Photochromic polymer compositions and articles thereof

Details Photochromic polymer compositions and articles thereof Photochromic polymer compositions and articles thereof

C - Chemistry, Metallurgy

09

K

C09K 9/02 (2006.01) C09K 11/06 (2006.01) G02B 5/23 (2006.01)

Patent

CA 2471143

Described is a photochromic polymer composition including the reaction product of at least one polymerizable photochromic material and at least one other copolymerizable material having a glass transition temperature of less than 23~C upon polymerization. The photochromic polymer composition is adapted to provide an increased Fade Half Life in the Photochromic Polymer Performance Test as compared to the same photochromic compound used in the reaction product, but free of polymerizable groups. Also described are photochromic articles including the photochromic polymer composition.

L'invention concerne une composition polymère photochromique comprenant le produit réactionnel d'au moins une matière photochromique polymérisable et d'au moins une autre matière copolymérisable présentant une température de transition vitreuse inférieure à 23 ·C au moment de la polymérisation. Cette composition polymère photochromique est conçue pour présenter une demi-vie d'affaiblissement photochromique plus longue lors de l'analyse fonctionnelle de polymères photochromiques, par comparaison avec le même composé photochromique utilisé dans le produit réactionnel mais sans groupes polymérisables. L'invention se rapporte en outre à des articles photochromiques comprenant cette composition polymère photochromique.

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