Application No. 10-2009-0052288 filed on Jun. 12, 2009, which is hereby incorporated by reference in its entirety. [0002] The present invention disclosed herein relates to a dip molded article having excellent tensile strength, elongation and touch, a method for producing the same, a composition for dip molding for preparing the dip molded article, and the above-mentioned The latex for dip molding used in the composition for dip molding. Background technique [0003] Natural rubber latex has been commonly used as a raw material for dipping molded products such as rubber gloves, however, recently there is a defect that the protein in natural rubber latex causes skin rash, itching due to an allergic reaction when it comes into contact with human skin Or a cold. Therefore, a carboxylated acrylonitrile-butadiene-based copolymer latex, that is, a synthetic rubber latex not containing protein, is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/04C08F228/02C08F220/70C08J5/00
CPCC08J5/02C08F228/02C08F236/12C08J2313/02C08L13/02C08F220/70C08F236/04C08J5/00B29C41/003B29C41/14B29D99/0067B29K2009/00C08L9/04
Inventor 梁承勋崔浩烈韩政洙金炳伦金廷垠
Owner LG CHEM LTD
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