Water-curable, hot melt adhesive composition
AssigneeExxon Chemical Patents Inc.
InventorsJay D. Audett, Mun F. Tse
Life of this patent
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Abstract
A water-curable hot melt adhesive system is disclosed. The system uses silane hydrolyzable functionality grafted onto an ethylene polymer component, and a tackifier compatible therewith. The ethylene polymer component is a copolymer of ethylene and a hydrocarbyl ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, and the tackifier component provides the adhesive with sufficient silanol condensation catalytic activity to accelerate water curing. The formulation is applied to a substrate surface as a hot melt at a moderate temperature, and subsequently cured by moisture or in a warm water bath. The invention also embodies structural compositions having glass, metallic or leather surfaces adhered with the adhesive and a method for making structural composites.
Claims18
A water curable, hot melt adhesive composition, comprising a blend of:
- (a) a copolymer of ethylene and an ester of an .alpha.-.beta. ethylenically unsaturated carboxylic acid having grafted silane functionality wherein said copolymer comprises ethylene in an amount from about 50 to about 95 parts by weight copolymerized with said ester in an amount from about 5 to about 50 parts by weight;
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- (b) a tackifier having an acid number of at least about 5, said adhesive composition being essentially free of metal carboxylate and/or stearic acid silanol condensation catalysts.
A water curable, hot melt adhesive composition consisting essentially of a blend of:
- (a) a copolymer of ethylene and an ester of an .alpha.-.beta. ethylenically unsaturated carboxylic acid having grafted silane functionality wherein said copolymer comprises ethylene in an amount from about 50 to about 95 parts by weight copolymerized with said ester in an amount from about 5 to about 50 parts by weight;
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- (b) a tackifier having an acid number of at least about 5, said adhesive composition being essentially free of metal carboxylate and/or stearic acid silanol condensation catalysts.
Dependencies are inferred from the claim text.