Extrudable film-forming compositions of Ziegler-Natta catalyzed olefin polymers including anti-gel and anti-block components
申请人:UNION CARBIDE CORPORATION
公开号:EP0060673A1
公开(公告)日:1982-09-22
A non-volatile, anti-gel compound having a chain of at least about 5 repeat units of an alkylene oxide and which is soluble in olefin polymers, and an inorganic anti-block agent having a substantially neutral pH are added to a film grade Ziegler-Natta catalyzed olefin polymer composition to prevent: (1) gel streaking/pinstriping during film extrusion processes; (2) blocking of the extruded film; and (3) discoloration of the extruded film upon aging. The anti-gel compound has a molecular weight between about 200 and about 4,000,000 Daltons.
A masterbatch concentrate and extrusion method are also disclosed.
在薄膜级齐格勒-纳塔催化烯烃聚合物组合物中加入一种非挥发性抗凝胶化合物,该化合物具有至少约 5 个环氧烷重复单元的链,可溶于烯烃聚合物,同时还加入一种 pH 值基本为中性的无机抗阻塞剂,以防止:(1) 薄膜挤出过程中出现凝胶条纹/细条纹;(2) 挤出薄膜阻塞;以及 (3) 挤出薄膜老化变色。抗凝胶化合物的分子量在约 200 到约 4,000,000 道尔顿之间。
还公开了一种母料浓缩物和挤出方法。