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US 2008/0076899 A1Published application
Process for preparing a curable silylated polyurethane resin
AssigneeGeneral Electric Company
InventorsBrendon J. O'Keefe, Holger J. Glatzer, Misty W. Huang, Christine Lacroix
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Abstract
The present invention relates to a process for the production of silylated polyurethane resins free of unreacted residual isocyanate possessing consistent viscosity and stability and products therefrom.
Claims25
A process for preparing a curable silylated polyurethane resin which comprises:
- a) silylating hydroxyl-terminated polyol polymer with isocyanatosilane to provide silylated polyurethane containing residual isocyanate;
- and,
- b) scavenging isocyanate present in the silylated polyurethane with at least one isocyanate-reactive scavenging agent to provide silylated polyurethane resin of reduced isocyanate content,
- the silylated polyurethane resin of reduced isocyanate content resulting from step (b) possessing a viscosity following aging which is less than that of the isocyanate-containing silylated polyurethane resin resulting from step (a) following the same conditions of aging.
1 more element
A curable composition comprising silylated polyurethane resin and the reaction product of isocyanate and at least one isocyanate-reactive scavenging agent.
Dependencies are inferred from the claim text.