Coating composition yielding abrasion-resistant tintable...

C - Chemistry – Metallurgy – 09 – D

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C09D 183/06 (2006.01) C09D 4/00 (2006.01) C09D 4/06 (2006.01) G02B 1/10 (2006.01)

Patent

CA 2380006

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.

L'invention concerne une composition de revêtement basée sur des alkoxysilanes à fonctionnalité époxy partiellement hydrolysée au moins présentant une certaine utilité dans la formation de revêtements teintés anti-abrasifs de lentilles. On entraîne une réduction de la viscosité en incorporant un alkoxysilane à fonctionnalité époxy non hydrolysé dans cette composition. En incorporant dans cette composition un agent de surface polyéther, on peut obtenir une composition de revêtement polymérisé pouvant être davantage teinté.

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