2-Propenoic acid, 2-hydroxyethyl ester, polymer with butyl 2-propenoate, ethyl 2-propenoate and 2-propenoic acid 2-Propenoic acid, butyl ester, polymer with ethyl 2-propenoate, 2-hydroxyethyl 2-propenoate and 2-propenoic acid 2-Propenoic acid, ethyl ester, polymer with butyl 2-propenoate, 2-hydroxyethyl 2-propenoate and 2-propenoic acid 2-Propenoic acid, polymer with butyl 2-propenoate, ethyl 2-propenoate and 2-hydroxyethyl 2-propenoate Acrylic acid-butyl acrylate-ethyl acrylate-2-hydroxyethyl acrylate copolymer Acrylic acid-n-butyl acrylate-ethyl acrylate-2-hydroxyethyl acrylate copolymer Butyl acrylate-ethyl acrylate-2-hydroxy acrylate-acrylic acid copolymer Butyl acrylate-ethyl acrylate-2-hydroxyethyl acrylate-acrylic acid copolymer Butyl acrylate-ethyl acrylate-acrylic acid-2-hydroxyethyl acrylate copolymer Ethyl acrylate-butyl acrylate-acrylic acid-2-hydroxyethyl acrylate copolymer