Process for producing polyurethane foams
Abstract
Abstract A PROCESS IS PROVIDED FOR THE PRODUCTION OF A FLEXIBLE POLYURETHANE FOAM WHEREIN PARTICULAR SILOXANEOXYALKYLENE BLOCK COPOLYMERS ARE EMPLOYED. THE OXYALKYLENE BLOCK OF THE COPOLYMER HAS A MOLECULAR WEIGHT OF AT LEAST 1500 AND THE FORMULA, R''O(CH3H6O)M(C2H4O)N, WHEREIN R'' IS A MONOVALENT HYDROCARBON GROUP HAVING FROM 1 TO 10 CARBON ATOMS. THE SILOXANE BLOCK OF THE COPOLYMER COMPRISES AT LEAST 40 AND UP TO 200 DIMETHYLSILOXANE UNITS AND CONSTITUTES FROM 15 TO 70 WEIGHT PERCENT OF THE BLOCK COPOLYMER. THE SILOXANEOXYALKYLENE COPOLYMERS EMPLOYED IN THE PROCESS HAVE IMPROVED POTENCY FOR THE STABILIZATION OF POLYETHER URETHANE FOAMS AND MAY BE USED IN THE FORM OF A SOLUTION IN A WATER-SOLUBLE ORGANIC SOLVENT.
Inventors
- 👤 Edward L Morehouse
Bibliographic Details
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