Patent ID: 11066529

Abstract:
Provided are: a water-soluble matrix whose melt-kneading temperature can be adjusted according to the melting point or glass transition temperature of a resin; a pre-molded article in which resin particles are dispersed in the water-soluble matrix; and a method for producing resin particles. This production method includes melt-kneading a water-soluble matrix containing a modified polyvinyl alcohol-based resin and a water-soluble saccharide at a weight ratio of the former/the latter=from 99/1 to 50/50 and a thermoplastic resin, and bringing the pre-molded article in which the resin particles are dispersed into contact with an aqueous solvent to elute the matrix. The modified polyvinyl alcohol-based resin contains in a side chain thereof an alkyl group including at least one hydroxyl group (for example, a 1,2-dihydroxyalkyl group).