Primer coating for enhancing adhesion of liquid toner to...

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 7/04 (2006.01) B41M 5/52 (2006.01) C09D 133/02 (2006.01) C09D 175/04 (2006.01) C09D 193/04 (2006.01) D21H 19/24 (2006.01) G03G 9/08 (2006.01)

Patent

CA 2565365

A primer coating is provided for use on polymeric substrates to enhance adhesion of liquid toner to the substrates for printing in an electrophotographic printing device. The primer coating is water-based and includes a dispersion of a copolymer of ethylene and 5 acrylic or methacrylic acid, and a compatible adhesion enhancer selected from an aliphatic polyurethane dispersion, a hydrogenated hydrocarbon rosin or rosin ester dispersion, and an amorphous acrylic polymer dispersion. The coating may also include additives such as wetting agents, antiblocking agents, matting agents, and waxes. The primer coating may be applied to a variety of polymeric substrates including polypropylene, biaxially oriented to polpypropylene, polyethylene terephthalate, and polyvinyl chloride.

Il est prévu une couche primaire utilisée sur des substrats polymères pour renforcer l'adhésion de toner liquide aux substrats pour l'impression dans un appareil d'impression électrophotographique. La couche primaire est à base d'eau et comprend une dispersion d'un copolymère d'éthylène et de 5 acides acryliques ou méthacryliques, et un développeur d'adhésion compatible sélectionné dans une dispersion de polyuréthane aliphatique, une dispersion de colophane d'hydrocarbone hydrogénée ou de colophane estérifiée, et une dispersion de polymère acrylique amorphe. La couche peut aussi contenir des additifs comme des agents mouillants, des agents antiadhérents, des agents matifiants et des cires. La couche primaire peut être appliquée à une variété de substrats polymères comprenant du polypropylène, polypropylène bi-orienté, polyéthylène téréphthalate et polychlorure de vinyle.

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