Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2005-06-24
2009-12-29
Seidleck, James (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C430S108500, C430S126200, C528S271000, C528S288000, C528S290000, C528S294000, C528S295000, C528S305000, C528S308000, C528S301000
Reexamination Certificate
active
07638590
ABSTRACT:
The invention provides a novel polyester adapted for use in a charge control agent for a toner for an electrophotographic process, having a charge stability, a high charge amount, an improved dispersibility and a biodegradability, and a producing method and an application technology therefore. According to the invention, there is provided polyhydroxyalkanoate comprising at least one unit represented by the following chemical formula in a molecule:in-line-formulae description="In-line Formulae" end="lead"?—(O—CH(—(CH2)m—CH2-p-C6H4—CONH-A1SO2R1)CH2CO)—in-line-formulae description="In-line Formulae" end="tail"?(wherein R1represents OH, a halogen atom, ONa, OK or OR1a; A1and R1aeach represents a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic cyclic structure or a substituted or unsubstituted heterocyclic structure; m represents an integer selected from a range of 0 to 7; and R1, A1, R1aand m have the aforementioned meanings independently for each unit when plural units are present), a charge control agent containing such polyhydroxyalkanoate, a toner utilizing such charge control agent, and an image forming method and an image forming apparatus utilizing such toner.
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Fukui Tatsuki
Honma Tsutomu
Kenmoku Takashi
Kozaki Shinya
Kusakari Ako
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Listvoyb Gregory
Seidleck James
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