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1. 发明授权

US4182809A Inversion polymerization process for producing vinyl resins using a dual layer coating 失效
标题翻译：使用双层涂层生产乙烯基树脂的反转聚合方法
公开(公告)号：US4182809A
公开(公告)日：1980-01-08
申请号：US939623
申请日：1978-09-05
申请人： Paul O. Hong , James R. Petrillo , Teresa L. Friel , Donald E. Witenhafer
发明人： Paul O. Hong , James R. Petrillo , Teresa L. Friel , Donald E. Witenhafer
IPC分类号： C08F2/02 , C08F2/18 , C08F2/32 , C08F14/06
CPC分类号： C08F2/02 , C08F2/32
摘要： This invention relates to a process of producing vinyl polymers or resins by an inversion polymerization technique in the presence of a dual layer coating on the internal surfaces of the polymerization reactor. By inversion polymerization is meant conducting the polymerization reaction in two stages, in the first or initial stage of which the monomer or monomers being polymerized constitute the continuous phase, and in the second or latter stage of polymerization, water constitutes the continuous phase due to the addition of sufficient water to the reactor to form said phase. The dual layer coating comprises an undercoating or primary coating of a tannin or tannate such as tannic acid or ammonium tannate, said coating being applied from an aqueous solution thereof, and a top coating comprised of a water-soluble suspending agent, such as an alkyl or an alkyl hydroxyalkyl cellulose ether, said top coating being applied from an aqueous solution thereof. By means of the present invention, polymer buildup on the internal surfaces of the reactor is substantially reduced.
摘要翻译：本发明涉及在聚合反应器内表面存在双层涂层的情况下通过反转聚合技术生产乙烯基聚合物或树脂的方法。通过反转聚合是指在两个阶段中进行聚合反应，其中聚合的单体或单体的第一个或初始阶段构成连续相，而在第二个或后一个聚合阶段，由于向反应器中加入足够的水以形成所述相。双层涂层包括单宁或单宁酸盐如单宁酸或鞣酸单酸盐的底涂或初级涂层，所述涂层由其水溶液施加，并且由水溶性悬浮剂如烷基或烷基羟烷基纤维素醚，所述顶涂层由其水溶液施加。通过本发明，反应器内表面上的聚合物积聚显着减少。

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