Abstract: A catalyst for preparing condensation polymerization resin for a toner comprising at least one compound selected from the group consisting of a titanium compound represented by the formula (I): Ti(X)n(Y)m (I), wherein X is a substituted amino group having a total number of carbon atoms of from 1 to 28; Y is an alkoxy group, alkenyloxy group or acyloxy group, each having a total number of carbon atoms of from 1 to 28; and each of n and m is an integer of from 1 to 3, wherein a sum of n and m is 4; and a titanium compound represented by the formula (II): Ti(Z)4 (II), wherein Z is an alkoxy group, alkenyloxy group or acyloxy group, each having a total number of carbon atoms of from 8 to 28, wherein the four kinds of Z may be identical or different from each other; and a condensation polymerization resin composition comprising a condensation polymerization resin and the above catalyst.

Abstract: The present invention relates to a process for preparing a resin binder for toner, comprising the steps of (A) carrying out an addition polymerization reaction of addition polymerization resin monomers including styrene in the presence or absence of an organic solvent; and (B) mixing the resulting reaction mixture from the step (A) with water at a rate of 0.002 to 0.5 parts by weight based on 100 parts by weight of the addition polymerization resin monomers per minute at a temperature of 100° to 300° C. during and/or after the step (A), wherein the amount of water to be mixed in the step (B) is 0.1 to 50 parts by weight based on 100 parts by weight of the addition polymerization resin monomers. The resin binder for a toner obtained according to the present invention can be used, for instance, for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like, and a toner containing the resin binder.

Abstract: The present invention relates to a crystalline polyester for toner, obtained by polycondensation of an alcohol component comprising 70% by mol or more of 1,6-hexanediol, and a carboxylic acid component comprising 70% by mol or more of an aromatic carboxylic acid compound. The crystalline polyester for toner of the present invention is used as a resin binder for a toner used, for instance, for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.

Abstract: The present invention relates to a resin binder for toner, containing a crystalline polyester having a softening point of 80° to 130° C., containing a resin obtained by polycondensation of an alcohol component comprising 70% by mol or more of an aliphatic diol having 2 to 8 carbon atoms, and a carboxylic acid component comprising 70% by mol or more of an aromatic dicarboxylic acid compound; and an amorphous polyester-based resin containing a resin containing a polyester component obtained by polycondensation of an alcohol component comprising 70% by mol or more of an alkylene oxide adduct of bisphenol A, represented by the formula (I): wherein R is an alkylene group having 2 or 3 carbon atoms; x and y are a positive number; and the sum of x and y is from 1 to 16, and a carboxylic acid component, wherein the weight ratio of the crystalline polyester to the amorphous polyester-based resin is from 5/95 to 50/50.

Abstract: A catalyst for preparing a polyester for a toner, comprising an inorganic tin(II) compound; a polyester resin composition comprising a polyester and the catalyst; and a toner comprising the polyester resin composition. The catalyst for preparing a polyester is suitably used for a toner which is used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.

Abstract: A toner for electrophotography, containing a low-softening point polyester-based resin having a softening point of from 80° to 120° C.; and a high-softening point polyester-based resin having a softening point of higher than 120° C. and 160° C. or lower, wherein the low-softening point polyester-based resin has a viscosity at 160° C. of from 500 to 10000 Pa·s, and a ratio of viscosity at 140° C. to viscosity at 180° C. is 10 or less, and wherein a weight ratio of the low-softening point polyester-based resin to the high-softening point polyester-based resin is from 20/80 to 90/10. The toner for electrophotography of the present invention is used for, for instance, developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.

Abstract: A toner for electrophotography comprising a resin binder comprising a crystalline polyester and an amorphous resin, wherein said crystalline polyester is dispersed in the resin binder in an amount of from 1 to 40% by weight, and wherein 90% or more of a dispersed domain of said crystalline polyester has a diameter of from 0.1 to 2 ?m. The toner for electrophotography can be suitably used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like.

Abstract: A toner comprising a resin binder comprising a crystalline resin; a colorant; and fine inorganic particles, the fine inorganic particles being externally added thereto, wherein a coating ratio of the fine inorganic particles on a surface of the toner is 130 to 300%. The toner can be suitably used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method and the like.

Abstract: A crystalline polyester prepared by polycondensing an alcohol component comprising 1,6-hexanediol in an amount of 60% by mol or more, with a carboxylic acid component comprising fumaric acid in an amount of 60% by mol or more, wherein the crystalline polyester has a ratio of a softening point to the maximum peak temperature of heat of fusion is from 0.6 to 1.3, and wherein a tetrahydrofuran-soluble component of the crystalline polyester has a number-average molecular weight of from 1500 to 10000, and the crystalline polyester has a softening point of from 50° to 120° C.; a resin binder for a toner comprising the crystalline polyester; and a toner comprising the resin binder. The crystalline polyester can be used as a resin binder for a toner used, for example, for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.

Abstract: A polyester resin composition for a toner comprising a titanium compound in an amount of from 0.005 to 4% by weight, and an inorganic phosphorus compound in an amount of from 0.001 to 5% by weight; a toner comprising the polyester resin composition as defined above; and a process for preparing the polyester resin composition for a toner as defined above, comprising the step of polycondensing the raw material monomers for the polyester in the presence of a titanium compound and an inorganic phosphorus compound. The polyester resin composition for a toner is suitably used as a resin binder for a toner for developing a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method or the like, a process for preparing the same, and a toner comprising the polyester resin composition.

Abstract: A crystalline polyester obtained by polycondensing monomers comprising 0.1 to 10% by mol of a divalent aromatic compound, wherein the crystalline polyester has a softening point of 85° to 150° C. The crystalline polyester can be suitably used for a resin binder for toner for electrophotography and the like used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like; a polyester resin composition comprising the crystalline polyester.

Abstract: A crystalline polyester having a number-average molecular weight of from 5000 to 10000, a weight-average molecular weight of from 150000 to 8000000, a maximum peak temperature of heat of fusion of from 60° to 150° C., and a ratio of a softening point to a maximum peak temperature of heat of fusion (softening point/peak temperature) of from 0.6 to 1.3. The crystalline polyester can be used as a resin binder for a toner used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.

Abstract: A resin binder for a toner comprising a crystalline polyester having a ratio of a softening point to a maximum peak temperature of heat of fusion (softening point/peak temperature) of from 0.6 to 1.3, wherein the crystalline polyester is prepared by polycondensing a monomer mixture comprising 0.1 to 10% by mol of at least one monovalent aliphatic compound selected from the group consisting of a monovalent aliphatic carboxylic acid compound having 10 to 24 carbon atoms and a monovalent aliphatic alcohol having 10 to 24 carbon atoms; a toner comprising a resin composition comprising the resin binder as defined in above; and a method for fixing a toner, wherein the toner as defined in above is applied to a heat-and-pressure fixing method. The toner comprising the above resin binder is used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing and the like.

Abstract: A catalyst for preparing condensation polymerization resin for a toner comprising at least one compound selected from the group consisting of a titanium compound represented by the formula (I): Ti(X)n(Y)m (I), wherein X is a substituted amino group having a total number of carbon atoms of from 1 to 28; Y is an alkoxy group, alkenyloxy group or acyloxy group, each having a total number of carbon atoms of from 1 to 28; and each of n and m is an integer of from 1 to 3, wherein a sum of n and m is 4; and a titanium compound represented by the formula (II): Ti(Z)4 (II), wherein Z is an alkoxy group, alkenyloxy group or acyloxy group, each having a total number of carbon atoms of from 8 to 28, wherein the four kinds of Z may be identical or different from each other; and a condensation polymerization resin composition comprising a condensation polymerization resin and the above catalyst.

Abstract: A toner comprising a resin binder comprising a crystalline resin; a colorant; and fine inorganic particles, the fine inorganic particles being externally added thereto, wherein a coating ratio of the fine inorganic particles on a surface of the toner is 130 to 300%. The toner can be suitably used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method and the like.

Abstract: A catalyst for preparing a polyester for a toner, comprising an inorganic tin(II) compound; a polyester resin composition comprising a polyester and the catalyst; and a toner comprising the polyester resin composition. The catalyst for preparing a polyester is suitably used for a toner which is used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.

Abstract: A signal transfer apparatus of high S/N ratio and high read speed suitable for use in photoelectric conversion circuit units with a large pixel count and an imaging apparatus and radiation image pick-up system. The signal transfer apparatus, comprises a plurality of terminals connected to a plurality of signal sources, and a read circuit unit for converting signals received from the terminals into series signals and outputting the resulting series signals. The read circuit unit comprises first operational amplifiers connected to the terminals, and second operational amplifiers for receiving outputs of the first operational amplifiers. And each of the first operational amplifiers comprises an inverting input terminal connected to each of the terminals, an output terminal with an integral capacitor and switch being connected in parallel between it and the inverting input terminal, and a non-inverting input terminal supplied with a reference voltage.

Abstract: A toner for electrophotography comprising a resin binder comprising a crystalline polyester and an amorphous resin, wherein said crystalline polyester is dispersed in the resin binder in an amount of from 1 to 40% by weight, and wherein 90% or more of a dispersed domain of said crystalline polyester has a diameter of from 0.1 to 2 &mgr;m. The toner for electrophotography can be suitably used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like.

Abstract: A crystalline polyester obtained by polycondensing monomers comprising 0.1 to 10% by mol of a divalent aromatic compound, wherein the crystalline polyester has a softening point of 85° to 150° C. The crystalline polyester can be suitably used for a resin binder for toner for electrophotography and the like used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like; a polyester resin composition comprising the crystalline polyester.

Abstract: A signal transfer apparatus of high S/N ratio and high read speed suitable for use in photoelectric conversion circuit units with a large pixel count and an imaging apparatus and radiation image pick-up system.