Solutions of polyisocyanate polyaddition products
AssigneeBayer Aktiengesellschaft
InventorsArtur Reischl, Gert Jabs
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Abstract
This invention relates to solutions of polyisocyanate polyaddition products with a solids content of from 5 to 70% by weight of A. Reaction products of (a) polyisocyanates, (b) hydrazines and/or polyamines and/or dihydrazides and/or ammonia and/or urea and/or low molecular weight polyols, (c) optionally higher molecular weight polyols and (d) optionally formaldehyde in B. polyhydric alcohols having a molecular weight of between 62 and 450.
Claims4
A process for the preparation of clear, transparent, uniform and homogeneous polyhydric alcohol solutions of polyisocyanate polyaddition products with a solids content of 5 to 70% by weight in 30 to 95% by weight polyhydric alcohol solvent having a molecular weight between 62 and 200 comprising reacting:
- (A) polyisocyanates or isocyanate containing prepolymers of polyisocyanates and higher molecular weight and/or low molecular weight polyhydroxyl compounds in situ with
- (B) hydrazines and/or polyamines and/or dihydrazides and/or ammonia and optionally formaldehyde in
- (C) polyhydric alcohols having a molecular weight of between 62 and 200,
- optionally in the presence of water, and the water, if used, being subsequently removed in known manner.
Clear, transparent, uniform and homogeneous polyhydric alcohol solutions of polyisocyanate polyaddition products with a solids content of from 5 to 70% by weight in 30 to 95% by weight polyhydric alcohol solvent having a molecular weight between 62 and 200, produced by the process comprising reacting:
- (A) polyisocyanates or isocyanate containing prepolymers of polyisocyanates and higher molecular weight and/or low molecular weight polyhydroxyl compounds in situ with
- (B) hydrazines and/or polyamines and/or dihydrazides and/or ammonia and optionally formaldehyde in
- (C) polyhydric alcohols having a molecular weight of between 62 and 200,
- optionally in the presence of water, and the water, if used, being subsequently removed in known manner.
Dependencies are inferred from the claim text.