Process for making flexible foams,申请号US19960696411-传众专利搜索

Process for making flexible foams

申请公布号：US5849850(A)

申请号：US19960696411

申请日期：1996.08.13

申请公布日期：1998.12.15

申请人：

IMPERIAL CHEMICAL INDUSTRIES PLC

发明人：BLEYS, GERHARD JOZEF;GERBER, DIRK;NEYENS, VIVIANE GERRUDE JOHANNA

分类号：C08G18/10;C08G18/48;C08J9/00;C08L75/08;(IPC1-7):C08F18/04

主分类号：C08G18/10

摘要：Process for preparing a flexible foam by reacting a prepolymer having an NCO value of 3-15% by weight, which is the reaction product obtained by reacting an excessive amount of a polyisocyanate with a polyether polyol or a mixture of such polyols, said polyol or mixture having an average nominal hydroxyl functionality of from 2 to 6, an average hydroxyl equivalent weight of from 500 to 5000 and an oxyethylene content of at least 50% by weight, with water, the amount of water being 15-500 parts by weight per 100 parts by weight of prepolymer, at the start of the reaction the temperature of the prepolymer being 10 DEG -50 DEG C. and the temperature of the water being 10 DEG -50 DEG C. higher than the temperature of the prepolymer and a process for preparing a flexible foam by reacting the above prepolymer with water in the presence of a superabsorbent polymer.