Process for producing toner for the development of an electric image

U.S. Patent Number: 5393636

Abstract: The present invention provides a process for producing a practical toner for the development of an electrostatic image which has an effect of preventing an offset phenomenon and has low-temperature fixing properties. The process for producing a toner of the present invention comprises the steps of dissolving a high-molecular polymer in a vinyl monomer, mixing the resultant solution with another toner material, and then carrying out suspension polymerization. Preferable examples of the high-molecular polymer include a polymer having a structure unit represented by the formula ##STR1## wherein R.sup.1 is hydrogen or a methyl group, and R.sup.2 is a straight-chain or branched alkyl group having 1 to 20 carbon atoms, and a polymer having a structure unit represented by the formula ##STR2## wherein R.sup.3 is hydrogen or a methyl group, and X is hydrogen, a methyl group, a halogen atom or a methoxy group.

Inventors: Sugita; Jun (Tenri, JP), Morita; Kazushige (Shiki, JP), Katayama; Satoshi (Nara, JP), Sugimura; Hiroshi (Habikino, JP), Nishigaki; Satoshi (Nara, JP), Emoto; Kazuhiro (Nara, JP)

Assignee: Sharp Kabushiki Kaisha (Osaka, JP)

Application Number: 08/255,895

Issued: 1995-02-28

Expired: 2007-02-28

Classes: 430/137.15 ; 430/109.3

Field of search: 430/109,110,137

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