Fluoropolymer low reflecting layers for plastic lenses and...

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 127/12 (2006.01) C08J 7/04 (2006.01) C09D 127/16 (2006.01) C09D 127/18 (2006.01) C09D 127/20 (2006.01)

Patent

CA 2360903

A one or two layer coating system has been developed for plastic substrates. The one coating system low reflecting layer consists of VF2/TFE/HFP. In the two coating system is the upper coating layer consists of TFE/HFP, VF2/TFE/HFP, or TFE/Perfluorodioxole, and the lower coating layer consists of VF2/TFE/HFP, VF/TFE/HFP, VAc/TFE/HFIB, or TFE graft to PVOH. A new fluoropolymer composition was prepared for use in the coating systems, prepared by the copolymerization of vinyl acetate, tetrafluoroethylene, and hexafluoroisobutylene.

L'invention concerne un système de revêtement à une ou deux couches pour les substrats en plastiques. Un système de revêtement à une couche faiblement réfléchissante comprend VF¿2?/TFE/HFP. Dans le système de revêtement à deux couches, la couche de revêtement supérieure comprend TFE/HFP, VF¿2?/TFE/HFP ou TFE/Perfluorodioxole, et la couche de revêtement inférieure comprend VF¿2?/TFE/HFP, VF/TFE/HFP, VAc/TFE/HFIB ou TFE greffés sur PVOH. On a préparé une nouvelle composition fluoropolymère; elle est destinée aux systèmes de revêtement et a été préparée par la copolymérisation d'acétate de vinyle, de tetrafluoroéthylène et d'hexafluoro-isobutylène.

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