UV-Stabilized resins
AssigneeGeneral Electric Company
InventorTa-Yen Ching
Life of this patent
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Abstract
Polycarbonate resins can be stabilized against the adverse influence of UV light by incorporating an effective amount of a methyl benzoate ester stabilizer by means of a coating on the surface of the resin.
Claims9
A polycarbonate composition of matter comprised of (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a latent UV stabilizer of the formula ##STR6## applied to the polycarbonate resin surface by means of a carrier resin which can be cured in situ, the latent UV stabilizer having the properties of permitting UV light to cure the carrier resin without interference by the latent UV stabilizer and at a later time, the carrier resin has been cured to the insoluble state, the latent stabilizer by chemical rearrangement becomes activated as a UV stabilizer for the polycarbonate resin.
A composition of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a latent UV stabilizer comprising a compound having the formula:
- ##STR7## applied to the surface of the polycarbonate resin by means of a carrier resin comprising a UV curable polymethyl-methacrylate resin.
Dependencies are inferred from the claim text.