Curing agent for epoxy resins

Patent metadata

Field	Value
Publication number	US-11518845-B2
Application number	US-201816476986-A
Country	US
Kind code	B2
Filing date	Feb 5, 2018
Priority date	Feb 6, 2017
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

The present disclosure provides a curing agent comprising a polyetheramine, a tertiary amine and an alkanolamine. The curing agent may be combined with an epoxy resin to form a curable composition which is capable of being applied to a substrate and cured to form a cured article.

First claim

What is claimed is:

1. A curing agent comprising: (i) from about 85% to about 95% by weight of a polyetheramine selected from the group consisting of: a polyether monoamine, a polyether diamine, a polyether triamine, a multifunctional polyetheramine and a mixture thereof; (ii) from about 1% to about 3% of a tertiary amine wherein the tertiary amine is trimethylamine, triethylamine, tri-n-propylamine, tri-iso-propylamine, tri-n-butylamine, dimethylaminocyclohexane or N-methylmorpholine; and (iii) from about 5% to about 12% by weight of an monoethanolamine, where the % by weight is based on the total weight of the curing agent.

2. The curing agent of claim 1 , wherein the polyetheramine is a polyether diamine.

3. The curing agent of claim 2 , wherein the polyether diamine has the formula (3), (4) or (5):

where c is an integer from about 2 to about 100,
H is hydrogen, Me is methyl and Et is ethyl;

where H is hydrogen, Me is methyl, Et is ethyl,
e is an integer from about 2 to about 40, and
d and f independently are integers from about 1 to about 10; or

where g is an integer form about 2 to about 3.

4. The curing agent of claim 1 , wherein the monoethanolamine is a compound having the formula R a NH 2 where R a is a linear or branched alkyl group of 1 to 10 carbons and which contains at least one primary hydroxyl group.

5. A curable composition comprising: (a) an epoxy resin; and (b) the curing agent of claim 1 , wherein the curable composition is substantially free of a core-shell polymer.

6. The curable composition of claim 5 , wherein the epoxy resin is selected from the group of: a polyglycidyl epoxy compound; a non-glycidyl epoxy compound; an epoxy cresol novolac compound; an epoxy phenol novolac compound; and a mixture thereof.

7. The curable composition of claim 6 , wherein the epoxy resin is a polyglycidyl epoxy compound.

8. The curable composition of claim 6 , wherein the epoxy resin is a non-glycidyl epoxy compound.

9. The curable composition of claim 5 , further comprising an additive.

10. The curable composition of claim 5 , wherein the curable composition is a 2-package type composition.

11. A cured article obtained by applying the curable composition of claim 5 to a substrate and curing the curable composition to form the cured article.

Assignees

• Huntsman Petrochemical Llc

Inventors

• Su Wei-Yang
• Zhou Hui

Classifications

• C08G59/504 Primary

  containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen · CPC title

• C08G59/245

  aromatic · CPC title

• C08G59/5026

  cycloaliphatic · CPC title

• C08G59/68

  characterised by the catalysts used · CPC title

• C08G59/64

  Amino alcohols · CPC title