Curable epoxy resin systems containing mixtures of amine hardeners and an excess of epoxide groups

Patent metadata

Field	Value
Publication number	US-9688808-B2
Application number	US-201213529929-A
Country	US
Kind code	B2
Filing date	Jun 21, 2012
Priority date	Jun 30, 2011
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Fiber reinforced epoxy resin composites are produced using a specific epoxy resin system. The epoxy resin system contains at least one polyglycidyl ether of a polyphenol. The system also contains a hardener that contains a mixture of aminocyclohexanealkylamine and polyalkylene polyamine hardeners. The ratio of epoxy resin groups to amine hydrogen groups is from 1.05 to 1.50. The epoxy resin system contains a tertiary amine catalyst such as a tertiaryaminophenol, a benzyl tertiary amine or an imidazole compound.

First claim

What is claimed is:

1. A curable epoxy resin system, comprising
I. an epoxy resin component containing at least 80% by weight of a polyglycidyl ether of a polyphenol that has an epoxy equivalent weight of up to about 250 and contains no more than 1% by weight of monohydrolyzed resin species;
II. a hardener containing a mixture of primary and/or secondary amino compounds
primary and/or secondary amino compounds that contains from 55 to 80% by weight of isophorone diamine, from 20 to 45% by weight of diethylene triamine, and the hardener is devoid of other epoxy curing agents
wherein component I or II or both contains a catalytically effective amount of one or more tertiary amine catalysts,
and further wherein components I and II are present in amounts that provide from 1.05 to 1.5 epoxy groups per amine hydrogen in the hardener.

2. The curable epoxy resin system of claim 1 , wherein components I and II are present in amounts that provide from 1.08 to 1.35 epoxy groups per amine hydrogen in the hardener.

3. The curable epoxy resin system of claim 1 , which has a gel time of less than 10 minutes.

Assignees

• Morley Timothy A
• Karunakaran Radhakrishnan
• O'Connell Carol L
• Shields Nigel
• Verghese Nikhil K
• Reimers Martin
• Dow Global Technologies Llc

Inventors

• Morley Timothy A
• Karunakaran Radhakrishnan
• O'Connell Carol L
• Shields Nigel
• Verghese Nikhil K
• Reimers Martin

Classifications

• C08G59/5026

  cycloaliphatic · CPC title

• C08G59/502

  Polyalkylene polyamines · CPC title

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C08G59/50 Primary

  Amines · CPC title

• C08G59/5006

  aliphatic · CPC title