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US 2008/0280144 A1Published application
Coating composition yielding abrasion-resistant tintable coatings
AssigneeThe Walman Optical Company
InventorGerald D. Treadway
Life of this patent
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Abstract
A coating composition based upon at least partially hydrolyzed epoxy-functional alkoxy silanes and having particular utility in forming tintable, abrasion resistant coatings on lenses. Incorporation in the composition of a non-hydrolyzed epoxy-functional alkoxy silane provides a desired reduction in viscosity. Incorporation in the composition of a polyether surfactant provides a cured coating of the composition with increased tintability.
Claims27
A substrate having a transparent, abrasion-resistant coating formed by the use of a coating composition comprising:
- a) the hydrolysis product of an epoxy-functional alkoxy silane,
- b) a curing agent for polymerizing epoxy compounds, the curing agent comprising a cationic photoinitiator,
- c) an ethylenically unsaturated monomer and photoactivated free-radical initiator therefore, and
- d) a viscosity-reducing amount up to 50% by weight, solids basis, of an unhydrolyzed epoxy-functional alkoxy silane,
- wherein the silanes of parts a) and d) are separately prepared and blended to form the composition and the composition is photocurable.
2 more elements
Dependencies are inferred from the claim text.