| 摘要 |
<p>A levelling agent for use in aqueous paints is composed of a copolymer of monoethylenically, alpha, betaunsaturated carboxylic acid and an alkyl acrylate or an alkyl methacrylate having in each case from 1 to 18 carbon atoms in the alkyl moiety, the copolymer having an average molecular weight of from about 2,000 to 80,000 and an acid value of from about 30 to 200, the carboxyl groups of the said copolymer being neutralized with a bas . The levelling agent, when used in an aqueous paint, provides improved surface gloss as well as improved surface properties for re-coating.</p> |
