Process for the production of polyamines

Details Process for the production of polyamines Process for the production of polyamines

1988-03-24

1989-06-27

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 44, 528 48, 528 52, 528 57, 564305, 564395, 564414, 564444, C08G 1814

Patent

active

048431087

ABSTRACT:
Polyamines are produced by hydrolyzing isocyanate compounds having an NCO content of from 0.5 to 40 wt. % with from 0.75 to 40 moles of water per equivalent of NCO groups in the presence of from 0.021 to 0.099 wt. % sodium hydroxide and at least 10 wt. % water-miscible polar organic solvent containing nitrile, ketone, sulfoxide or ether groups having a boiling point of from 56.degree. to 250.degree. C. The reaction mixture is maintained in a homogeneous phase. The reaction is carried out at 40.degree. to 170.degree. C. These polyamines are useful in the production of polyurethane(urea)s.

REFERENCES:
patent: 4386218 (1983-05-01), Rasshofer et al.
patent: 4515923 (1985-05-01), Fauss et al.
patent: 4540720 (1985-09-01), Rasshofer et al.
patent: 4565645 (1986-01-01), Rasshofer et al.
The Organic Chemistry of Nitrogen, by N. V. Sidgwick, Clarendon Press, Oxford, p. 236, 1966.
The Organic Chemistry of Nitrogen, by N. V. Sidgwick, Clarendon Press, Oxford, p. 326, 1966.
Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, by J. March, McGraw Hill, p. 658, 1968.

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