Novel pre-dyes

Details Novel pre-dyes Novel pre-dyes

C - Chemistry, Metallurgy

09

B

C09B 11/12 (2006.01) C09B 7/00 (2006.01) C09B 15/00 (2006.01) C09B 19/00 (2006.01) C09B 21/00 (2006.01) C09B 57/00 (2006.01) C09B 67/28 (2006.01) G03C 1/73 (2006.01)

Patent

CA 2219450

One embodiment of the present invention is a method and compositin comprising a novel pre-dye molecule that is colorless and stable to ordinary light. The pre-dye molecule is capable of forming a color when exposed to certain wavelengths of electromagnetic radiation. A second embodiment of the present invention is a method of converting a conventional leuco dye to a colored composition by exposing the leuco dye admixed with a radiation transorber to certain wavelengths of electromagnetic radiation.

L'invention concerne, dans un mode de réalisation, un procédé et une composition qui contient une nouvelle molécule pré-colorante incolore et stable à la lumière ordinaire. La molécule pré-colorante peut former une couleur lorsqu'elle est exposée à certaines longueurs d'ondes de rayonnement électromagnétique. Dans un deuxième mode de réalisation, l'invention concerne un procédé de conversion d'un colorant leuco-ester classique en une composition colorée par exposition du colorant leuco-ester mélangé à un agent transabsorbant de rayonnement à certaines longueurs d'ondes de rayonnement électromagnétique.

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