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US 9,957,427 B2Granted
Reactive adhesive with enhanced adhesion to metallic surfaces
AssigneeH.B. Fuller Company
InventorsBrian W. Carlson, Rituparna Paul, Mutombo J. Muvundamina, Felix D. Mai, David B. Malcolm
Life of this patent
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Abstract
Disclosed is an aqueous adhesive composition including a surface-deactivated solid isocyanate and a blend of two different polyurethanes. A method of making an article that includes a coated adhesive layer and article made thereby are also disclosed.
Claims26
An aqueous adhesive composition comprising:
- a surface-deactivated solid isocyanate;
- a first polyurethane dispersion including a first polyurethane having functional groups reactive with isocyanate;
- and
- a second polyurethane dispersion including a second polyurethane different from the first polyurethane, the second polyurethane being a carboxylic acid functional polyurethane having an acid number of from 10 to 30, and a unimodal weight average molecular weight (Mw) of no greater than about 50,000 g/mole.
1 more element
An article comprising:
- a substrate, and
- an adhesive layer disposed on at least one major surface of the substrate, the adhesive layer comprising a surface-deactivated solid isocyanate, a first polyurethane having functional groups reactive with isocyanate, and a second polyurethane different from the first polyurethane, the second polyurethane being a carboxylic acid functional polyurethane having an acid number of from 10 to 30, and a unimodal weight average molecular weight (Mw) of no greater than about 50,000 g/mole.
Dependencies are inferred from the claim text.