Photochromic coating compositions, methods of making coated...

C - Chemistry – Metallurgy – 09 – D

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C09D 5/22 (2006.01) C08L 75/04 (2006.01) C09D 175/04 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2598046

Described are ungelled coating compositions of photochromic material, precursor materials for a first polymer polymerizable by free-radical initiated polymerization and precursor materials for a second or additional polymer(s) different from the first polymer. When the second polymer is selected from polyurethane, poly(urea-urethane) and mixtures thereof, the precursor materials include at least one blocked polyisocyanate. Also described are methods of making photochromic articles using the ungelled coating compositions and the photochromic articles produced using these methods.

L'invention concerne des compositions de revêtement non gélifiées de matériau photochrome, des matériaux précurseurs destinés à un premier polymère polymérisable par polymérisation en présence d'un radical libre et des matériaux précurseurs destinés à un second polymère ou à des polymères supplémentaires différent(s) du premier polymère. Lorsque le second polymère est sélectionné dans le groupe constitué par un polyuréthanne, un poly(urée-uréthanne) et des mélanges de ceux-ci, les matériaux précurseurs comprennent au moins un polyisocyanate séquencé. L'invention concerne également des procédés de production d'articles photochromes à l'aide des compositions de revêtement non gélifiées et les articles photochromes produits à l'aide desdits procédés.

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