Epoxy Resin and Epoxy Resin Composition

• US 20090012203A1
• Filed: 04/28/2006
• Published: 01/08/2009
• Est. Priority Date: 04/28/2005
• Status: Abandoned Application

• Current Assignee: Nippon Kayaku Company Limited
• Original Assignee: Nippon Kayaku Company Limited
• Inventors: Tanaka, Ryutaro, Nakanishi, Masataka
• Application Number:
  US11/918,976
• Publication Number:
  US 20090012203A1
• Time in Patent Office: Days
• US Class Current: 522/135
• CPC Class Codes: C08G 59/063 with epihalohydrins
• CPC Class Codes: C08G 59/08 from phenol-aldehyde condensates
• CPC Class Codes: C08G 59/1466 Acrylic or methacrylic acids
• CPC Class Codes: C08G 59/4215 cycloaliphatic
• CPC Class Codes: C08L 63/10 Epoxy resins modified by unsaturated compounds

Abstract

[PROBLEMS] The present invention relates to a crystalline epoxy resin, which gives a cured object excellent in various properties including flame retardancy, low water absorption, and impact resistance. The object of the present invention is to provide epoxy resin which is useful as an optical material, an epoxy resin composition containing crystals of the epoxy resin having excellent storage stability and a cured object obtained from the composition.
[MEANS FOR SOLVING PROBLEMS] The crystalline epoxy resin obtained by the glycidylation of the compound represented by the following formula (1).

Claims

1. A crystalline epoxy resin, wherein said epoxy resin is obtained by reacting a compound represented by the following formula (1):

and epihalohydrin.

2. An epoxy resin composition comprising the epoxy resin according to claim 1 and a curing agent for an epoxy resin.

3. An epoxy resin composition comprising the epoxy resin according to claim 1, a compound containing one or more unsaturated double bonds in the molecule and a photopolymerization initiator.

4. A cured product obtained by curing the epoxy resin composition according to claim 2 or 3.

5. An optical material using the epoxy resin composition according to claim 2 or 3.