专利名称：Aqueous solution or dispersion of a styrene-maleic acid anhydride copolymer, processfor its preparation and its use
发明人：NOLKEN, ERNST, DR.申请号：EP80105591.4申请日：19800918公开号：EP0025979B1公开日：19830525
摘要：1. Aqueous solution or dispersion of a hydrolyzed copolymer of styrene andmaleic anhydride having a molar ratio of styrene to maleic anhydride superior to 1 : 1 anda molecular weight (numerical average) of more than 400, characterized in that thecopolymer has a molar ratio in the range of from 1.5 : 1 to 6 : 1 and a molecular weight offrom 500 to 80 000, 1 to 60 percent of the carboxyl groups of the copolymer areneutralized, and the pH of the solution or dispersion is below 7.
申请人：HOECHST AKTIENGESELLSCHAFT
地址：65926 Frankfurt am Main DE
国籍：DE
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