| 摘要 |
1. The method of stabilising poli-oxy-alkylene-trioles with the molecular weight of 1000-6000 for producing elastic freonless polyurethane foams consists in introducing antioxidants, in the form of a mixture of 2,6-di-tert-butylo-4-methylphenol with phenothiazine, into the product purified of the catalyst. Characterized in that: A composition of antioxidants is introduced to the poly-oxy-alkylene-triol, produced by polyaddition of propylene oxide and ethylene oxide to oxypropylenated glycerine. The mixture consists of 0.08-0.4 percent by mass of 2,6-di-tert-butylo-4-methylphenol, 0.01-0.1 percent by mass of tri-nonyl-phenol phosphite and 0.002-0.02 percent by mass of phenothiazine. 2. The method of stabilizing poli-oxy-alkylene trioles with the molecular weight of 1000-6000 for producing elastic freonless polyurethane foams consists in introducing antioxidants, in the form of a mixture of 2,6-di-tert-butylo-4-methylphenol with phenothiazine, into the product purified of the catalyst. Characterized in that: A composition of antioxidants is introduced to the poly-oxy-alkylene-triol, produced by polyaddition of propylene oxide and ethylene oxide to oxypropylenated glycerine. The mixture consists of 0.04-0.2 percent by mass of 2,6-di-tert-butylo-4-methylphenol, 0.04-0.2 percent by mass of p,p'-dioctylo-diphenylamine, 0.01-0.1 percent of tri-nonyl-phenol phosphite and 0.002-0.02 percent by mass of phenothiazine.
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