STRUCTURAL ADHESIVE HAVING EXCELLENT ANTI-CORROSION PROPERTIES

• Main Authors: OKURI, YASUHIRO, SAKAKIBARA, TOSHIMORI
• Format: Patent
• Language: English; Korean
• Published: 24.04.1993
• Edition: 5
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

A structural adhesive having excellent anti-corrosion which comprises: (A) a rubber modified epoxy resin prepared by reaction of a bisphenol epoxy resin and a butadiene-acrylonitrile-(meth)acrylic acid copolymer, (B) an urethane modified epoxy resin, (C) a latent curing agent, and (D) a rust inhibiting pigment selected from the group consisting of: (i) a rust inhibiting pigment comprising aluminium orthophosphate and a zinc compound, (ii) a rust inhibiting pigment comprising aluminium metaphosphate, a zinc compound and/or an alkaline earth metal compound, and (iii) a rust inhibiting pigment comprising aluminium metaphosphate and a zinc compound and optionally an alkaline earth metal compound, wherein the adhesive contains said rubber modified epoxy resin (A) and said urethane modified epoxy resin (B) in a weight ratio of 1:9 to 3:1, and said latent curing agent (C) and said rust inhibiting pigment (D) at 0.1 to 30 % by weight and at 5 to 50 % by weight respectively based on a total amount of both modified epoxy resins (A) and (B) is disclosed. The structural adhesive of the present invention has an extremely excellent anti-corrosion and is useful for heming fixation especially at an edge between an outer panel and an inner panel of an automobile.