| 摘要 |
1,178,562. Polyurethane foam. POUDRERIES REUNIES DE BELGIQUE S.A. 20 Jan., 1967 [24 Jan., 1966], No. 3086/67. Headings C3C and C3R. [Also in Divisions C1 and F3] Polyurethane foam impregnated with talc is prepared by stirring the talc into a mixture of polyethylene glycol of low and high molecular weight, castor oil, totyl di-isocyanate and acetyl chloride, adding to the resultant mixture glycerol, polyethylene glycol, polypropylene glycol nioxdiol and dibutyl tin di-2-ethyl hexoate, and curing the mixture at 210‹ F. for at least 2 hours. MgO or 5i0 2 or a mixture of both can be used in place of the talc. |
