Color-neutral uv blocking coating for plastic lens

Details Color-neutral uv blocking coating for plastic lens Color-neutral uv blocking coating for plastic lens

C - Chemistry, Metallurgy

09

D

C09D 5/00 (2006.01) C09D 5/32 (2006.01) C09D 7/12 (2006.01) G02B 1/04 (2006.01) G02B 1/10 (2006.01) G02C 7/10 (2006.01)

Patent

CA 2247298

Polymeric coatings containing both UV absorbers and dyes are employed to produce transparent, durable film coatings that can significantly increase the level of UV radiation blockage when coated onto substrates including ophthalmic lenses. The dye comprises 1-[(4-methylphenyl)amino]-4-hydroxy-9,10- anthracenedione. The color-neutral film coatings are resistant to weather and UV degradation.

On utilise des revêtements polymères contenant des absorbeurs UV et des colorants afin de produire des revêtements en couches minces transparentes et durables pouvant augmenter sensiblement le niveau d'arrêt des rayonnements UV lorsqu'ils sont appliqués en couches sur des substrats, notamment des lentilles ophtalmiques. Le colorant comprend 1-[(4-méthylphényl)amino]-4-hydroxy-9,10-anthracènedione. Les revêtements sous forme de couches minces à neutralité chromatique sont résistants à une dégradation par les conditions atmosphériques et les UV.

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