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Latex composition for dip molding, and shaped articles prepared therefrom

A technology of dip molding and composition, which is applied to the latex composition used for dip molding, which can solve the problems of syneresis, glove becoming sticky, large volume, etc., achieve mild syneresis, improve processing performance, and realize the effect of syneresis

Active Publication Date: 2020-11-20
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the dip molding process is performed using a low concentration of latex, there is a problem that severe syneresis, which is a phenomenon in which water drops rapidly during glove film formation, occurs, and the prepared glove also becomes sticky
This results in the formation of a coagulated latex composition which produces a large number of pinholes thereby increasing the defect rate of the glove

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Embodiment 1: The latex composition that is used for dip molding and the preparation of dip molding article

[0093] (Preparation of Carboxylic Acid Modified Nitrile Copolymer Latex)

[0094] A 10 L high pressure reactor equipped with a stirrer, thermometer, condenser and nitrogen inlet and configured for continuous addition of monomer, emulsifier and polymerization initiator was replaced with nitrogen. Thereafter, 3 parts by weight of alkane was added to the high-pressure reactor with respect to 100 parts by weight of a monomer mixture of 28% by weight of acrylonitrile, 67% by weight of 1,3-butadiene, and 5% by weight of methacrylic acid. Sodium phenyl sulfonate, 0.1 parts by weight of glyceryl monostearate, 0.5 parts by weight of tert-dodecyl mercaptan and 140 parts by weight of ion-exchanged water, and the temperature was raised to 38°C.

[0095] After raising the temperature, 0.3 parts by weight of potassium persulfate as a polymerization initiator was added. When...

Embodiment 2

[0101] Embodiment 2: The latex composition that is used for dip molding and the preparation of dip molding article

[0102] A latex composition for dip molding was prepared in the same manner as in Example 1, except that glyceryl monolaurate was used instead of glyceryl monostearate in a ratio of 0.1 parts by weight, and a glove-shaped dip molding was prepared using it. products.

Embodiment 3

[0103] Embodiment 3: The latex composition that is used for dip molding and the preparation of dip molding article

[0104] A latex composition for dip molding was prepared in the same manner as in Example 1 except that glyceryl monostearate was used in a proportion of 0.01 parts by weight, and a glove-shaped dip molding article was prepared using it.

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Abstract

The present invention relates to a latex composition for dip molding and a molded product prepared therefrom. More specifically, monoglyceride is used in the composition, and thus a dip-molded article having mild syneresis, no stickiness, and excellent chemical resistance can be produced.

Description

technical field [0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2016-0112679 filed on September 1, 2016, the entire contents of which are incorporated herein by reference. [0002] The present invention relates to a latex composition for dip molding, and a shaped article prepared therefrom, the latex composition for dip molding can be used to prepare a compound with mild syneresis, low viscosity and excellent tensile strength impregnated molded products. Background technique [0003] Disposable rubber gloves used in various daily life, such as housework, food industry, electronics industry, medical field, are made by dip molding of natural rubber or carboxylic acid modified nitrile copolymer latex. In recent years, carboxylic acid-modified nitrile gloves have attracted attention in the disposable gloves market due to the problem of natural rubber allergy and its unstable supply and demand. [0004] Meanwhile, there are vario...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/04C08K5/053C08L51/00C08J5/02
CPCC08J5/02C08K5/053C08L51/00A41D19/0055C08L9/04C08L51/003B29C41/003B29C41/14B29K2009/00B29L2031/4864C08J2309/04C08K5/10
Inventor 梁承勋金廷垠赵源泰权元相
Owner LG CHEM LTD
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