| 摘要 |
<p>1,150,139. Polyol composition; polyurethanes. UPJOHN CO. 29 Aug., 1967 [20 Sept., 1966], No. 39461/67. Headings C3C and C3R. A polyol composition which may be reacted with a polyisocyanate to produce flame retardant polyurethanes comprises (a) a phosphoric acid-alkylene oxide adduct, (b) optionally a non-phosphorus containing polyol, (c) a tertiary amine catalyst and (d) as stabilizer for the blend, from 1 to 6% by weight, based on the total weight of polyol in the composition, of a second tertiary amine having less than one-half of the catalytic activity of, and a pKa value within Œ 2À5 units of that of the tertiary amine catalyst (c). Conventional phosphoric acidalkylene oxide adducts especially adducts of phosphoric acid and propylene oxide, may be used. The optional polyol (b) is suitably a polyether or polyester of hydroxyl number 300 to 800 and functionality 2 to 8. Conventional tertiary amines are used as catalysts (c) and/or stabilizing amines (d). Some tertiary amines may under certain circumstances fill the role of a stabilizing amine (d) and under other circumstances, fill the role of tertiary amine catalyst (c). In examples, a mixture of N,N,N<SP>1</SP>,N<SP>1</SP>-tetramethyl - 1,3 - butane diamine and triethylamine are used as catalyst (c) in combination with one of the following stabilizing amines: N,N-diethylcyclohexylamine, N,N - dimethylethanolamine, N-methyldiethanolamine or N,N,N<SP>1</SP>,N<SP>1</SP> - tetraethylmethane diamine. In forming polyurethanes, especially foams, conventional blowing agents, and foam stabilizing agents may be added to the polyol composition which is then reacted with an organic polyisocyanate.</p> |
