Polysilazane-based coating and use thereof for coating...

Details Polysilazane-based coating and use thereof for coating... Polysilazane-based coating and use thereof for coating...

C - Chemistry, Metallurgy

09

D

C09D 183/16 (2006.01)

Patent

CA 2588623

The invention relates to a coating for coating films, which comprises, dissolved in a solvent, polysilazane or a mixture of polysilazanes of general formula (I) -(SiR'R'-NR''')n-, wherein R' R'', R''' are the same or different and independently represent hydrogen or an optionally substituted alkyl, aryl or (trialkoxysilyl)alkyl group, wherein n is an integer and is selected in such a manner that the polysilazane has a number average molecular weight of 150 to 150.000 g/mol, and at least one catalyst. The invention also relates to a method for coating films, especially polymer films, to coated films and to film composites.

L'invention concerne un revêtement servant à enduire des films, contenant: une solution de polysilazane ou un mélange de polysilazanes, dans un solvant, de formule générale (I) -(SiR'R -NR )n-, dans laquelle R R , R sont identiques ou différents et représentent, indépendamment l'un de l'autre, hydrogène ou un radical alkyle, aryle ou (trialcoxysilyl)alkyle, n étant un nombre entier et étant sélectionné de sorte que le polysilazane présente un poids moléculaire moyen en nombre de 150 à 150 000 g/mol; ainsi qu'au moins un catalyseur. L'invention concerne en outre un procédé pour enduire des films, notamment des films polymères, ainsi que des films et des composites, constitués de plusieurs films, ainsi revêtus.

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