Decolorizable toner and process for preparing the same
First Claim
1. A decolorizable toner comprising a visible ray-near infrared ray-absorbing dye, a decolorizing agent and a resin binder, said toner comprising a continuous phase of a resin binder B and a dispersed phase of a resin binder A having an acid value of 8 to 30 mg KOH/g which is incompatible with said resin binder B and is dispersed in said resin binder B, wherein said visible ray-near infrared ray-absorbing dye and said decolorizing agent are incorporated in said resin binder A.
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Accused Products
Abstract
What is disclosed a decolorizable toner of which main components are a visible ray-near infrared ray-absorbing dye, a decolorizing agent and a resin binder, characterized in that a resin binder A containing the visible ray-near infrared ray-absorbing dye is dispersed in a resin binder B and that the decolorizing agent is blended with at least one of the resin binder A and the resin binder B, and a process for preparing the same. The visible ray-near infrared ray-decolorizable toner of the present invention can be speedily decolorized by irradiating with visible rays to near infrared rays. Also, according to the process of the present invention, it is easy to adjust its electrically charged amount by a material having electrification property, and there is obtained a visible ray-near infrared ray-decolorizable toner which is hardly faded during the kneading in the production of the toner.
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9 Claims
- 1. A decolorizable toner comprising a visible ray-near infrared ray-absorbing dye, a decolorizing agent and a resin binder, said toner comprising a continuous phase of a resin binder B and a dispersed phase of a resin binder A having an acid value of 8 to 30 mg KOH/g which is incompatible with said resin binder B and is dispersed in said resin binder B, wherein said visible ray-near infrared ray-absorbing dye and said decolorizing agent are incorporated in said resin binder A.
- 6. A process for preparing a decolorizable toner comprising a visible ray-near infrared ray-absorbing dye, a decolorizing agent and a resin binder, which comprises melt-kneading a resin binder A having an acid value of 8 to 30 mg KOH/g and containing the visible ray-near infrared ray-absorbing dye and the decolorizing agent with a resin binder B incompatible with said resin binder A so as to disperse said resin binder A into said resin binder B, cooling the resulting mixture of said resin binders A and B and thereafter pulverizing said mixture.
Specification