Sol gel process for producing protective films for polymeric...

Details Sol gel process for producing protective films for polymeric... Sol gel process for producing protective films for polymeric...

C - Chemistry, Metallurgy

08

J

C08J 5/18 (2006.01) C09D 183/04 (2006.01)

Patent

CA 2673329

Sol gel process for producing protective films for polymeric substrates Sol gel process for producing protective filmsfor polymeric substrates, the process relates to the sol gel reaction of a metal or semi-metal alkoxide carried out in certain conditions. The sols obtained were, without limiting, spin- or dip-coated onto polymeric substrates then thermally cured into transparent- abrasion resistant coating.Such coating transmit visible light, but absorb wavelengths of ultraviolet light which cause degradation of the substrate surface and resultant adhesion-loss of the protective coating upon weathering.

L'invention concerne un procédé sol-gel pour la fabrication de films protecteurs pour des substrats polymères. Le procédé se rapporte à la réaction sol-gel d'un alcoolate métallique ou semi-métallique effectuée dans certaines conditions. Les sols obtenus ont été, sans limitation, appliqués en revêtement par centrifugation ou par immersion sur des substrats polymères, puis durcis thermiquement en un revêtement transparent, résistant à l'abrasion. Un tel revêtement transmet la lumière visible, mais absorbe les longueurs d'onde de la lumière ultraviolette provoquant une dégradation de la surface du substrat et la perte d'adhésion résultante du revêtement protecteur lors d'une exposition aux intempéries.

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