Abstract: A polyester resin has excellent adhesiveness and excellent grindability. The polyester resin includes a constitutional unit A derived from a carboxylic acid having a cyclic structure and containing 5 or more carboxyl groups, a constitutional unit derived from a dicarboxylic acid, and a constitutional unit derived from a polyhydric alcohol. The constitutional unit A has a content of 0.01 parts by mole or more and 45 parts by mole or less with respect to 100 parts by mole of the constitutional unit derived from a dicarboxylic acid. The hydroxyl value of the polyester resin is 6 mgKOH/g or more and 27 mgKOH/g or less.

Abstract: The polyester resin of the present invention is a polyester resin obtained by using polyethylene terephthalate, a polyvalent carboxylic acid component, and a polyhydric alcohol component, wherein the polyester resin comprises 1 molar part or more in total of at least one type of structural unit selected from the group consisting of a structural unit derived from a tri- or higher valent carboxylic acid and a structural unit derived from a tri- or higher hydric alcohol, with respect to 100 molar parts of structural units derived from an acid component, and wherein a heat absorption is 0.1 to 10 J/g as measured with respect to the polyester resin heat-treated at 150° C. for 30 minutes.

Abstract: A polyester resin having low-temperature (80-240° C.) fluidity, storage stability, and achieving both dispersibility and grindability, where the polyester resin includes, in reacted form: a polyhydric alcohol; a polycarboxylic acid; a sulfonate component, which is a bis(2-hydroxyethyl)isophthalate sulfonic acid salt; and a hetero alicyclic skeleton, which can be a monomer of formula (1) and/or formula (2): where X is O, S, or NH and R1 to R4 are functional groups. Also, a method for producing the polyester resin by polymerizing a mixture containing the polyhydric alcohol, the polycarboxylic acid, the sulfonate component and the hetero alicyclic skeleton component having formula (1) and/or (2).

Abstract: Provided is a polyester resin having excellent adhesiveness and excellent grindability. One aspect of the polyester resin of the present invention is a polyester resin including a constitutional unit A derived from a carboxylic acid having a cyclic structure and containing 5 or more carboxyl groups and a constitutional unit derived from a dicarboxylic acid, in which the constitutional unit A has a content of 0.01 parts by mole or more and 45 parts by mole or less with respect to 100 parts by mole of the constitutional unit derived from a dicarboxylic acid.

Abstract: A polyester resin including: structural unit (A) represented by a specific formula; structural unit (B) derived from an aliphatic diol having 3 to 8 carbon atoms (provided that the structural unit (A) is excluded); and at least one structural unit (C) selected from the group consisting of structural unit (c1) derived from a trivalent or higher-valent acid component and structural unit (c2) derived from a trihydric or higher-hydric alcohol component, the polyester resin including the structural unit (B) in an amount of 20 molar parts or more with respect to 100 molar parts of all the structural units derived from acid components.

Abstract: There are provided a polyester resin for toner which has a sufficiently low TVOC, can be produced with high productivity, and can produce toner having excellent durability; and toner containing the polyester resin for toner. The polyester resin for toner has a TVOC of 380 ppm or less and includes a component derived from ethylene glycol, a hydrocarbon group having 12 carbon atoms or more, and a titanium element.

Abstract: Provided is a method of producing a lipid, the method comprising the steps of: introducing a gene encoding an acyl-ACP thioesterase into a host, and thereby obtaining a transformant, and culturing the transformant, to produce the lipid.

Abstract: The invention relates to a polyester resin for toner to be used in the development of an electrostatic image or magnetic latent image in electrophotography, electrostatic recording, electrostatic printing, or the like, a method for producing a polyester resin for toner, and a toner, and an object of the invention is to provide, with excellent productivity and stability, a polyester resin for toner having excellent storage stability, hot offset resistance, and low temperature fixing property as toner while still considering the environmental protection and safety. A polyester resin for toner contains 40 mol % or more and 60 mol % or less of structural units derived from tri- or higher hydric carboxylic acids based on 100 mol % of structural units derived from all acid components, and has a metal content of 100 ppm or less.

Abstract: There are provided a polyester resin for toner which has a sufficiently low TVOC, can be produced with high productivity, and can produce toner having excellent durability; and toner containing the polyester resin for toner. The polyester resin for toner has a TVOC of 380 ppm or less and includes a component derived from ethylene glycol, a hydrocarbon group having 12 carbon atoms or more, and a titanium element.

Abstract: Disclosed herein is a master batch for toners, said master batch containing an acrylic polymer (A) and a polyester resin (B1) in a specific mass ratio. A toner disclosed herein contains the master batch and a polyester resin (B2), and has a content of the acrylic polymer (A) of 5% by mass or less. Methods for producing a master batch for toners are also disclosed herein and include a step of mixing an acrylic polymer (A) and a polyester resin (B1) in a specific mass ratio. Methods for producing a toner are also disclosed herein and include a step of mixing the master batch and a polyester resin (B2) so that a content of the acrylic polymer (A) is at a specific amount.

Abstract: A binder resin for toner of the present invention comprising: a polyester resin (A) which contains a constitutional unit derived from isosorbide and has a softening temperature of higher than 120° C.; and a polyester resin (B) different from the polyester resin (A), wherein the binder resin for toner has a pulverizability index of 25 or more.

Abstract: A binder resin for toner of the present invention comprising: a polyester resin (A) which contains a constitutional unit derived from isosorbide and has a softening temperature of 120° C. or lower; and a polyester resin (B) different from the polyester resin (A), wherein the binder resin for toner has a hygroscopicity index of 2 or less and contains a tetrahydrofuran-insoluble matter at 5% by mass or less.

Abstract: The invention relates to a polyester resin for toner to be used in the development of an electrostatic image or magnetic latent image in electrophotography, electrostatic recording, electrostatic printing, or the like, a method for producing a polyester resin for toner, and a toner, and an object of the invention is to provide, with excellent productivity and stability, a polyester resin for toner having excellent storage stability, hot offset resistance, and low temperature fixing property as toner while still considering the environmental protection and safety. A polyester resin for toner contains 40 mol % or more and 60 mol % or less of structural units derived from tri- or higher hydric carboxylic acids based on 100 mol % of structural units derived from all acid components, and has a metal content of 100 ppm or less.

Abstract: A master batch for toners according to the present invention contains an acrylic polymer (A) and a polyester resin (B1) at a specific mass ratio. A toner according to the present invention contains the master batch for toners and a polyester resin (B2), and has a content of the acrylic polymer (A) of 5% by mass or less. A method for producing a master batch for toners according to the present invention comprises a step wherein an acrylic polymer (A) and a polyester resin (B1) are mixed at a specific mass ratio. A method for producing a toner according to the present invention comprises a step wherein the master batch for toners and a polyester resin (B2) are mixed so that the content of the acrylic polymer (A) is at a specific amount.

Abstract: A binder resin for toner of the present invention comprising: a polyester resin (A) which contains a constitutional unit derived from isosorbide and has a softening temperature of higher than 120° C.; and a polyester resin (B) different from the polyester resin (A), wherein the binder resin for toner has a pulverizability index of 25 or more.

Abstract: A binder resin for toner of the present invention comprising: a polyester resin (A) which contains a constitutional unit derived from isosorbide and has a softening temperature of 120° C. or lower; and a polyester resin (B) different from the polyester resin (A), wherein the binder resin for toner has a hygroscopicity index of 2 or less and contains a tetrahydrofuran-insoluble matter at 5% by mass or less.

Abstract: To provide a crosslinked polyester resin by using environmentally friendly and low-cost raw materials while reducing the content of a bisphenol A-derived component. [Subject Matter] [Solutions] To provide a polyester resin containing a trivalent or higher acid-derived component and a bisphenol A-alkylene oxide adduct-derived component. In such a polyester resin, the bisphenol A-alkylene oxide adduct-derived component is contained at 0.01˜0.35 mol relative to 1 mol of all the acid-derived components, and the ratio of acid value (mg KOH/g) to hydroxyl value (mg KOH/g) is set to be 1:3˜1:26.

Abstract: Provided is a polyester resin having excellent low-temperature fluidity and storage stability that achieves both dispersibility and grindability. A polyester resin including a sulfonate component and a hetero alicyclic skeleton component as constituent units.

Abstract: The present invention relates to a polyester resin which comprises a constituent unit represented by general formula (1), a constituent unit derived from a compound having a bisphenol skeleton and a constituent unit derived from a polyvalent carboxylic acid, and wherein the constituent unit derived from a compound having a bisphenol skeleton is contained in an amount of 20 parts by mole or more per 100 parts by mole of the constituent unit derived from a polyvalent carboxylic acid. The present invention is able to provide a polyester resin which has excellent solubility in a solvent and excellent pulverization properties, and which provides a toner having excellent storage stability.

Abstract: To provide a crosslinked polyester resin by using environmentally friendly and low-cost raw materials while reducing the content of a bisphenol A-derived component. [Subject Matter] [Solutions] To provide a polyester resin containing a trivalent or higher acid-derived component and a bisphenol A-alkylene oxide adduct-derived component. In such a polyester resin, the bisphenol A-alkylene oxide adduct-derived component is contained at 0.01˜0.35 mol relative to 1 mol of all the acid-derived components, and the ratio of acid value (mg KOH/g) to hydroxyl value (mg KOH/g) is set to be 1:3˜1:26.