Polyamines and a process for their production

Details Polyamines and a process for their production Polyamines and a process for their production

1983-06-21

1985-05-07

Lee, Lester L.

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

Synthetic resins

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

252182, 525131, 525452, 525453, 525454, 525455, 528 53, 528 54, 528 57, 528 60, 528 61, 528 64, 528 65, 528 68, 528499, 564 61, 564393, 564414, 564511, C08G 1818, C09K 300

Patent

active

045159238

ABSTRACT:
Polyamines containing aromatically bound primary amino groups having an NH.sub.2 -content of from 0.19 to 20.3 wt % are produced by a single stage process. A compound containing aromatically bound NCO-groups and having an isocyanate content of from 0.5 to 40 wt % is hydrolyzed with an excess of water in the presence of a water-miscible polar solvent and optionally a catalyst. The hydrolysis is carried out at a temperature of from -10.degree. to 150.degree. C. in a manner such that the reaction mixture is substantially homogeneous. The water-miscible polar solvent generally has a boiling point of from 56.degree. to 250.degree. C. and a dielectric constant of at least 10. This polar solvent is used in a quantity of at least 5 parts solvent for every 100 parts of isocyanate. Tertiary amines are the preferred catalysts. These polyamines are particularly useful in the production of polyurethanes.

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H. Ulrich et al.-J. Org. Chem., 33, 3928-3930-(1968).

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