Copolymer/terpolymer/polyol dispersions for preparing polyurethanes having improved combustion resistance
申请人:UNION CARBIDE CORPORATION
公开号:EP0158885A1
公开(公告)日:1985-10-23
A stable polymer/polyol dispersion is provided, which is useful in the preparation of polyurethane foams having improved combustion resistance and which contain
(a) a polyol having a hydroxyl number from about 20 to about 150;
(b) a copolymer containing from about 0.5 weight percent to about 90 weight percent, based on the weight of the copolymer, of polymerized acrylonitrile and from about 10 weight percent to about 99.5 weight percent, based on the copolymer, of at least one other polymerized halocarbon-free monomer, wherein the copolymer is characterized by a cross- linking coefficient of less than about 55; and
(c) a terpolymer containing from about 0.5 weight percent to about 45 weight percent, based on the terpolymer, of a polymerized halocarbon monomer, from about 20 weight percent to about 50 weight percent based on the terpolymer, of polymerized acrylonitrile and from about 79.5 weight percent to about 5% weight percent, based on the terpolymer, of at least one other polymerized ethylenically unsaturated monomer;
wherein the total amount of polyol is from about 45 weight percent to about 95 weight percent, based on the total weight of the dispersion, the total amount of copolymer and terpolymer in the polyol is from about 5 weight percent to about 55 weight percent, based on the total weight of the dispersion, and the weight ratio of copolymer to terpolymer is such that the amount of aliphatic chlorine of bromine is from about 0.2 weight percent to about 18 weight percent based on the total weight of the dispersion.
本发明提供了一种稳定的聚合物/多元醇分散体,可用于制备耐燃烧性更好的聚氨酯泡沫,其中包含
(a) 羟基数约为 20 至 150 的多元醇;
(b) 一种共聚物,以共聚物重量为基准,含有约 0.5 重量%至约 90 重量%的聚合丙烯腈和约 10 重量%至约 99.5 重量%的至少一种其他聚合无卤单体,其中共聚物的特征是交联系数小于约 55;以及
(c) 三元共聚物,含有约 0.5%至约 45%的聚合卤烃单体、约 20%至约 50%的聚合丙烯腈和约 79.5%至约 5%的聚合乙烯基不饱和单体;
其中多元醇的总量占分散液总重量的约 45%至约 95%,多元醇中共聚物和三元共聚物的总量占分散液总重量的约 5%至约 55%,共聚物和三元共聚物的重量比为,脂肪族氯溴的含量占分散液总重量的约 0.2%至约 18%。