Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2011-08-30
2011-08-30
Le, Hoa V (Department: 1721)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S109400, C430S110100, C430S110400, C430S107100, C430S108100
Reexamination Certificate
active
08007976
ABSTRACT:
A toner is provided that comprises a colorant and a binder resin, wherein the binder resin comprises a polyester resin that is prepared by a polycondensation reaction in the presence of at least a titanium-containing catalyst expressed by General Formula (II) or (II), the toner has a volume average particle diameter of 2.0 μm to 10.0 μm and a ratio Dv/Dn within a range of 1.00 to 1.40, in which Dv represents a volume average particle diameter and Dn represents a number average particle diameter,in-line-formulae description="In-line Formulae" end="lead"?Ti(—X)m(—OH)n General Formula (I)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?O═Ti(—X)p(—OR)q General Formula (II)in-line-formulae description="In-line Formulae" end="tail"?in General Formulas (I) and (II), X represents a residue of a mono-alkanolamine of 2 to 12 carbon atoms or a polyalkanolamine from which a hydrogen atom of one hydroxyl group is removed; other hydroxyl group(s) and still other hydroxyl group(s), within the polyalkanolamine molecule that has a directly bonding Ti atom, may polycondense to form a ring structure; other hydroxyl group(s) and still other hydroxyl group(s) may polycondense intermolecularly to form a repeating structure; and the polymerization degree is 2 to 5 in a case of forming the repeating structure; R represents one of a hydrogen atom and alkyl groups of 1 to 8 carbon atoms that may have 1 to 3 ether bonds; “m” is an integer of 1 to 4; “n” is an integer of 0 to 3; the sum of “m” and “n” is 4; “p” is an integer of 1 or 2; “q” is an integer of 0 or 1; the sum of “p” and “q” is 2; and in a case that “m” and “p” is 2 or more, the respective Xs may be identical or different each other.
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Fushimi Hiroyuki
Honda Takahiro
Shu Hyo
Sugiura Hideki
Tomita Masami
Le Hoa V
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh Company,. Ltd.
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