Curable epoxy resin composition comprising an epoxy resin and a reactive diluent

• US 3,945,972 A
• Filed: 10/07/1974
• Issued: 03/23/1976
• Est. Priority Date: 10/09/1973
• Status: Expired due to Term

• Current Assignee: Nitto Kasei Co., Ltd., Osaka Soda Co., Ltd.
• Original Assignee: Nitto Kasei Co., Ltd., Osaka Soda Co., Ltd.
• Inventors: Sakamoto, Kazuhiko
• Primary Examiner(s): Czaja, Donald E.
• Assistant Examiner(s): Pertilla, T.
• Application Number:
  US05/512,977
• Time in Patent Office: 533 Days
• Field of Search: 260/30.4 EP, 260/2 BP, 260/348 R, 260/47 EP, 260/59, 260/47.4 EP, 260/2 EP, 260/18 PF
• US Class Current: 525/507
• CPC Class Codes: C08G 59/145 Compounds containing one epoxy group

Abstract

A curable epoxy resin composition comprising an epoxy resin and a reactive diluent, at least 60% by weight of the total amount of said reactive diluent consisting of a specific etherified polyepichlohydrin monoglycidyl ether and/or etherified polymethylepichlorohydrin monoglycidyl ether. The above etherified product is prepared by addition-polymerizing 2 to 10 mols of a compound selected from the group consisting of epichlorohydrin and methylepichlorohydrin with a monohydric phenol or alcohol and treating the resulting addition polymer with an alkaline substance.

Claims

1. A curable epoxy resin composition comprising an epoxy resin having at least two epoxy groups selected from glycidyl and methylglycidyl in the molecule and a reactive diluent, at least 60% by weight of the total amount of said reactive diluent consisting of a compound expressed by the following formula (I) ##EQU5## wherein R is a member selected from the group consisting of straight-chain alkyl containing 1 to 7 carbon atoms, branched-chain alkyl containing 1 to 7 carbon atoms, alkenyl containing 2 to 7 carbon atoms, cycloalkyl containing 5 to 6 carbon atoms, methyl-substituted cycloalkyl containing 6 to 7 carbon atoms, phenyl cresyl and benzyl R'"'"' is a hydrogen atom or methyl, a plurality of R'"'"' groups may be the same or different, and n is a positive integer of 1 to 9.

2. The epoxy resin composition of claim 1 wherein the amount of said reactive diluent is 1 to 150 parts by weight per 100 parts by weight of said epoxy resin.

3. The epoxy resin composition of claim 1 wherein said epoxy resin is a bisphenol A. glycidyl ether type epoxy resin derived from bisphenol A and epichlorohydrin.

4. The curable epoxy resin composition of claim 1 wherein at lease 80% by weight of the total amount of said reactive diluent consists of the compound expressed by formula (I).

5. The curable epoxy resin composition of claim 1 wherein said epoxy resin is selected from the group consisting of:

Bisphenol A.glycidyl ether epoxy resins;

phenol novolac polyglycidyl ether epoxy resins;

cresol novolac polyglycidyl ether epoxy resins;

brominated bisphenol A.diglycidyl ether epoxy resins;

hydrogenated bisphenol A.diglycidyl ether epoxy resins;

diglycidyl ether epoxy resins derived from alkylene oxide-added bisphenol A and epichlorohydrin and containing an alkylene ether in the side chain;

resorcinol.diglycidyl ether epoxy resins;

phthalic acid diglycidyl ester epoxy resins; and

bisphenol A.methylepichlorohydrin epoxy resins.