3860 results about "Hydroxyethyl cellulose" patented technology

An extended release dosage composition of pharmaceutically active substances that have a water contact angle (θ) such that cos θ is between +0.9848 and −0.9848 presented as a matrix tablet containing the said pharmaceutically active substances, with / without suitable pharmaceutical excipients in intimate mixture with two groups of intelligent polymers having opposing wettability characteristics, one demonstrating a stronger tendency towards hydrophobicity and the other a stronger tendency towards hydrophilicity, the polymer combination being between the ratios of 1:50 and 50:1 amounts effective to control the release of said pharmaceutically active substances in a mathematically predictable manner, wherein the polymer demonstrating a stronger tendency towards hydrophobicity is not less than 5% wt / wt and preferably between 5-70% wt / wt of the final formulation composition. The intelligent polymers being ethylcellulose (EC) as a more strongly hydrophobic and hydroxyethylcellulose (HEC) and / or hydroxypropyl methylcellulose (HPMC) as more strongly hydrophilic (the ratio of HEC to HPMC being between 1:100 and 100:1). The matrix tablet is optionally coated with an enteric coat, 0-5%-15% wt / wt to prevent the initial burst effect seen in such systems and to impart gastrointestinal tract (GIT) “stealth” characteristics especially in the presence of food.

The invention provides a water-based drilling fluid composition containing an amine compound, which comprises the following components: a 0.5 to 5 weight percent of water-based amine compound as shown in formula I: RHN-Y-[OY']X-NHR', wherein Y, Y',x, R and R' are as defined in a manual; 0.1 to 1.0 weight percent of water-based tackifier which is selected from one or more types of xanthan gum, acrylamide-acrylic copolymer and hydroxyl ethyl cellulose; 0.5 to 5 weight percent of water-based fluid loss agent which is selected from one or more types of modified lignite, acrylic polymer, modified starch and modified cellulose; 2 to 12 weight percent of water-based inhibitor which is selected from one or more types of potassium chloride, potassium sulfate, formic acid, formic acid sodium, potassium chloride and epoxypropyltrimethylammonium chloride; and the composition can also further comprises coating agent, weighting agent, lubricant, borehole stabilizer and the like. The water-based drilling fluid composition has good inhibiting performance to clay shale drilling cuttings.

The present patent application relates to an agent for the coloring of keratin fibers based on oxidative dye precursors and / or direct-penetrating dyes, that contains a combination of at least one cationic hydroxyethyl cellulose and at least one acrylate copolymer in a suitable cosmetic carrier as well as a multicomponent-kit for the coloring of keratin fibers.

Methods, compositions and fluid loss control additives for cementing in subterranean zones are disclosed. A composition comprises a hydraulic cement, sufficient water to from a slurry and a water soluble biodegradable fluid loss control additive comprising a mixture of a condensation product and hydroxyethylcellulose having a molar substitution in the range of from about 1 mole to about 2.5 moles of ethylene oxide.

The invention relates to a chromium-free zinc aluminum anticorrosive paint and a preparation method. The invention adopts the technical scheme that the preparation method comprises the following steps of: stirring 5 to 25 weight percent of flake zinc powder and 5 to 15 weight percent of flake aluminum powder uniformly, adding 25 to 40 weight percent of organic solvent, 1.1 to 1.8 weight percent of dispersant, 3 to 8 weight percent of corrosion inhibitor and 3 to 10 weight percent of inorganic additive into the powder, and stirring the mixture for 20 to 40 minutes to form a base material; and then stirring 5 to 15 weight percent of modified resin, 1 to 3 weight percent of organic silane coupling agent and 25 to 30 weight percent of organic solvent uniformly, and adding the mixture into the base material; or stirring the mixture for 30 to 50 minutes to obtain the chromium-free zinc aluminum anticorrosive paint; or stirring the mixture for 30 to 50 minutes, adding 0.05 to 0.5 weight percent of hydroxyethyl cellulose into the mixture, and stirring the mixture for 20 to 50 minutes to obtain the chromium-free zinc aluminum anticorrosive paint. The preparation method has the characteristics of environment friendliness, low energy consumption and low cost; and a coating coated by the prepared chromium-free zinc aluminum anticorrosive paint has high impact strength, good corrosion resistance, strong bonding force and high hardness.

The transdermal system includes a sex hormone-containing adhesive matrix, which contains inclusions of a sex hormone in a hydrophilic non-crosslinked polymer in dissolved or dispersed form. The inclusions have a concentration of 20 to 90 percent by weight of the sex hormone, which is more than 50 percent by weight amorphous. The hydrophilic non-crosslinked polymer can be polyvinylpyrrolidone, methylcellulose, ethylcellulose or hydroxyethylcellulose. The adhesive matrix can be a polyisobutylene, ethylene-vinyl-acetate copolymer or a polystyrene-butadiene block copolymer.

The invention particularly relates to a smell-purifying inner wall latex paint and a preparation method thereof, belonging to the field of building decoration materials. The smell-purifying inner wall latex paint is prepared from the following raw materials in parts by weight: 22-28 parts of water, 0.4-0.5 part of hydroxyethyl cellulose, 0.1-0.2 part of a water-based multifunctional additive, 0.5-0.7 part of a water-based dispersant, 0.2-0.3 part of a water-based wetting agent, 0.4-0.5 part of a water-based defoaming agent, 0.4-0.6 part of a mildewproof agent, 15-18 parts of titanium pigment, 8-10 parts of kaolin, 10-15 parts of calcium carbonate, 3-4 parts of diatomite, 3-4 parts of negative ion slurry, 1-2 parts of imidazolidone, 20-25 parts of styrene-acrylic emulsion, 1.5-2.0 parts of a coalescing agent, 1.0-1.2 parts of an antifreezing agent, 0.2-0.3 part of a bactericidal preservative and 1.0-1.5 parts of a thickening agent. The smell-purifying inner wall latex paint prepared by the preparation method disclosed by the invention can simultaneously achieve low smell, low VOC (volatile organic compounds) and a function of purifying indoor air.

The invention relates to a fluorocarbon surfactant binary composite foam flooding system. The system is prepared by adopting fluorocarbon surfactant as a foaming agent, adopting a macromolecular compound as a foam stabilizer and adding water; the foaming agent is one or combination of sulphobetaine type fluorocarbon surfactant and amine oxide type fluorocarbon surfactant, or combination of alpha-alkenyl sulfonate and one of sulphobetaine type fluorocarbon surfactant and amine oxide type fluorocarbon surfactant; and the foam stabilizer is partially hydrolyzed polyacrylamide, polyvinyl pyrrolidone K30, polyvinyl pyrrolidone K90 or hydroxyethyl cellulose. An application method comprises that solution of the fluorocarbon surfactant binary composite foam flooding system and nitrogen are alternately injected into a stratum or a rock center so as to improve the recovery rate of crude oil.

The invention provides a real stone paint. The real stone paint comprises, by weight, 90-130 parts of water, 2-5 parts of hydroxyethyl cellulose, 2-5 parts of a dispersant, 1-3 parts of a wetting agent, 4-8 parts of an antifoaming agent, 2-3 parts of an antiseptic, 100-150 parts of an emulsion, 5-12 parts of a film forming assistant, 1-3 parts of a pH adjusting agent, 5-20 parts of an antifreeze agent and 400-900 parts of a color sand component, wherein the color sand component comprises two or more than two natural stone flours with similar color. The invention further provides a preparation method of the real stone paint. The natural stone flowers with similar color in raw materials are blended in the embodiment of the invention to balance the color difference of all the natural stone flours, so even the color of one of the natural stone flours changes, the color difference of real stone paint products in batches is very small under the contrast of other natural stone flours with similar color, thereby the color difference change of the real stone paint is well controlled.

A pharmaceutical composition is provided comprising a drug and a carrier medium, wherein the carrier medium comprisese (a) a matrix forming agent selected from the group consisting of hydroxyethylcelluloses, hydroxypropylcelluloses, hydroxypropylmethylcelluloses, hydroxypropylmethylcellulose phthalates, polyvinylpyrrolidones, polyethylene glycols, polyglycolized glycerides, cyclodextrins, carbomers and combinations thereof, and (b) a filler; and wherein the drug is hygroscopic and / or deliquescent and is dispersed in the carrier medium, and wherein the composition is a solid dispersion and is acceptably non-hygroscopic.

Viscosity-modified carbohydrate binder compositions are described. The binder compositions may include a carbohydrate, a nitrogen-containing compound, and a thickening agent. The binder compositions may have a Brookfield viscosity of 7 to 50 centipoise at 20° C. The thickening agents may include modified celluloses such as hydroxyethyl cellulose (HEC) and carboxymethyl cellulose (CMC), and polysaccharides such as xanthan gum, guar gum, and starches.

The invention relates to a bacteriostatic antistatic multifunctional non-woven fabric which is fabricated by the steps of unwinding non-woven gray fabric; applying finishing agent by using an ultrasonic foam applicator; extruding out redundant finishing agent by using a rolling mill; and then drying by using a baking oven and winding. The finishing agent includes the following components: sodium dodecyl sulfate, hydroxyethyl cellulose, nanometer silver powder, penetrating agent JFC, nano-silica, gamma-aminopropyltriethoxysilane, sorbitan ester, cetyltrimethyl ammonium chloride, methacrylic acid, beta-cyclodextrin and spices. The non-woven fabric has multiple functions of being antibacterial, anti-static, anti-ultraviolet, washing-resisting, fragrance lasting and the like. Especially the ultrasonic foam applicator is utilized to conduct foam finishing, and the finishing agent can be evenly penetrated in the fiber structure by means of the effect of ultrasonic waves, so as to lead nanometer material in the finishing agent and particles of the spices to disperse in the fabric and to be wrapped by organic matters to form a microcapsulation state, so that all functions and effects are lasting.

The invention discloses multifunctional nano compound treating fluid for protecting paper cultural relics. The multifunctional nano compound treating fluid takes deionized water as a solvent, and comprises nano magnesium hydroxide, nano titanium dioxide and hydroxyethyl cellulose, wherein nano magnesium hydroxide accounts for 0.2-1.0% of the weight of deionized water, nano titanium dioxide accounts for 0.1-0.8% of the weight of deionized water, and hydroxyethyl cellulose accounts for 0.2-0.8% of the weight of deionized water. The invention also discloses a preparation method of the multifunctional nano compound treating fluid. The multifunctional nano compound treating fluid can be used for large-area treatment of the paper cultural relics, and can be used for providing protection for deacidification, solidification, light-resistant degradation and mould proofing of the paper cultural relics during a large-area treatment of the paper cultural relics. The pH value of the paper cultural relics treated by the multifunctional nano compound treating fluid can reach an alkalescence degree, and the paper cultural relics have a certain alkali residue, can resist external acid, can be greatly improved in tensile strength, and have a certain antibacterial property.

The invention discloses a suspension type liquid compound fertilizer and a preparation method thereof, wherein the suspension type liquid compound fertilizer comprises the following components according to weight parts: 22 to 38 parts of mother liquor of suspension agent and 78 to 62 parts of nitrogenous fertilizer, phosphate, potassic fertilizer and trace elements. The mother liquor of suspensionagent consists of the following components according to weight parts: 4 to 12 parts of hydroxyethyl cellulose, 3 to 7 parts of silicon dioxide and 15 to 19 parts of water. The fertilizer has good stability and homogeneity, and can provide trace elements and fertilizer nutrients for crops simultaneously, thus leading the crops to absorb a large amount of elements and be complemented with trace elements simultaneously, leading to high nutrient utilization rate, and saving large amount of labor cost and fertilizer cost for peasants.

The invention discloses a heat preserving really stone paint and a preparation method thereof. The heat preserving really stone paint is prepared from the following components in parts by weight: 150-200 parts of a silicone acrylic emulsion, 450-500 parts of natural colored sand, 150-200 parts of hollow glass beads, 5-8 parts of hydroxyethyl cellulose, 200-250 parts of tap water and 35-50 parts of an auxiliary. By combining the silicone acrylic emulsion, the natural colored sand and the hollow glass beads, the heat preserving really stone paint disclosed by the invention has stabilities such as excellent weather resistance, tarnish resistance, temperature change resistance and ageing resistance and heat preserving performance as well as color diversification. In addition, the preparation method disclosed by the invention does not need grinding. Only dispersion is needed to prepare a product paint, so that the paint is simple in production process.

The invention relates to an antimicrobial and mildewproof paint and a preparation method thereof. The antimicrobial and mildewproof paint is prepared from the following raw materials by weight: 15-18 parts of water, 0.2-0.5 part of hydroxyethyl cellulose, 0.1-0.3 part of a water-based multifunctional additive, 0.5-1.0 part of a water-based dispersant, 0.1-0.2 part of a water-based wetting agent, 0.2-0.4 part of a water-based defoaming agent, 8-12 parts of titanium dioxide, 5-7 parts of kaolin, 8-10 parts of talc powder, 8-10 parts of calcium carbonate, 43-45 parts of a styrene acrylic emulsion, 1.5-3.0 parts of a coalescing agent, 0.8-1.0 part of an antifreezing agent, 0.1-0.2 part of a biocide mildewcide, and 0.3-0.8 part of a thickening agent. The antibiont of the antimicrobial and mildewproof paint prepared in the invention is not directly contacted by people and articles, and can achieve antimicrobial and mildewproof effects. And the antimicrobial and mildewproof paint has the advantages of high antimicrobial efficiency, good durability, high safety, and low drug resistance, etc.

A low VOC, HAPs free, substantially non-aqueous slurry for use as a rheology modifier in aqueous systems including but not limited to latex paints. The slurry comprises a particulate water-swelling polymer such as hydroxyethyl cellulose, mineral oil carrier liquid, a non-ionic surfactant, a particulate thickening agent, a defoamer, and optionally an amine component.

A composition for controlled delivery of at least one active substance into an aqueous medium by erosion at a preprogrammed rate of at least one surface of the composition, comprising a matrix comprising the active substance, the matrix being erodible in the aqueous medium in which the composition is to be used, and a coating having at least one opening exposing at least one surface of said matrix, the coating comprising a first cellulose derivative which has thermoplastic properties and which is substantially insoluble in the aqueous medium in which the composition is to be used, and at least one of a second cellulose derivative which is soluble or dispersible in water, a plasticizer, and a filler. The coating is a coating which crumbles and / or erodes upon exposure to the aqueous medium such as a body fluid. The first cellulose derivative may be, e.g., ethylcellulose, cellulose acetate, cellulose propionate or cellulose nitrate, and the second cellulose derivative may be, e.g. methylcellulose, carboxymethylcellulose or salts thereof, cellulose acetate phthalate, microcrystalline cellulose, ethylhydroxyethylcellulose, ethylmethylcellulose, hydroxyethylcellulose, hydroxyethylmethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxymethylcellulose or hydroxymethylpropylcellulose.

The invention relates to a nano-whisker-reinforced multifunctional diatom ooze coating. The nano-whisker-reinforced multifunctional diatom ooze coating is characterized in that 30 to 65wt% of diatomite, 0.5 to 2.5wt% of tetrapod-like nano-zinc oxide whiskers, 10 to 16wt% of superfine magnesium hydroxide, 5 to 15wt% of at least one crystalline aluminum salt, 10 to 40wt% of quartz sand, 0.5 to 1.5wt% of hydroxyethyl cellulose, 2 to 4.2wt% of one or two inorganic pigments and 0.5 to 3wt% of calcium hydroxide are mixed into the nano-whisker-reinforced multifunctional diatom ooze coating at a rotation rate of 500 to 800rpm. The nano-whisker-reinforced multifunctional diatom ooze coating has functions of resisting mildew and bacteria, purifying air in a room, and adjusting humidity. Compared with like products obtained by the existing technology, the nano-whisker-reinforced multifunctional diatom ooze coating has the advantages of strong adhesion to a wall surface, good durability, no falling-off of powder, no color fading and no cracking and falling-off, and is suitable for build interior decoration of airports, hospitals, office buildings, conference centers, hotels, villas, high-grade residential areas and entertainment places, and inner wall decoration of public places having forced flame-resistance requirements.

The invention discloses a cosmetic and a preparation method thereof. The cosmetic is prepared from five components of A, B, C, D and E. The cosmetic is composed of thirty raw materials including deionized water, hydroxyethyl cellulose, allantoin, carbopol U20, propanediol, 1,3-butanediol, sodium hyaluronate, an aloe vera extract, a natto extract, asiaticoside, vitamin C, bisabolol, an amino acid humectant, D-panthenol, VC ethyl ether, nicotinamide, glabridin, tranexamic acid, ceramide, algal polysaccharide, glucan, dipotassium glycyrrhizinate, an epidermal growth factor (EGF), triethanolamine, isothiazolinone, essence, squalane, jojoba oil, vitamin E oil and crystal sparkling pearl powder. The cosmetic has the functions of making skins fine and smooth, brightening the skins, repairing sensitive skins, controlling oil, toning skins and modifying skin blemishes, has no side effect or no dependence, and does not threaten health of a human body.

The invention discloses a fume anticorrosive paint which is prepared from 20.2-26.3% of nano modified polyurea, 17.4-21.5% of a titanium nano polymer, 12.0-14.0% of epoxy resin, 8.5-12.7% of a nano oxide particle intensifying agent, 5.2-7.4% of hydroxyethyl cellulose, 3.0-8.0% of talcum powder and 8.3-14.2% of a thickening agent. By adopting the method, the fume anticorrosive paint disclosed by the invention has the advantages that the adhesion property is high, the mechanical strength is high, the high-temperature smudging property is good, the anticorrosion effect is good, and toxic gases are not easy to generate in a high-temperature environment.

The invention relates to gum-protecting whitening toothpaste. The gum-protecting whitening toothpaste is prepared from the following components: sorbitol, xylitol, sodium phytate, brilliant blue pigment, sodium lauroyl sarcosine, ethylene diamine tetraacetic acid (EDTA) disodium, plant chitosan, trehalose, sodium saccharin, sodium pyrophosphate, glycerol, sodium hyaluronate, xanthan gum, hydroxyethyl cellulose, polyvinyl pyrrolidone (PVP) cross-linking agent, shell powder, silicon dioxide (friction type), silicon dioxide (thickening type), zinc citrate, lysozyme, pawpaw extract, vitamin E, peppermint essence, silica (whitening particles) and pure water. The components coordinate with one another, so that the effects of protecting gum and whitening teeth are achieved.

The present invention provides compositions and methods for tissue repair using a cytocompatible self-gelling cross-linked hydrogel. The composition comprises a biocompatible mixture of chitosan, bifunctional dialdehyde, and hydroxylated polymer, which can be used to immobilize or encapsulate viable cells, or bioactive substances. The method includes the process of mixing bioactive substances, live cells, and / or extracellular matrix components with a cross-linking solution comprising a bifunctional aldehyde-treated hydroxylated polymer such as hydroxyethyl cellulose. The cross-linking solution is then mixed homogenously with a neutral isotonic chitosan solution. The chitosan becomes cross-linked by the bifunctional aldehyde, while the cells are protected from potentially nocive effects of the aldehyde cross-linker by the hydroxylated polymer. The injectable solution retains cell viability and bioactivity, and immobilizes cells at the site of injection or delivery. Depending on the particular application, mixtures of chitosan and bifunctional dialdehyde may be employed. The injectable solution also liberates bioactive substances with controlled release kinetics from the site of injection.

The invention relates to an A popular type multifunctional foam fire extinguishing agent, which mainly consists of a protecting colloid consisting of microlite chitin, sesbania gum and hydroxyethyl cellulose; vesicant consisting of polyoxyethylene fatty alcohol sodium sulfate, alkyl polysaccharide glycoside, salt free imidazoline and hydrocarbon surface active agent; burn resisting film forming agent consisting of silicone surface active agent, fluorocarbon surface active agent and fluorocarbon silicone surface active agent; flame retardant comprising one or a plurality of condensed phosphate, borax and boric acid; addition agent consisting of short chain alcohol and ether and metal salt; osmotic agent which is high efficient osmotic agent BS or rapid osmotic agent T; and water margin. Being applicable for the prior various foam fire extinguishing devices, the fire extinguishing agent not only can put out the polar and non-polar A, B fires, but also can effectively put out the polar and non-polar mixture fires with any ratio with little fire extinguishing agent and water. The invention has the advantages of simple processing technique, no special facility, low cost and no environmental pollution in production and usage.

A modified cellulose product comprising cellulose ether, such as carboxymethyl cellulose, hydroxyethyl cellullose, carboxymethyl hydroxyethyl cellulose, methyl cellulose, hydroxyethyl methyl cellulose or ethyl hydroxyethyl cellulose, or xanthan gum product, characterized in that it further comprises salts of aluminium-, ferro-, ferri-, zinc-, nickel-, tin(2)- or tin(4)-cations, and nitrilo-tri-acetic acid, 1,2-cyclo-hexan-di-amin-N,N,N',N'-tetra-acetic acid, di-ethylen-tri-amine-penta-acetic acid, ethylen-di-oxy-bis(ethylen-nitrilo)-tetra-acetic acid, (N-(2-hydroxy-ethyl)-ethylen-diamin-N, N',N',tri-acetic acid, tri-ethylen-tetra-amine-hexa-acetic acid or N-(hydroxyethyl) ethylene-di-amine-tri-acetic acid as a ligand. The product can be used especially as a drilling mud additive.

The invention relates to polypeptides having glucanase, e.g., endoglucanase, mannanase, xylanase activity or a combination of these activities, and polynucleotides encoding them. In one aspect, the glucanase activity is an endoglucanase activity (e.g., endo-1,4-beta-D-glucan 4-glucano hydrolase activity) and comprises hydrolysis of 1,4-beta-D-glycosidic linkages in cellulose, cellulose derivatives (e.g., carboxy methyl cellulose and hydroxy ethyl cellulose) lichenin, beta-1,4 bonds in mixed beta-1,3 glucans, such as cereal beta-D-glucans or xyloglucans and other plant material containing cellulosic parts. In addition, methods of designing new enzymes and methods of use thereof are also provided. In alternative aspects, the new glucanases e.g., endoglucanases, mannanases, xylanases have increased activity and stability, including thermotolerance or thermostability, at increased or decreased pHs and temperatures.

The invention relates to a fluid loss control agent for drilling fluid, which is prepared through reacting natural humic acid with sodium-hydroxide to obtain humic sodium salts, then carrying out reduction copolymerization with sulfonated asphalt, hydroxyethyl cellulose, polyacrylamide, water-soluble silicon oil AND methyl aldehyde.

The invention relates to multifunctional green environment-friendly interior wall emulsion paint comprising a styrene-acrylate copolymerized microemulsion, pure water, hydroxyethyl cellulose, an antifoaming agent, propylene glycol, titanium dioxide, heavy calcium carbonate powder, kaolin, saponite, a film-forming auxiliary agent, a plant scent agent, nano-grade titanium dioxide powder, nano-grade silica powder, zinc oxide powder, negative ion powder, ferromanganese powder, pyrethrin, polyvinyl alcohol, an elastic acrylic emulsion, and the like. The multifunctional green environment-friendly interior wall emulsion paint is characterized by aging resistance, peeling resistance, discoloration resistance, good weathering resistance, no toxicity, no odor, good leveling property, and easy construction. The paint can be prepared into a plurality of colors. With the paint, a decorated wall surface can be provided with elegant and splendid effects, and beautiful and dignified appearances as natural marbles. The production cost of the paint is low. With the paint, a produced paint film has a strong antifouling function, and has mould proofing and algae inhibiting functions. Also, the paint has good functions of sterilizing, disinfecting, and electromagnetic radiation resisting.

The invention relates to a hair dye, especially a natural plant hair dye. Wherein, it is formed by mixed A and B solutions; A agent is formed by agent and metal chelant, while the agent can be guar gum, polyquaternary ammonium salt or glycol cellulose, and the chelant can be soluble ferric salt or ferrous salt; B agent contains pomegranate bark extractive and glycol cellulose; while it also can contain logwood extractive as color agent. The invention has short dye time, uniform dye and washing resistance, nearly without side effects.

A method for controlling Pitch and Stickies is disclosed. The method comprises adding hydrophobically modified hydroxyethyl cellulose (HMHEC) and cationic polymers to a cellulosic fiber slurry (pulp) or to a paper process or to a paper making system and results in a higher degree of inhibiting organic deposition and retention of pitch on paper fiber as compared to the inhibition of the individual ingredients. The combination of HMHEC and cationic polymers surprising results in a synergistic effect.