Coating system for glass strength retention

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 183/04 (2006.01) C03C 17/30 (2006.01) C03C 25/10 (2006.01) C03C 25/40 (2006.01) C09D 175/14 (2006.01) G02B 6/02 (2006.01)

Patent

CA 2184607

This invention provides an improved coating composition for glass substrates that comprises a poly(siloxane). The introduction of a poly(siloxane) in a coating composition for a glass substrate, and in particular an optical fiber, acts to delay the rate of deterioration of the glass or optical fiber due to moisture, and improves adhesion between the glass substrate and the coating composition. The introduction of a poly(siloxane) into a polymeric coating composition also improves the interlayer adhesion when more than one coating is applied to a glass substrate. This invention further relates to an outer primary coating composition or matrix material that comprises an acid functional ethylenically unsaturated monomer. This invention also provides an improved coated glass substrate having a decreased rate of deterioration due to moisture, improved adhesion between the glass substrate and the coating composition and between the various coatings, wherein the coating composition comprises a poly(siloxane).

Composition perfectionnée de revêtement pour substrats en verre. Cette composition comporte un poly(siloxane). L'adjonction d'un poly(siloxane) à une composition de revêtement pour un substrat en verre, et notamment pour une fibre optique, permet de retarder la détérioration due à l'humidité du verre ou de la fibre optique, et améliore l'adhésion entre le substrat en verre et la composition de revêtement. L'adjonction d'un poly(siloxane) à une composition polymère de revêtement permet également d'améliorer l'adhésion entre couches lorsque plusieurs couches sont appliquées sur un substrat en verre. On a également prévu une composition de revêtement primaire extérieur ou matière formant matrice, comportant un monomère éthyléniquement insaturé à fonction acide. En outre, on a prévu un substrat en verre revêtu perfectionné dans lequel la détérioration due à l'humidité est ralentie, l'adhésion entre le substrat en verre et la composition de revêtement et entre les différents revêtements est améliorée, et ladite composition de revêtement comporte un poly(siloxane).

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