330 results about "Hydroxyethyl methyl cellulose" patented technology

The invention provides a modified membrane fabric and a preparation method and application of the modified membrane fabric. The surface of the modified membrane fabric is coated with a polymer or polymer dispersion, and the polymer in the polymer or polymer dispersion may be polysaccharide, polypeptide and protein, may be an artificial polymerized polymer or may be a modified natural high polymer material or a mixture thereof, including but not limited to one or more selected from the group consisting of gelatins (such as gelatin and gelatin hydrolysate), cellulose ethers (e.g., carboxymethyl cellulose and hydroxyethyl methyl cellulose), modified starches (e.g., pullulan and hydroxypropyl starch), PVP, PVA, hyaluronic acids, albumin, chitosan, dextran, Arabic gum, xanthan gum, carrageenan, pectin, konjac gum, agar, Carbomer, carrageenin, polyvinylpyrrolidone, polyacrylamide, polyacrylate and polyacrylic acid and its derivatives. When the modified membrane fabric comes across water in use, the polymer on the surface of the modified membrane fabric can bond with water molecules to form a water retention system which has better retention performance compared with pure water and enables an evaporation speed to be slower and retention performance on the skin to be better.

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 provides a super slump type polycarboxylate water reducing agent for bored pile concrete. The water reducing agent is in a liquid state and comprises the following ingredients: sodium oleate, water reducing type polycarboxylate plasticizer, slump type polycarboxylate plasticizer, hydroxyethylidene diphosphonic acid, 2-acrylamide-2-methylpropanesulfonic acid/itaconic acid/acrylic acid terpolymer, hydroxypropyl methyl cellulose or hydroxyethyl methyl cellulose, air entraining agent and triisopropanolamine. The super slump type polycarboxylate water reducing agent for bored pile concrete provided by the invention has the following beneficial effects that by using the super slump type polycarboxylate water reducing agent, the bored pile concrete is good in homogeneity, the static bleeding rate of the bored pile concrete can be generally less than 1%, stable working performance can be maintained within a long time span, meeting the working property of concrete after 0.5-5.0h can be met by adjusting the formulation and dosage and improving the compressive strength ratio of the concrete, and the 28 d strength can be more than 130% of that of benchmark concrete. The invention further provides a preparation method of the super slump type polycarboxylate water reducing agent for bored pile concrete.

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 discloses a modified nano-kieselguhr inorganic thermal-insulation mortar coated with plant ash. The thermal-insulation mortar comprises the following raw materials in parts by weight: 50-60 parts of 42.5-level ordinary Portland cement, 20-30 parts of coal slack powder, 10-20 parts of plant straw powder, 10-20 parts of nano-kieselguhr, 40-50 parts of plant ash, 10-15 parts of starch emulsion, 2-3 parts of tetraisopropyl di(dioctylphosphate) titanate, 10-15 parts of modified vitrified microspheres, 2-4 parts of redispersible latex powder, 0.5-1.5 parts of methyl cellulose ether, 0.5-1 part of wood fiber, and 1-2 parts of polypropylene fiber. According to the invention, the produced thermal-insulation mortar is excellent in thermal insulation property and construction performance, high in intensity, good in weatherability, green and environment-friendly, and has extremely great market space and development prospect in the field of the building energy-saving application in China.

The invention provides a wet-mixed mortar modifier. Every 1,000 parts of the wet-mixed mortar modifier comprises 15-20 parts of sodium tripolyphosphate, 1-2 parts of sodium hexametaphosphate, 4-5 parts of phosphonobutane tricarboxylic acid, 32-44 parts of glucose, 24-33 parts of citric acid, 50-80 parts of zeolite powder, 80-100 parts of silica fume, 200 parts of heavy calcium carbonate, 10-15 parts of starch ether, 20-40 parts of hydroxyethyl methyl cellulose ether, 1-2 parts of sodium dodecyl sulfate, 28-50 parts of a polycarboxylate superplasticizer, 20-25 parts of a polycarboxylate slump retaining agent, 40-80 parts of a naphthalene-based superplasticizer, 20-25 parts of redispersible latex powder, 8-10 parts of beta-cyclodextrin and the balance of fly ash. The plasticity-maintaining time of the wet-mixed mortar modifier is prolonged to 36 h, the later strength and bondability of the wet-mixed mortar are improved simultaneously, the mortar durability is improved, the problems of high probability of hollowing, cracking, leaking and the like of plastering mortar are solved, and the wet-mixed mortar modifier has low energy consumption and is free of chemical and radioactive contamination.

An early-strengthening grouting material for the back liner of tunnel to resist against dispersing in water and denudation is proportionally prepared from powdered coal ash, slag, steel dregs, meta-kaolin, sodium fluorosilicate, stellite, hydroxyethyl methylcellulose, sand, water, and water glass solution. Its preparing process is also disclosed.

The invention provides a self-heat insulation aerated concrete building block and mortar for construction of building blocks, and relates to the field of building walls. The building block is prepared by the following components in parts by weight: 60-110 parts of a siliceous material and 25-65 parts of a calcareous material which are used as main materials, 2-6 parts of vitreous beads, 5-30 parts of an additive, 0.07-0.2 parts of a foaming agent, 1-10 parts of a foaming conditioning agent, 0.08-0.2 parts of a foam stabilizer, and water. The building block has the advantages of fire prevention, flame retardation, good mechanical strength, low heat conduction coefficient, and good thermal insulation performance. The mortar is mixed from the following components in percentages by weight: 15-45% of Portland cement, 10-30% of coarse sand, 30-50% of fine sand, 0.05-0.15% of PP fiber, 0.02-0.07% of methyl 2-hydroxyethyl cellulose, 3-5% of heavy calcium powder, 3-8% of coal ash, 0.5-1.5% of rubber powder, and water. The mortar has a high hardening volume density, so that generation of wall cracks and mortar joints is prevented, and thermal insulation performance of the wall is guaranteed.

The invention relates to an oral medicinal formulation of moxifloxacin and its preparation method, which comprises Moxifloxacin or its salt and/or its hydrate, and at least one film forming material for preparing intermediate particles of the preparation selected from hydroxy propyl methyl cellulose, hydroxy ethyl methyl cellulose, cellulose methyl, hydroxy propyl cellulose, hydroxy ethyl cellulose, sodium carboxymethyl cellulose, polyacrylic resins, polyethylene glycol, polyvinyl pyrrolidon-vinyl acetate copolymer, polyvinyl alcohol-polyethylene glycol grafted copolymer, carbopol, gelatine, poloxamer and polyvinyl pyrrolidon. The invention also discloses the process for preparing the pharmaceutical preparation.

The invention discloses an inorganic-organic composite permeable crystallization type waterproof agent. The waterproof agent is prepared from, by weight, 8-15 parts of sodium silicate, 3-6 parts of methyl sodium silicate, 2-6 parts of sodium alginate, 6-10 parts of gelatin, 2-6 parts of dodecyl ethoxy sulpho betaine, 2-5 parts of sodium carbonate, 1-4 parts of sodium citrate, 2-4 parts of triethanolamine, 1-9 parts of aluminum potassium sulfate, 1-6 parts of calcium sulfate, 1-3 parts of polyacrylamide, 1-4 parts of calcium lignosulphonate, 2-7 parts of hydroxyethyl methyl cellulose, 3-7 parts of calcium hydroxide, 1-3 parts of boric acid and 60-85 parts of water. The inorganic-organic composite permeable crystallization type waterproof agent has good waterproofness, endurance performance and self-curing performance and is low in cost and capable of being applied to waterproofing of house faces, basements, restrooms and the like.

The invention relates to an environmental-friendly water-soluble flux which is matched with lead-free solder; the environmental-friendly water-soluble flux comprises anhydrous citric acid, DL-malic acid, triethanolamine, modified polyvinylalcohol, polymethyl acrylate, vinyl acetate-ethylene copolymer powder, hydroxyethyl methyl cellulose ether, surfactant, benzotriazol, phenol and mixed solvent; the anhydrous citric acid, the DL-malic acid, the triethanolamine, the modified polyvinylalcohol, the polymethyl acrylate, the vinyl acetate-ethylene copolymer powder and the hydroxyethyl methyl cellulose ether are prepared into a complex active substance A through microencapsulated coating treatment; and the mixed solvent, the surfactant, the benzotriazol, the phenol, the modified polyvinylalcohol, the polymethyl acrylate and the complex active substance A are uniformly mixed by weight ratio to obtain the environmental-friendly water-soluble flux. The environmental-friendly water-soluble flux can effectively assist lead-free solder, particularly applicable to Sn-Ag-Cu lead-free solder, can enhance the solderability of the lead-free solder, can adapt to the high welding temperature requirement on the lead-free solder, has small action to the corrosion of lead-free solder alloys and little residue after welding, can be cleaned by water, has good welding point quality, clean surface and strong stability, and a dried circuit board has higher insulation resistance value.

The present invention provides an ink-jet recording sheet which is excellent in water resistance, capable of providing excellent ink-drying property and image quality, substantially free from blurring, and suitable for use as OHP sheets of which a high transparency is necessitated. The present process for producing an ink-jet recording sheet comprises applying to a base sheet, an aqueous solution of a water-soluble resin having no radically polymerizable double bond in the molecule and selected from the group consisting of polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, polyacryloyl morpholine, water-soluble polyvinyl acetal, poly-N-vinyl acetamide, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, gelatin, casein and derivatives of them, irradiating the resultant coating layer with electron beam before the coating layer is dried, to form a hydrogel, and drying the hydrogel. In the present invention, the water-soluble resin is usable in combination with a polyalkylene oxide compatible with the water-soluble resin.

An intravaginal bio-erodible microbicidal barrier device. The device comprises (a) at least one micronized compound selected from the group consisting of cellulose acetate phthalate and hydroxypropylmethylcellulos- e phthalate, and (b) at least one water soluble or water dispersible cellulose compound selected from the group consisting of hydroxypropylmethylcellulose, methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, hydroxyethylethylcellulose and hydroxypropylethylcellulose; or a pectin, such as an apple pectin. The device is prepared by a combination of foaming, freezing and freeze-drying processes.

The present composition is capable of forming a particle film and comprises: (a) less than 99.65% by weight of at least one particle; (b) at least one volumizing agent selected from the group consisting of: (i) cellulose selected from the group consisting of ethyl hydroxy ethyl cellulose, hydroxy ethyl cellulose, hydroxy propyl cellulose, hydroxy ethyl methyl cellulose, hydroxy propyl methyl cellulose, methyl cellulose, ethyl cellulose, and ethyl methyl cellulose and present in an amount greater than 0.35% by weight; and (ii) non-cellulosic component or cellulose other than said cellulose (i) present in an amount of at least 0.05% by weight; and optionally (c) at least one spreader. The composition may be used to form agricultural films.

The invention relates to external wall putty, which comprises two components of A and B according to following weight percentage: component A comprises 30-40 percent of heavy calcium carbonate, 5-15 percent of talcum powder, 25-35 percent of quartz sand, 25-30 percent of Portland, 42.5 of cement, 1-3 percent of subdividable latex powder, 0.2-0.5 percent of ethoxyl methyl cellulose ether, and 0.02-0.1 percent of modified starch ether; component B is 5-12 percent of crylic acid latex; assorting ratio of component A and B is 100:5-12. The external wall putty has the advantages that cracks and pores can be padded; after hard drying, the product is characterized by strong adhesion force, good water resistance and corrosion resistance, smooth surface layer, crack control, and good impact resistance; after tested, 0.8 MPa is reached under a standard state in terms of bond strength; after five times of freeze-thaw cycles, bond strength of the putty reaches 1.03 MPa; the putty can be extensively applied to alteration and face lifting of external walls, which provides smooth underside base material for applying dope.

An admixture for a cement mortar and a cement mortar including the same. The admixture includes at least one of hydroxyethylmethyl cellulose having a degree of substitution (DS) of a methyl group in a range from 1.6 to 2.0 and hydroxypropylmethyl cellulose having a molar substitution MS of a hydroxypropyl group in a range from 0.4 to 1.0.

The invention discloses water-resistant interior and exterior wall putty capable of absorbing and burying carbon dioxide in air. When the putty is prepared by the following materials in parts by weight when serving as interior wall putty: 24-60 parts of calcium hydroxide, 20-30 parts of heavy calcium carbonate, 20-30 parts of diatomite, 0.1-1 part of hydroxyethyl methyl cellulose and 0.05-0.5 part of catalyst; and when the putty is served as the exterior wall putty, 20-40 parts of white cement and 1-5 parts of re-dispersible glue powder are further added. The putty of the invention has the advantages of absorption and burial of carbon dioxide in air, sterilization, disinfection and air purification and strong water-resistance after being dried and solidified.

The invention discloses an anti-dispersion intensifier for underwater cast-in-place pile concrete, which comprises a polycarboxylic acid water reducer, hydroxyethyl methyl cellulose ether, starch ether, polyvinyl alcohol fiber, superfine ground slag, sodium tripolyphosphate, sulphoaluminate cement clinker and desulfurized gypsum. According to the technical scheme, when the product of the invention is added in underwater cast-in-place pile concrete during the preparation of the underwater cast-in-place pile concrete, the flocculability of the concrete is increased, the anti-dispersion performance is improved in a concrete casting process, the increase effect of the post strength of the concrete is obvious, the concrete has certain expansibility, the friction between the pile body and the soil is increased, and the bearing capacity of the pile body is improved.

The invention discloses a multifunctional antitranspirant. The contents and the weight percentage of each content thereof are as follows: hydroxyethyl methyl cellulose: 10 to 60 percent; biochemistry fulvic acid power: 5 to 25 percent; organic rare earths: 1 to 10 percent; sodium hexametahposphate: 0 to 5 percent; dodecyl sodium sulfate 0 to 4 percent; monopotassium phosphate: 3 to 15 percent; organic trace element: 1 to 14 percent; polyacrylate sodium: 0 to 10 percent; uniconazole: 0 to 2 percent; and a- rhodofix: 0 to 2 percent. The organic rare earth is obtained from carrying out chelation reaction to azotic acid rare earth with chelating agent; the organic trace element is a compound organic trace element which obtained from adding deionized water and chelating agent into one or a plurality of combinations of CuSO4, ZnSO4, FeSO4 and MnSO4 to carry out chelation reaction. The invention has the functions of drought control, wind proof, transpiration inhibition, plant growth adjustment and fortification, can raise the survival rate and preservation rate of plants, improve the survival state of plants and furtherly raise the ability to resist degeneration, resist disease, control drought and resist cold, thereby reaching the purpose of water saving, seed preserving and production and income increasing.

A process for preparing color dispersions comprising a first step of contacting water, a first colorant, and a gel composition comprising a first gel selected from methylcellulose, hydropropylmethylcellulose, hydroxyethylmethylcellulose, hydroxybutylmethylcellulose, hydroxyethylethylcellulose, and the mixture thereof, and a second gel selected from guar, pectin, carrageenan, gelatin, and the mixture thereof, to form a first colorant dispersion; a second step of contacting the first colorant dispersion with a composition comprising an aqueous dispersion of polymer particles, clay, and a peptizing agent to form a dispersion of protected first colorant particles. A color dispersion comprising the first colorant dispersion and a color coating comprising the color dispersion.

The invention discloses environment-friendly flexible interior wall putty and a preparation method thereof. The environment-friendly flexible interior wall putty comprises the following components by mass percent: 20-26% of water, 20-27% of acrylic emulsion, 5-10% of heavy calcium carbonate powder, 10-15% of light calcium carbonate powder, 12-19% of talcum powder, 5-7% of blanc fixe, 5-8% of bentonite, 2-3.7% of hydroxyethyl methyl cellulose ether, 1-3% of an antifreezing agent, 0.1-0.3% of a defoamer and 0.1-0.3% of a dispersant. The interior wall putty disclosed by the invention has the advantages of good flexibility, strong waterproofness, good crack resistance, fine and smooth surface texture after being scraped and the like, and is environment-friendly and not easy to atomize.

The invention discloses a chloroethylene suspension polymerization terminator and a preparation method and a use method thereof, belonging to a terminator used in a chloroethylene polymerization process. The chloroethylene suspension polymerization terminator is characterized by being an aqueous emulsion dispersion liquid and consisting of the following raw materials in parts by weight: 100 parts of deionized water, 2-30 parts of organic tin thermal stabilizer, 0.3-4.5 parts of polyvinyl alcohol I, 0-3.1 parts of polyvinyl alcohol II, 0.2-4.5 parts of cellulose ether and 0.1-3.5 parts of chain terminator, wherein the deionized water is industrial secondary desalted water; the alcoholysis degree of the polyvinyl alcohol I is between 75-85 percent; the alcoholysis degree of the polyvinyl alcohol II is between 50-60 percent; and the cellulose ether is methyl cellulose (MC), hydroxyethylmethylcellulose (HEC) or hydroxypropyl methyl cellulose (HPMC). The invention provides a chloroethylene suspension polymerization terminator which can be used for effectively terminating a chloroethylene polymerization reaction and remarkably improving the aging whiteness and heat resistance of polymerized resin, and the preparation method and the use method thereof.

The invention discloses putty leveling integrated gypsum mortar. The mortar is formed by mixing and stirring, by weight, 60-70 parts of desulfurized gypsum, 10-15 parts of 250-mesh heavy calcium carbonate, 6-10 parts of quartz sand of 20-30 meshes, 10-15 parts of 40-mesh quartz sand, 2-5 parts of glass bead heat preservation lightweight aggregate, 1-2 parts of redispersible emulsion powder VAE, 0.2-0.5 part of hydroxyethyl methylcellulose ether and 0.03-0.05 part of modified protein retarder. By means of the putty leveling integrated gypsum mortar, the traditional indoor leveling construction is greatly simplified, multiple construction procedures such as existing adhesion agents, leveling mortar and putty are replaced, forming can be completed at a time, the maintenance period is short, the construction period is greatly shortened, and the construction efficiency is improved.