Preparation of aromatic polyisocyanates

Details Preparation of aromatic polyisocyanates Preparation of aromatic polyisocyanates

1993-10-18

1995-02-21

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...

560338, 560347, C08G 1870

Patent

active

053916832

ABSTRACT:
Aromatic polyisocyanates, e.g., toluene diisocyanate, are prepared by reacting/contacting at least one aromatic compound (A) bearing at least two primary amine substituents, e.g., toluenediamine, xylylenediamine and/or phenylenediamine,, with phosgene, in gaseous phase and in a reactor/reaction zone devoid of active mechanical stirring.

REFERENCES:
patent: 2480089 (1949-08-01), Slocombe et al.

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