| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a toner-binding resin capable of efficiently reducing the amount of residual styrene in the resin and the toner-binding resin obtained by the method. SOLUTION: The method for producing the toner-binding resin comprises a step (A) for subjecting addition polymerization resin monomers including styrene to addition polymerization and a step (B) for mixing a reaction mixture produced in the step (A) and fumaric acid and/or maleic acid during and/or after the completion of the step (A), wherein the amount of fumaric acid and/or maleic acid to be mixed in the step (B) is 0.05-10 pts.wt. based on 100 pts.wt. of the addition polymerization resin monomers. The method for producing the toner-binding resin further comprises a step (C) for adding condensation polymerization resin monomers to the reaction system of the step (A) at any time before, during or after the completion of the step (A) to subject the monomers to condensation polymerization. There is also provided a toner-binding resin having a styrene content of 100 ppm or less obtained by any of the above production methods. COPYRIGHT: (C)2006,JPO&NCIPI
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