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148 results about "Salicylic acid derivatives" patented technology

Salicylic acid is the 2-hydroxy derivative of benzoic acid having the following structure: This formulation has been shown to provide gradual and prolonged release of the active ingredient into the skin.

Toner, and developer, image forming method, image forming apparatus and process cartridge using the toner

A toner is provided that contains: (A) a binder resin; (B) a colorant; (C) a charge controlling agent; and (D) an additive; wherein the binder resin (A) contains:
    • a polyester resin containing no tetrahydrofuran-insoluble component; and having a molecular weight distribution wherein components having a molecular weight not greater than 5×102 are present in an amount of 4% or less by weight, and wherein a main peak is present in a molecular weight range of from 3×103 to 9×103 when the molecular weight distribution is determined by gel permeation chromatography; wherein the charge controlling agent (C) contains: a metal salt of salicylic acid or salicylic acid derivative; and wherein the additive (D) contains: a hydrophobized silica having a primary particle diameter of from 0.01 to 0.03 μm; and
    • a hydrophobized titanium oxide having a primary particle diameter of from 0.01 to 0.03 μm and a specific surface area of from 60 to 140 m2/g, wherein the hydrophobized titanium oxide is prepared by surface-treating a particulate titanium oxide prepared by a wet process, wherein the hydrophobized titanium dioxide has one or more water-soluble components in an amount of 0.2% or more by weight, and has a transmittance not less than 35% for light having a wavelength of 300 nm and a transmittance not less than 80% for light having a wavelength of 600 nm; and its use in a developer, an image forming method, image forming apparatus and a process cartridge containing the toner.
Owner:RICOH KK

Method for the preparation of a polyester block copolymer, a polyester block copolymer composition and method for the preparation thereof

The present invention I relates to a method for the preparation of a polyester block copolymer (P1) characterized in that in the method for the preparation of 100% by weight of the polyester block copolymer (P1) by allowing to react A% by weight of a crystalline aromatic polyester with B% by weight of lactones (A+B=100), (B+0.5)% by weight of lactones are added into A% by weight of a crystalline aromatic polyester, and not less than 0.5% by weight of unreacted lactones are remained with respect to 100% by weight of the polyester block copolymer (P1) after reaction. The present invention II relates to a method for the preparation of a polyester block copolymer (P'1) having a high molecular weight characterized in that the polyester block copolymer (P1) is allowed to further react in a solid phase. The present invention III relates to a polyester block copolymer composition (R) obtained by thermally-processing a polyester block copolymer composition (Q) obtained by melt-mixing 100 parts by weight of a polyester block copolymer (P) with 0.1-5 parts by weight of an epoxy compound (C) having one or more epoxy groups under an inert gas atmosphere and not less than 120° C. in a solid phase, and further, at a temperature lower than a melting point of the polyester block copolymer composition (R). The present invention IV relates to a polyester block copolymer composition which comprises thermally-kneading 0.5-5.0 parts by weight of a mono or more functional epoxy compound (C) and 0.01-3.0 parts by weight of a complex-formable agent for a metal (G) such as an oxalic acid derivative and a salicylic acid derivative or a hydrazide derivative with 100 parts by weight of a polyester block copolymer (P1) obtained by a reaction of a crystalline aromatic polyester (A1) with lactones (B). The present invention V relates to a polyester block copolymer composition which comprises, in obtaining the polyester block copolymer composition by allowing to react the crystalline aromatic polyester (A1) with lactones (B), adding and thermally-kneading 0.5-5.0 parts by weight of an epoxy compound (C) having one or more pieces of epoxy groups (including at least 0.2 part by weight of two or more functional epoxy compound) and, optionally, 0-2.0 parts by weight of a carbodiimide compound (E) to 100 parts by weight of a polyester block copolymer (P3) obtained by allowing to react 0.1-100% by mol of at least one of a multifunctional compound (D) having at least three pieces of at least one kind of carboxylic group (i), hydroxyl group (ii), and / or an ester-formable group therefrom (iii) with 100% by mol of a crystalline aromatic polyester (A1). The present invention VI relates to a polyester block copolymer composition which comprises, in obtaining said polyester block copolymer composition by allowing to react the crystalline aromatic polyester (A1) with lactones (B), adding and thermally-kneading 0.1-5.0 parts by weight of an epoxy compound (C) having one or more pieces of epoxy groups and 0-2.0 parts by weight of a carbodiimide compound (E) to 100 parts by weight of a polyester block copolymer (P3) obtained by allowing to react 0.1-200% by mol of at least one of an aliphatic or aromatic multifunctional compound (D) having at least three pieces of carboxylic group hydroxyl group (ii), and / or an ester-formable group therefrom (iii) with 100% by mol of a crystalline aromatic polyester (A1). The present invention VII relates to a polyester block copolymer composition (R) which comprises, in obtaining the polyester block copolymer composition by allowing to react the crystalline aromatic polyester (A1) with lactones (B), heating a polyester block copolymer composition (Q) at a solid phase, and the composition (Q) is obtained by adding and thermally-kneading 0.1-5.0 parts by weight of at least one kind of an epoxy compound (C) having one or more pieces of epoxy groups to 100 parts by weight of a polyester block copolymer (P) obtained by allowing to react 0.1-200% by mol of at least one of a multifunctional compound (D)
Owner:WATANABE JUN

Toner, and developer, image forming method, image forming apparatus and process cartridge using the toner

A toner is provided that contains: (A) a binder resin; (B) a colorant; (C) a charge controlling agent; and (D) an additive; wherein the binder resin (A) contains: a polyester resin containing no tetrahydrofuran-insoluble component; and having a molecular weight distribution wherein components having a molecular weight not greater than 5×102 are present in an amount of 4% or less by weight, and wherein a main peak is present in a molecular weight range of from 3×103 to 9×103 when the molecular weight distribution is determined by gel permeation chromatography; wherein the charge controlling agent (C) contains: a metal salt of salicylic acid or salicylic acid derivative; and wherein the additive (D) contains: a hydrophobized silica having a primary particle diameter of from 0.01 to 0.03 μm; and a hydrophobized titanium oxide having a primary particle diameter of from 0.01 to 0.03 μm and a specific surface area of from 60 to 140 m2 / g, wherein the hydrophobized titanium oxide is prepared by surface-treating a particulate titanium oxide prepared by a wet process, wherein the hydrophobized titanium dioxide has one or more water-soluble components in an amount of 0.2% or more by weight, and has a transmittance not less than 35% for light having a wavelength of 300 nm and a transmittance not less than 80% for light having a wavelength of 600 nm; and its use in a developer, an image forming method, image forming apparatus and a process cartridge containing the toner.
Owner:FUSHIMI HIROYUKI +1

Preparation method of condensation type beaded salicylic acid derivative boron-specific chelating resin

The invention discloses a preparation method of condensation type beaded salicylic acid derivative boron-specific chelating resin. The boron-specific chelating resin has two hydroxyl groups on a benzene ring and is a vinyl acetate monomer (DPFSphere) prepared by taking 2,4-dihydroxy-benzoic acid as a functional monomer, taking phenol as a cross-linking agent, taking concentrated hydrochloric acid (AR) as a catalyst and taking glycol or ethylene glycol monomethyl ether as a pore-foaming agent through a reversed phase suspension polycondensation method. The preparation method has the advantages that the particle size of the boron-specific chelating resin is 0.1-1.0mm; boron is absorbed from a boron-contained water solution by using the beaded resin, and the maximum absorption capacity of the boron-specific chelating resin in the boron-contained water solution is 1.2-1.4mmol / g; the boron-contained water solution is adjusted to a neutral or alkaline solution with a pH value of 8-10, which is beneficial to the absorption of boron; the absorption of boron cannot be influenced when the concentrations of alkali metal and alkali metal ions are 0.01-0.2mmol / L; and the preparation method is simple in process and easy to implement and is beneficial to large-scale popularization and application.
Owner:NANKAI UNIV

Method for adsorbing and removing aluminum from rare earth material liquor through complexing-ion exchange synergistic effect

The invention discloses a method for adsorbing and removing aluminum from rare earth material liquor through a complexing-ion exchange synergistic effect. Salicylic acid derivative is utilized as an organic ligand to treat a rare earth solution, then D290 type anion exchange resin is utilized to adsorb complexing anion generated by reaction between aluminum ions and the organic ligand, and aluminum ions can be removed from the material liquor. By means of controlling the organic ligand use amount, a reaction temperature, a solution pH value, the rare earth material liquor and a resin column flow velocity, a removal rate of aluminum ions in the rare earth material liquor can reach 70% or more, and rare earth loss does not exceed 5%. Compared with the prior art, the method for adsorbing andremoving aluminum from rare earth material liquor through the complexing-ion exchange synergistic effect has a low equipment requirement and simpleness in operation, and a lot of factory areas required by multilevel extraction of an extraction method are avoided; meanwhile, the problems that aluminum hydroxide flocculent precipitate is difficult to filter and has seriousness in entrainment; furthermore, the used D290 type anion exchange resin can be recycled, and production cost is reduced.
Owner:JIANGXI UNIV OF SCI & TECH
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