96 results about "Hydroxypropylmethyl cellulose" patented technology

The application discloses a lithium-free high-heat-resistant ceramic mud and a preparation method thereof, and relates to the technical field of ceramic materials. In the preparation of the lithium-free high-heat-resistant ceramic mud, alumina is reacted with 3-(2,3-epoxypropoxy) propyl trimethoxysilane to obtain pre-modified alumina; the pre-modified alumina is reacted with starch to obtain modified alumina; ethyl acetoacetate, isopropyl alcohol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide are mixed to form a spinning solution, the spinning solution is electrospun, and then immersed in yttrium oxide sol to obtain alumina-zirconia-yttria composite fibers; the modified alumina, talc, alumina-zirconia-yttria fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water are stirred and mixed, and vacuum pugging is carried out to obtain the lithium-free high-heat-resistant ceramic mud. The lithium-free high-heat-resistant ceramic mud prepared by the application has good thermal shock resistance and bending strength after sintering.

This invention belongs to the technical field of filtration aids for food-grade enzyme preparation production, specifically relating to a composite filter aid comprising food-grade diatomaceous earth, food-grade expanded perlite, microcrystalline cellulose, food-grade silica powder, food-grade calcium carbonate, food-grade magnesium carbonate, hydroxypropyl methylcellulose, a diatomaceous earth porous framework compound modified with a low-adsorption sodium alginate pectin silica hydration layer for glucose oxidase, a perlite microcrystalline cellulose chitosan tannic acid-bridged gradient pore modification compound, and food-grade silica. Its preparation includes preparation of a basic mixture, preparation of a composite mixture, drying and cooling, and sieving. This invention forms a loose and stable filter cake, reduces filtration resistance, and improves the filtration speed, filtrate clarity, and enzyme activity retention rate of the glucose oxidase production solution.

The application discloses a drying method of hibiscus flowers. The method comprises the following steps: 1) enzyme inactivation and color protection: the hibiscus flowers are sequentially immersed in an acidic citric acid-vitamin C solution and a solution added with corn stem and leaf water extract, so as to efficiently inactivate oxidase and protect color; 2) composite film construction: a hibiscus leaf extract solution is used as a natural film-forming matrix, is compounded with hydroxypropyl methyl cellulose and the like to form a film-forming solution, the hibiscus flowers are immersed and coated, and a supercritical CO2 drying technology is used to form a uniform and porous protective film on the petal surface; and 3) hot air drying: two-stage gradient temperature and humidity control is adopted for final drying. The application can significantly inhibit enzyme browning and non-enzyme browning in the drying process, effectively reduce the loss of functional components such as anthocyanins and flavonoids, solve the problems of petal blackening, brittleness, fragility and the like caused by traditional drying, and the finished product is full in shape, bright in color, and green in the whole process.

A pharmaceutical composition comprising: an active pharmaceutical ingredient (API); 1-45 wt% non-gelatin matrix former comprising hydroxypropyl methylcellulose (hypromellose, HPMC), methyl cellulose,

The application discloses a kind of concrete for TBM lining in-situ 3D printing and preparation method thereof, belong to civil engineering materials field.It includes by weight parts: 6000 parts cementitious material, 5400-6600 parts quartz sand, 1290-1350 parts water, 0.6-0.9 parts hydroxypropyl methyl cellulose, 24-36 parts polycarboxylic acid water reducing agent, 6-9 parts calcium formate, 12-18 parts xanthan gum, 300-540 parts MgO expanding agent, 75-105 parts polyoxyalkyl alcohol shrinkage reducing agent, 40-80 parts steel fiber, 120-180 parts Fe3O4 nanoparticles.The cementitious material is mixed by Portland cement and sulphoaluminate cement, and the mass ratio is 1:(0.67-1.5).The concrete has low water-binder ratio, excellent extrudability, fast initial setting and high early strength, and can realize continuous, high-strength and integrated in-situ 3D printing construction of TBM tunnel lining.

The application discloses a mine filling and plugging material quick-setting additive and a preparation method thereof. The water-retaining agent in the quick-setting additive is a composite water-retaining system formed by hydroxypropyl methyl cellulose and modified starch. The hydroxypropyl methyl cellulose physically wraps free water in the slurry; the modified starch adsorbs water molecules through hydrogen bonding, and the double mechanism significantly reduces the bleeding rate; the coagulation accelerator adopts a spray drying wrapping technology, and a core-shell structure composite particle is constructed, in which aluminum lithium sulfate is used as a 'quick-release core', and active calcium silicate gel slurry obtained by the reaction of nano calcium silicate and sodium silicate is used as a'slow-release wrapping layer', so that the coagulation accelerator can promote coagulation, prevent sodium silicate from being consumed too early, and realize sustained coagulation. The early strength agent adopts a gel-gelling method, so that the early strength agent can provide persistent early strength excitation and solve the problem of weak late strength growth. The interface reinforcing agent can make the interface transition zone structure more strong and tough, and improve the integrity and damage resistance after the slurry coagulation and hardening.

The application discloses recombinant collagen type III, a hydrogel, a preparation method and application, and belongs to the technical field of medical materials. The protein has an amino acid sequence as shown in SEQ ID No. 2 or 3, and has excellent biocompatibility and cell activity. The hydrogel based on the protein is formed by mixing a solution of the protein with a solution containing oxidized sodium alginate and hydroxypropyl methyl cellulose, adjusting pH, sequentially introducing an EDC / NHS crosslinking system and calcium ions, and standing. The process constructs a stable double-network structure of EDC / NHS catalyzed covalent crosslinking network and OSA-Ca 2+ ion crosslinking network synergistic effect. The obtained hydrogel has high mechanical strength, excellent toughness, long-lasting wet tissue adhesion and suitable swelling performance, can effectively adapt to the complex stress changes of dynamic wounds, and provides an active matrix for cells, and promotes tissue repair.

The present application relates to a kind of preparation method of plant composition with hair-nourishing effect, belong to hair-washing composition field, including the following mass parts raw materials: 30-40 parts modified pickering emulsion, 15-25 parts compound surfactant system, 15-30 parts goat milk, 1-3 parts avocado seed extract, 5-7 parts hydroxypropyl methyl cellulose and 80-100 parts deionized water;White hedyarium alcohol, carvacol, fermented ring grass extract, ganoderma extract, ginger extract, cypress leaf extract are loaded using modified starch, so that plant extract can better play a role in system, promote the absorption of scalp to plant extract;By adding goat milk and part of plant extract synergistically, while using stabilizer, increase the viscosity and stability of system, inhibit the denaturation of protein in goat milk and the stability of plant extract component.

The present application relates to the technical field of gynecological medical biomaterials, and discloses a probiotic prebiotic repair composition for endogenous regulation of vaginal microecological balance, which is composed of active ingredients and medicinal excipients; the active ingredients are composed of 500-600 parts of galactooligosaccharides, 100-120 parts of isomaltooligosaccharides, 20-30 parts of human collagen and 15-25 parts of beta-glucan; and the medicinal excipients are selected from one or more of a lactic acid-sodium lactate pH buffer system, a carbomer mucosal adhesive material and a hydroxypropyl methylcellulose sustained-release matrix. The probiotic prebiotic repair composition for endogenous regulation of vaginal microecological balance and the preparation method thereof completely avoid exogenous live bacteria, recombinant proteins and antiviral components by using galactooligosaccharides and isomaltooligosaccharides to synergistically activate native lactobacilli, human collagen to repair the mucosal barrier, beta-glucan to enhance local immunity, a lactic acid-sodium lactate buffer system to stabilize the pH environment and hydroxypropyl methylcellulose to construct a three-dimensional sustained-release matrix.

The application discloses a kind of iron oxide red dyeing ceramic grinding wheel and its preparation process, wherein, iron oxide red dyeing ceramic grinding wheel includes the following components according to weight parts: abrasive 90-120 parts, ceramic binder 10-28 parts, iron oxide red 0.2-1 part, temporary adhesive 0.5~2 parts, and wetting agent 2~5 parts, the temporary adhesive is hydroxypropyl methyl cellulose, the wetting agent is polyquaternary ammonium salt aqueous solution, and the concentration of polyquaternary ammonium salt aqueous solution is 0.5%~5%.The application prevents the aggregation and sedimentation of iron oxide red particles by the electrostatic effect and physical barrier effect of polyquaternary ammonium salt, so that the stability of the whole mixed liquid system can be maintained for a long time, which is beneficial to the uniform dispersion of iron oxide red particles;hydroxypropyl methyl cellulose has strong water retention, which can avoid cracking and other problems caused by excessive temperature difference and rapid water evaporation during the heating and drying process of grinding wheel blank.

This invention discloses an oil-resistant, high-temperature, fast-dissolving, edible packaging film and its preparation method, belonging to the field of biodegradable polymer materials technology. By mass percentage, the raw materials for preparing this oil-resistant, high-temperature, fast-dissolving, edible packaging film include 0.5-5.0% hydroxypropyl methylcellulose, 0.1-1.5% sorbitol, 1.0-9.0% gelling agent, 0.05-1.0% coagulant, and the balance being water. The gelling agent comprises carrageenan, low-acyl gellan gum, and xanthan gum in a mass ratio of 1:0.1-0.3:0.01-0.05, with the mass ratio of hydroxypropyl methylcellulose to xanthan gum being 1:0.01-0.1. This invention rationally combines three gelling components with different properties, along with hydroxypropyl methylcellulose and sorbitol, to achieve good mechanical properties and oxygen barrier properties, while also achieving high-temperature fast dissolution and oil resistance.

This invention relates to a choleretic traditional Chinese medicine composition, its preparation method, and its application, belonging to the field of traditional Chinese medicine preparation technology. The microcapsules prepared from this choleretic traditional Chinese medicine composition consist of a core and a coating. The core contains a traditional Chinese medicine extract, pregelatinized starch, sodium alginate, and croscarmellose sodium. The coating contains hydroxypropyl cellulose and hydroxypropyl methylcellulose E5, PEG4000, and talc. The traditional Chinese medicine extract is made from Artemisia capillaris, Lysimachia christinae, Rheum palmatum, Scutellaria baicalensis, Taraxacum mongolicum, Forsythia suspensa, Curcuma longa, Curcuma longa, Bupleurum chinense, Citrus aurantium, and Aucklandia lappa. This choleretic traditional Chinese medicine composition has the effects of promoting bile flow and expelling gallstones, detoxifying and reducing swelling, with a stable drug release rate, definite efficacy, and few toxic side effects. It can be used for the prevention and / or treatment of acute and chronic gallstones and / or cholecystitis.

This solid dispersion comprises: a component (1) which is one or more selected from the group consisting of a compound represented by formula (I), a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable solvate thereof; and a component (2) which is one or more polymers selected from the group consisting of hydroxypropyl methylcellulose and a derivative thereof, wherein the total content of the component (2) per 1 part by mass of the total content of the component (1) is more than 0.1 parts by mass and less than 1.0 part by mass. This composition comprises said solid dispersion and an alkyl sulfate.

The application discloses light thermal-insulation composite mortar and a production equipment thereof and relates to the technical field of composite mortar, which comprises cement 35-40 parts, converter slag granular material 8-12 parts, reinforcing material 12-18 parts, composite thermal-insulation aggregate 16-22 parts, resin type redispersible emulsion powder 0.25-0.35 parts, cold water type polyvinyl alcohol 0.6-0.9 parts, hydroxypropyl methyl cellulose ether 0.1-0.2 parts, air entraining agent 0.01-0.03 parts, water glass 0.06-0.1 parts, inorganic retarder 0.005-0.01 parts, polystyrene granules 8-13 parts, vitrified microbeads 30-50 parts, redispersible emulsion powder 1-2 parts, water-retaining agent 0.2-0.6 parts. By incorporating the water-retaining agent, the volume of the mortar can be prevented from shrinking with the evaporation of water. In the shrinking process, if the cement-containing material has no strength or very low strength, the shrinkage stress is greater than the tensile strength of the material, and the shrinkage amount will be manifested as the problem of relatively concentrated large cracks.

The application discloses an ophthalmic preparation and application thereof, and belongs to the technical field of ophthalmic preparations. The ophthalmic preparation comprises the following components: recombinant human beta nerve growth factor, hydrochloric acid histidine or citrate, polyvinyl alcohol or hydroxypropyl methyl cellulose, L-methionine, and a protective agent, wherein the protective agent is selected from one or more of trehalose, glycerol and amino acids; and the pH value of the ophthalmic preparation is 6.0-7.0. The ophthalmic preparation has good storage stability.

Provided is a mixed powder for a paste brazing filler metal; a paste brazing filler metal produced using the mixed powder; and a method for producing the paste brazing filler metal. A paste brazing filler metal according to the present invention can be produced by mixing 8.0 to 22.0 parts by mass of an aqueous solution containing an organic solvent, etc. with 100 parts by mass of a mixed powder for a paste brazing filler metal, wherein the mass ratio of a brazing filler metal powder to a resin powder of water-soluble thickening agent is 99.88 to 97.90:0.12 to 2.10. It is preferable that the resin powder is cellulose-based. And it is particularly preferable that the resin powder is one or two selected from methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and hydroxypropylmethyl cellulose.

This application belongs to the technical field of flame-retardant intumescent thermal insulation materials, specifically providing an inorganic intumescent thermal insulation fireproof coating and its preparation method. The inorganic intumescent thermal insulation fireproof coating comprises the following components: potassium silicate solution, aluminum dihydrogen phosphate, porous composite filler, melamine, pentaerythritol, aluminum hydroxide, glass powder, expandable graphite, mullite fiber, BYK-025 defoamer, sodium tripolyphosphate dispersant, and hydroxypropyl methylcellulose thickener. The inorganic intumescent thermal insulation fireproof coating obtained by this application exhibits excellent bonding strength, high-temperature structural stability, and controllable expansion, making it suitable for fire protection in scenarios such as new energy battery boxes and steel structure buildings, and capable of meeting stringent fire protection requirements.

The application discloses modified cellulose ether and a preparation method thereof, and relates to the technical field of building materials. The modified cellulose ether is prepared from hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose ether, air entraining agent and other additives, and specific modified starch ether. The modified starch ether is prepared from starch as a matrix through two-step reactions of grafting a hydroxyl monomer and etherification of a hydroxypropyl monomer. The modified cellulose ether has synergistic effects of various components, relies on the unique molecular structure of the modified starch ether, greatly improves water retention performance, construction workability and plasticity retention capacity, and has better water retention rate, scraping feeling and open time than pure hydroxypropyl methyl cellulose. Different monomer types and ratios have a significant influence on core performance, and the modified cellulose ether can fully play the roles of thickening, anti-sagging and anti-slippage and has excellent water retention rate in building mortar and other materials.

The purpose of the present invention is to provide an intraoral adhesive film which has a good balance of adhesive properties and sustained-release properties. Specifically, the present invention provides an intraoral adhesive film containing (A) ι carrageenan and (B) κ carrageenan. It is preferable that the film further contain (C) a water soluble polymer such as tamarind gum, gum arabic, karaya gum, xanthan gum, gellan gum, tragacanth gum, guar gum, tara gum, locust bean gum, pullulan, gelatin, casein, pectin, agar, glucomannan, galactomannan, starch, carboxymethyl starch, dextrin, alginic acid, alginic acid ester, chitin, chitosan, carboxymethyl cellulose, λ carrageenan, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, methyl cellulose, or ethyl cellulose.

The application relates to the technical field of building materials, and discloses a sprayable inorganic fireproof thermal insulation material and a preparation method thereof, wherein the raw materials include, in terms of mass parts, fly ash 50-80 parts, red mud 10-30 parts, slag powder 10-25 parts, alkali activator 15-25 parts, a composite foaming agent containing gas-forming components 2.0-5.0 parts and acid excitation components 1.5-4.0 parts, a composite foam stabilizing enhancer containing hydroxypropyl methyl cellulose 0.2-1.0 parts, sodium carboxymethyl cellulose 0.1-0.5 parts and calcium stearate 0.5-2.0 parts, reinforcing fibers 0.01-0.1 parts and water 25-45 parts. Through deep integration of multi-source industrial solid waste alkali activation technology and acid-alkali decoupling in-situ foaming spraying process, a high-performance inorganic fireproof thermal insulation system integrating A1-grade intrinsic fireproofing, multi-scale lightweight high-strength structure, efficient seamless construction and full-life-cycle green low-carbon is constructed.

This invention belongs to the technical field of building waterproofing and leak-stopping materials, specifically relating to a leak-stopping material and its preparation method. The leak-stopping material of this invention comprises: powder and liquid components. The liquid component includes water. By mass parts, the powder comprises: 40-60 parts of sulfoaluminate cement, 10-20 parts of ordinary silicate cement, 15-25 parts of composite filler, 3.0-5.0 parts of ettringite precursor, 0.04-0.1 parts of water-reducing agent, 0.05-0.1 parts of hydroxypropyl methylcellulose ether, and 1.0-3.0 parts of penetrating crystallizing active powder. By mass parts, the liquid component comprises: 50-95 parts of deionized water and 5-50 parts of silicone-acrylic anti-permeability emulsion. The composite filler is fly ash modified with a silane coupling agent, and the particle size of the composite filler is 5-10 μm. The leak-stopping material of this invention has low water absorption, excellent corrosion resistance, good mechanical properties, and durability.

The present application relates to the technical field of washing products, and discloses a laundry detergent with mosquito-repelling function and a preparation method thereof, which comprises non-ionic surfactant, picaridin, repellent, sorbitan monooleate, hydroxypropyl methyl cellulose, anionic surfactant, deionized water and auxiliary agents, etc., by weight percentage; in the washing dilution process, with the decrease of the surfactant concentration, the sorbitan monooleate promotes the spontaneous phase separation of picaridin and repellent to form hydrophobic droplets, which are anchored and deposited on the fabric surface by the hydroxypropyl methyl cellulose; the preparation method is prepared by respectively preparing the hydrophobic premix liquid containing mosquito-repelling components and the aqueous phase matrix, and then performing critical assembly. The present application solves the problem that the mosquito-repelling components are easy to be lost with the rinsing liquid, improves the retention rate of active substances on the fabric, and effectively prolongs the mosquito-repelling time of the washed clothes.

The invention discloses a compound preparation suitable for traditional Chinese medicine constitution conditioning and a preparation method thereof. The compound preparation comprises a stepped ternary-quaternary-quinary compound preparation. The ternary complex is based on hydroxypropyl methyl cellulose, fumed silica and silicified microcrystalline cellulose, and digestive tract mucosa protection and body safety tolerance establishment are achieved; in the quaternary compound, resistant dextrin is added on the basis of the ternary compound, so that the digestion function and the defecation rhythm are stable; l-glutamine is further added to the quinary compound on the basis of a quaternary compound, so that the whole body state is harmonized, and nine constitutions in traditional Chinese medicine are balanced. The three components strictly follow a ternary-quaternary-quinary sequence for use, and a complete conditioning path from safe tolerance establishment to intestinal environment regulation to whole body consolidation is formed. The invention provides a preparation process which is high in forming rate, good in stability, resistant to moisture absorption, excellent in reconstituability and suitable for industrial large-scale production.

This application provides a low-alkalinity composite phosphorus-fluorine curing agent for phosphogypsum and its preparation method. The composite phosphorus-fluorine curing agent comprises the following raw materials in parts by weight: 100 parts by weight of granulated blast furnace slag powder, 30-60 parts by weight of modified metakaolin, 10-20 parts by weight of silica fume, 2-10 parts by weight of inorganic coagulant, 0.1-1 parts by weight of chelating and dispersing agent, 0.1-0.3 parts by weight of dodecylbenzenesulfonic acid, 0.15-0.3 parts by weight of sodium citrate, and 0.05-0.15 parts by weight of hydroxypropyl methylcellulose ether. The modified metakaolin is obtained by coating amorphous aluminum hydroxide onto the surface of metakaolin using a urea hydrolysis precipitation method. By synergistically introducing surface-functionalized modified metakaolin and a process control agent network into the composite curing agent system, the rapid formation of an early dense microstructure can be simultaneously promoted while ensuring good workability of the slurry. This results in improved early strength, long-term stability, erosion resistance, and control of harmful ion leaching risk in the obtained cured body.

This invention provides a self-generating ulcer dressing, belonging to the field of medical device technology. The self-generating ulcer dressing comprises a self-generating layer and a conventional ulcer dressing. The conventional ulcer dressing includes a medicated layer and a protective layer, with the self-generating layer either independently between or integrated with both. The self-generating layer is composed of membrane materials such as polylactic acid, polarized cellulose dressing, and polyvinyl alcohol, either alone or in combination with other strongly electronegative biocompatible materials. It generates a Maxwell pulse electric field under external force, accelerating cell regeneration and tissue repair, and promoting ulcer healing. The self-generating layer can be combined with the medicated layer or the protective layer. The protective layer material can be selected from polyacrylic acid resin, diethyl phthalate, or hydroxypropyl methylcellulose, etc. The self-generating ulcer dressing can have a multi-layered or staggered structure, with layers connected by coating, mixing, or compression. The self-generating ulcer patch of the present invention has a flexible design and does not require an external power source. When the self-generating ulcer patch is continuously rubbed and pressed, the self-generating layer is subjected to continuous force to generate a Maxwell pulse electric field and a pulse field current, which can activate cells, promote blood circulation, and work synergistically with ulcer medication to accelerate cell regeneration and tissue repair, thereby achieving the effect of promoting ulcer wound healing.

This invention discloses a recycled roof grouting slurry for mines and its preparation method, relating to the field of reinforcement grouting slurry technology. Sodium silicate solution and calcium chloride are mixed and stirred evenly to obtain an additive. Clay and water are mixed and stirred until homogeneous. After the slurry is aged, a yellow mud slurry is obtained. Ordinary silicate cement, quicklime, the additive, and hydroxypropyl methylcellulose are added to the yellow mud slurry and stirred until homogeneous to obtain the recycled roof grouting slurry for mines. This invention uses waste clay from construction sites as the main raw material, reducing the amount of ordinary silicate cement used. This reduces costs while achieving resource reuse. Hydroxypropyl methylcellulose has a certain water retention capacity, which increases the viscosity of the grouting slurry and effectively binds fine particles in the original slurry, such as clay, thus improving the consolidation strength of the hardened grout.

This invention belongs to the field of polymer material modification technology, and relates to a method for preparing cellulose acetate composite fiber with traditional Chinese medicine efficacy. The method includes 85-92 parts cellulose acetate, 2-6 parts active microcapsules of traditional Chinese medicine, 4-8 parts environmentally friendly plasticizer, 0.3-1.2 parts dispersant, and 0.2-0.8 parts antioxidant. The active microcapsules use a mixed extract of rosemary, peppermint, artemisia, and arborvitae leaves as the core material and hydroxypropyl methylcellulose as the wall material, with a core-to-wall material weight ratio of 1:1.2-1.8. The rosemary and other traditional Chinese medicines are washed, dried, and pulverized according to a specified ratio, then extracted by low-temperature ultrasonication, concentrated, and dried to obtain the extract. This extract is then made into microcapsules, blended with the raw materials, melt-extruded, granulated, and shaped. This invention enables the composite material to possess both the excellent properties of cellulose acetate and the functions of traditional Chinese medicine, with long-lasting function and stable processing performance, making it suitable for large-scale production.