Tinted plastic articles and thermoplastic composition for...

Details Tinted plastic articles and thermoplastic composition for... Tinted plastic articles and thermoplastic composition for...

C - Chemistry, Metallurgy

08

J

C08J 7/06 (2006.01) C08L 69/00 (2006.01)

Patent

CA 2430658

A thermoplastic molding composition comprising a transparent resinous component suitable for tinting by dip-dye method is disclosed. The resinous component is selected from the group consisting of (i) a blend of (co)polycarbonate resin and (co) polycaprolacone, and (ii) a copolymer containing carbonate and caprolactone structural units. The composition, characterized in that it is free of photochromic colorants, may be molded by thermoplastic means, and the molded article is then dipped-dyed by immersion in a tinting solution. The tinted articles are suitable for making, among others, optical lenses.

L'invention concerne une composition de moulage thermoplastique comportant un composant résineux transparent adapté à la coloration par un procédé de teintage au trempé. Ce composant résineux est choisi dans le groupe constitué par (i) un mélange de résine (co)polycarbonate et de (co)polycaprolacone, et (ii) un copolymère contenant des unités structurelles carbonate et caprolactone. Cette composition, caractérisée en ce qu'elle est dépourvue de colorants photochromiques, peut être moulée à l'aide de moyens thermoplastiques. L'article moulé est ensuite teinté au trempé par immersion dans une solution de coloration. Ces articles teintés sont adaptés à la fabrication, entre autres, de lentilles optiques.

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