Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-04-09
1977-06-14
Czaja, Donald E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 25AC, 260 25AM, 260 25AW, C08G 1818, C08G 1830, C08G 1848
Patent
active
040296105
ABSTRACT:
Cellular foam compositions are prepared by catalytically condensing an organic polyisocyanate in the presence of a blowing agent, from 0.01 to 0.5 equivalent per equivalent of isocyanate of a primary hydroxy-terminated polyoxyalkylene or polyester polyol and a catalyst system comprising (a) methanol, (b) a tertiary amine trimerization catalyst, and (c) a urethane catalyst. The resulting foam compositions are characterized by carbodiimide, isocyanurate and urethane linkages and exhibit unexpectedly low friability, improved strength properties, and good flame retardancy.
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Cenker Moses
Narayan Thirumurti L.
BASF Wyandotte Corporation
Czaja Donald E.
Dunn Robert E.
Fletcher H. H.
Michaels Joseph D.
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