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1. 发明授权

US4345056A Process for suspension polymerization of vinyl chloride employing mixed protective colloids 失效
标题翻译：使用混合保护胶体的氯乙烯的悬浮聚合方法
公开(公告)号：US4345056A
公开(公告)日：1982-08-17
申请号：US959796
申请日：1978-11-13
申请人： Helmut E. Thyret , Thomas Balwe , Gerhard Beier , Johann Bauer
发明人： Helmut E. Thyret , Thomas Balwe , Gerhard Beier , Johann Bauer
IPC分类号： C08F14/00 , C08F2/00 , C08F2/18 , C08F2/20 , C08F14/06
CPC分类号： C08F14/06
摘要： An improvement in the process of producing polyvinyl chloride by the suspension process in the presence of protective colloids by utilizing a protective colloid mixture of from 20% to 80% of the protective colloid mixture of a polyvinyl acetate having a hydrolysis degree of 40 to 55 mol % and the remainder of the protective colloid mixture of (1) a water-soluble polyvinyl alcohol having a hydrolysis degree of 70 to 90 mol %, or (2) an aminoethyl-hydroxypropyl cellulose having a molar substitution of from 0.05 to 1.5 mols of aminoethyl groups and 3 to 5 mols of hydroxypropyl groups, or (3) a vinyl acetate/vinyl pyrrolidone copolymer having a ratio of vinyl pyrrolidone to vinyl acetate in the copolymer of 50% to 70% by weight to 30% to 50% by weight and a K-value of 25 to 40. By the use of this protective colloid mixture, the polyvinyl chloride produced exhibits a large absorption of plasticizer and gives finished products having a low number of specks.
摘要翻译：通过使用水解度为40〜55mol的聚乙酸乙烯酯的保护胶体混合物的20〜80％的保护胶体混合物，在保护胶体存在下，通过悬浮法制备聚氯乙烯的方法的改进％，其余的（1）水解度为70〜90摩尔％的水溶性聚乙烯醇的保护胶体混合物，或（2）摩尔取代度为0.05〜1.5摩尔的氨基乙基 - 羟丙基纤维素氨基乙基和3至5摩尔羟丙基，或（3）共聚物中乙烯基吡咯烷酮与乙酸乙烯酯的比率为50重量％至70重量％至30重量％至50重量％的乙酸乙烯酯/乙烯基吡咯烷酮共聚物并且K值为25〜40。通过使用该保护胶体混合物，所生产的聚氯乙烯显示出较大的增塑剂吸收，并产生具有少量斑点的成品。

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