A process for the preparation of linear alternating copolymers of carbon monoxide and an ethylenically unsaturated compound by polymerizing the monomers in the presence of a suitable catalyst system, one or more components present in the reaction mixture being contaminated with alkali(ne earth) metal salt(s), which process involves a treatment by which at least part of the alkali(ne earth) metal salt is removed such that the total amount of alkali(ne earth) metals present in the copolymerization product is less than 1 part per million by weight; a copolymer composition comprising said copolymer, an alkali(ne earth) metal salt contaminant and a stabilizing quantity of a substance which is able to bind at least part of the alkali(ne earth) metal salt, the substance being other than a hydroxyapatite or a zeolite-type trivalent metal silicate; and a method for melt processing said copolymer, wherein the copolymer which contains an alkali(ne earth) metal salt contaminant is mixed with a stabilizing quantity of a substance which is able to bind at least part of the alkali(ne earth) metal salt, the substance being other than a hydroxyapatite or a zeolite-type trivalent metal silicate, and wherein the resulting mixture is melt processed.
一种制备
一氧化碳和
乙烯基不饱和化合物的线性交替共聚物的工艺,其方法是在适当的
催化剂体系存在下使单体聚合,反应混合物中存在的一种或多种成分被碱土
金属盐污染,该工艺包括一种处理方法,通过该方法除去至少部分碱土
金属盐,从而使共聚产物中存在的碱土
金属总量按重量计小于百万分之一;一种共聚物组合物,包括所述共聚物、碱(ne)土
金属盐污染物和一定量的能结合至少部分碱(ne)土
金属盐的稳定物质,该物质不是
羟基磷灰石或
沸石型三价
金属
硅酸盐;和一种熔融加工所述共聚物的方法,其中将含有碱(ne)土
金属盐污染物的共聚物与一定量的稳定物质混合,该稳定物质能够结合至少部分碱(ne)土
金属盐,该物质不是
羟基磷灰石或
沸石型三价
金属
硅酸盐,并对所得混合物进行熔融加工。