3440results about How to "Improve acid resistance" patented technology

An intragastric balloon and method of adding and / or removing fluid therefrom are disclosed. The intragastric balloon includes a shell, a grasping tab, and a self-sealing portion. A gastroscopic instrument which includes a grasping tool is inserted into the stomach of a patient and used to grasp the grasping tab located on the surface of the shell. Using the grasping tool, the intragastric balloon is securely fastened to the gastroscopic instrument. A filling instrument, such as a needle, is advanced through the self-sealing portion of the shell for the filling or deflating of the intragastric balloon. After inflation or deflation is complete, the filling instrument is then withdrawn from the balloon and the gastroscopic instrument withdrawn from the stomach.

The invention discloses a nanometer compound water-based heat insulation anticorrosion paint used for metal and a preparation method thereof. The raw materials of the paint consists of the following components: tap water, watercraft acrylic resin, rustproofing pigment, reflection pigment and filler, hollow micro-beads, watercraft nanometer size, anti-settling agent, wetting and dispersing agent A,wetting and dispersing agent B, film-forming assistant, defoaming agent, flatting agent, anti-flash rustproofing agent and thickening agent. Watercraft polyacrylic emulsion is styrene-crylic acid copolymerization emulsion, pure crylic acid polymerization emulsion or organic silicon-crylic acid copolymerization emulsion. The wetting and dispersing agent A is block macromolecule copolymer, multivalence carboxylate polymer and / or synthetic macromolecule copolymer, and the wetting and dispersing agent B is anion wetting agent and / or nonionic wetting agnet. The product contains no organic solvent,heavy metal and other harmful substances, is extremely excellent in environmental conservation, integrates the functions of anticorrosion and heat insulation as a whole and is simple and convenient for construction, safe in storage and stable in performance.

The invention relates to a lactobacillus plantarum strain having functions of effectively degrading nitrite and strongly producing acid and an application of the lactobacillus plantarum strain, and belongs to the technical field of bioengineering. The lactobacillus plantarum strain having the functions of effectively degrading nitrite and strongly producing acid is selected from conventional fermented pickled vegetables in Shenyang peasant families, wherein the strain is named FM-LP1-1, identified to be lactobacillus plantarum, and the strain is preserved in China General Microbiological Culture Collection Center with the preservation number of CGMCC No. 9488 on August 4, 2014. By taking FM-LP1-1 as a fermenting agent for fermenting vegetables, the content of nitrate in the fermented vegetable products is effectively reduced, the fermenting duration of the vegetables is shortened and the fermenting flavor of the vegetables is enhanced; and the strain disclosed by the invention is broad in application prospect.

The invention relates to a feed for early weaned piglets, which belongs to the field of the feed. Main ingredients of the feed comprise expanded corn, full-fat soybean, fat powder, steam fish meal, acidified whey powder, fermented soybean meal, a complex enzyme preparation, a micro-ecological preparation, amino acids, complex vitamins, complex trace elements and the like. The digestive physiological characteristics of the weaned piglets are fully considered on the selection and the processing of raw materials, thereby greatly improving the palatability and the digestion rate of the feed; simultaneously, through the synergistic compatibility of an egg yolk antibody, lactein, sodium humate and the complex micro-ecological preparation, the diarrhea rate of the weaned piglets is reduced, the effects are superior to those of adding antibiotics into the feed, and the feed is the green, environmentally-friendly and nuisanceless feed. An animal feeding experiment proves that the feeding effects are ideal, the palatability is good, the piglets after weaning are high in average feed intake, fast in daily weight gain and low in diarrhea rate, and the feed has a good promoting effect for growth and health conditions of the weaned piglets and can meet the demands of most of raisers at present.

The invention relates to a modified epoxide resin adhesive agent and its preparation process to overcome the disadvantage such as brittleness and bad temperature resistance of common epoxide resin adhesive agents, which comprises: mixing the epoxide resin (component A) modified by polyurethane prepolymer and curing agent (component B) produced by author in the proportion of between 10:1 to 1:1 to prepare the curing system of fire resistant, good toughness and large reaction, wherein the polyurethane prepolymer is polysiloxane polyurethane prepolymer capped by isocyanate groups which are produced by the reaction of hydroxy-terminated polysiloxane and diisocyanate in a definite proportion, then using the said polyurethane prepolymer to modified treat epoxide resin. The said curing agent produced by author is made of diamine, imidazolinium compounds, silane coupling agents, mineral filler and catalyst. The said modified epoxide resin adhesive agent can be cured in room temperature and has the good characteristics of oil resistant, water resistant, acid and alkali resistant and resistance to organic solvent, also can adhere to the damp face, oil face, metal, plastic, ceramic, hard rubber and wood and so on.

The invention discloses a shale gas acid fracturing drag reducer and a reparation method of the shale gas acid fracturing drag reducer. The preparation method comprises the following steps: mixing monomer acrylic acid and 2-acrylamide-2 methyl propane sulfonic acid, dissolving in water, subsequently adding acrylamide, and finally adding ethylenediamine tetraacetic acid disodium to prepare into a water phase; mixing and dissolving a compounded surfactant with base oil to form an oil phase; performing inverse emulsion polymerization on the oil phase and the water phase to prepare the shale gas acid fracturing drag reducer. As a great amount of acid resistance monomers are introduced into the drag reducer, the acid resistance of the dreg reducer is greatly improved; the dreg reducer is milk white emulsion in appearance, is high in stability, non-ignitable, non-explosive, safe to transport and store, rapid to dissolve in water and free of fisheye; the requirements of continuous blending in shale gas acid fracturing can be met; the resistance reduction rate of a dreg reducer solution with the mass percentage of 0.2% can be greater than 70%.

The invention discloses a method for preparing a low-carbon olefine catalyst by a loading iron-based synthetic gas, which comprises the following steps of: firstly carrying out surface modification on a silica gel carrier by using silica gel as a carrier, and then loading a metal auxiliary agent and an active component Fe by using an immersion method, wherein the surface modification method of the silica gel carrier comprises the following step of carrying out immersion treatment by using the acidic solution of sugar. After the silica gel carrier adopted is modified, the strong interaction between the carrier and the active component is overcome, and the activity and the selectivity of the catalyst are improved. The catalyst prepared by using the method is suitable for a reaction process of producing low-carbon olefines of ethylene, propylene, butane and the like by the synthetic gas.

The present invention provides a dresser for a chemical and mechanical polishing cloth wherein a bonding material for retaining diamond grit is not dissolved and contamination of chemical slurry caused by dissolving of metal or peeling-off of diamond grit is prevented from occurring. A sintered product constituting the dressing face 2a is obtained by mixing a bonding material 4 consisting of silicon and / or silicon alloy with diamond grit 3, and forming and sintering the mixture. A carbide film 5 generated by sintering silicon in the bonding material into diamond is formed on the surface of the diamond grit 3. Thereby, the diamond grit is firmly bonded with the bonding material, and the bonding material is not dissolved. As a result, the contamination of the chemical slurry or the peeling-off of the diamond grit is prevented.

The invention provides a lactobacillus helveticus microcapsule as well as the preparation and application thereof, pertaining to the embedding technology of lactobacillus helveticus and aiming at microencapsulating the lactobacillus helveticus so as to solve the problems of low embedding efficiency and embedding yield in single-layer or double-layer embedment. The technical proposal adopted by the invention is that isolated soy protein, microporous starch and sodium alginate are respectively taken as the first, the second and the third layers of wall materials for microencapsulation; the three-layer embedment is carried out to the lactobacillus helveticus for the first time, wherein, in the process of preparing bacterial suspension, an orthogonal optimization protective agent is adopted to improve the livability after freeze drying. The microcapsule of the invention has strong heat resistance and acid resistance, solves the inactivation problem caused by gastric acid, digestive enzyme and antibiotic, etc. to active bacillus, is capable of releasing when reaching large intestine, and balances intestinal flora. The reusability of fermented milk is good. The lactobacillus helveticus used by the invention enriches the variety of probiotic bacteria microcapsule and is a good dietary supplement.

The invention discloses a method for preparing acid- proof fracturing propping agent with red mud. The comprised raw materials and their weight proportion are as follows: red mud 20- 60%, aluminium-containing substance 20- 60%, barium- containing substance 5- 35%, plasticizing agent 5- 15%. The method comprises following steps: (1) putting red mud and aluminium- containing substance into ball grinding tank for grinding respectively; (2) adding barium- containing substance and plasticizing agent into material got in steps (1), feeding it into ball grinding tank for grinding; (3) preparing material got in step (2) into semi- product particle; (4) calcinating material got in step (3) for 1- 3 hours, getting acid- proof crack propping product. The invention develops new way for red mud application, and provides effective method for increasing acid- proof performance for crack propping agent.

The present invention provides a composition for use in forming an abrasion-resistant easy-to-clean coating on a substrate. The composition according to the invention includes a mixture of a fluorocarbon polymer component and an enamel-forming component. The enamel-forming component includes at least a first lead-free and cadmium-free glass frit. The first lead-free and cadmium-free glass frit includes from about 30% to about 50% P2O5, from about 15% to about 30% Al2O3, and from about 2% to about 40% X2O where X=Na and / or K. The present invention also provides a method of forming an abrasion-resistant easy-to-clean coating on a substrate. The method includes applying the composition according to the invention to a substrate and sintering the applied composition to fuse an abrasion-resistant easy-to-clean coating to the substrate. The method can be used to apply the composition to a variety of substrate materials such as metals, glass, ceramics, and stone, using a variety of application techniques such as wet spraying, screen printing, electrophoresis, dry electrostatic deposition, wet dipping, and flow coating.

The invention discloses a method for preparing a silicon-free or low-silicon acidproof ceramic fracturing propping agent, which comprises the following steps of: (1) preparing the following raw materials in percentage by weight: 30 to 95 percent of alumina, 5 to 70 percent of barium carbonate and 0 to 10 percent of sintering aid, wherein the sintering aid is one or more of titanium dioxide, boric acid, calcium carbonate, magnesium oxide and dolomite; (2) performing ball milling on the raw materials in the step (1) in a ball mill for 24 to 48 hours; (3) preparing the raw materials obtained in the step (2) into semi-finished product particles; and (4) sintering the semi-finished product particles obtained in the step (3) at the temperature of between 1,500 and 1,800 DEG C for 1 to 3 hours, and cooling to the room temperature. The method has simple process; the barium carbonate is decomposed at high temperature to generate barium oxide, and the barium oxide is fully reacted with alumina to generate stable barium aluminate; and the barium aluminate has strong acidproof performance and protects other components in the finished product against corrosion of acid liquor, so the acidproof performance of the finished product is greatly improved.

Lactobacillus plantarum having an anti-diabetic function and application thereof are disclosed, the strain is Lactobacillus plantarum NCU116, and the accession number is CGMCC 11885. The strain has a function to alleviate symptoms of diabetes, and the composition is in a form of food or a pharmaceutical composition. The present invention also discloses a method for screening and identification of the lactic acid bacteria strain as well as a method to achieve the anti-diabetic effect by regulating blood sugar, blood lipids and hormone levels and regulating metabolic pathways in the body. The daily-intake lactic acid bacteria or a composition thereof is used to replace a medicine to achieve the anti-diabetic effect; and the healthy daily-intake lactic acid bacteria or the composition thereof is free of toxic and side effects to human body is used as a new choice to alleviate the symptoms of diabetes.

Geopolymer composite materials having low coefficient of thermal expansion are disclosed. The materials are useful in high temperature applications due to their low coefficient of thermal expansion and high strength. Also disclosed is a boron modified water glass geopolymer composition that is compatible with ceramic particulate material such as cordierite and fused silica. The geopolymer composite may be extruded to form structures such as honeycomb monoliths, flow filters or used as a plugging or skinning cement and may be fired at temperatures at or below 1100° C. Both the structures and the cement have high green and fired strength, a low coefficient of thermal expansion, and good acid durability. The cost of manufacturing objects using the material of the present invention is substantially reduced, in comparison with typically production methods of cordierite based bodies, due to the substantially shortened firing times.

The invention relates to an expansion type fire-retardant coating which contains organic silicon resin, and particularly comprises the components in part by weight: 10-40 parts of resin, 10-40 parts of catalyst, 5-20 parts of charcoal forming agent, 5-20 parts of foaming agent, and 3-15 parts of flame retardant, wherein the resin is selected from one or more of epoxy resin, phenolic resin, and acrylic resin as well as organic silicon resin. According to the invention, the shortcoming that the traditional fire-retardant coating is poor in heat stability is overcome; the coating has the characteristics of good fireproofing heat-insulating property, good bonding force, high strength, capability of bearing high and low-temperature circulation influence, excellent water resistance, acid resistance and salt corrosion resistance of coating layer, difficult in falling, stability in storage, good decoration property, convenience for construction and the like; during combustion, no smog or little smog is generated; and the coating is particularly suitable to be used as a fire-resistant coating for ultra-thin steel structures, veneer type fire-retardant coating and cable fire-retardant coating.

The invention discloses an aluminum and aluminum alloy surface treatment method which is characterized by comprising steps as follows: water washing, degreasing treatment, water washing, pickling, water washing, alkali washing, deionized water washing, anodic oxidation, water washing, PTFE (polytetrafluoroethylene) treatment, and drying. According to the aluminum and aluminum alloy surface treatment method, an aluminum and aluminum alloy oxide film with good uniformity can be obtained, and the film is high in hardness, abrasion-resistant, corrosion-resistant and the like.

The invention discloses lactobacillus plantarum GLM101 and an application thereof in preparing a feed additive. The strain is preserved in the China General Microbiological Culture Collection Center (CGMCC) with the preservation number CGMCC No. 11156. The lactobacillus plantarum GLM101 has very strong inhibiting ability for escherichia coli, staphylococcus aureus, salmonella typhi, vibrio vulnificus and aeromonas hydrophila, and also has excellent acid-resisting and cholate-resisting abilities. The lactobacillus plantarum GLM101 can be used for adjusting the microecological balance inside the intestines of animals, has the action of enhancing the nonspecific immunity function to prevent diseases, and also can provide trophic factors, promote digestive absorption of nutrients, promote growth of animals, and improve the feed conversion ratio.

The invention discloses an organic silicon fire resistant antiseptic eroding paint, which is characterized by the following: comprising with 15-40% organic silicon resin and hardener, 15-60% thermostable filler, 0. 01-0. 5% dryer, 0. 05-0. 5% additive, 0. 1-5% coupling agent and 1-64% dissolvent; getting the product. This invention possesses simple craft good coating property and strong adhesive force.

The invention discloses an aqueous multi-functional crylic acid extinction resin and a preparation method thereof and belongs to the field of extinction type coatings. The preparation method of the aqueous multi-functional crylic acid extinction resin comprises the following steps: (1) preparing a crylic acid ester mixture monomer; (2) sufficiently mixing water, an emulsifier and a part of the crylic acid ester mixture monomer, heating to 70-90 DEG C, adding an initiator to react for 0.5-1 hour, dropwise adding the rest crylic acid ester mixture monomer within 3-5 hours, adding the rest initiator in different batches, performing heat preservation for 1-3 hours after the dropwise adding, cooling to 45 DEG C, sequentially adding modified silicon dioxide and an organic thermosetting polymethylurea resin with the particle size of 3.5mu m, uniformly stirring, cooling down and discharging so as to obtain the aqueous multi-functional crylic acid extinction resin. The aqueous multi-functional crylic acid extinction resin prepared by the preparation method disclosed by the invention is high in extinction efficiency, excellent in water resistance, acid resistance and alkali resistance, and good in abrasion resistance property.

The invention relates to lactobacillus plantarum and application thereof, specifically to novel lactobacillus plantarum LP45 (YMC1005) with an accession number of CGMCC No. 8072. The invention further relates to application of the lactobacillus plantarum LP45 in reduction of cholesterol, improvement of immunity and inhibition of harmful bacteria to intestinal tracts.

A coating composition and a cooking device and / or cooking receptacle coated with the coating composition are described. The coating composition includes 10 to 30 wt. % of SiO2, 10 to 30 wt. % of P2O5, 10 to 30 wt. % of Al2O3, 1 to 20 wt. % of TiO2, 7 to 15 wt. % of Na2O, 7 to 15 wt. % of K2O, 5 to 10 wt. % of ZrO2, 2 to 5 wt. % of BaO, 2 to 5 wt. % of B2O3, 1 to 2 wt. % of MnO2, and an adhesion enhancer. The coating composition provides favorable thermal resistance, acid resistance and mechanical properties, such that a cooking device and / or receptacle coated with the coating composition may be easily cleaned at a relatively low temperature.

The invention provides an anticorrosive material for a chimney, a flue and other containers and pipelines and an anticorrosive construction process. The construction method of the anticorrosive material comprises the following steps: using crude rubber with higher fluorine content as a raw material, then adding curing agent, stabilizer, special stuffing and other components, and mixing to form precuring gross rubber; dissolving the rubber by using low-molecular weight esters and ketones as the solvent to form a putty type rubber paste; and finally, adding special additives, uniformly mixing, coating to the inner walls of a chimney, a flue and a chemical container, and curing into the polymerized fluororubber organic lining under the room-temperature condition. The material can be independently used as the anticorrosive material, and can also be used for protecting common foam glass bricks (ceramic bricks) and adhesive for anticorrosive purpose in the domestic chimney (flue) at present. The invention well solves the technical problems of fluororubber room-temperature curing and difficult anticorrosive construction, can be used in a high-temperature environment of more than 230 DEG C, and can endure high-concentration sulfuric acid, nitric acid, hydrochloric acid, phosphoric acid, hydrofluoric acid, corresponding salts and a mixture thereof. The anticorrosive lining material is economically affordable, has extremely high comprehensive anticorrosive properties such as temperature resistance, acid resistance and the like, and is applicable to the anticorrosive treatment of a cured chimney.

The invention relates to an activated carbon catalyst used for treating refractory organic wastewater with a Fenton-like technology, and preparation and application thereof. The catalyst is prepared by using an isopyknic impregnation method with transition metals - Cu, Fe, Ni and Mn or rare earth elements as active components and formed activated carbon as a carrier; and the catalyst is mainly used for treating refractory organic wastewater, or wastewater failing to achieve standards after treated by using a biochemical method. The activated carbon catalyst provided by the invention treats the wastewater at room temperature without adjustment of the pH value of the wastewater, wherein the concentration ratio of H2O2 (mg / L) to COD (mg / L) is 0.3 to 1.5, and airspeed is 0.5 to 2.0 h<-1>. According to the invention, COD removal rate is greater than 50%; BOD5 / COD indexes of the wastewater before and after treatment is significantly enhanced; biodegradability of the wastewater is improved; and the catalyst is capable of continuously operating for more than 700 hours with unchanged catalytic activity, and can be popularized in industrial application of treating industrial wastewater, specifically the refractory organic wastewater, by using the Fenton-like method.

A cement composition for use in acidic environment containing liquid alkali silicate, vitreous silicate setting agent, lime containing material and inert filler and building materials made therefrom as well as the method of making such building materials. The liquid alkali silicate may include sodium silicate or potassium silicate. The vitreous silicate setting agent may include soda-lime glass powder or coal fly ash. The lime containing material refers to the materials containing more than 20% lime and may include quicklime, hydrated lime, Portland cement, blast furnace slag or steel slag. The inert fillers include ground quartz, ground ceramic, and / or clay.

The invention relates to organic silicon resin, in particular to a method for preparing hydroxyl-terminated hyperbranched polyester modified organic silicon resin. The method comprises the following steps of: adding 40 to 60 weight percent of hydroxyl-terminated hyperbranched polyester, 40 to 60 weight percent of organic silicon resin and a cross linking catalyst into a reactor; after heating the mixture for 1 to 3 hours at the temperature of 110 to 120 DEG C, warming to the temperature of 150 to 180 DEG C and heating for 1 to 3 hours; and finally, reducing the temperature to the room temperature and adding an organic solvent to regulate the solid content to the range of 60 to 70 percent so as to obtain the hydroxyl-terminated hyperbranched polyester modified organic silicon resin. The method combines the advantages of the hydroxyl-terminated hyperbranched polyester with the organic silicon resin and excellent heat resistance, low surface energy, excellent boiling resistance and excellent salt fog resistance are obtained. The resin prepared by the method disclosed by the invention can be used for preparing a coating with high temperature resistance and low surface energy.

The invention discloses a nonionic waterborne epoxy resin emulsion, a nonionic waterborne epoxy curing agent, a preparation method of the nonionic waterborne epoxy resin emulsion and the nonionic waterborne epoxy curing agent and waterborne epoxy resin varnish. Polyether amine has reaction with epoxy resin to form a nonionic emulsifier, and then the nonionic waterborne epoxy resin emulsion is prepared through a phase inversion method; the nonionic waterborne epoxy curing agent matched with the nonionic waterborne epoxy resin emulsion during use is prepared; the prepared waterborne epoxy resin varnish comprises a component A and a component B, the component A is the nonionic waterborne epoxy resin emulsion and a defoaming agent, and the component B is the nonionic waterborne epoxy curing agent. The varnish film of the prepared waterborne epoxy resin varnish has comprehensive performance such as good water resistance, good acid resistance, good alkali resistance and high hardness.

The invention discloses a light-curing adhesive and in particular relates to an ultraviolet-curing adhesive. The light-curing adhesive comprises the following components in percentage by mass: 10%-75% of matrix resin, 5%-50% of auxiliary resin, 10%-70% of activated monomer of acrylate, allyl compound or vinyl compound, 5%-15% of adhesion accelerator, 1%-10% of photoinitiator and 0.5-10% of auxiliary agent. The light-curing adhesive provided by the invention has fast curing capability, high bonding strength and low internal stress; an obtained cured layer is soft and has excellent hydrofluoric acid resistance.

This invention relates to a dope combination. The film coating it formed is amorphous gelatinous substance, base unit is three-dimensional network formed by connection of silicon - oxygen tetrahedron and aluminium - oxygen tetrahedron. end product takes electrovalent bond and covalent bond as main, vander waas bond as complement, possess linkage structure of organic heavy polymer, and double property of inorganic polymer and organic polymer. The unique performance supple the insufficiency of organic high molecular polymer. It possesses favorable performance of acid-proof, alkali-proof, impervious, antifreeze, seawater resistance and high temperature resistance.