224 results about "High fatty acid" patented technology

The invention relates to the technical field of complex lithium-based lubricating grease, and discloses a wide-temperature high-extreme-pressure environment-friendly complex lithium-based lubricating grease composition which comprises the following components in percentage by mass: 80-90% of base oil, 10-15% of a thickening agent and 0-5% of an additive, the base oil is a mixture composed of IV-type base oil and polyalkyl cycloalkane, the compatibility between oil soap can be improved by adding the polyalkyl cycloalkane, and the stability of the composite lithium-based grease is improved; the thickening agent is composite lithium soap formed after saponification reaction of higher fatty acid, amino acid and lithium hydroxide, fatty dibasic acid commonly used in the prior art is replaced with the amino acid, and high extreme pressure anti-wear performance can be achieved by adding a very small amount or without adding a solid extreme pressure anti-wear agent or phosphorus, boron and other extreme pressure anti-wear agents; the additive is selected from one or more of a series of materials, and the series of materials comprise but are not limited to an extreme pressure anti-wear agent, an antioxidant and an anti-rust agent.

The invention provides a molecular marker related to sheep meat quality traits and fatty acid content and application thereof, and relates to the technical field of biologication.The application comprises the step that substances for detecting SNP sites are applied to preparation of products for predicting the sheep meat quality traits and the fatty acid content. The sheep with the specific genotype at the SNP site has high meat quality character or / and high fatty acid content, and the SNP molecular marker related to the meat quality character and the fatty acid content of the sheep can be used for predicting the meat quality character and the fatty acid content of the sheep, screening sheep individuals with the high meat quality character and the high fatty acid content, and improving the sheep breeding efficiency. The invention further discloses a breeding method for obtaining sheep with high meat quality characters and high fatty acid content, and the breeding speed of dominant sheep is increased.

The utility model discloses reaction equipment with high crude methyl ester yield, which comprises a stirring kettle and a material circulating system, the material circulating system comprises a circulating pump, a spray pipe arranged in the stirring kettle and a mixing nozzle arranged on the spray pipe, and a bottom outlet of the stirring kettle is connected with a feed port of the circulating pump through a first pipeline. An outlet of the circulating pump is connected with the spray pipe through a second pipeline; the mixing nozzle comprises a first sprayer and a second sprayer, and an outer flaring in the lower portion of the second sprayer is in clearance fit with the conical head through a connecting piece. The material circulating system can realize bottom-out and top-in of materials, so that the mixing of an oil phase and an enzyme water phase is promoted through the reciprocating circulation. In addition, the material circulating system is provided with a plurality of mixing nozzles, the flow speed of spraying of the first spray head is large, so that a negative pressure suction gap is formed at the joint of the second spray head and the first spray head, materials in the stirring kettle can enter the mixing nozzles under the action of negative pressure, an oil phase and an enzyme water phase are intensively mixed, and the yield of fatty acid methyl ester is improved.

The invention relates to the technical field of fatty acid zinc soap preparation, in particular to a method and equipment for preparing a fatty acid zinc soap mixture, the equipment comprises a shell and a heat conduction inner container, the heat conduction inner container is installed on the inner side wall of the shell, and a cavity is formed between the heat conduction inner container and the shell; the device further comprises a stirring device, a discharging device, a conveying device, a feeding pipe, a rotating shaft and a spiral blade, the feeding pipe is installed on the outer side wall of the shell, the output end of the feeding pipe communicates with the heat conduction inner container, the rotating shaft is rotationally installed on the stirring device, the spiral blade is installed on the outer side wall of the rotating shaft, and the stirring device is used for oppositely stirring a mixture in the heat conduction inner container. The stirring device is used for driving the rotating shaft to rotate, the discharging device is arranged at the bottom end of the shell in a communicating mode, and the discharging device is used for controlling discharging of materials in the shell; the mixing processing efficiency of raw materials is improved, the mixing uniformity of the fatty acid zinc soap is improved, the fatty acid zinc soap can be conveniently prepared and processed in the heat conduction inner container through different procedures, and the production efficiency is improved.

The invention relates to the technical field of microorganisms, in particular to animal combined lactobacillus LA-1, a microbial preparation and application of the animal combined lactobacillus LA-1 and the microbial preparation. Animal combined lactobacillus has been preserved in the China General Microbiological Culture Collection Center (CGMCC) on September 27, 2024, the preservation address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing, and the preservation number is CGMCC No.32098. The animal combined lactobacillus has the advantages that the animal combined lactobacillus LA-1 is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC No.32098, and the preservation number is CGMCC No.32098; animal combined lactobacillus LA-1 has the efficacy of remarkably reducing cholesterol content and bile salt hydrolase activity, can inhibit alpha-glucosidase activity, is high in fatty acid absorption rate, has safety, is sensitive to common antibiotics, can relieve obesity, reduce blood fat and liver lipid accumulation, relieve liver lipid degeneration and fat hypertrophy, and has the efficacy of reducing cholesterol content and bile salt hydrolase activity. The liver protection and liver function enhancement effects are achieved, and the good application prospect is achieved in the aspect of functional product preparation.

The invention discloses a method for in-situ determination of higher fatty acid in Baijiu, and belongs to the technical field of Baijiu detection. In order to realize in-situ simultaneous detection of a plurality of higher fatty acids in Baijiu, the invention provides a method for determining a plurality of higher fatty acids in Baijiu based on combination of ultra-high performance liquid chromatography and a quadrupole-electrostatic field orbitrap mass spectrometer, according to the method, liquid sample introduction is carried out directly or after membrane passing, and analysis is carried out through a high-resolution liquid mass spectrometer. And performing external standard method quantification after SIM mode scanning to obtain the content of the 14 higher fatty acids in the to-be-detected sample. According to the method, tedious pretreatment and derivatization processes are avoided, the 14 trace or trace higher fatty acids in the Baijiu can be accurately quantified at the same time, accurate verification can be achieved in Luzhou-flavor Baijiu, Fen-flavor Baijiu, Maotai-flavor Baijiu and rice-flavor Baijiu, the steps are simple, and operation is convenient.

The invention provides a preparation method and application of an ilmenite collecting agent, and the ilmenite collecting agent comprises, by mass concentration, 4%-12% of higher fatty acid, 15%-30% of a complexing agent, 5%-7.5% of sodium hydroxide, 1%-3% of a surfactant and 47.5%-75% of water. Wherein the higher fatty acid is modified oleic acid or a mixture of oleic acid and modified oleic acid; the modified oleic acid is 9-hydroxy octadecenoic acid or 10-hydroxy octadecenoic acid. The modified oleic acid is prepared from concentrated sulfuric acid, oleic acid and a sodium hydroxide solution. And the freezing point of the collecting agent is increased through the modified oleic acid, and the low-temperature resistance is improved. And when the pH is 2.5, the recovery rate of titanium dioxide reaches 60% or above after the collecting agent is added, and the acid resistance of the collecting agent is improved. The surfactant can stabilize foam, wet the mineral surface and reduce the mineral surface tension. The complexing agent can provide high selectivity and collecting capacity, and the technical problem that titanium concentrate and gangue minerals are difficult to efficiently separate through a conventional flotation reagent is solved. The preparation method is simple and easy for large-scale production.

The problem addressed by the present invention is to provide: soap composite particles that can both improve skin texture and sustain the functionality of the soap composite particles; a method for producing the soap composite particles; and a cosmetic containing the soap composite particles. These soap composite particles have core particles containing a saturated higher fatty acid salt and an inorganic oxide externally added to the core particles. In the core particles, the total content of Li2O, Na2O, Al2O3, MgO, CaO, ZnO, BaO, TiO2, SiO2, Fe3O4, Fe 2O3, and FeO is 0-15 mass%, and the core particles are spherical with a circularity of 0.80-1.00.

The invention relates to the field of cosmetic raw materials, and particularly discloses hydrophobic powder water dispersion slurry as well as a preparation method and application thereof. The hydrophobic powder water dispersion slurry comprises the following components in percentage by mass: 50-80% of inorganic toner, 5-20% of a dispersing agent, 0.1-5% of polyol, 0.1-2% of a preservative and the balance of water, the inorganic toner is subjected to surface modification treatment, and a modifier adopted in the surface modification treatment comprises one or a combination of two or more of amino acids, bionic sebum, a silicon-containing treating agent, higher fatty acid and salts thereof. The hydrophobic powder water dispersion slurry can be used in cosmetics such as colored face cream, tone-up cream, sun screen and lip glaze, and has the advantages of high storage stability, high solid content and narrow particle size distribution.

The present invention addresses the problem of providing: a method for producing an oily dispersion in which an inorganic oxide powder has excellent dispersibility without the need to previously subject the inorganic oxide powder to a surface treatment in order to improve the dispersibility in silicone oils; and a cosmetic containing this oily dispersion. This method is for producing an oily dispersion comprising the following components (A) to (C), and is characterized in that the production process therefore includes a step (1) in which the component (A) is slowly added to a mixture oil while heating the mixture oil at a temperature of 40-120°C, the mixture oil being one obtained by dissolving or dispersing the component (C) in the component (B), and a step (2) in which a dispersion obtained by adding the whole amount of the component (A) is further mixed at a temperature of 40-120°C. (A) An inorganic oxide powder having undergone no hydrophobization treatment, (B) a silicone oil, and (C) at least one compound selected from the group consisting of silicone compounds, organosilicon compounds, organic titanate compounds, and higher fatty acids.

The invention discloses a method for preparing a biological hydrocarbon compound by organic photocatalysis higher fatty acid decarboxylation, which comprises the following steps: adding higher fatty acid, a hydrogen atom transfer catalyst and an acridine photocatalyst / solid-phase acridine photocatalyst into a reaction solvent, stirring and reacting for 12-24 hours under the conditions of blue light irradiation and room temperature to obtain a reaction solution, filtering, washing and drying to obtain the biological hydrocarbon compound. And removing the reaction solvent of the obtained reaction solution under reduced pressure, and purifying by thin layer chromatography / column chromatography to obtain the long-chain alkane compound after decarboxylation of the higher fatty acid. The method is simple in step, mild in reaction condition and high in product yield, does not use any metal compound, and has the characteristics of high atom economy and environmental protection. And for unsaturated carboxylic acid, olefin configuration before and after decarboxylation is not influenced. When solid-phase acridine is used as a photocatalyst for reaction, the catalyst can be recycled through simple washing, filtering and recycling, excellent catalytic activity can still be kept after the catalyst is recycled for more than 10 times, and the reaction cost is further reduced.

The invention belongs to the technical field of food, and discloses a method, a system, equipment and a medium for analyzing interaction of turbid components in Baijiu based on an S curve, and the method comprises the following steps: respectively determining actually measured visual thresholds of a chemical substance A, a chemical substance B and a mixed chemical substance AB in the Baijiu by utilizing an S curve method; determining a theoretical threshold value of the mixed chemical substance AB based on an addition formula; and based on the ratio of the actually measured visual threshold value of the mixed chemical substance AB to the theoretical threshold value of the mixed chemical substance AB, analyzing the interaction between different chemical substances in the mixed chemical substance AB. According to the technical scheme provided by the invention, the mutual synergistic effect between the higher fatty acid ethyl esters can be intuitively reflected.

The invention belongs to the technical field of skin care, and discloses a moisturizing composition, application and a moisturizing anti-wrinkle cosmetic, the moisturizing composition comprises rosa damascena flower water, a tulip flower extract and a desert rose leaf cell extract, and the mass ratio of the rosa damascena flower water to the tulip flower extract to the desert rose leaf cell extract is (80-100): (0.01-2): (0.01-2). The rose damascene flower water with a small molecular structure is compounded with the tulip flower extract and the desert rose leaf cell extract, a large amount of the rose damascene flower water is used for driving moisturizing components and water in the desert rose leaf cell extract to permeate into skin, the water is supplemented to the skin, meanwhile, the strong water locking capacity is cooperatively exerted, and the moisturizing effect is achieved. In the process, the small molecular structure of the rosa damascena flower water is beneficial to permeation of higher fatty acid, polyglucoside and amino acid in the tulip flower extract, the effect of regulating skin metabolism in the moisturizing process is achieved, and the situation that long-acting moisture maintenance of skin cells is affected due to excessive swelling of the skin cells caused by excessive local moisturizing is avoided; in addition, the desert rose leaf cell extract and the melancholia flower extract can regulate the water-oil balance of the skin, and the desert rose leaf cell extract, the melancholia flower extract and the desert rose leaf cell extract can synergistically improve the moisturizing effect of the skin, so that both short-acting moisturizing and long-acting moisturizing have excellent moisturizing effects.

The invention relates to the technical field of concrete admixtures, and particularly discloses a waterproof dense setting accelerator and a preparation method and application thereof, the waterproof dense setting accelerator comprises the following components by weight: 5-10 parts of a suspending agent, 50-250 parts of modified silica sol, 100-250 parts of an organic complex waterproof agent, 400-600 parts of a setting accelerator, and water; wherein the modified silica sol is obtained by modifying acidic silica sol with a modifier, and the modifier is a silane coupling agent; wherein the organic complexing waterproofing agent is a higher fatty acid aluminum complex. After the waterproof dense setting accelerator is doped into concrete, a large amount of air entraining of the concrete cannot be caused, microcracks of sprayed concrete can be filled, the compactness of the concrete is further improved, meanwhile, a hydrophobic effect is formed in the sprayed concrete and on the surface of the sprayed concrete, and the addition of the organic complexing waterproof agent can promote the condensation of the concrete, so that the waterproof performance of the concrete is improved. And the concrete can be quickly coagulated by matching with a coagulant.

Microorganisms are genetically engineered to continuously produce fatty acids, fatty alcohols, cultured protein, or any combination thereof by microbial fermentation, particularly by microbial fermentation of a gaseous substrate. The microorganisms are C1-fixing. The production of fatty acids, fatty alcohols, and cultured proteins can be improved. This can be improved by varying promoters or nutrient limiting means.

The present application relates to the field of detergent, and discloses a high fatty acid content liquid detergent composition containing a dye fixing agent and a preparation method thereof.The liquid detergent composition comprises: 0.1-5% of the dye fixing agent, 1-15% of non-ionic surfactant, 1-15% of anionic surfactant, and water; wherein: the dye fixing agent is the reactant of amine and epichlorohydrin; the anionic surfactant contains 2-7% of fatty acid surfactant in all raw materials; and the weight ratio of the non-ionic surfactant to the anionic surfactant is at least 0.4:1.The present application optimizes the proportion and type of raw materials in the liquid detergent composition, so that the cationic dye fixing agent can still maintain good low-temperature stability in the high content anionic surfactant for a long time.In the above formula framework, the addition of the dye fixing agent can even improve the low-temperature stability of the system to a certain extent.

The invention provides an oil-in-water emulsified cosmetic containing (a) an aqueous medium,(b) two or more higher fatty acids of 12 to 24 carbon atoms and alkali metal salts thereof,(c) at least one compound selected from the group consisting of monoalkyl glyceryl ethers having an alkyl group of 12 to 24 carbon atoms and monoalkenyl glyceryl ethers having an alkenyl group of 12 to 24 carbon atoms,(d) a thickener comprising (d-1) a polysaccharide derived from a microorganism and (d-2) a (meth)acrylic-based polymer selected from the group consisting of a poly(meth)acrylic acid salt and a polymer including at least one selected from the group consisting of a (meth)acrylic acid ester, a (meth)acryloylalkyltaurine and a salt thereof as a structural unit, and(e) a nonionic surfactant.

The invention relates to the technical field of biomedicine, in particular to application of CCN1 in preparation of a medicine for enhancing ferroptosis sensitivity of tumor cells. According to the application disclosed by the invention, the correlation between the CCN1 and the ferroptosis sensitivity of the tumor cells is defined, the CCN1 moves downwards under the induction of ferroptosis and enters mitochondria to participate in fatty acid oxidative metabolism, and the tumor cells of the CCN1 with mitochondrial localization are higher in ferroptosis sensitivity; and the high fatty acid can promote the anti-cancer effect of ferroptosis induced by CCN1. The invention focuses on signal transduction of mitochondrial ROS and determines a novel ferroptosis sensitivity regulatory factor CCN1; the invention reveals that the sensitivity of tumor cells to ferroptosis can be enhanced by enabling CCN1 to shift into mitochondria to participate in fatty acid oxidative metabolism under ferroptosis induction, and clarifies a new signal channel, and the ferroptosis-based tumor treatment effect can be enhanced by targeting the channel.

The invention provides nylon 12 granules capable of stabilizing and controlling the pipe processing wall thickness and a preparation method and application of the nylon 12 granules. The nylon 12 granules comprise nylon 12 matrix granules and higher fatty acid metal salt wrapping the surfaces of the nylon 12 matrix granules. The higher fatty acid metal salt accounts for 0.03-0.5% of the total mass of the nylon 12 granules, and preferably 0.05-0.3% of the total mass of the nylon 12 granules. According to the invention, the surface of the nylon 12 granular material is uniformly coated with a certain content of higher fatty acid metal salt powder, so that a nylon 12 pipe product with stable and controllable pipe processing wall thickness can be obtained. The method has the characteristics of good pipe continuous extrusion stability, high wall thickness uniformity and high extrusion linear speed, and has the advantages of simple forming process, low equipment investment and the like.

The problem addressed by the present invention is solved by a liquid coloring composition containing a liquid dispersion medium (A), a surfactant (B), and a coloring agent (C), wherein the liquid dispersion medium (A) has a viscosity of 10,000 mPa·s or less at 25°C and a decomposition start temperature of 250°C or higher, the liquid dispersion medium (A) is at least one substance selected from the group consisting of aliphatic polyester resins, polyalkylene glycol resins, polyether ester resins, and aromatic polyvalent carboxylic acid esters, and the surfactant (B) is at least one substance selected from the group consisting of fatty acid esters, higher fatty acid metal salts, and fatty acid amides.

This invention belongs to the field of skin care technology and discloses a moisturizing composition, its uses, and a moisturizing and anti-wrinkle cosmetic. The moisturizing composition includes Rosa damascena flower water, tulip flower extract, and Rosa desertica leaf cell extract, wherein the mass ratio of Rosa damascena flower water, tulip flower extract, and Rosa desertica leaf cell extract is 80-100:0.01-2:0.01-2. This invention utilizes a combination of small-molecule Rosa damascena flower water, tulip flower extract, and Rosa desertica leaf cell extract. The abundant Rosa damascena flower water facilitates the penetration of the moisturizing and water-locking components in the Rosa desertica leaf cell extract into the skin, replenishing moisture while simultaneously providing powerful water-locking capabilities. Furthermore, the small-molecule structure of the Rosa damascena flower water promotes the penetration of higher fatty acids, polysaccharides, and amino acids from the tulip flower extract, regulating skin metabolism during hydration and preventing excessive localized hydration that could lead to over-swelling of skin cells and compromise long-term moisture retention. Combined with the skin-water-oil balance-regulating abilities of the Rosa desertica leaf cell extract and tulip flower extract, these three ingredients synergistically enhance skin hydration, providing excellent moisturizing effects for both short-term and long-term hydration.

The invention belongs to the technical field of manganese slag resource utilization, and particularly relates to a composite exciting agent, manganese slag fluid soil and a preparation method and application of the manganese slag fluid soil. The composite activator comprises mineral powder, lime, cement and a surface modifier. The surface modifier comprises higher phosphate and higher fatty acid salt. The mineral powder, the cement, the lime and the surfactant serve as the composite exciting agent, when the manganese slag is treated, the activity of the manganese slag can be activated, the manganese slag fluid soil with good compressive strength is formed, the manganese slag has the high mixing amount and accounts for 85-95.5% of the total mass of the mixed powder, the purpose of large-scale resource utilization of the manganese slag can be achieved, the environmental pressure is relieved, and the economic benefit is increased. And the method has good economical efficiency. Meanwhile, the surface modifier adopts a specific high-grade phosphate and high-grade fatty acid salt compounding mode, so that the friction force in a composite system can be effectively reduced, the flowability of the composite system is improved, the problem of limited material contact is solved, and the compressive strength is improved.

The invention relates to the field of drilling fluids, in particular to a shear-improving non-plasticization shear-improving agent for an oil-based drilling fluid, a preparation method of the shear-improving non-plasticization shear-improving agent and the oil-based drilling fluid. The shear-improving non-plasticizing viscous shear-improving agent for the oil-based drilling fluid provided by the invention is prepared by reacting amine and derivatives thereof, polyacid, alcohol ether compounds and unsaturated higher fatty acid ester according to a certain proportion and then diluting and dissolving with a solvent. The shear strength improving agent provided by the invention has the characteristics of good shear strength improving effect and no plasticizing viscosity, improves the rock carrying capacity of the oil-based drilling fluid, does not improve the plastic viscosity of the oil-based drilling fluid, improves the flow pattern of the oil-based drilling fluid, and effectively realizes the low-viscosity high-shear oil-based drilling fluid.

To provide a detergent composition that has good foaming properties and good foam quality and further can form foam with high adhesion to the skin.SOLUTION: A detergent composition of the present invention contains: component A: at least one selected from the group consisting of higher fatty acids and / or salts thereof, and amino acid surfactants; component B: Tremella fuciformis polysaccharide; component C: polyhydroxystearic acid; and component D: water, the content of the component B being 0.005 to 0.1 mass%, and the content of the component C being 0.1 to 5.0 mass%. Preferably, the detergent composition of the present invention contains component E: a cationic polymer. Preferably, the detergent composition of the present invention contains component F: an amphoteric surfactant. Preferably, the detergent composition of the present invention contains component G: a polyhydric alcohol.SELECTED DRAWING: None

A liquid crystal polyester resin composition includes resin pellets including a first liquid crystal polyester resin and a fibrous filler, a second liquid crystal polyester resin, and a metal salt of higher fatty acid, in which the second liquid crystal polyester resin has a lower flow starting temperature than the resin pellets, flow starting temperatures of the resin pellets and the second liquid crystal polyester resin are both 250° C. or higher, and a difference in the flow starting temperatures between the resin pellets and the second liquid crystal polyester resin is more than 10° C.

A grease composition containing a base oil and a calcium complex soap as a thickening agent, wherein C18-22 straight-chain substituted or unsubstituted higher fatty acid; substituted or unsubstituted aromatic monocarboxylic acid having a benzene ring; C2-4 straight-chain saturated lower fatty acid; and substituted or unsubstituted saturated dicarboxylic acid are used as carboxylic acids constituting the calcium complex soap.

The nitric oxide high-dispersity W / O emulsifiable paste is composed of an emulsifiable paste substrate, an emulsifier and a nitric oxide gas solution, the nitric oxide gas solution is uniformly dispersed in the emulsifiable paste substrate, and the volume ratio of the emulsifiable paste substrate to the emulsifier to the nitric oxide gas solution is 4: 1: 1-1: 1: 4. The emulsifiable paste substrate is composed of one or more of plant-derived vegetable oil or hydrogenated vegetable oil, saturated hydrocarbon, ester chemically synthesized or semi-synthesized by higher fatty acid and higher fatty alcohol and a mixture thereof; the emulsifier is composed of one or more of soap, higher fatty alcohol, polyol ester, fatty alcohol sulfate or sodium and polyoxyethylene ether derivatives, and the nitric oxide gas solution is formed by dispersing nitric oxide gas in a water-free and oxygen-free polyol solution which is in a liquid state at the temperature of 25 DEG C. The nitric oxide high-dispersity W / O cream overcomes the problems that nitric oxide molecules are poor in stability and prone to oxidation failure and the like, and is used for achieving the treatment effect of nitric oxide on body diseases, especially the treatment effect of nitric oxide on skin and mucosa inflammation.

The invention provides a method for preparing long-chain alkane through visible light catalytic decarboxylation of higher fatty acid, and belongs to the technical field of photocatalysis. According to the method, visible light is used for photocatalytic decarboxylation, the reaction process is simple, and hydrogen is not needed. In the reaction, alkane is used as a solvent, the reaction temperature can be controlled through the boiling point of the alkane in a self-made reflux reaction kettle in a normal-pressure environment, beta-Bi2O3 with a narrow forbidden bandwidth is selected as a catalyst, the catalyst is insoluble in the solvent and reactants, the separation is simple, convenient and rapid, and meanwhile, the environmental pollution is not caused. According to the reaction, the stearic acid can be efficiently and selectively converted into alkane with less one carbon atom, and a green production process is realized.

[Subject] To provide a thickener capable of imparting appropriate viscosity to a liquid cleaning agent containing an anionic surfactant such as N-acylmethyl taurine as a main basic component that is difficult to thicken. [Solution] A thickener for a cleaning agent, comprising: 40 to 80% by mass of a fatty acid ester (A) of polyoxyalkylene pentaerythritol represented by the following general formula (1), #imgabs0# (wherein R 1 ~R 4 Each independently represents a fatty acid residue having 11 to 23 carbon atoms, and AO represents an oxyalkylene group having 2 to 4 carbon atoms. In addition, p, q, r and s are integers satisfying the relationship of 20≤p+q+r+s≤300); 10 to 50% by mass of fatty acid alkanolamide (B); and 2 to 30% by mass of a higher fatty acid having 12 to 24 carbon atoms (C).

To provide a paper feeding roller exhibiting superior resistance to swelling with respect to both aromatic petroleum-based oils and higher fatty acid esters.SOLUTION: A paper feeding roller includes a shaft body and an elastic layer disposed around the shaft body, wherein the elastic layer is composed of a polyurethane rubber composition containing a polymer component and a curing agent component, the polymer component includes an ester-based polyurethane (A) and an ether-based polyurethane (B), a weight ratio of the ester-based polyurethane (A) to the ether-based polyurethane (B) is (A) / (B)=90 / 10-60 / 40, the durometer hardnesses of the ester-based polyurethane (A) and the ether-based polyurethane (B) are both 65°-95°, the curing agent component is an amine-based curing agent component (C), and the durometer hardness of the elastic layer is 75°-95°.SELECTED DRAWING: Figure 1