The invention discloses an additive for polymers, including
A: phosphinic salts with two substituent groups of the formula (I)
Wherein
R1, R2 are the same or different, represents H, C1-C6-alkyl or C6-C18-aryl; M is Mg, Ca, Al, Zn, Fe; m is 2-3;
B: chloride, where the weight content of chlorine in total additives is 50-900ppm.
It can be achieved by adding chloride during the production process of the phosphinic salts with two substituent groups or in the final product, and the technological method is simple and production cost is low. The effect of whiteness of the polymer obtained is excellent when the produced phosphinic salts having two substituent groups with trace chlorine is applied to flame-retardant polymers and it also has efficient flame-retardant performance.
本发明公开了一种聚合物添加剂,包括
A:具有两个式(I)取代基团的膦盐
其中
R1、R2 相同或不同,代表 H、C1-C6-烷基或 C6-C18-芳基;M 为 Mg、Ca、Al、Zn、Fe;m 为 2-3;
B:
氯化物,其中
氯在总添加剂中的重量含量为 50-900ppm。
它可以通过在两个取代基的膦盐生产过程中或在最终产品中加入
氯化物来实现,工艺方法简单,生产成本低。将制得的含微量
氯的双取代基膦盐应用于阻燃聚合物时,聚合物的白度效果极佳,而且具有高效的阻燃性能。