# US 2019/0169357 A1 · Latent catalyst mixture for epoxy/anhydride compositions

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0169357 A1
- Document ID: US20190169357A1
- Status: Published application
- Kind: A1
- Application number: 16/320,907
- Filed: 2016-07-27
- Published: 2019-06-06
- Earliest claimed: 2016-07-27
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Yanli Feng; Minrong Zhu; Shaoguang Feng; Huan Chen; Jing Liu
- Web page: https://patentgrep.com/patent/US20190169357A1

## CPC

- C08G 59/42: Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
- C07D 233/58: with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring nitrogen atoms
- C08G 59/68: characterised by the catalysts used
- C08G 59/685: {Carboxylates}
- C08G 59/686: {containing nitrogen}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)

## 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.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the epoxy resin is present in the composition in an amount in the range of from 30 to 95 phr and the anhydride hardener is present in the composition in an amount in the range of from 1 to 60 phr.

### Claim 3 (depends on 1, 2)

The composition of any one of claims 1 or 2 wherein the imidazolium acetate catalyst is selected from the group consisting of 1-ethyl, 2-methyl-imidazolium acetate, 1,3-di-tert-butyl-imidazolium acetate, 1,3-didamantyl-imidazolium acetate, 1,3-diisopropyl-imidazolium acetate, and 1-butyl-3-methylimidazolium acetate.

### Claim 4

The composition of any one of the preceding claims, wherein the Lewis acid catalyst is chromium (III) carboxylate.

### Claim 5

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.

### Claim 6

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.

### Claim 7

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.

### Claim 8 (depends on 7)

A process in accordance with claim 7, wherein the latent catalyst is activated in step b) using heat.

### Claim 9 (depends on 1, 2, 3, 4, 5, 6)

A pultrusion process using the composition of any one of claims 1-6.

### Claim 10 (depends on 9)

A composite prepared by the pultrusion process of claim 9.