Process for the preparation of polyamines from N-monoaryl-N',N'-

Details Process for the preparation of polyamines from N-monoaryl-N',N'- Process for the preparation of polyamines from N-monoaryl-N',N'-

1982-10-28

1984-09-18

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...

564 38, 564 47, 564 48, 564 50, 560 24, 560157, 260453A, C07C12715, C07C12724

Patent

active

044725680

ABSTRACT:
This invention relates to an improved process for the preparation of aromatic polyamines containing urethane and/or biuret and/or urea and/or isocyanurate groups and preferably also ether groups by the hydrolysis of poly-N-monoaryl-N',N'-dialkyl urea compounds (1-aryl-3,3-dialkyl ureas). The ureas are obtained by the reaction of secondary aliphatic, cycloaliphatic or saturated heterocyclic amines with divalent to tetravalent isocyanate compounds containing isocyanate end groups attached to aromatic residues. The ureas correspond to the general formula: ##STR1## wherein R.sup.1, R.sup.2 denote alkyl or cycloalkyl groups, or together form a ring and

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