This invention relates to flame-retardant polymeric alkyl aryl phosphates prepared by Friedel-Crafts condensation. The polymeric alkyl aryl phosphates may be made by Friedel-Crafts condensation of chloroalkyl aryl phosphates and alkenyl aryl phosphates derived therefrom. Alernatively, the polymeric alkyl aryl phosphates may be made by Friedel-Crafts condensation of phenols followed by phosphorylation of the Friedel-Crafts condensate. The flame-retardant polymeric alkyl aryl phosphates of the present invention are particularly suitable for use as an additive, having little or no plasticizing effect in flammable organic plastics.
本发明涉及通过 Friedel-Crafts 缩合法制备的阻燃性聚合烷基芳基
磷酸盐。 聚合烷基芳基
磷酸盐可以通过
氯烷基芳基
磷酸盐和由此衍生的烯基芳基
磷酸盐的 Friedel-Crafts 缩合法制备。 另外,聚合烷基芳基
磷酸盐也可以通过
苯酚的 Friedel-Crafts 缩合法,然后对 Friedel-Crafts 缩合物进行
磷化处理来制备。 本发明的阻燃性聚合烷基芳基
磷酸盐特别适合用作添加剂,在易燃有机塑料中几乎没有增塑作用。