Aromatic polyamines containing primary aromatic amino groups, ur

Details Aromatic polyamines containing primary aromatic amino groups, ur Aromatic polyamines containing primary aromatic amino groups, ur

1983-06-21

1985-07-30

Kight, John

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 64, 528480, 528488, 528489, 528482, 560 24, 560157, 560159, 564 38, 564 57, 564 59, 564 61, 564511, 564512, C07C12715, C07C12724

Patent

active

045323178

ABSTRACT:
Aromatic polyamines containing aromatic primary amino groups as well as urethane and polyester groups are made by hydrolyzing an isocyanate in the presence of a basic material and water to form a carbamate and then converting the carbamate groups to amino groups. The isocyanate starting material contains aromatic isocyanate groups (as well as urethane and polyester groups) and has an NCO content of from 0.5 to 11.5 wt %. The basic compound is selected from alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal silicates, alkali metal sulfides, alkali metal cyanides, tetraalkylammonium hydroxides and mixtures thereof. Water is used in a quantity such that at least one mole of water is present for each equivalent of NCO groups. The carbamate groups may be converted to amino groups by treating the carbamate-containing mixture with a proton donor or with heat or with a solvent. The product polyamines are particularly useful in the production of polyurethanes.

REFERENCES:
patent: 3385829 (1968-05-01), Heydkamp et al.
patent: 3931450 (1976-01-01), Patton, Jr. et al.
patent: 4224417 (1980-09-01), Hajek et al.
patent: 4286074 (1981-08-01), Davis et al.
patent: 4386218 (1983-05-01), Rasshofer et al.
Patent Abstracts of Japand, Band 4, No. 34, Mar. 22, 1980, p. 363c-JP-A-55,7829.

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