One-pack type epoxy resin composition

• US 6,225,417 B1
• Filed: 07/27/1999
• Issued: 05/01/2001
• Est. Priority Date: 08/26/1998
• Status: Expired due to Fees

• Current Assignee: Nisshinbo Industries, Inc. (Kawasaki Heavy Industries Limited)
• Original Assignee: Nisshinbo Industries, Inc. (Kawasaki Heavy Industries Limited)
• Inventors: Imashiro, Yasuo, Nakamura, Norimasa, Ito, Takahiko, Tomita, Hideshi
• Primary Examiner(s): SELLERS, ROBERT E
• Application Number:
  US09/361,303
• Time in Patent Office: 644 Days
• Field of Search: 525/452, 525/528
• US Class Current: 525/452
• CPC Class Codes: C08G 18/025 the polymeric products containing carbodiimide groups
• CPC Class Codes: C08G 59/4021 Ureas; Thioureas; Guanidines; Dicyandiamides
• CPC Class Codes: C08L 2666/20 Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: C08L 79/02 Polyamines

Abstract

The present invention provides a one-pack type epoxy resin composition comprising an epoxy resin having at least two epoxy groups in the molecule and a polyguanidine. The one-pack type epoxy resin composition has high storage stability, can be made into a film, is curable at relatively low temperatures, and has high adhesivity.

Claims

1. A one-pack epoxy resin composition comprising an epoxy resin having at least two epoxy groups in the molecule and a polyguanidine having a molecular weight of from 5,000 to 100,000 which is obtained by modifying a polycarbodiimide with an amine.

2. A one-pack epoxy resin composition according to claim 1, wherein the polyguanidine is represented by the following formula:

wherein R₁ and R₂ are each independently an residue of the amine used for modification of the polycarbodiimide;

R is a bivalent organic group; and

n is a value such that the polyguanidine has a molecular weight of from 5,000 to 100,000.

3. A one-pack epoxy resin composition according to claim 1, wherein the amount of the epoxy resin is 0.8 to 1.2 equivalents per equivalent of the polyguanidine.