Method for scavenging acidic impurities from polymeric isocyanat

Details Method for scavenging acidic impurities from polymeric isocyanat Method for scavenging acidic impurities from polymeric isocyanat

1986-08-19

1987-04-28

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

C07C13700

Patent

active

046616276

ABSTRACT:
Disclosed is a process for reducing the acid content and thereby increasing the reactivity of a polymethylene polyphenylisocyanate which comprises contacting said polyisocyanate with an effective amount of a poly(N-vinylimidazole).

REFERENCES:
patent: 3155699 (1964-11-01), Powers
patent: 3179680 (1965-04-01), Kober
patent: 3264336 (1966-08-01), Powers
patent: 3373182 (1968-03-01), Powers
patent: 3458558 (1969-07-01), Cheng
patent: 3516950 (1970-06-01), Haggis
patent: 3793362 (1974-02-01), Kolakowski
patent: 3799963 (1974-03-01), Adams

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