Cellular isocyanurate containing polymers
Abstract
Abstract HIGH TEMPERATURE RESISTANT, LOW FLAME SPREAD CELLULAR POLYMERS ARE DISCLOSED. THESE POLYMERS ARE OBTAINED BY POLYMERIZING POLYMETHYLENE POLYPHENYL ISOCYANATES CONTAINING 35 TO 85 PERCENT BY WEIGHT OF METHYLENEBIS(PHENYL ISOCYANATE) IN THE PRESENCE OF A TERTIARY AMINE AND A MONOMERIC HOMOCYCLIC POLYEPOXIDE AND/OR A POLYOL. THE AMOUNT OF TERTIARY AMINE EMPLOYED IS FROM ABOUT 0.01 EQUIVALENT TO ABOUT 0.25 EQUIVALENT PER EQUIVALENT OF POLYISOCYANATE. THE AMOUNT OF MONOMERIC HOMOCYCLIC POLYEPOXIDE IS FROM ABOUT 0.0045 EQUIVALENT TO ABOUT 0.5 EQUIVALENT PER EQUIVALENT OF POLYISOCYANATE. THE AMOUNT OF POLYOL IS FROM ABOUT 0.01 EQUIVALENT TO ABOUT 0.3 EQUIVALENT PER EQUIVALENT OF POLYISOCYANATE. THE NOVEL FOAMS ARE USEFUL IN THERMAL INSULATION AND LIKE APPLICATIONS WHERE RESISTANCE TO EXTREME TEMPERATURES AND LOW FLAME SPREAD REQUIREMENTS MUST BE MET.
Inventors
- 👤 G Comunale
- 👤 H Nadeau
Bibliographic Details
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