Epoxy resin hardener compositions
View Patent ↗The invention relates to epoxy resin hardener compositions containing at least one mercaptan hardener and at least one metal salt of C 8-24 carboxylic acids. These hardeners are distinguished in particular by the fact that catalyzed resins containing epoxy resins and the hardener compositions according to the invention give high-gloss molding compounds, more particularly coatings, after hardening by crosslinking.
1. A method of hardening an epoxy resin comprising combining a composition comprising at least one mercaptan hardener and at least one metal salt of ricinoleic acid with an epoxy resin.
2. The method according to claim 1 , wherein the composition further comprises at least one amide resin hardener.
3. The method according to claim 2 , wherein the at least one metal salt of a carboxylic acid comprises zinc ricinoleate.
4. The method according to claim 1 , wherein the composition further comprises at least one amine resin hardener.
5. The method according to claim 4 , wherein the at least one metal salt of a carboxylic acid comprises zinc ricinoleate.
6. The method according to claim 1 , wherein the at least one metal salt of a carboxylic acid comprises zinc ricinoleate.
7. The method according to claim 1 , wherein the at least one metal salt is present in an amount of from 0.01 to 5% by weight, based on the at least one mercaptan hardener.
8. A process for producing a high-gloss epoxy resin coating, said process comprising combining a component (A) comprising at least one epoxy resin and a component (B) comprising at least one mercaptan hardener and at least one metal salt of ricinoleic acid, homogenizing the combination of component (A) and component (B) to form a catalyzed resin, and allowing said resin to cure.
9. The process according to claim 8 , wherein said catalyzed resin is cured at a temperature of from about 50° C. to about 50° C.
10. The process according to claim 9 , wherein said catalyzed resin is cured in the presence of one or more additives selected from the group consisting of amine resin hardeners and amide resin hardeners.
11. The process according to claim 10 , wherein the at least one metal salt of a carboxylic acid comprises zinc ricinoleate.
12. The process according to claim 9 , wherein the at least one metal salt of a carboxylic acid comprises zinc ricinoleate.
13. The process according to claim 8 , wherein said catalyzed resin is cured in the presence of one or more additives selected from the group consisting of amine resin hardeners and amide resin hardeners.
14. The process according to claim 13 , wherein the at least one metal salt of a carboxylic acid comprises zinc ricinoleate.
15. The process according to claim 8 , wherein the at least one metal salt of a carboxylic acid comprises zinc ricinoleate.
16. The process according to claim 8 , wherein the at least one metal salt is present in component (B) in amount of from 0.01 to 5% by weight, based on the at least one mercaptan hardener.
17. An epoxy resin hardener composition comprising at least one mercaptan hardener and zinc ricinoleate.
18. The composition according to claim 17 , further comprising at least one amide resin hardener.
19. The composition according to claim 17 , further comprising at least one amine resin hardener.
20. The epoxy resin hardener composition according to claim 17 , wherein the zinc ricinoleate is present in an amount of from 0.01 to 5% by weight, based on the at least one mercaptan hardener.