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Liq. polymer-polyol compsn. for polyurethane foams - by polymerising (meth)acrylonitrile and styrene in liq. polyol
Liq. polymer-polyol compsn. for polyurethane foams - by polymerising (meth)acrylonitrile and styrene in liq. polyol
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机译:酒聚合物多元醇组合物用于聚氨酯泡沫-通过在液体中聚合(甲基)丙烯腈和苯乙烯多元醇
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摘要
The compsn. is prepd. by polymsg., in the presence of a free radical initiator, while maintaining a low monomer: polyol ratio in the reaction mixt., (I) 10-30 wt. % of a mixt. of (a) 33-75, esp. (45), wt. % methacrylonitrile or esp. acrylonitrile, and (b) 25-67, esp. (55),wt. % a-methylstyrene or esp. styrene, in soln. or dispersion in (II) 70-90wt. % liq. polyol having an OH no. of 20-150, esp. 40-70, to give polymer particles having a dia. 1mu. Gives polyurethane foams with good physical props. as scorching is avoided.
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