Process for the production of urethane-modified polyisocyanurate

Details Process for the production of urethane-modified polyisocyanurate Process for the production of urethane-modified polyisocyanurate

1989-11-22

1991-06-25

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C08G 1814

Patent

active

050267370

ABSTRACT:
A process for producing a urethane-modified polyisocyanurate foam comprises mixing a polyisocyanate component, a polyl component containing an aromatic polyester polyol, a catalyst, a foaming agent, a surfactant and other additives under high pressure in a mixing head and then spraying the resultant mixture to expand the foaming ingredient therein. The process uses, as the catalyst, at least three compounds of N,N',N"-tris(dimethylaminopropyl)-S-hexahydrotriazine, an alkali metal carboxylate and a lead compound in combination.

REFERENCES:
patent: 3989651 (1976-11-01), Lockwood et al.
patent: 4710521 (1987-12-01), Soukup et al.

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