An epichlorohydrin-based polyol and its application in the manufacture of flame-retardant rigid polyurethane foam
An epichlorohydrin-based polyol and its application in the manufacture
of flame-retardant rigid polyurethane foam
The possibility of applying a polyether polyol GE obtained in the addition reaction of epichlorohydrin and glycerol in the manufacture of flame-retardant rigid polyurethane foam has been investigated. The number average molecular weight of polyol was Mn = 410. The effect of the addition of amine-based polyols to the polyether polyol GE on the flammability and physical properties of rigid polyurethane foam has also been studied. Although only slight differences in flame retardancy and other physical properties have been found, the addition of amine-based polyols improved the solubility of Freon 11 in the polyol composition, decreased the rate of amine catalyst deactivation and eliminated the surface brittleness of foams. The principles of the manufacturing process of a rigid polyurethane foam from an optimum composition containing 1 part by weight of amine-based polyol and 3 parts by weight of polyether polyol GE (Polyol GEA) have been presented. The properties of the rigid phosphorus-free polyurethane foams from Polyol GEA were superior to those of the phosphorus-containing rigid polyurethane foams prepared with the use of imported preparations from various sources.
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