公开(公告)号：US5739183A

公开(公告)日：1998-04-14

申请号：US528380

申请日：1995-09-13

申请人： Chi-San Wu ,  James Curry ,  James P. Cullen ,  John S. Mc Ewan

发明人： Chi-San Wu ,  James Curry ,  James P. Cullen ,  John S. Mc Ewan

IPC分类号： C08F8/12 ,  C08F8/30 ,  C08K5/17 ,  C08K5/16

CPC分类号： C08K5/175 ,  C08F8/12 ,  C08F2810/50

摘要： A method of stabilizing an aqueous solution of an acid copolymer of maleic acid and a C.sub.1 -C.sub.5 alkyl vinyl ether against degradation in viscosity or molecular weight upon storage for an extended period of time in aqueous solution at ambient conditions, with a single stabilizing agent, which comprises forming the acid copolymer directly from a slurry of corresponding anhydride in an organic solvent by hydrolysis in water, and adding including ethylenediamine tetraacetic acid (EDTA), or salt thereof, as the single stabilizing agent to the solution either before or after hydrolysis.

摘要翻译： 一种稳定马来酸和C1-C5烷基乙烯基醚的酸共聚物的水溶液的方法，其在环境条件下用单一稳定剂在水溶液中长时间储存​​时不会降低粘度或分子量， 其包括在有机溶剂中通过在水中水解直接从相应的酸酐的浆料形成酸共聚物，并且在水解之前或之后将包括乙二胺四乙酸（EDTA）或其盐作为单一稳定剂加入溶液中。