Ink for erasable script

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C - Chemistry, Metallurgy

09

B

6/26, 400/8103,

C09B 69/10 (2006.01) C08C 19/30 (2006.01) C08J 3/00 (2006.01) C09B 67/20 (2006.01) C09B 69/06 (2006.01)

Patent

CA 1269788

COLORING MATERIAL AND PROCESS FOR PREPARATION THEREOF ABSTRACT OF THE DISCLOSURE Disclosed is a coloring material comprising a rubber having a sulfonic acid group or a salt thereof, which is dyed with a basic dye. The coloring material is prepared by adding a solution of an alkali in an alcohol to a solution of a chlorosulfonated polyolefin in an organic solvent and then adding a basic dye to the obtained reaction liquid, or adding a basic dye to a solution of a sulfonated product of a rubber in an organic solvent, and optionally removing the solvent from the obtained solution.

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