Process for the preparation of modified polyisocyanates

Details Process for the preparation of modified polyisocyanates Process for the preparation of modified polyisocyanates

1981-01-26

1982-03-16

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453A, 260453AM, 260453AL, 544400, C07C119042, C07C119045, C07C119048

Patent

active

043200672

ABSTRACT:
A process for preparing modified polyisocyanates in which an organic polyisocyanate is reacted with a polyamine present in less than stoichiometric amount. Polyamines suitable to this process include (a) polyamines having more than three nonaromatically bound, basic nitrogen atoms of which at least two are primary and/or secondary amino nitrogen atoms, and (b) polyamine mixtures having an average of more than three nonaromatically bound, basic nitrogen atoms of which at least two are primary and/or secondary amino nitrogen atoms. These modified polyisocyanates are particularly useful starting materials for production of polyurethane plastics by the isocyanate-polyaddition process.

REFERENCES:
patent: 3903126 (1975-09-01), Woerner et al.
patent: 3943158 (1976-03-01), Dietrich et al.
patent: 4118411 (1978-10-01), Reiff et al.
patent: 4147714 (1979-04-01), Hetzel et al.
patent: 4264519 (1981-04-01), Hennig et al.

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