Multi-layer article
Assignee3M Innovative Properties Company
InventorsCharlie Chia-Tie Ho, Clarence Fullbright, Jr.
Life of this patent
Estimating the term…
Abstract
A multi-layered article comprising a first layer of a thermoset polyurethane. A second layer of a polymeric composition is bonded to the first layer. The polyurethane has available isocyanate groups prior to the application of the second layer. The second layer is applied onto the first layer in a pre-polymeric or polymeric state wherein the material has carboxyl groups and a cross-linking agent.
Claims31
A multi-layered article, comprising a first layer of a thermoset polyurethane, a second layer of a polymeric composition bonded to said first layer, said second layer of a polymeric composition applied onto said first layer in a polymeric or pre-polymeric state having carboxyl groups and a cross-linking agent, and wherein said first layer has available isocyanate groups prior to applying said second layer, the cross-linking agent reacted with the available isocyanate groups of said first layer and with the carboxyl groups of said second layer.
A multi-layered article comprising, comprising a first layer of a thermoset polyurethane produced from a primary isocyanate, a second layer of a polymeric composition bonded to said first layer, wherein said first and second layer of said multi-layered article each exhibit a urethane linkage under FTIR test results at 25° C., said urethane linkage exhibiting a hydrogen bonded carbonyl peak equal to or smaller than a free carbonyl peak.
A method for forming a multi-layered article, comprising
- (a) providing a layer of a thermosettable polyurethane having available isocyanate groups;
- (b) bonding a layer of a polymeric composition or a pre-polymeric composition to said layer of thermosettable polyurethane, wherein said polymeric has carboxyl groups and a cross-linking agent;
- and
- (c) curing said thermosettable polyurethane,
- wherein the cross-linking agent reacts with the available isocyanate groups of the thermosettable polyurethane and with the carboxyl groups of the polymeric composition or pre-polymeric composition.
Dependencies are inferred from the claim text.