| 摘要 |
PROBLEM TO BE SOLVED: To provide resin particles which are excellent in charging characteristics, heat-resistant storage stability, and thermal characteristics and have uniform particle diameters. SOLUTION: This core-shell type resin particle (D) composed of one or more filmy shell layers (P) formed from a resin (a) and one core layer (Q) comprising a resin (b) is characterized in that the weight ratio of (P) and (Q) is (0.1:99.9) to (70:30); (b) is a resin comprising a polyester resin (b1) and/or a resin (b2) containing (b1) as a constituting unit; and (b1) a polycondensed polyester resin formed in the presence of at least one titanium-containing catalyst (e) selected from the group consisting of a titanium halide (e1), a titanium diketoneenolate (e2), titanium carboxylate (e3), titanyl carboxylate (e4), titanyl carboxylate salt (e5), a titanium-containing compounds (e6), (e7) represented by the specified general formulas. COPYRIGHT: (C)2007,JPO&INPIT
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