Polyisocyanurate foams from digestion products of polyalkylene t

Details Polyisocyanurate foams from digestion products of polyalkylene t Polyisocyanurate foams from digestion products of polyalkylene t

1982-04-29

1987-12-08

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521129, 521160, 521173, 521902, C08G 1800, C08G 1814

Patent

active

047119128

ABSTRACT:
Polyisocyanurate foams are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol mixture prepared by digesting polyalkylene terephthalate, particularly polyethylene terephthalate, with a polyol, especially a glycol. Laminates of such foams exhibit a high degree of fire resistance, low smoke evolution on combustion, low foam friability and high compressive strength.

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patent: 4284683 (1981-08-01), Hipchen et al.
patent: 4316935 (1982-02-01), Moss
patent: 4417001 (1983-11-01), Svoboda et al.

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