公开(公告)号：US4427826A

公开(公告)日：1984-01-24

申请号：US273689

申请日：1981-06-15

申请人： Adolf Echte ,  Hermann Gausepohl ,  Hermann P. Hofmann ,  Hans Mittnacht

发明人： Adolf Echte ,  Hermann Gausepohl ,  Hermann P. Hofmann ,  Hans Mittnacht

IPC分类号： C08F2/38 ,  C08F4/00 ,  C08F279/02

CPC分类号： C08F279/02

摘要： A process, carried out without a diluent or in solution, in more than 2 reaction zones, for the continuous preparation of rubber-modified polymers of vinylaromatics, wherein a monomeric aromatic vinyl compound and an elastomeric polymer, in an amount of from 3 to 16% by weight based on the monomer, are polymerized, in the absence of a free radical initiator, but in the presence of a mercaptan as a chain transfer agent, at from 80.degree. to 180.degree. C. in a first reaction zone, with stirring, up to a maximum monomer conversion, U.sub.max, given by the equationU.sub.max =K-1where K is the amount of rubber in % by weight based on monomer, and, in a second reaction zone, polymerization is continued, with stirring, to a conversion of up to about 50% by weight, after which a chain transfer agent is introduced in an amount of from 0.01 to 0.2% by weight, based on vinyl-aromatic monomer, and polymerization is continued, if appropriate in more than one reaction zone, up to a monomer conversion of less than 85% by weight. The polymer is treated in a devolatilization zone to remove vinyl-aromatic monomer and solvent, if any, and these constituents are recycled to the process. The process produces products which exhibit good gloss coupled with good mechanical properties, and which can be employed for conventional applications.

摘要翻译： 用于连续制备乙烯基芳族化合物的橡胶改性聚合物的方法，其中没有稀释剂或在溶液中，在多于2个反应区中进行，其中单体芳族乙烯基化合物和弹性体聚合物的量为3-16 基于单体的重量％在不存在自由基引发剂的情况下，在作为链转移剂的硫醇存在下，在第一反应区中在80-180℃下进行聚合，同时搅拌 ，达到最大单体转化率，Umax，由方程式Umax = K-1给出，其中K是基于单体的以重量％计的橡胶量，并且在第二反应区中，在搅拌下继续聚合至 高达约50重量％的转化率，之后以基于乙烯基芳族单体的0.01至0.2重量％的量引入链转移剂，并且如果适当的话在多于一个反应中继续聚合 区域，单体转化率小于 85重量％。 将聚合物在脱挥发区进行处理以除去乙烯基芳族单体和溶剂（如果有的话），并将这些组分再循环到该方法中。 该方法产生具有良好光泽性和良好机械性能的产品，并且其可用于常规应用。