| 摘要 |
1,252,946. Polyurethane foams. SCOTT PAPER CO. 31 Dec., 1968 [5 Jan., 1968], No. 61950/68. Headings C3C and C3R. Polyurethane foams are prepared by reacting a polyisocyanate with a polyether polyol in the presence of a blowing agent and a surfactant and (1) a polybutene and (2) at least one unsaturated fatty acid, wherein the weight ratio of polybutene to fatty acid is from 1 : 70 to 30 : 1, and the amount of polybutene is from 0-1 to 10% of the weight of the polyether. The polybutenes suitably have a M.W. of 250 to 3000. Preferred unsaturated fatty acids are oleic acid, linoleic acid, palmitic acid, stearic acid, distilled tall oil and crude tall oil. In a typical example a polyether prepared from propylene oxide and glycerol, stannous octoate, N-ethyl morpholine, water, an organo-silicone surfactant, carbon black, a distilled tall oil, a polybutene of M.W. 1290, toluene diisocyanate and tris-chloroethyl phosphate are mixed together to form a polyurethane foam. |
