APPLICATION OF MIXTURE OF DIAMINOMETHYLCYCLOHEXANE STEREOISOMERS AS HARDENING AGENT OF EPOXY RESINS Russian patent published in 2015 - IPC C08G59/50 

FIELD: chemistry.

SUBSTANCE: invention relates to composition, containing at least one epoxy resin and mixture, containing seven stereoisomers of diaminomethylcyclohexane in absolutely particular quantitative ratio to each other. Composition, suitable for obtaining hardened epoxy resins, contains: a) at least one epoxy resin and b) mixture, containing seven isomers of 2,4- and 2,6-diamino-1-methylcyclohexane in ratio 75-95 wt %, 2,4- to 5-25 wt % 2,6-diamino-1-methylcyclohexane, composition is characterised by the fact that chromatographic measurement is performed by method of gas chromatography under specified conditions, with the following ranges corresponding to areas of chromatographic peaks: to peak 1 range from 4.0 to 49.0%, to peak 2 range from 0.3 to 9.0%, to peak 3 range from 9.0 to 19.0%, to peak 4 range from 11.0 to 30.0%, to peak 5 range from 3.0 to 10.0%, to peak 6 range from 8.0 to 40.0% and to peak 7 range from 1.0 to 10.0%, with sum of expressed in percent areas of chromatographic peaks counted per used quantity of 2,4- and 2,6-diamino-1-methylcyclohexane constituting 100%, with elimination of mixture, containing seven isomers of 2,4- and 2,6-diamino-1-methylcyclohexane with ratio 75-95 wt % of 2,4- to 5-25 wt % of 2,6-diamino-1-methylcyclohexane, to expressed in percent areas of chromatographic peaks of which, determined by said gas-chromatographic method and ordered in accordance of holding time growth, the following ranges correspond: to peak 1 range from 15.6 to 16.6%, to peak 2 range from 0.1 to 0.4%, to peak 3 range from 32.2 to 33.2%, to peak 4 range from 23.5 to 24.5%, to peak 5 range from 4.1 to 5.1%, to peak 6 range from 18.1 to 19,1% and to peak 7 range from 2.6 to 3.6%, with the sum of expressed in percent areas of chromatographic peaks, counted per used quantity of 2,4- and 2,6-diaminomethylcyclohexane constituting 100%. Also claimed are method of composition obtaining, its application, hardened epoxy resin, mixture for hardening, its application, method of obtaining hardened epoxy resin and method of product obtaining.

EFFECT: described hardening agent provides impact on viability of compositions, as well as provides higher vitrification temperature.

20 cl, 3 tbl, 9 ex