Method for effecting adhesion using laminates from epoxy resins
AssigneeCiba-Geigy Corporation
InventorsMadan M. Bagga, Christopher H. Bull
Life of this patent
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Abstract
Compositions useful as adhesives, sealants, laminating resins and coatings comprise (a) an epoxide resin (b) a nitrogen-containing latent curing agent for this resin, such as dicyandiamide or isophthalic acid dihydrazide and (c) as accelerator for the cure, and dispersed as a powder in (a) and (b), a solid solution of a nitrogen base having a boiling point above 130.degree. C. and a polymer of an unsaturated phenol. Typical nitrogen bases used in (c) include benzyldimethylamine, 2-methylaminoethanol, isophorone diamine triethylene tetramine, and 2-methylimidazole. Typical polymeric phenols include poly(p-vinylphenol).
Claims20
A method for effecting adhesion between two surfaces which comprises
- (i) applying to at least one of said surfaces a composition comprising
- (a) an epoxide resin,
- (b) an effective amount of a nitrogen-containing latent curing agent for the epoxide resin, and
- (c) as cure accelerator dispersed as a powder in a mixture of (a) and (b), an effective amount of a solid solution of a nitrogen base having a boiling point above 130.degree. C. and a phenolic polymer which is an addition polymer of a phenol bearing an unsaturated substitutent,
- (ii) placing said surfaces together with the composition positioned therebetween to form an assembly, and
- (iii) heating the assembly until the composition solidifies.
An assembly comprising two surfaces adhered together by a composition comprising
- (a) an epoxide resin,
- (b) an effective amount of a nitrogen-containing latent curing agent for the epoxide resin, and
- (c) as cure accelerator dispersed as a powder in a mixture of (a) and (b), an effective amount of a solid solution of a nitrogen base having a boiling point above 130.degree. C. and a phenolic polymer which is an addition polymer of a phenol bearing an unsaturated substituent,
- said composition being heat-cured.
Dependencies are inferred from the claim text.