Polyamines and a single-stage process for the production thereof

Details Polyamines and a single-stage process for the production thereof Polyamines and a single-stage process for the production thereof

1983-07-06

1985-06-25

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525131, 525452, 525453, 525454, 525455, 528 53, 528 54, 528 57, 528 60, 528 65, 528 68, 528499, C08G 1808, C08G 1810

Patent

active

045255342

ABSTRACT:
Polyamines containing aromatic and/or aliphatic primary amino groups are produced by hydrolyzing an isocyanate compound in the presence of water, an insoluble basic compound as a catalyst and a water-miscible solvent in a single reaction step. The isocyanate compound has an NCO-content of from 0.5 to 40 wt % and is preferably a prepolymer. The (pH-) basic compound is substantially insoluble in both water and the organic solvents generally used in such processes. An isocyanate-reactive compound may also be included in the reaction mixture in an amount which is from 0.1 to 15 wt % (based on isocyanate compound). The hydrolysis reaction is generally carried out at a temperature from 50.degree. to 165.degree. C. in a manner such that the reaction mixture remains substantially homogeneous. The product polyamines contain from 0.19 to 20.3 wt % primary amino groups. These polyamines are particularly useful in the production of polyurethanes.

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