Cold-cured moulded polyurethane flexible foams having improved vibration damping properities are made by foaming in the presence of (1) a high molecular weight predominantly linear siloxane polyoxyalkylent block co- polyner and (2) a solvent which is compatible with the block copolymer and which has a viscosity of 3 to 100 cps and a surface tension between 15 and 60 dynes/cm.
冷固化模塑聚
氨酯软泡沫塑料具有更好的减震性能,其发泡方法是:(1)高分子量的线性
硅氧烷聚氧烷基嵌段共聚物;(2)与嵌段共聚物相容的溶剂,溶剂的粘度在 3 至 100 cps 之间,表面张力在 15 至 60 达因/厘米之间。