1,3-Diaminocyclohexanes

Details 1,3-Diaminocyclohexanes 1,3-Diaminocyclohexanes

1988-04-13

1989-07-18

Hollrah, Glennon H.

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

Organic compounds

Amino nitrogen containing

564451, C07C 8524, C07C 8736

Patent

active

048495441

ABSTRACT:
Sterically hindered 1,3-diaminocyclohexanes which can be used in the preparation of polyurethane, polyurea, polyurethaneurea, and epoxy resins are prepared by hydrogenating a metaphenylenediamine having alkyl substituents of 1-6 carbons in the 4- and 6-positions and optionally also in the 2-position, at least one of the alkyl substituents containing at least two carbons, and the total number of carbons in the alkyl substituents being at least five, at a temperature of about 170.degree.-200.degree. C. and a pressure of at least about 6.9 MPa, preferably about 20-30 MPa, in the presence of a supported ruthenium catalyst and an activating amount of a modifier selected from alkali metal hydroxides and alkoxides and alkali metal amide salts of the meta-phenylenediamine to form the corresponding 1,3-diaminocyclohexane.

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