Washable coloring composition suitable for use in dry erase...

C - Chemistry – Metallurgy – 09 – B

Patent

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Details

C09B 69/10 (2006.01) B44C 1/175 (2006.01) C09B 29/30 (2006.01) C09B 29/48 (2006.01) C09D 11/16 (2006.01)

Patent

CA 2219673

A washable dry erase coloring composition comprising an acid dye or polymeric dye colorant, a dye vehicle, a release agent, and a dyeblocker additive. The dyeblocker additive is either a sulfonated naphthalene condensation product or a sulfonated phenol-formaldehyde condensation product. The dry erase coloring composition is suitable for use in marking on a whiteboard and enhances fugitivity from skin and fabrics. The dry erase coloring composition may optionally contain a film forming resin. More specifically, the invention is, in one preferred embodiment, a washable erasable whiteboard marker ink comprising an acid dye or polymeric dye, water, a film forming resin, a release agent and a sulfonated phenol-formaldehyde condensation product.

Composition de coloration, lavable et effaçable à sec, renfermant un colorant acide ou un colorant polymérique, un véhicule pour colorant, un antiadhérent et un fixateur de colorant. Le fixateur est soit un produit de condensation de naphtalène sulfoné, soit un produit de condensation de phénol-formaldéhyde sulfoné. Cette composition convient pour le marquage sur un tableau blanc et améliore le caractère fugace de la coloration sur la peau et les tissus. La composition peut facultativement contenir une résine formant une pellicule. Plus spécifiquement, l'invention est, dans l'une de ses versions privilégiées, une encre de marqueur pour tableau blanc, lavable et effaçable, renfermant un colorant acide ou un colorant polymérique, de l'eau, une résine formant une pellicule, un antiadhérent et un produit de condensation de phénol-formaldéhyde sulfoné.

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