Latent catalyst mixture for epoxy/anhydride compositions
AssigneeDow Global Technologies LLC
InventorsYanli Feng, Minrong Zhu, Shaoguang Feng, Huan Chen, Jing Liu
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Abstract
A composition comprising, consisting of, or consisting essentially of a) an epoxy resin; b) an anhydride hardener; and c) a latent catalyst which is a mixture of i) a Lewis acid catalyst; and ii) an imidazolium acetate catalyst, is disclosed.
Claims10
A composition comprising
- a) an epoxy resin;
- b) an anhydride hardener;
- and
- c) a latent catalyst which is a mixture of
- i) a Lewis acid catalyst;
- and
- ii) an imidazolium acetate catalyst.
The composition of any one of the preceding claims, wherein the Lewis acid catalyst is chromium (III) carboxylate.
The composition of any one of the preceding claims, wherein the latent catalyst is present in the composition in an amount in the range of from 0.1 to 15 phr.
The composition of any one of the preceding claims, wherein the ratio of Lewis acid catalyst to imidazolium acetate catalyst is in the range of from 1:10 to 10:1.
A process of making the composition of any one of the preceding claims, said process comprising
- a) admixing i) the epoxy resin;
- ii) the anhydride hardener;
- and iii) the latent catalyst;
- and
- b) activating the latent catalyst.
Dependencies are inferred from the claim text.