| US 7,585,921 B2 | ||
| Resin for toner binder and toner composition | ||
| Hiroshi Kishiki, Kyoto (Japan); Naoki Takase, Kyoto (Japan); Syuji Yamada, Kyoto (Japan); and Tatsuyoshi Ishii, Kyoto (Japan) | ||
| Assigned to Sanyo Chemical Industries, Ltd., Kyoto-Shi (Japan) | ||
| Appl. No. 10/498,488 PCT Filed Dec. 16, 2002, PCT No. PCT/JP02/13135 § 371(c)(1), (2), (4) Date Nov. 12, 2004, PCT Pub. No. WO03/052521, PCT Pub. Date Jun. 26, 2003. |
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| Claims priority of application No. 2001-382390 (JP), filed on Dec. 14, 2001; and application No. 2002-146572 (JP), filed on May 21, 2002. | ||
| Prior Publication US 2005/0064313 A1, Mar. 24, 2005 | ||
| Int. Cl. C03G 9/00 (2006.01); C08L 67/00 (2006.01) | ||
| U.S. Cl. 525—432 [430/109.4; 528/272] | 21 Claims |
| 1. A resin for toner binders,
which comprises a blend of polyester resins (A) and (B), wherein transesterification between the resins is prevented and wherein
the weight ratio between (A) and (B) is 70:30 to 20:80,
said resin (A) being a crosslinked modified polyester resin consisting of the reaction product from a crosslinked polyester
resin (a) and a polyepoxide (c) and
said resin (B) being an acid anhydride-modified linear polyester resin consisting of the reaction product from a linear polyester
resin (b) and an acid anhydride (r).
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