Process for the preparation of uretdione group containing polyis

Details Process for the preparation of uretdione group containing polyis Process for the preparation of uretdione group containing polyis

1990-08-16

1992-09-22

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...

2521822, 25218221, 528 73, 540202, 548951, C08G 1874

Patent

active

051497662

ABSTRACT:
The present invention relates to a process for the preparation of uretdione group containing polyisocyanates comprising reacting monomeric aromatic diisocyanates in the presence of 1,2-dimethylimidazole used as a catalyst in an inert organic solvent whereby the weight ratio of solvent to diisocyanate lies in a range of from 0.1:1 to 2:1.

REFERENCES:
patent: 3357939 (1967-12-01), Reischl et al.

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