Polyamines and a process for their production

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

1983-11-21

1986-03-25

Helfin, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560 26, 560360, 564393, 549292, C07C 8750, C07C12506, C07C 8520

Patent

active

045785007

ABSTRACT:
Compounds containing from 0.15 to 20.3 wt. % aromatic amino groups are produced by hydrolyzing an isocyanate compound mixed with water and a solvent or solvent mixture at -20.degree. to 185.degree. C. The isocyanate starting material must contain at least two aromatically bound isocyanate groups and an isocyanate content of from 0.5 to 40 wt. %. The water must be used in at least a stoichiometric amount but is preferably used in excess. The solvent or solvent mixture must contain 50-100 wt. % solvent containing ether and/or thioether bonds. A partly water-soluble solvent may be used in an amount no greater than 50 wt. % total solvent. No acidic or basic catalysts are present during the hydrolysis. The product amine may be isolated by phase separation, filtration or extraction. The amines thus-produced are particularly useful in the production of polyurethane(urea)s.

REFERENCES:
patent: 2888439 (1959-05-01), Simons
patent: 2888440 (1959-05-01), Frazer et al.
patent: 3398106 (1968-08-01), Hostettler et al.
patent: 4386218 (1983-05-01), Rasshofer et al.
Naegeli et al, (I) Helv. Chim. Acta., vol. 21 (1938) 1100-1126.
Naegeli et al, (II) Chem. Abs., vol. 33 (1939) 539.
N. V. Sidgwick, The Organic Chemistry of Nitrogen, Clarendon Press, Oxford, p. 326 (1966).
J. March, Advanced Organic Chemistry: Reactions, Mechanisms and Structure, McGraw-Hill Book Co., New York, p. 658 (1968).
Organic Syntheses, Coll., vol. IV, 819 (1963).
E. Mohr, J. Prakt. Chem., 71, 133 (1905).
C. Naegeli et al, Helv. Chim. Acta., 21, 1100 (1938).

Affiliated with

Also associated with

Rating

Polyamines and a process for their production does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyamines and a process for their production, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyamines and a process for their production will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-632078