Aqueous fluorochemical compositions and abrasion-resistant...

C - Chemistry – Metallurgy – 08 – L

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Details

C08L 101/04 (2006.01) C08L 101/02 (2006.01) C09D 133/16 (2006.01) C09D 143/04 (2006.01) C09D 201/02 (2006.01) C09D 201/04 (2006.01)

Patent

CA 2225519

Water-based coating compositions comprise an aqueous solution, emulsion, or dispersion of (a) a water-soluble or water-dispersible polymer or oligomer having at least one anionic moiety which is capable of reacting with an oxazoline or oxazine moiety; (b) a water-soluble or water-dispersible polymer or oligomer having at least one oxazoline or oxazine moiety; and (c) colloidal silica; at least one of the components (a) and (b) further comprising at least one fluoroaliphatic moiety. The compositions can be used to form hard coatings having low surface energy and high abrasion resistance.

Cette invention concerne des compositions de revêtement à base d'eau, lesquelles se présentent sous forme d'une solution aqueuse, d'une émulsion ou d'une dispersion comprenant: (a) un polymère ou un oligomère soluble ou dispersible dans l'eau et possédant au moins un fragment anionique capable d'entrer en réaction avec un fragment d'oxazoline ou d'oxazine; (b) un polymère ou un oligomère soluble ou dispersible dans l'eau et possédant au moins un fragment d'oxazoline ou d'oxazine; et (c) au moins une silice colloïdale. L'un au moins des composants (a) et (b) comprend également au moins un fragment fluoroaliphatique. Ces compositions peuvent être utilisées afin de former des revêtements durs possédant une tension interfaciale faible et une grande résistance à l'abrasion.

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