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US 7,601,239 B1Granted
Liquid adhesive
AssigneeComptek Structural Composites of Colorado, Inc.
InventorsLawrence D. Cercone, James D. Lockwood
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Abstract
A low-expanding adhesive composition comprising: a diisocyanate, a surfactant and an activator is provided. The provided adhesive composition cures upon exposure to water. The adhesive composition can be used to bond wood, metal, glass, ceramic, leather, acrylic, PVC and combinations thereof.
Claims14
A moisture-activated adhesive composition consisting essentially of:
- 98.85-95.2% by weight of an aromatic diisocyanate prepolymerized resin of 3000-5000 average MW comprising methylene diphenyl 4,4′-di isocyanate, 2,4′-diisocyanate and 2,2′-diisocyanate isomers;
- 0.15-0.8% by weight 2′-dimorpholine diethyl ether;
- and
- 1-4% by weight polydimethylsiloxane surfactant;
- wherein the adhesive has unconstrained expansion of a maximum of 300% by volume.
2 more elements
A method for bonding surfaces together comprising:
- applying to a first surface a moisture-activated adhesive composition consisting essentially of:
- 98.85-95.2% by weight of an aromatic diisocyanate prepolymerized resin of 3000-5000 average MW comprising methylene diphenyl 4,4′-di isocyanate, 2,4′-diisocyanate and 2,2′-diisocyanate isomers;
- 0.15-0.8% by weight 2′-dimorpholine diethyl ether;
- and
- 1-4% by weight polydimethylsiloxane surfactant;
- contacting said first surface with a second surface under curing conditions;
- and
- curing the adhesive composition wherein the adhesive has unconstrained expansion of a maximum of 300% by volume.
5 more elements
A moisture-activated adhesive composition by combining the components consisting essentially of:
- 98.85-95.2% by weight of an aromatic diisocyanate prepolymerized resin of 3000-5000 average MW comprising methylene diphenyl 4,4′-di isocyanate, 2,4′-diisocyanate and 2,2′-diisocyanate isomers;
- 0.15-0.8% by weight 2′-dimorpholine diethyl ether;
- and
- 1-4% by weight polydimethylsiloxane surfactant, to form a homogenous liquid with an unconstrained expansion of a maximum of 300% by volume.
1 more element
Dependencies are inferred from the claim text.