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US 5,688,837 AGranted
Method of improving adhesion of polyurethane foam to polycarbonate and articles made thereby
AssigneeGeneral Electric Company
InventorsHerbert Shin-I Chao, Carol Lynn Fasoldt, Abbas Mohamad Safieddine, Christian Lietzau
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Abstract
A method improves the adhesion of polyurethane foam to polycarbonate by providing reactive groups on the polycarbonate surface. The adhesion is further improved by utilizing a polyurethane mix with an isocyanate index greater than 82. Articles comprising polycarbonate and polyurethane foam adhered to the polycarbonate by the method of the instant invention, such as automobile dashboards, are also provided.
Claims20
A method for adhering polyurethane foam to polycarbonate comprising:
- a. providing nucleophilic reactive radicals on a polycarbonate surface,
- b. generating a polyurethane mix comprising at least one polyol and at least one diisocyanate, wherein said polyurethane mix exhibits an isocyanate index of greater than 82, and,
- c. foaming the polyurethane mix on said polycarbonate surface.
Dependencies are inferred from the claim text.