Curing agent for the production of low gloss powder coatings based on epoxy resins
AssigneeSKW Trostberg Aktiengesellschaft
InventorsBenedikt Hammer, Thomas Guthner, Helmut Hintermaier
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Abstract
A curing agent for the production of low gloss powder coatings based on epoxy resins consists essentially of a mixture of the components a) 2-imidazoline derivative having a melting point of >60.degree. C. and b) cyanuric acid as well as, if desired, anticaking agents or/and stabilizers. The low gloss powder coatings produced with these curing agents have the desired low degrees of gloss and good adhesive strengths, they form smooth and uniform surfaces and show no signs of yellowing even after long stoving times.
Claims30
A curing agent composition for curing an epoxy resin comprising:
- a mixture of:
- a 2-imidazoline derivative having a melting point of greater than 60.degree. C.;
- and cyanuric acid
- wherein the proportions of the components of said curing agent to each other, and the proportion of said curing agent to said epoxy resin cured are sufficient to cure said resin into a low gloss coating and sufficient to provide substantial adhesiveness of said low gloss coating to a substrate.
An epoxy resin powder composition comprising:
- an epoxy resin:
- and
- as a curing agent, a combination of:
- a 2-imidazoline derivative having a melting point of greater than 60.degree. C.;
- and
- cyanuric acid
- wherein the proportions of the components of said curing agent to each other, and the proportion of said curing agent to said epoxy resin being sufficient to cure said powder into a low gloss coating and sufficient to provide substantial adhesiveness of said low gloss coating to a substrate.
Dependencies are inferred from the claim text.