Process for the production of polyisocyanates containing isocyan

Details Process for the production of polyisocyanates containing isocyan Process for the production of polyisocyanates containing isocyan

1976-11-01

1978-09-19

Cockeram, H.S.

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...

260 312N, 260 318R, 260453P, 528 53, 528 73, C07D25112, C08G 1818, C08G 1877, C08G 1882

Patent

active

041153731

ABSTRACT:
This invention relates to a new process for the production, in inert organic solvents, of physiologically compatible polyisocyanates containing isocyanurate groups which have a monomeric diisocyanate content, based on solids, of at most 0.7%, by weight. The process uses Mannich bases as the trimerizing catalyst at temperatures below 60.degree. C and the reaction is terminated at the desired degree of trimerization by thermally decomposing the catalyst or by deactivating with a catalyst poison.

REFERENCES:
patent: 2954365 (1960-09-01), Windemuth et al.
patent: 3206352 (1965-09-01), Gollis et al.
patent: 3248372 (1966-04-01), Bunge
patent: 3454533 (1969-07-01), Kerrigan et al.
patent: 3580868 (1971-05-01), Diehr et al.

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