METHOD FOR PREPARING CARBOXYLIC ACID MODIFIED NITRILE BASED COPOLYMER LATEX, CARBOXYLIC ACID MODIFIED NITRILE BASED COPOLYMER LATEX AND ARTICLE FORMED BY THE LATEX

摘要

The present invention relates to a method for producing a carboxylic acid-modified nitrile-based copolymer latex, and more particularly, comprises the steps of polymerizing a conjugated diene-based monomer, an ethylenically unsaturated nitrile-based monomer and an ethylenically unsaturated acid monomer (S10); During the polymerization of step (S10), adding and polymerizing an acrylic monomer containing a carbonyl group at a point in time when the polymerization conversion rate is 60% or more (S20); And after completion of the polymerization of step (S20), adding dicarboxylic acid dihydrazide to the carboxylic acid-modified nitrile-based copolymer latex having a pH of 7.0 or higher (S30) and stirring (S20) The content of the carbonyl group-containing acrylic monomer input in the step is more than 0 wt% to less than 3 wt% based on the total content of the monomer mixture, and the content of the dicarboxylic acid dihydrazide input in the step (S30) is the monomer It provides a method for producing a carboxylic acid-modified nitrile-based copolymer latex in an amount of more than 0 parts by weight to less than 3 parts by weight based on 100 parts by weight of the total content of the mixture, and a molded article molded therefrom.