Surfactant for polyisocyanurate foams made with alternative blow

Details Surfactant for polyisocyanurate foams made with alternative blow Surfactant for polyisocyanurate foams made with alternative blow

1994-02-28

1994-11-08

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521114, 521131, 521902, C08G 1814

Patent

active

053627644

ABSTRACT:
A closed cell, rigid polyisocyanurate foam which comprises the reaction product of a polyisocyanate and a polyol in the presence of (a) a hydrogen-containing blowing agent or a mixture of a hydrogen-containing blowing agent and at least one co-blowing agent, and (b) a siloxane oxyalkylene copolymer (i) having a molecular weight below about 7500 and an oxyalkylene portion containing greater than 60 weight percent of oxyethylene units and (ii) being prepared by the reaction of an organohydrogensiloxane with a polyoxyalkylene in an essentially solventless system or in the presence of a high boiling point polar polyol.

REFERENCES:
patent: 4636529 (1987-01-01), Crooker
patent: 4847398 (1989-07-01), Mehta et al.
patent: 4857583 (1989-08-01), Austin et al.
patent: 5124366 (1992-06-01), Gluck et al.
patent: 5159096 (1992-10-01), Austin et al.

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