Thermodynamic mixture of alkyl substituted bi(cyclohexylamine) isomers
AssigneeAir Products and Chemicals, Inc.
InventorsPeter A. Lucas, Gamini A. Vedage, Jeremiah P. Casey
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Abstract
This invention pertains to alkyl substituted bi(cyclohexylamine) and derivatives having a high trans, trans-isomer distribution. This isomer distribution represents a thermodynamic mixture of the isomers and provides for extended pot life and extended thermal properties in epoxy resins which are not seen with the kinetic isomer mixture. The bridged cyclohexylamine and derivatives are represented by the formula: ##STR1## wherein; R.sup.1 is hydrogen or C.sub.1-4 alkyl; R.sup.2 is C.sub.1-4 alkyl; and R.sup.3 is hydrogen or C.sub.1-4 alkyl The invention also relates to epoxy resins cured with the bridged bi(cyclohexylamines).
Claims8
A mixture of bridged bi(cyclohexylamine) isomer derivatives represented by the formula:
- ##STR6## wherein;
- R.sup.1 is hydrogen or C.sub.1-4 alkyl;
- R.sup.2 is C.sub.1-4 alkyl;
- and
- R.sup.3 is hydrogen or C.sub.1-4 alkyl
- and characterized in that at least 50% of the isomers in the mixture are in the trans, trans-isomer configuration.
Dependencies are inferred from the claim text.