Liquid diphenylmethane diisocyanate

Details Liquid diphenylmethane diisocyanate Liquid diphenylmethane diisocyanate

1993-09-02

1994-06-07

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 45, 528 49, 528 55, 528 67, 25218222, 560 27, C08G 1872

Patent

active

053190530

ABSTRACT:
The present invention relates to a stable, liquid MDI prepolymer containing an allophanate-modified MDI, having an NCO content of 12 to 32.5% comprising a reaction product of an aliphatic alcohol and diphenylmethane diisocyanate comprising about 2 to 60% by weight 2,4'-diphenylmethane diisocyanate and less than 6% by weight of the 2,2'-diphenylmethane diisocyanate, and the rest being 4,4'-diphenylmethane diisocyanate.

REFERENCES:
patent: 3644457 (1972-02-01), Konig et al.
patent: 4055548 (1977-10-01), Carleton et al.
patent: 4115429 (1978-09-01), Reiff et al.
patent: 4118411 (1978-10-01), Reiff et al.
patent: 4160080 (1979-07-01), Koenig et al.
patent: 4261852 (1981-04-01), Carroll et al.
patent: 4490300 (1984-12-01), Allen et al.
patent: 4738991 (1988-04-01), Narayan
patent: 4866103 (1989-09-01), Cassidy et al.
patent: 4910333 (1990-03-01), Slack

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