The resistance to yellowing caused by post formation heating of a solid organic polymer produced by polymerizing a polymerizable composition comprising: (a) from about 55 to about 89 percent by weight poly(allyl carbonate)-functional material selected from the group consisting of poly(allyl carbonate)-functional monomer, prepolymer of said monomer, and a mixture thereof; (b) from about 10 to about 30 percent by weight vicinally aliphatic polyurethane having two ethylenically unsaturated terminal groups of which at least about 40 mole percent are allyl terminal groups; and (c) from about 0.05 to about 0.5 percent by weight organic pyrocarbonate selected from the group consisting of dialkyl pyrocarbonate, dicycloalkyl pyrocarbonate, bis(cycloalkylalkyl) pyrocarbonate, and a mixture thereof; is enhanced by also including in the polymerizable composition from about 0.05 to about 0.5 percent by weight triphenyl phosphite.
通过聚合包括以下聚合物组分的聚合物可制备固态有机聚合物,并通过后期热处理提高其抗黄化性:(a)约55至89重量%的聚(烯
丙基碳酸酯)官能材料,选择自聚(烯
丙基碳酸酯)官能单体,该单体的预聚物和它们的混合物;(b)约10至30重量%的邻二元脂肪族聚
氨酯,其具有两个
乙烯基不饱和末端基团,其中至少约40摩尔%为烯丙基末端基团;(c)约0.05至0.5重量%的有机烯
碳酸酯,选择自二烷基烯
碳酸酯,二
环己烷基烯
碳酸酯,双(
环己烷基烷基)烯
碳酸酯和它们的混合物;通过在可聚合组分中还包括约0.05至0.5重量%的
三苯基膦酸酯,可以提高其抗黄化性。