Modified carbodiimide-containing polyisocyanates and glassy poly

Details Modified carbodiimide-containing polyisocyanates and glassy poly Modified carbodiimide-containing polyisocyanates and glassy poly

1979-12-18

1981-04-07

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...

260239A, 260453AR, 260453AM, 260464, 2604654, 260465D, 528 75, C07C119055, C07C12722, C08G 1881

Patent

active

042607183

ABSTRACT:
Novel liquid organic polyisocyanate compositions are disclosed which are obtained by reacting a carbodiimide-containing organic polyisocyanate with a carboxylic acid terminated butadiene-acrylonitrile low molecular weight copolymer in the proportions of from about 2 to about 30 parts of the copolymer per 100 parts of the polyisocyanate provided there is from about 0.01 to about 0.5 carboxylic acid equivalent per equivalent of carbodiimide.
The liquid polyisocyanates are particularly useful in providing hard glassy polyurethanes having improved impact strengths.

REFERENCES:
patent: 3285949 (1966-11-01), Siebert et al.
patent: 4077989 (1978-03-01), Schafer et al.

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