Structural adhesive having excellent anti-corrosion properties

Details Structural adhesive having excellent anti-corrosion properties Structural adhesive having excellent anti-corrosion properties

1988-11-29

1990-07-24

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523436, 523451, C08K 552, C08K 338, C08K 326, C08K 322

Patent

active

049436040

ABSTRACT:
A structural adhesive having excellent anti-corrosion properties 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 aluminum orthophosphate and a zinc compound, (ii) a rust inhibiting pigment comprising aluminum metaphosphate, a zinc compound and/or an alkaline earth metal compound, and (iii) a rust inhibiting pigment comprising aluminum 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 extremely excellent anti-corrosion properties and is useful for heming fixation especially at an edge between an outer panel and an inner panel of an automobile.

REFERENCES:
patent: 4804710 (1989-02-01), Nakata et al.
patent: 4845136 (1989-07-01), Saito et al.

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