Composite polyester films used as final coatings medium

Details Composite polyester films used as final coatings medium Composite polyester films used as final coatings medium

C - Chemistry, Metallurgy

08

J

117/197

C08J 7/04 (2006.01) C08F 283/02 (2006.01) C09D 151/08 (2006.01) G11B 5/71 (2006.01) G11B 5/725 (2006.01) G11B 5/73 (2006.01)

Patent

CA 2028100

Oriented composite polyester films comprising on at least one surface a coating for improving the slippery texture thereof, consisting of a grafted polymer comprising a core derived from a sulphonyloxy group polyester and polymer pattern grafts derived from at least one unsaturated ethylene nomoner and at least one unsaturated ethylene organosiloxane. The composite polyester films, according to the invention, are especially suitable for the manufacture of magnetic tapes.

PRECIS DE LA DIVULGATION: L'invention concerne des films polyester composites orientés comportant sur au moins une face un revêtement destiné à en améliorer les propriétés de glissant, constitué par un polymère greffé comportant un tronc dérivé d'un polyester à groupes sulfonyloxy et par des greffons de motis polymères dérivés d'au moins un monomère à insaturation éthylénique et d'au moins un organosiloxane éthyléniquement insaturé. Les films polyester composites selon l'invention conviennent tout particulièrement bien pour la fabrication de bandes magnétiques.

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