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...
Patent
1979-12-19
1983-02-08
Torrence, Dolph H.
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...
260453AB, 521159, 521160, 528 59, 528 67, 525127, C08G 1878, C07C12724
Patent
active
043730809
ABSTRACT:
The present invention relates to a process for the production of specific polyisocyanates by reacting diamines containing hydrogen atoms which are active in the context of the isocyanate addition reaction with excess quantities of organic diisocyanates. The invention also relates to a modification of the above process characterized in that the diamines are reacted first with excess quantities of a first diisocyanate after which the thus obtained reaction product which contains a urea group and a biuret group is reacted in a second stage with a second diisocyanate. The invention also relates to the use of polyisocyanates as the isocyanate component in the production of polyurethane plastics by the isocyanate-polyaddition process.
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Konig Klaus
Reichmann Wolfgang
Schonfelder Manfred
Bayer Aktiengesellschaft
Harsh Gene
Pope Lawrence S.
Roy Thomas W.
Torrence Dolph H.
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