Carboxylic acid modified-nitrile based copolymer latex for dip-forming, latex composition for dip-forming comprising the same, and product thereof

A carboxylic acid-modified nitrile copolymer latex for dip molding comprising:

• a carboxylic acid-modified nitrile copolymer latex having a glass transition temperature of −50° C. to −15° C. and an average particle diameter not less than 90 nm and not more than 200 nm;
• and
• a carboxylic acid-modified styrene copolymer latex having a glass transition temperature of 80° C. or higher and an average particle diameter not less than 15 nm and less than 90 nm,
• wherein the carboxylic acid-modified nitrile copolymer latex and the carboxylic acid-modified styrene copolymer latex are present at a weight ratio of 97:3 to 85:15, and
• wherein the carboxylic acid-modified styrene copolymer latex is polymerized from a monomer mixture comprising 80 to 99% by weight of an aromatic vinyl monomer, 1 to 20% by weight of an ethylenically unsaturated nitrile monomer, and 0.1 to 10% by weight of an ethylenically unsaturated acid monomer.