Curable composition, cured product thereof, photochromic...

C - Chemistry – Metallurgy – 08 – L

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C08L 43/04 (2006.01) C08F 220/36 (2006.01) C08F 230/08 (2006.01) C08G 18/81 (2006.01) C08K 5/00 (2006.01) C08L 39/00 (2006.01) C09D 4/00 (2006.01) G02B 5/23 (2006.01)

Patent

CA 2455630

A useful curable composition giving a coating which has high adhesion to the substrate and to a hard coat layer and which has highly excellent photochromic properties, i.e., a high developed-color density, a high fading rate, and excellent durability. The composition comprises (1) 100 parts by weight of one or more radical-polymerizable monomers comprising a silyl monomer such as .gamma.-methacryloyloxypropyltrimethoxysilane and/or an isocyanate monomer such as a 2-isocyanatoethoxymethacrylate, (2) 0.01 to 20 parts by weight of an amine compound, and (3) 0.01 to 20 parts by weight of a photochromic compound. Applying this composition as a coating material to a resinous substrate gives a photochromic optical material which has excellent adhesion between the photochromic coating layer and the substrate.

La présente invention concerne une composition durcissable donnant un revêtement qui présente un fort pouvoir d'adhésion à un substrat et à une couche de revêtement dure et de très bonnes propriétés photochromes, c'est-à-dire une densité de couleur hautement développée, une grande vitesse de décoloration et une très grande durabilité. Cette composition comprend (1) 100 parties en poids d'un ou de plusieurs monomères pouvant subir une polymérisation radicalaire, comprenant un monomère silyle, tel qu'un .UPSILON.-méthacryloyloxypropyltriméthoxysilane, et/ou un monomère isocyanate tel qu'un 2-isocyanatoéthoxyméthacrylate, (2) de 0,01 à 20 parties en poids d'un composé aminé et (3) de 0,01 à 20 parties en poids d'un composé photochrome. L'application de cette composition en tant que matériau de revêtement sur un substrat résineux donne un matériau optique photochrome qui présente un très bon pouvoir d'adhésion entre la couche de revêtement photochrome et le substrat.

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