AQUEOUS HETEROPOLYMER DISPERSION FOR MANUFACTURING COATINGS AND PROCESS OF ITS PRODUCTION

摘要

An aqueous heteropolymer dispersion for manufacturing coatings, particles of the dispersion comprising copolymers that include acrylic monomer units and comprising a core and at least one outer shell, wherein: the particles comprise the core, an intermediate shell and an outer shell; a core copolymer is a copolymer of (meth)acrylate ester, or a mixture of said esters, and ethylenically unsaturated monomer containing two or three C=Cbonds, and, optionally, an ethylenically unsaturated monomer containing carboxylic groups, the core copolymer is a copolymer of methacrylate ester, or a mixture of said esters, an ethylenically unsaturated monomer containing two or three C=C bonds, and, optionally, an ethylenically unsaturated monomer containing carboxylic groups, the intermediate shell copolymer having a glass transition temperature of 50 to 85 DEG C; an outer shell copolymer is a copolymer of methacrylate ester, or a mixture of said esters, and an ethylenically unsaturated monomer containing carboxylic groups, the outer shell copolymer having a glass transition temperature of 25 to 70 DEG C; and wherein the weight parts of the core, intermediate shell and outer shell are, respectively, 60-75, 7.5-20, and 10-22.5; ad the average size of the particles is of 50 to 220 nanometers.