2-Propenoic acid, polymer with 2-hydroxyethyl 2-propenoate and α-(3-methyl-3-buten-1-yl)-ω-hydroxypoly(oxy-1,2-ethanediyl), graft, sodium salt 2-Propenoic acid, polymer with 2-hydroxyethyl 2-propenoate and α-(3-methyl-3-butenyl)-ω-hydroxypoly(oxy-1,2-ethanediyl), graft, sodium salt Acrylic acid-2-hydroxyethyl acrylate-polyethylene glycol isopentenyl ether graft copolymer sodium salt Acrylic acid-ethoxylated 3-methyl-3-buten-1-ol-2-hydroxyethyl acrylate graft copolymer sodium salt Acrylic acid-ethoxylated 3-methyl-3-buten-1-ol-2-hydroxylethyl acrylate graft copolymer sodium salt Acrylic acid-ethoxylated 3-methyl-3-butene-1-ol-2-hydroxyethyl acrylate copolymer sodium salt Acrylic acid-ethoxylated 3-methyl-3-butenol-2-hydroxyethyl acrylate graft copolymer sodium salt