Cyclic amidines useful as catalysts in the hardening of epoxide resins
AssigneeBayer Aktiengesellschaft
InventorsRolf-Volker Meyer, Hans-Joachim Kreuder, Erwin Hohl
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Abstract
Cyclic amidines which are modified by the incorporation of additional polar groups, may be used as catalysts for hardening heat-curable resin compositions comprising polyepoxides and optionally carboxyl group-containing polymers. Such amidine catalysts yield a high reactivity, an excellent storage stability and result in elastic coatings which show a high gloss and a good resistance to solvents.
Claims3
Compounds corresponding to the formula ##STR17## in which R.sup.1 to R.sup.6 independently of one another represent a hydrogen atom, a C.sub.1 -C.sub.4 -alkyl, C.sub.5 -C.sub.10 -cycloalkyl, C.sub.7 -C.sub.13 -aralkyl or a C.sub.6 -C.sub.18 -aryl group or two substituents R.sup.1 /R.sup.2, R.sup.3 /R.sup.4, R.sup.5 /R.sup.6, R.sup.1 /R.sup.3 or R.sup.1 /R.sup.5 together represent a C.sub.1 -C.sub.5 -alkenylene group, R.sup.7 representa a member of the group consisting of ##STR18##
Compounds corresponding to the formula ##STR19## in which R' represents a C.sub.1 -C.sub.4 -alkyl radical or a hydrogen atom and
- R.sup.7 represents a member of the group consisting of ##STR20##
Dependencies are inferred from the claim text.