Polyurethane foams manufactured with mixed gas/liquid blowing ag

Details Polyurethane foams manufactured with mixed gas/liquid blowing ag Polyurethane foams manufactured with mixed gas/liquid blowing ag

1989-05-22

1991-02-26

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252 67, 252 69, 25218224, C08K 500

Patent

active

049962426

ABSTRACT:
Disclosed are mixed halocarbon blowing agents comprising (1) halocarbons boiling below about 10.degree. C., (2) halocarbons boiling between 20.degree. C. and 35.degree. C., and (3) inert organic liquids having a boiling point from about 35.degree. C. to about 125.degree. C.
Also disclossed are blends of the above mixed blowing agents with active hydrogen containing compounds, particularly polyols and the rigid closed cell foams prepared from such blends.
Up to 60 percent reduction in hard halocarbons is realized with the mixed blowing agents.

REFERENCES:
patent: 4624970 (1980-11-01), Dwyer et al.
patent: 4714717 (1987-12-01), Londrigan et al.

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