RIGID POLYURETHANE FOAMS
Process for the preparation of rigid polyurethane foams comprising the step of reacting an organic polyisocyanate with an isocyanatereactive material in the presence of a blowing promotor which is an isocyanate-reactive cyclic carbonate or cyclic urea, and in the presence of an inert, insoluble orga...
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Main Authors | , |
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Format | Patent |
Language | English French |
Published |
26.01.1995
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | Process for the preparation of rigid polyurethane foams comprising the step of reacting an organic polyisocyanate with an isocyanatereactive material in the presence of a blowing promotor which is an isocyanate-reactive cyclic carbonate or cyclic urea, and in the presence of an inert, insoluble organic liquid and a metal salt catalyst and a polyether polyol of average nominal functionality 2 to 6 and number average equivalent molecular weight between 1000 and 2000. |
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Bibliography: | Application Number: CA19942166071 |