104625-98-1 2-Propenoic acid, 2-methyl-, polymer with ethene and 2-methylpropyl 2-propenoate, sodium salt 2-Propenoic acid, 2-methyl-, polymer with ethene and 2-methylpropyl2-propenoate, sodium salt 61615-65-4 74256-00-1 95145-63-4