Urea group-containing polyisocyanates modified with long chain c

Details Urea group-containing polyisocyanates modified with long chain c Urea group-containing polyisocyanates modified with long chain c

1991-02-06

1993-02-02

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...

528 61, 528 64, 528 66, C08G 1810

Patent

active

051838761

ABSTRACT:
The present invention is directed to novel urea group-containing polyisocyanates modified with long chain compounds having molecular weights of 400 to about 10,000. The present invention is also directed to a process for the preparation of modified urea group-containing polyisocyanates by reacting starting polyisocyanates which are free from urea groups with water to form urea groups in an inert reaction medium or in an aqueous mixture containing a dispersion stabilizer, wherein the starting polyisocyanates are mixed or reacted with long chain compounds having molecular weights of 400 to about 10,000 before the reacting the starting polyisocyanates with water and/or the long chain compounds are added to the inert reaction medium and/or to the water.

REFERENCES:
patent: 4276386 (1981-06-01), Schwindt et al.
patent: 4321173 (1982-03-01), Schuhmacher et al.
patent: 4605756 (1986-08-01), Grogler et al.
patent: 4677136 (1987-06-01), Rasshofer et al.

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