申请人:Stauffer Chemical Company
公开号:US04202842A1
公开(公告)日:1980-05-13
Copolycondensation products of .beta.-haloalkyl phosphates and dialkyl phosphonates are useful fire retardant agents. The products are prepared by heating the starting materials at a temperature of about 110.degree. to 250.degree. C., preferably in the presence of a nucleophilic catalyst, until at least one mole of alkyl halide per mole of phosphonate is driven off. Preferred are copolycondensation products obtained by substantially complete removal of halogen as alkyl halide.
.beta.-卤代烷基磷酸酯和二烷基膦酸酯的共聚缩合产物是有用的阻燃剂。该产品是通过在温度约为110℃至250℃的条件下加热起始材料制备的,最好在亲核催化剂的存在下进行,直到每摩尔膦酸酯驱除至少一个摩尔的烷基卤化物。首选的是通过基本完全去除卤素作为烷基卤化物而得到的共聚缩合产物。