Isocyanate terminated quasi-prepolymers useful for preparing pol

Details Isocyanate terminated quasi-prepolymers useful for preparing pol Isocyanate terminated quasi-prepolymers useful for preparing pol

1987-02-12

1988-12-13

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521173, 521174, 521182, 521902, C08G 1830

Patent

active

047911484

ABSTRACT:
Polyurethane/polyisocyanurate rigid foams having low thermal conductivity are prepared from isocyanate-terminated quasi-prepolymers prepared from polyester polyols derived from phthalic anhydride or from the transesterification of polyethylene terephthalate scrap.

REFERENCES:
patent: 4048104 (1977-09-01), Svoboda et al.
patent: 4223068 (1980-09-01), Carlstrom et al.
patent: 4506090 (1985-03-01), Brennan et al.
patent: 4636530 (1987-01-01), Narayan
patent: 4644027 (1987-02-01), Magnus et al.

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