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US 12,421,431 B2Granted
Structural adhesive compositions
AssigneePPG Industries Ohio, Inc.
InventorsTien-Chieh Chao, Masayuki Nakajima, Hongying Zhou, Shanti Swarup, Umesh C. Desai
Life of this patent
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Abstract
An adhesive composition comprising an epoxy compound and a compound comprising at least one aminimide functional group is disclosed. The compound comprising the at least one aminimide functional group is present in an amount from 2-8% by weight based on total weight of the adhesive composition and reacts with the epoxy compound upon activation by an external energy source. The adhesive composition also may comprise an amidine salt.
Claims19
An adhesive composition comprising:
- an epoxy compound;
- a compound in an amount of two to eight percent by weight based on total weight of the adhesive composition and comprising an aminimide functional group;
- a reaction product of reactants comprising an amidine and a carbonic acid, a salt of a carbonic acid, a carbonate, or combinations thereof;
- and
- a secondary latent curing catalyst comprising an amine, an imidazole, and/or a urea;
- wherein the compound reacts with the epoxy compound upon activation by an external energy source.
3 more elements
An adhesive composition comprising:
- an epoxy compound in an amount of 50 percent by weight to 90 percent by weight based on total weight of the composition;
- a compound in an amount of two percent by weight to eight percent by weight based on total weight of the adhesive composition and comprising an aminimide functional group, the compound comprising a polymeric compound comprising a reaction product of reactants comprising an epoxy compound, a hydrazine, and an anhydride functional material;
- a reaction product of reactants comprising an amidine and a phenol and present in an amount of 1 percent by weight to 4 percent by weight based on total weight of the composition;
- and
- a secondary latent curing catalyst in an amount of 1 percent by weight to 5 percent by weight based on total weight of the composition and comprising an amine, an imidazole, and/or a urea;
- wherein the compound reacts with the epoxy compound upon activation by an external energy source.
3 more elements
Dependencies are inferred from the claim text.