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110 results about "Polyoxyethylene alkyl ether" patented technology

Polyoxyethylene alkyl ethers, CnEm, are nonionic surfactants made of an alkyl chain with n methylene groups and a hydrophilic part with m oxyethylene units. CnEm nonionic surfactants are very useful in chemical analysis. The commercially available products are often a mixture of several CnEm molecules with different m values.

Image recording method

Provided is an image recording method including an image recording step of sequentially applying a first ink and a second ink onto a recording medium transported at a transportation speed of 40 m / min or greater and 300 m / min or less and heating and drying the inks, in which in a case where a difference in landing time between the first ink and the second ink is defined as T1 seconds and a time from a time point at which a last liquid droplet of the second ink lands to a time point at which the liquid droplet is heated and dried is defined as T2 seconds, T1 is 0.020 or longer and 1.2 or shorter, and T2 is 2.0 or shorter, each of the first ink and the second ink contains water, an organic solvent, a surfactant, and wax particles, the organic solvent includes a solvent species A represented by Formula (1) or Formula (2) and having a ClogP value of -0.60 or greater and 2.70 or less, and the surfactant includes an acetylene-based surfactant (A), a polyoxyethylene alkyl ether-based surfactant (B), and a polyether-modified silicone-based surfactant (C).
Owner:FUJIFILM CORP

Waste gas absorption liquid for treating large-air-volume low-concentration waste gas through water-based method

The invention relates to the technical field of waste gas treatment, and particularly discloses waste gas treatment liquid for treating large-air-volume low-concentration waste gas through a water-based method. The waste gas treatment liquid for treating the large-air-volume low-concentration waste gas through the water-based method comprises a surfactant, a defoaming agent, a dissolution accelerant and water. Wherein the surfactant can be selected from any one or more of polyoxyethylene alkyl ether, polyoxyethylene alkyl ether and polyoxyethylene fatty acid ester; the dissolution accelerant can be selected from any one or more of ethylene glycol monobutyl ether, diethylene glycol monobutyl ether and triethylene glycol monobutyl ether; the defoaming agent is any one or more of butanol, dimethyl silicone oil, silicone and polyether modified polysiloxane. When the waste gas absorption liquid obtained in the invention is used for treating waste gas, the absorption efficiency of methanol, butanol, benzene, toluene, xylene, ethyl acetate, dichloromethane and acetone is obviously improved, and the absorption efficiency of the waste gas absorption liquid on aromatic hydrocarbon, halogenated hydrocarbon, alcohol, ketone and ester pollutants is improved.
Owner:XIAMEN ADIT ENVIRONMENTAL PROTECTION TECH CO LTD

Ink composition for aqueous inkjet and printed matter

This ink composition for an aqueous inkjet contains a pigment, an anionic group-containing resin, a resin emulsion, a surfactant, a water-soluble solvent, and water, and the water-soluble solvent contains 90 mass% or more of a water-soluble solvent having a boiling point of 200 DEG C or less at 1 atmospheric pressure. The surfactant contains a polyoxyethylene alkyl ether having an HLB value of from 7 to 12 (inclusive) and a polysiloxane-based surfactant satisfying specific conditions. The ink composition for an aqueous ink jet has excellent discharge stability, good filling of a full plate portion without irregularities even when printing and recording are performed on a non-absorbent printing medium, and excellent paper surface dryness.
Owner:SAKATA INX

Hair cosmetic

To provide a hair cosmetic that delivers a favorable melting feel in the palm, offers natural hair cohesion and gloss, and ensures easy rinsing and high stability at 50°C.SOLUTION: A hair cosmetic contains: (A) wax; (B) ester oil that is liquid at 25°C; (C) PEG-20 glyceryl triisostearate; and (D) polyoxyethylene alkyl ether. Therein: a content of the component (A) is 1-12 mass%; a content of the component (B) is 20-70 mass%; a content of the component (C) is 0.5-7 mass%; and a content of the component (D) is 1-10 mass%. This achieves a hair cosmetic that delivers a favorable melting feel in a palm, offers natural hair cohesion and gloss, and ensures easy rinsing and high stability at 50°C.SELECTED DRAWING: None
Owner:DARIYA

Soluble microneedle containing cannabidiol suspension and preparation method therefor

To provide a nanonization method for cannabidiol, a nanosized cannabidiol suspension prepared by the same, and applications therefor.SOLUTION: A nanonization method for cannabidiol includes following steps: the cannabidiol is dissolved in a good solvent to obtain a cannabidiol-good solvent solution; and the cannabidiol-good solvent solution is added to an aqueous solution of a stabilizer, followed by ultrasonic treatment and then rotary evaporation to remove the good solvent, resulting in a nanosized cannabidiol suspension. The stabilizer includes one or more selected from the group consisting of poloxamer, polysorbate, polyoxyethylene alkyl ether, polyvinyl pyrrolidone, hydroxypropyl methyl cellulose and chitosan. Nanonization technology for poorly soluble drugs reduces the particle size of the cannabidiol to produce the nanosized cannabidiol suspension. In the nanosized cannabidiol suspension, nanosized cannabidiol has a high solid content. The method achieves the solubilization of the cannabidiol.SELECTED DRAWING: Figure 1
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1

Self-assembled surfactant as well as preparation and application thereof

The invention provides a self-assembled surfactant as well as preparation and application thereof. The preparation method comprises the following steps: adding an anionic surfactant and a nonionic surfactant into a buffer solution, uniformly mixing, and heating until the anionic surfactant and the nonionic surfactant are completely molten, so as to obtain the self-assembled surfactant. Wherein the anionic surfactant is one or more of lignosulfonate, secondary alkyl sulfonate and alpha-olefin sulfonate; the nonionic surfactant is one or more of polyethylene glycol, fatty alcohol-polyoxyethylene ether, polyoxyethylene alkyl ether and polyoxyethylene nonyl phenyl ether. The specific anionic surfactant and the nonionic surfactant are compounded, self-assembly is completed through heating, and the obtained self-assembly surfactant can remarkably improve the enzymolysis efficiency of lignocellulose.
Owner:SOUTH CHINA AGRICULTURAL UNIVERSITY

Hair treatment agent composition and hair treatment agent

To provide a hair treatment agent composition (second agent) that can suppress irritating smell in a mixture obtained by being mixed with a first agent.SOLUTION: A hair treatment agent composition of the present invention is a second agent which is used for a multi-agent type hair color remover, a hair dye remover or an oxidative hair dye including at least a first agent and the second agent, which is used by being mixed with the first agent containing alkali agent, wherein the hair treatment agent contains polyoxyethylene alkyl ether (component A1) having an HLB value of 12 or more and a carbon number of alkyl group of 12 or more and 16 or less, polyoxyethylene alkyl ether (component A2) having an HLB value of 12 or more and a carbon number of alkyl group of 18 or more, nonionic surfactant (component A3) having an HLB value of 7 or more and 10 or less, and hydrogen peroxide (component B).SELECTED DRAWING: None
Owner:MANDOM CORP

Gel composition and oil-in-water composition

The present invention provides a gel composition and an oil-in-water composition that have a strong barrier function. The gel composition comprises: one or more first compounds, which are represented by polyoxyethylene phytosterols; one or more second compounds, which are represented by polyethylene glycol distearate; one or more third compounds, which are represented by polyoxyethylene alkyl ethers; and one or more fourth compounds selected from the group consisting of ascorbic acid and salts thereof, ascorbic acid monoesters, ascorbic acid diesters, tocopherols and esters thereof, glycyrrhetinic acid and esters and salts thereof, and betamethasone and esters thereof.
Owner:SHISEIDO CO LTD

Aqueous inkjet ink and printed matter

PCT designated stage expiredWO2025126526A1Duplicating/marking methodsInksActive agentCarboxylic salt
Provided is an aqueous inkjet ink that, even when applied to a low-absorbency print substrate, e.g., coated paper, produces printed matter exhibiting no color bleeding due to the coalescence of droplets or white voids, having excellent dot circularity of the droplets, and showing good print density and color reproducibility, and that also has satisfactory ejection stability. The aqueous inkjet ink contains crosslinked-polymer particles (A) including a pigment and a surfactant (B), wherein the crosslinked-polymer particles (A) comprise a product of crosslinking between a compound (A-1) having a plurality of functional groups which react with a carboxy group and / or a carboxylate group and an uncrosslinked polymer (A-2), and the surfactant (B) comprises a polyoxyethylene alkyl ether compound (B-1) having a specific structure, and a nonionic surfactant (B-2) having an HLB value of 1-10, wherein the ratio between the content of the compound (B-1) and the content of the nonionic surfactant (B-2) is defined.
Owner:TOYO INK MFG CO LTD +1

Hair dye cosmetic

To provide a hair dye composition having good foam quality and foamability, excellent detergency, no creakiness during rinsing and excellent uniform dyeing.SOLUTION: There is provided a hair dye composition which contains a direct dye and is used by discharging in a foam state from a non-aerosol foamer container, the hair dye composition comprising (A) a fatty acid alkanolamide, (B) one or more selected from a polyoxyethylene hardened castor oil or a polyoxyethylene alkyl ether, (C) an amphoteric surfactant, (D) an anionic surfactant and (E) one or more selected from a cationic polymer or an amphoteric polymer, wherein the content of the component (A) is 0.1 to 3 mass%, the content of the component (B) is 0.1 to 2.5 mass%, the content of the component (C) is 1 to 15 mass%, the content of the component (D) is 0.1 to 3 mass%, and the content of the component (E) is 0.1 to 2.5 mass%, and the hair dye composition has a pH in the range of 4 to 6.8.SELECTED DRAWING: None
Owner:DARIYA

Composite surfactant composition based on synergistic effect as well as preparation method and application thereof

The invention relates to the technical field of biochemical detection, in particular to a composite surfactant composition based on a synergistic effect and a preparation method and application of the composite surfactant composition. The composite surfactant composition comprises a Tween emulsifier, an OP emulsifier and a polyoxyethylene alkyl ether emulsifier, and the Tween emulsifier can promote mutual dissolution of the OP emulsifier and the polyoxyethylene alkyl ether emulsifier through hydrogen-bond interaction; a uniform micelle structure with a small particle size is formed, the turbidity of a system is reduced, a long-chain hydrophobic group of the polyoxyethylene alkyl ether emulsifier can enhance the anchoring capacity to chylomicron and cooperates with a hydrophilic chain segment of the OP emulsifier, so that the lipid dispersion efficiency is improved, the interference inhibition rate is larger than or equal to 60%, and the stability of the system is improved. Meanwhile, after the Tween emulsifier, the OP emulsifier and the polyoxyethylene alkyl ether emulsifier are compounded, chyle particles can be efficiently wrapped, light scattering interference is reduced, and the anti-lipid interference efficiency is improved by more than or equal to 95% compared with that of a single component, so that the effect of eliminating interference in a lipid / chyle blood sample by adopting the composition is better.
Owner:URIT MEDICAL ELECTRONICS CO LTD

Cleansing composition, and method for cleansing hair and / or skin

To provide a cleaning composition that is excellent at suppressing changes in appearance due to low temperatures, and a method for cleaning hair and / or skin using the cleaning composition. [Solution] A cleansing composition comprising polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of 6 or less or more than 6, and one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof, wherein the amount of polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of 6 or less or more than 6 exceeds 1% by mass, and the pH at 25°C is 4.2 or higher and 7.5 or lower. A method for cleansing hair and / or skin using the cleansing composition.
Owner:MILBON CO LTD

Liquid skin cleansing composition

PendingJP2025090124ACosmetic preparationsToilet preparationsNeutral Amino AcidsCarboxylic acid
To provide a liquid skin cleansing composition that is superior in foam retention during washing, sense of moisture on post-wash skin, and low-temperature stability.SOLUTION: A liquid skin cleansing composition comprises: (A) one or more selected from polyoxyethylene alkyl ether sulfates and polyoxyethylene alkyl ether carboxylates; (B) a fatty acid having 10 to 20 carbon atoms or a salt thereof; (C) a cationic polymer; (D) a polyhydric alcohol; and (E) one or more selected from a neutral amino acid or a salt thereof, urea, and lactic acid or a salt thereof. The liquid skin cleansing composition is packaged in a foamer container.SELECTED DRAWING: None
Owner:LION CORP

NEW SYNTHESIS OF AKETAMINOPHENE COMPOUND WITHOUT SIDE EFFECTS ON THE LIVER

UndeterminedCY1125656T1Polyoxyethylene castor oilSodium acetate
A novel compound complex that has no side effects on a liver and is used to alleviate the toxicity of an acetaminophen (APAP) drug to the liver. The composition of the compound consists of (a) acetaminophen in a pharmaceutically effective amount and (b) a commonly-used safe and pharmaceutically acceptable excipient that can be combined with one or more of two drugs to reduce the toxicity of a drug metabolized by the hepatic enzyme CYP2E1 in the liver.The compound is selected from the following group: Tween 20, microcrystalline cellulose, dicalcium phosphate, polyoxyethylene 23 lauryl ether, saccharin, mannitol, polyoxyethylene alkyl ether, sucralose, pyrrolidone, sodium starch glycolate, S100 acrylic resin, sodium carboxymethylcellulose, polyoxyethylene polyoxyethylene, menthol, low-substituted propylcellulose hydrocarbon, pregelatinized starch, Dextrates NF hydrate, citric acid, polyoxyethylene castor oil, colloidal silicon, aliphatic polyethylene glycol monostearate ester, sorbic acid, lemon oil, hydroxypropylcellulose, sorbitol, acesulfame potassium, hypromellose phthalate, lactose monohydrate, maltodextrin, Brij 58, Brij 76, Tween 80, Tween 40, PEG 400, Peg 4000, PEG 2000, and the like, so as to reduce the side effects caused by acetaminophen on the liver.
Owner:INT EDUCATION FOUND

Oil-in-water emulsion cosmetic

[Problem] To provide an oil-in-water emulsion cosmetic having an excellent feel in use.[Solution] An oil-in-water emulsion cosmetic including (A) a cyclic carboxamide derivative having a specific structure or its salt, (B1) a polyoxyethylene dialkyl ester or a polyoxyethylene dialkyl ether having a specific structure, (B2) a polyoxyethylene alkyl ester or a polyoxyethylene alkyl ether having a specific structure, (C) an oil, and (D) water.
Owner:SHISEIDO CO LTD

Skin external composition

To provide a skin external composition which is an O / W emulsion having selective antibacterial and bactericidal properties, suppressed oil-water separation, suppressed skin irritation and an excellent moisturizing sensation.SOLUTION: There is provided a skin external composition which is an O / W emulsion and comprises (A) one or more selected from pantothenic acid or the like, (B) one or more surfactants which are selected from a polyethylene glycol fatty acid ester, a polyoxyethylene sorbitol fatty acid ester, a sorbitan fatty acid ester, a polyglycerol fatty acid ester, a polyoxyethylene glycerol fatty acid ester and a polyoxyethylene alkyl ether and have an HLB of 8 to 16 and (C) one or more selected from N-myristoyl-L-glutamate, N-stearoyl-L-glutamate, myristoyl methyl taurate, N-stearoyl-N-methyl taurate and stearoyl lactate.SELECTED DRAWING: None
Owner:LION CORP

Cosmetics

PendingJP2026105749AGlycerolNiacin
Providing a cosmetic that is not sticky, has excellent skin affinity, and has a smooth feeling. 【Solution means】The cosmetic according to the present disclosure contains (A) 0.1% by mass to 5% by mass of a glycine derivative represented by formula (1) or a salt thereof, (B) niacin or a derivative thereof, (C) a higher alcohol having 14 to 22 carbon atoms, (D) a hydrophilic polyoxyethylene alkyl ether, and (E) a glycerin monoalkyl ether. TIFF2026105749000006.tif43169 (In the formula, R 1 and R 2 each independently represents H, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an aminomethylcarbonyl group, an amidino group, an alkylcarbonyl group, an alkenylcarbonyl group, etc., and R 3 represents H, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. However, R 1 , R 2 , R 3 do not simultaneously become H.)
Owner:SHISEIDO CO LTD

Skin cleansing composition and skin cleansing method

To provide a skin cleansing composition excellent in foaming while using a cleansing component different from a fatty acid salt, and a skin cleansing method using the skin cleansing composition.SOLUTION: This skin cleansing composition is obtained by formulating a polyoxyethylene alkyl ether carboxylic acid or its salt with one or more kinds selected from an acylmethyltaurine or its salt, an acylmethylalanine or its salt and an acylglutamic acid or its salt. The skin cleaning method uses the skin cleaning composition.SELECTED DRAWING: None
Owner:MILBON CO LTD

Liquid skin cleansing composition

To provide a liquid skin cleansing composition which exhibits superior foam performance such as foam quality and foam retention, and also offers a superior sensation of hydration and non-tight feeling post-wash.SOLUTION: A liquid skin cleansing composition comprises: (A) a polyoxyethylene alkyl ether sulfate; (B) an amphoteric surfactant; (C) a nonionic surfactant; and (D) at least one selected from the group consisting of glucose and fructose.SELECTED DRAWING: None
Owner:LION CORP

Deodorant

To provide a deodorant that contains a hydrazide compound and offers excellent long-lasting deodorizing effects.SOLUTION: A deodorant contains a hydrazide compound and water, as well as at least one selected from the group consisting of polyhydric alcohol, 3-methoxy-3-methylbutanol, and polyoxyethylene alkyl ether, and a buffer agent. The deodorant continues to exhibit deodorizing effects even after drying, significantly enhancing the longevity of the deodorizing effect provided by the hydrazide compound.SELECTED DRAWING: None
Owner:KOBAYASHI PHARMA CO LTD

Liquid fragrance and cleaning agent composition for flush toilets

The objective of the present invention is to provide a liquid fragrance and cleaning agent composition for flush toilets that does not gel and is less prone to viscosity changes even when exposed to temperature changes or the addition of water. [Solution] (A) Having an alkyl group with 11 to 15 carbon atoms, the cloud point in a 1% by weight aqueous solution is 80 A specific polyoxyethylene alkyl ether type nonionic surfactant that is above ℃, and (B) A liquid fragrance and cleaning agent composition for flush toilets, containing fragrance components and having a viscosity of 60-800 mPa·s at 25°C, may possess the characteristic of being resistant to gelation and viscosity changes even with temperature changes or the addition of water.
Owner:KOBAYASHI PHARMA CO LTD

Method for measuring cholesterol in low-density lipoprotein, measurement reagent, and measurement kit

To provide a method for simply and precisely measuring cholesterol (LDL-C) in low-density lipoprotein in a sample without use of any surfactant having an alkylphenol structure, in terms of environmental friendliness. A method for measuring LDL-C in a sample, the method comprising: reacting the sample with (i) a combination of cholesterol ester hydrolase and cholesterol oxidase or (ii) a combination of cholesterol ester hydrolase, an oxidized coenzyme and cholesterol dehydrogenase, in an aqueous solvent which comprises: [a] one or more surfactants selected from the group consisting of a polyoxyethylene alkyl ether and a polyoxyethylene polyoxypropylene alkyl ether; and [b] a polyoxyethylene polyoxypropylene copolymer; and which does not comprise any surfactant having an alkylphenol structure; and measuring a substance formed or consumed in the reaction.
Owner:CANON MEDICAL DIAGNOSTICS CORP

Emulsion composition and treatment method

To provide an emulsion composition in which a stable emulsion composition can be obtained even in the case of using liquid silicone, and vegetable oil, liquid ester oil or liquid wax in combination, and a treatment method of hair, scalp and skin using the emulsion composition.SOLUTION: Provided are an emulsion composition in which (A1) polyoxyethylene alkyl ether or the like which has an alkyl group with a carbon number of 16 or more, and an average addition mole number of alkyl group of 10 or more, (B) silicone which is liquid at 25°C, (C) one or more kinds selected from vegetable oil, liquid ester oil and liquid wax, and (D) water are formulated, and an amount of blending of (D) water is 25 mass% or less, and a treatment method of hair, scalp and skin using the emulsion composition.SELECTED DRAWING: Figure 1
Owner:MILBON CO LTD

Release agent for plastics and method for producing plastics for food container packaging

To provide a release agent for plastics in the form of an organopolysiloxane emulsion having excellent storage stability, mechanical stability, wettability, and crack resistance, and with a low content of cyclic siloxane components of low polymerization degree, and a method for producing plastics for food container packaging employing the same.SOLUTION: The present invention provides a release agent for plastics and use thereof, characterized by being an emulsion having an average particle diameter of emulsion particles, as measured by a laser diffraction / scattering method, of more than 100 nm and 1,000 nm or less, the emulsion comprising: (A) 100 pts.mass of an organopolysiloxane having a kinematic viscosity at 25°C of 100 to 100,000 mm2 / s; (B) 0.1 to 18.0 pts.mass of an anionic surfactant; (C1) to (C3), three types of polyoxyethylene alkyl ethers having different contents (number of moles added) of oxyethylene units, each contained within a specific quantitative range; and (D) 35 to 100,000 pts.mass of water.SELECTED DRAWING: None
Owner:DOW TORAY CO LTD

Oil-in-water emulsion skin cosmetic composition

To provide an oil-in-water emulsion skin cosmetic composition that exhibits excellent skin penetration and storage stability of water-soluble active ingredients. [Solution] An oil-in-water emulsion skin cosmetic composition comprising (A) a water-soluble active ingredient having a molecular weight of 700 Da or less, (B) an oil that is solid at 25°C, (C) one or more nonionic surfactants selected from polyglycerin fatty acid esters and polyoxyethylene alkyl ethers, (D) water, and (E) a higher alcohol having 18 to 22 carbon atoms, wherein the HLB value of one of the (C) components or a mixture of two or more of the (C) components is 8 to 12, and the ratio of the content of the (C) component to the content of the (E) component {(C) / (E)} is 0.4 to 1.3.
Owner:LION CORP

cosmetic

PendingCN122318969ACarbon numberPolymer science
One embodiment of the cosmetic according to the present invention comprises: (A) a higher alcohol having 14 to 22 carbon atoms, (B) a hydrophilic polyoxyethylene alkyl ether, (C) a monoalkyl glycerol ether, and (D) a pyrimidinylpyrazole compound of the following general formula (1) or a pharmaceutically acceptable salt thereof. (In the above general formula (1), R...) 1 R 3 R 4 and R 6 Each independently represents an alkyl group having 1 to 3 carbon atoms, R 2 and R 5 Each can independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.
Owner:SHISEIDO CO LTD

Release agent for plastic

A release agent for plastic contains the following components (A) to (E) and has an average particle size of 200 nm or less: (A) 100 parts by mass of an organopolysiloxane having a viscosity at 25° C. of 100 to 100,000 mm2 / s; (B) 0.1 to 15.0 parts by mass of one or more anionic surfactants; (C) 1.0 to 30.0 parts by mass of a polyoxyethylene alkyl ether; (D) 0.5 to 15.0 parts by mass of a polyoxyethylene sorbitan fatty acid ester; and (E) 50 to 100,000 parts by mass of water. The release agent is an organopolysiloxane emulsion having excellent dilution stability and mechanical stability and favorable wettability, and hardly cracking plastic.
Owner:SHIN ETSU CHEMICAL CO LTD

Pimerolimus cream and preparation method thereof

The invention belongs to the field of external medicine preparations, and particularly relates to pimerolimus emulsifiable paste and a preparation method thereof. Compared with commercially available products, the pimerolimus emulsifiable paste obtained by matching the polyoxyethylene alkyl ether emulsifier and the specific humectant has more ideal drug skin permeability and product quality stability; the pimerolimus emulsifiable paste disclosed by the invention takes effect quickly, the use experience of a patient is relatively good, the compliance of the patient is high, and the requirement on the treatment of the patient with specific dermatitis at present can be met.
Owner:FRONT PHARM PLC

A method for preparing an acid fracturing retarder

PendingCN122563011AOrganosolvHydrolysis
This invention discloses a method for preparing a retarder for acid fracturing. The retarder is obtained by copolymerizing a nonionic water-soluble monomer, a silicon-containing monomer, an organic acid adsorbent monomer, and a hydrophobic monomer in an anhydrous organic solvent. After the reaction, the resulting product is directly used as an additive in the working fluid without the need for separation and drying. The organic acid adsorbent monomer contains an iminodiacetic acid structure, which chelates with Ca on the surface of carbonate rocks. 2+ Stable adsorption; after hydrolysis, the silicon-containing monomers condense with hydroxyl groups on the rock surface to form chemical bonds, while the condensation and cross-linking between silicon and hydroxyl groups construct a multi-layer network structure; the hydrophobic monomer is an allyl polyoxyethylene alkyl ether, which forms a hydrophobic barrier on the adsorption film surface through hydrophobic association. The resulting retarder, through the synergistic effect of four mechanisms—chelation adsorption, chemical bonding, multi-layer film formation, and hydrophobic shielding—can reduce the acid rock reaction rate by more than 90% at 150°C and in 20% hydrochloric acid, making it suitable for high-temperature carbonate rock acid fracturing operations.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Ink set

To provide an ink set which is excellent in pinning speed, beading, bleeding, and discharge stability.SOLUTION: An ink set is composed of a pretreatment liquid and pigment ink, wherein the pretreatment liquid contains water, a coagulant, and an organic solvent, a content of the coagulant in the pretreatment liquid is 1.0 mass% or more and 20.0 mass% or less, the pigment ink contains an organic solvent containing water, a coloring material and a glycol ester compound, polyoxyethylene alkyl ether, and a resin, a content of the polyoxyethylene alkyl ether in the pigment ink is 1.0 mass% or more and 5.0 mass% or less, a content of the glycol ether compound is 10.0 mass% or more and 20.0 mass% or less, a ratio P / R of a content P of the coloring material in the pigment ink to a content R of the resin is 0.25 or more and 3.0 or less, a mixture SP value of the organic solvent in the pigment ink is different from a mixture SP value of the organic solvent in the pretreatment liquid, and the difference therebetween is 2.0 (cal / cm3)0.5 or more.SELECTED DRAWING: None
Owner:RICOH CO LTD