Aromatic polyisocyanurate resins and process therefor

Details Aromatic polyisocyanurate resins and process therefor Aromatic polyisocyanurate resins and process therefor

1993-09-13

1994-06-21

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 53, 528 54, 528 59, C08G 1820

Patent

active

053229142

ABSTRACT:
The invention consists of a composition containing a chemically blocked trimerization catalyst and a polyurethane prepolymer resin or resins with reactive isocyanate groups. In the absence of heat, the catalyst is not active and the solution of catalyst in the resin undergoes no appreciable reaction for periods ranging from hours to weeks depending upon the composition and concentration of the catalysts and the structure and concentration of the isocyanate groups. When heat is applied to the mixture a trimerization reaction occurs which produces a crosslinked polyurethane network with utility as an elastomer or as an adhesive.

REFERENCES:
patent: 4033908 (1977-07-01), Hopkins, Jr. et al.
patent: 4126742 (1978-11-01), Carleton et al.
patent: 4602049 (1986-07-01), Regelman
patent: 4855383 (1989-08-01), Dammann et al.
patent: 4880845 (1989-11-01), Moss et al.
patent: 5102918 (1992-04-01), Moriya et al.

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