Multisolvent-based film-forming compositions

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 5/00 (2006.01) C08L 101/00 (2006.01) C09D 4/06 (2006.01) C09D 7/00 (2006.01) C09D 133/06 (2006.01)

Patent

CA 2291119

Substantially permanent or removable coatings can be prepared from a composition comprising a polymer dissolved or dispersed in a multicomponent medium that contains water, a low-boiling polar organic solvent, and a high- boiling point solvent. The polymer is characterized by containing structural units formed from the polymerization of a polymerizable strong cationic monomer, a polymerizable acid monomer, and optionally a non-interfering monomer. The composition forms a dust-free and tack-free film that can be removed by a combination of water and an organic solvent. The film can also be made resistant to organic solvents as well as acids and bases with the addition of a cross-linking agent to the composition.

On décrit des revêtements sensiblement permanents ou enlevables qui se préparent à partir d'une composition comprenant un polymère dissout ou dispersé dans un milieu à plusieurs éléments contenant de l'eau, un solvant organique polaire à bas point d'ébullition et un solvant à haut point d'ébullition. Le polymère se caractérise en ce qu'il contient des unités structurelles formées à partir de la polymérisation d'un monomère cationique fort polymérisable, d'un monomère d'acide polymérisable et, éventuellement, d'un monomère à interférence nulle. Cette composition forme une pellicule sans poussière et non adhésif pouvant être enlevée avec de l'eau additionnée d'un solvant organique. Il est également possible de conférer à la pellicule la résistance aux solvants organiques ainsi qu'aux acides et aux bases, en utilisant ladite composition additionnée d'un agent de réticulation.

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