36results about How to "Low dosage" patented technology

The invention discloses a polymer-based electromagnetic shielding material based on carbon fiber and graphene and a preparation method of the polymer-based electromagnetic shielding material. The polymer-based electromagnetic shielding material is prepared by use of the following steps: firstly, acidizing the carbon fiber and performing ultrasonic dispersion on the acidized carbon fiber and the graphene in a solution containing a coupling agent to prepare an interpenetrating network structure; secondly, adding the solution of a polymer by use of a solvent mixing method and stirring and drying to obtain mixture powder; and finally, evenly mixing the mixture powder with an antioxidant, a compatilizer or other auxiliaries and then extruding and granulating by use of a twin-screw extruder. According to the polymer-based electromagnetic shielding material based on the carbon fiber and the graphene, an intertwined network structure of the carbon fiber and the graphene are kept inside the polymer so that an efficient power transmission and network can be formed in the matrix; the prepared electromagnetic shielding material has a good electromagnetic shielding effect, and also has the characteristic of good comprehensive mechanical properties and thermal conductivity. The polymer-based electromagnetic shielding material has the advantage of expanding the application of the carbon fiber and the graphene in the field of the electromagnetic shielding materials.

The invention relates to a preparation method of an antibacterial preservative for a polycarboxylate-type water reducing agent. The preparation method comprises the following specific steps: carrying out a free radical polymerization reaction on isopentenol polyoxyethylene ether, alkyl glycine betaine and dimethyl fumarate under the action of an initiator, a reducing agent and a chain transfer agent; adding fluconazole in a reaction process to prepare the antibacterial preservative. The preservative is formed through carrying out free radical polymerization on an antibacterial preservation monomer and polyoxyethylene ether, has a molecular structure which is similar and compatible with the polycarboxylate-type water reducing agent and belongs to a macromolecular liquid polymer; the antibacterial preservative has remarkable mildew-proof and sterilization effects for long-period storage of the polycarboxylate-type water reducing agent; the antibacterial preservative has no chloride ions and good compatibility, and is green and environmentally friendly; a water reducing performance of the polycarboxylate-type water reducing agent can be free of influences for 15 months.

The invention discloses a low-dosage high-early-strength alkali-free liquid accelerator and a preparation method thereof. The alkali-free liquid accelerator is prepared from the following raw materials: 1, an alkali-free liquid accelerator; 50%-60% of modified aluminum sulfate, 2%-4% of a fluorine-aluminum complex solution, 3%-6% of an organic cosolvent, 1%-2% of a pH regulator, 0.5%-1.5% of an inorganic stabilizer, 0.3%-0.5% of a viscosity regulator, 4%-6% of a composite early strength agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. The invention also provides a preparation method of the alkali-free liquid accelerator. The preparation process of the alkali-free liquid accelerator is simple; hydrofluoric acid-free process, alkali-free, chlorine-free, rust-free steel bar, non-polluting environment. Meanwhile, when the mixing amount of the alkali-free liquid accelerator is 5%-6%, the technical requirements of GB/T35159-2017 on the alkali-free accelerator can be met, the one-day compressive strength is larger than or equal to 13.0 MPa, and the alkali-free liquid accelerator has the advantages of being low in mixing amount, good in stability, high in early strength and large in later strength retention rate.

The invention belongs to the technical field of concrete additives in building materials and provides a polycarboxylate-type water reducing agent mother liquid, a preparation method and an application thereof. The polycarboxylate-type water reducing agent mother liquid is prepared from unsaturated polyoxyethylene ether, a chain transfer agent, unsaturated acid and/or unsaturated acid derivatives, an initiator and water. The polycarboxylate-type water reducing agent mother liquid is prepared through a one-step method. A water reducing agent is compounded from the mother liquid, preferably-selected slump-retaining components, a defoamer and water. The water reducing agent prepared from the mother liquid is low in doping quantity, is high in water reducing efficiency, is good in water retention and slump retaining effects and has good cement adaptability. The production process is simple, is less in investment and device and is low in cost. The polycarboxylate-type water reducing agent has excellent slump degree keeping capability, can significantly improve disintegration and bleeding in concrete, can improve operation performance, mechanical performance and durability of concrete, thereby improving building engineering quality and prolonging service life of buildings.

This invention relates to the field of concrete complex super-retarding water reducers. The super-retarding water reducer in this invention has a mass-fraction composition as follows: 0.5~25% ethylene polyamine alkyl phosphonic acid or its salt, 0.5~20% phosphonobutane tricarboxylic acid, 20~50% water reducers, 0~ 0.5% sodium dodecyl sulphates and water as the rest. There are two preparation methods in this invention, one is that, components mentioned above are directly mixed with water reducers at those mass fractions so as to form super-retarding water reducers; the other is that, super-retarding components are added during water reducer preparation. The super-retarding water reducers in this invention are compatible with different kinds of water reducers. They perform extraordinary retarding activities without any side effect.

The present invention encompasses novel antibodies and fragments thereof which immunospecifically bind to one or more RSV antigens and compositions comprising said antibodies and antibody fragments. The present invention encompasses methods preventing respiratory syncytial virus (RSV) infection in a human, comprising administering to said human a prophylactically effective amount of one or more antibodies or fragments thereof that immunospecifically bind to one or more RSV antigens, wherein a certain serum titer of said antibodies or antibody fragments is achieved in said human subject. The present invention also encompasses methods for treating or ameliorating symptoms associated with a RSV infection in a human, comprising administering to said human a therapeutically effective amount of one or more antibodies or fragments thereof that immunospecifically bind to one or more RSV antigens, wherein a certain serum titer of said antibodies or antibody fragments is achieved in said human subject. The present invention further encompasses compositions comprising antibodies or fragments thereof that immunospecifically bind to a RSV antigen, and methods using said compositions for detection or diagnosis a RSV infection

The invention relates to methods and compositions for promoting cognitive function and/or treating cognitive function disorders and impairments. In particular the methods are accomplished by administering to a subject CI-994 or dinaline or a pharmaceutically acceptable salt, ester, prodrug or metabolite thereof.

The invention discloses a high-performance liquid accelerator composition and a preparation method thereof. The high-performance liquid accelerator composition comprises the following raw materials by weight percentage: 40-60% of inorganic salt, 10-30% of a rheological agent, 5-10% of polyol, 1-5% of inorganic acid, 1-5% of a flocculating agent, 0.5-1% of an antifoaming agent, and the balance of water; wherein the weight percentage sum of the above raw materials is 100%. The high-performance liquid accelerator has the advantages of low doping amount, non alkali, non chlorine, good storage stability, no crystallization and precipitation, low viscosity, and no strength loss at anaphase, and overcomes the disadvantages of easy layering and deposition, large viscosity and strong corrosivity in the current liquid accelerators.

The invention relates to a comb-shaped grafted copolymer cement dispersing agent. The comb-shaped grafted copolymer cement dispersing agent has the advantages of simple production technology, low mixing amount and high adaptability. The comb-shaped grafted copolymer cement dispersing agent is prepared through the following steps: preparing the comb-shaped grafted copolymer cement dispersing agent through the free radical copolymerization reaction of monomers A shown by a general formula (1) and monomers B shown by a general formula (2) in an aqueous medium; and setting the mol ratio of A to B to be 1:2 to 1:10. Amide nonionic base groups are introduced into the backbone of the grafted copolymer and are taken as the absorption base groups, thereby reducing the sensitivity of the grafted copolymer absorption characteristic to the variety and content of ions in the cement slurry, and consequently improving the adaptability of the grafted copolymer dispersing agent in the building engineering. The comb-shaped grafted copolymer cement dispersing agent has the advantages of simple production process, low mixing amount and high cement adaptability.

The invention provides a preparation method of polycarboxylic acid nanoparticles. The polycarboxylic acid nanoparticles are formed through copolymerizing a hydrophilic monomer unsaturated acid, a hydrophilic monomer polyethylene glycol monomethyl ether methacrylate, a hydrophilic monomer unsaturated sulfonate and a hydrophobic monomer styrene or (meth)acrylate, and have a linear microstructure in water. The water reducer applied to concrete has the advantages of low proportion, high water reduction, long slump retaining time and excellent mud resistance; and the polycarboxylic acids particles solves the water reducing and slump retaining problems of concrete without a super water reducer or an extra sacrificing agent when the mud content of aggregates is high, so the water reducer has good economic benefit.

The invention provides a comb-shaped graft copolymer cement dispersant, which has the advantages of low mixing amount and strong temperature adaptability. The invention also provides a composite cement dispersant which comprises the comb-shaped graft copolymer cement dispersant. The comb-shaped graft copolymer cement dispersant is prepared through radical copolyreaction between unsaturated monomerand aqueous medium; the unsaturated monomer comprises unsaturated polyether macromer A and unsaturated phosphonate monomer B, wherein the unsaturated polyether macromer A is presented by a general formula (1), and the unsaturated phosphonate monomer B is presented by a general formula (2) or a general formula (3). The composite cement dispersant comprises the comb-shaped graft copolymer cement dispersant, and also comprises polycarboxylic acid admixture shown by a general formula (4), a general formula (5), a general formula (6) or a general formula (7). In the invention, water is used as medium, and a simple copolymerization technology is adopted for obtaining the comb-shaped graft copolymer cement dispersant with low mixing amount. The dispersibility of the comb-shaped graft copolymer cement dispersant is little influenced by the concentration of SO4<2-> and the temperature so that the comb-shaped graft copolymer cement dispersant has favorable adaptability for cement and environment.

The invention provides a liquid cement additive for reducing the content of water-soluble Cr<6+> in cement. The liquid cement additive has good Cr<6+> elimination ability, and also has the advantages of reasonable price, small mixing amount, and small influences on the performances of cement. The liquid cement additive comprises, by mass, 5-10% of sodium borohydride, 5-10% of sodium sulfite, 5-10% of sodium nitrite, 5-10% of sodium formate, 1-5% of polyglycerol, 0-15% of alcohol amine, 0.5-1% of NaOH, and the balance of water, wherein the alcohol amine is at least one of triethanolamine, triisopropanolamine, diethanol isopropanolamine and methyldiethanolamine, and the pH value of the liquid cement additive is 10-14. The liquid cement additive has good Cr<6+> elimination ability, and has the advantages of reasonable price, small mixing amount, and small influences on the performances (such as water requirement of normal consistency and intensity) of cement.

The invention discloses a cement kiln fuel coal combustion improver which is prepared from the following raw materials in percentage by mass: 35 to 50 percent of an oxygen producer, 2 to 5 percent of a catalyst, 5 to 8 percent of a sulfur fixing agent, 35 to 48 percent of a combustion improver and 1 to 3 percent of a dispersant, wherein the total percent is equal to 100, and the dispersant is polycarboxylate. The macromolecular dispersant with high chemical stability is used; the cement kiln fuel coal combustion improver does not contain halogen ions of corrosive equipment, can increase the burn-off rate of fuel coal, reduce the carbon residual rate of raw coal and effectively fix sulfur, does not contain elements harmful to a clinker combustion system, is high in safety, cannot be automatically combusted, and is nontoxic and corrosion-free; experimental operation is simple and convenient; the adding amount of the cement kiln fuel coal combustion improver is lower than that of a common fuel coal combustion improver at the same level; the raw materials are low in cost, and the cement kiln fuel coal combustion improver has an extremely high application prospect and can really achieve energy conservation, discharging reduction, environmental protection and pollution prevention.

The invention discloses a preparation method of a cement grinding aid reinforcing agent, which comprises the following steps: adding first formaldehyde to urea in water in the presence of a catalyst; condensing the product of the addition reaction, sodium sulfanilate and a second formaldehyde; and obtaining the cement grinding aid reinforcing agent. Designed on the basis of a molecular structure,the preparation method provided by the invention bonds reinforcing and grinding aiding active functional groups into a molecular chain and synthesizes the homogenous material which is insusceptible to temperature, pH value and the like and has stable performance by chemical reactions. Experiment results indicate the method does not need a triethanolamine raw material and that the prepared cement grinding aid reinforcing agent is doped in small amount and has obvious grinding aiding function and stable performance.

The invention discloses a complex organic grinding aid for converter heat-stewed steel slag, and preparation and usage methods of the grinding aid. The grinding aid is prepared from the following raw materials in parts by mass: 20-40 parts of crude glycerine, 5-10 parts of dipropylene glycol, 2-10 parts of tripropylene glycol, 3-8 parts of triethanolamine borate, 5-10 parts of N-methyl diethanol amine and 30-70 parts of water; the preparation method comprises the following steps: according to the proportions, firstly dissolving triethanolamine borate into water, then sequentially mixing the dipropylene glycol, tripropylene glycol and N-methyl diethanol amine, then adding crude glycerine, and evenly stirring, to obtain the grinding aid; in use, the mixing quantity is 0.03%-0.06% of the mass of the converter heat-stewed steel slag. The complex organic grinding aid has strong adaptability to the converter heat-stewed steel slag, the grinding effect is obvious, the preparation method is simple, the performances are stable, the usage mixing quantity is low, the comprehensive effect is excellent, the cost of the grinding aid is low as a great amount of industrial byproduct crude glycerine is used, so that the grinding aid has wide application prospects.

The invention relates to an oyster attachment substrate technology, in particular to a cement concrete oyster attachment substrate with a rough surface and a preparation method, and belongs to the crossing field of marine sessile organisms and marine concrete. The attachment substrate comprises the following components: a cementing material, a light coarse aggregate, a light fine aggregate, water,dark pigment, biological calcium powder, calcium carbonate powder, trace elements, chopped fibers and a superplasticizer. According to the invention, dilute acid modification and composite grinding technologies are adopted; the inducibility of bovine bone meal is fully exerted, the mixing amount of the bovine bone meal is greatly reduced, anti-corrosion treatment and modification are carried out,a composite inducer with the bovine bone meal as the main component is achieved, the mixing amount is small, the strength and permeability of concrete are hardly affected, meanwhile, the oyster larvaadhesion capacity is very high, and the mildewing problem of the concrete is solved. Compared with concrete without an inducer, the concrete doped with the inducer has the advantage that the attachment number of oyster larvae is obviously increased.

The invention discloses an ultra-high efficiency polycarboxylate water reducer and a preparation method thereof. The preparation method of the ultra-high efficiency polycarboxylate water reducer is characterized in that methoxypolyethylene glycol (with a constitutional formula HO-(CH2-CH2)n-CH3, wherein n is in a range of 20 to 45), acrylic acid, etc. are utilized as raw materials to synthesize esterified macromers and then acrylic acid, the esterified macromers, acrylamide, sodium alkyl sulfonate, etc. undergo a copolymerization reaction in the presence of ammonium persulfate as an initiator. The ultra-high efficiency polycarboxylate water reducer of the invention has the advantages of simple processes, no pollution, low contents of additives, high water reducing rate, good adaptability for various cements, high strength, etc.

The invention discloses a concrete additive capable of resisting microbiological corrosion of concrete. The concrete additive is composed of cuprous oxide, nitrate and metal phthalocyanine MPc according to a weight ratio of 1-1.2: 1-1.2: 1-1.2, wherein M is Fe, Co, Ni, Cu or Zn. When added into concrete, the additive has the advantages of a small doping amount, good dispersibility and capacity of effectively inhibiting or reducing generation of biological sulfuric acid for a long time and is a high-efficiency concrete additive capable of preventing a microbiological corrosion effect on the concrete.

The invention discloses a concrete repairing material. The concrete repairing material is prepared from the following components in percentage by mass: 40 to 50 percent of ultrafine cement, 2 to 4 percent of micro-silicon powder, 40 to 45 percent of redispersible latex powder, 4 to 6 percent of Huaqiansu (special master batch for a grouting material), 0.05 to 0.1 percent of polyvinyl alcohol 2488,0.2 to 0.4 percent of hydroxypropyl methylcellulose, 0.05 to 0.2 percent of polyacrylamide, 0.1 to 0.5 percent of ammonium ferrous sulfate, 2 to 4 percent of tung oil and 0.2 to 0.5 percent of methylphenylcyclotrisiloxane. According to the concrete repairing material disclosed by the invention, the ammonium ferrous sulfate, the tung oil, the methylphenylcyclotrisiloxane, the ultrafine cement, theredispersible latex powder and other raw materials are mixed, so that the problems of an existing concrete repairing material that the quality cannot be ensured, the bonding strength with a previousconcrete bonding surface is poor, a whole block is easy to peel off and the like can be solved.

The invention provides an alkyl acrylate modified high-adaptability polycarboxylic acid water reducing agent and a preparation method. The polycarboxylic acid water reducing agent contains the following components in parts by weight beside water: 340-350 parts of a polyether macromonomer, 3.0-6.0 parts of sodium hypophosphite, 0.5-3.5 parts of hydrogen peroxide, 1.0-2.0 parts of ammonium persulfate, 101-123.5 parts of an initiator, 96-132 parts of micromonomer solution, 2.5-3.5 parts of alkyl acrylate and 10-25 parts of industrial liquid alkali. The preparation method comprises the following steps: 1, charging for the first time; 2, charging for the second time; 3, adding alkyl acrylate; and 4, preparing a finished product. The water reducing agent provided by the invention has the advantages that a long-chain ester crosslinking agent and a cation unsaturated monomer are introduced into a molecular structure of the water reducing agent, so that the polycarboxylic acid water reducing agent has good slow release and mud resistance effects; and the water reducing agent is low in mixing amount and high in water reducing rate and has excellent slump retaining capability.

The invention relates to a technology for inducing adhesion of marine attaching organisms, particularly to environmentally-friendly concrete for inducing adhesion of marine attaching organisms, and apreparation method thereof, and belongs to the field of crossing of marine attaching organisms and marine concrete. The environmentally-friendly concrete comprises the following components: a cementing material, gravels, sand, water, a dark pigment, biological calcium powder, biological calcium carbonate particles, carbonate and a superplasticizer. According to the invention, rapid construction ofengineering can be realized, and the environmentally-friendlyconcrete has high impermeability and high corrosion resistance, especially has high sulfate corrosion resistance, and has significant advantages in ocean engineering and engineering needing rapid repair.

The invention discloses a concrete viscosity reducer. The concrete viscosity reducer is prepared from components in parts by weight as follows: 15-22 parts of methacrylamide, 3-8 parts of sodium thiosulfate, 1-5 parts of a stabilizer, 2-3 parts of a retarder, 4-8 parts of maleic anhydride, 0.5-1 part of sodium dodecyl benzene sulfonate, 5-8 parts of bentonite and 10-12 parts of water. The concreteviscosity reducer has low admixing amount, good compatibility and stability.

The invention discloses a pumping agentfor blowing silt solidified soil and a preparation method thereof. The provided pumping agent is compounded by lignin sulfonate, sulfonated tannin extract, sodium gluconate, polyethylene wax, polyacrylamide, talc and sodium carbonate. The weight part of each component is: 30 to 35 parts of the lignin sulfonate, 25 to 35 parts of the sulfonated tannin extract,2 to 4 parts of the sodium gluconate, 3 to 4 parts of the polyethylene wax, 1 to 2 parts of the polyacrylamide, 30 to 35 parts of the talc and 0.5 to 1 parts of the sodium carbonate. The pumping agent for hydraulic reclamation of silt solidified soil provided by the invention has the advantages of low addition amount, simple adding process and good environmental protection, and the addition of the pumping agent can significantly improve the fluidity, lubricity and stability of the fresh silt solidified soil, makes the low-water content fresh silt solidified soil (water content of 100 percentto 150 percent) to maintain good fluidity within 2h, ensures the late strength of the solidified soil and prolongs the pumpable time of the silt solidified soil, which helps to improve the efficiencyand quality of silt solidified soil hydraulic reclamation construction, and has obvious technical, economic and environmental advantages.

The invention relates to a reduction type polycarboxylic acid water reducer as well as a preparation method and application thereof. The water reducer is prepared from the following raw materials: an unsaturated polyether macromonomer, an unsaturated acid monomer and a reduction type functional monomer, and further comprises an initiator, a chain transfer agent and deionized water, wherein the molar ratio of the unsaturated polyether macromonomer to the unsaturated acid monomer to the reduction type functional monomer is 1: (4-6): (2-5). Isopentenyl polyoxyethylene ether, the unsaturated acid monomer, the reduction type functional monomer, the chain transfer agent, the initiator and the deionized water are adopted, and the polycarboxylic acid water reducer with high water-reducing rate and excellent shrinkage-reducing performance is prepared by a free radical copolymerization method through molecular structure design. The water reducer is used for reducing the shrinkage rate of a cementing material, and the mixing amount of the water reducer in the cementing material is 0.1-0.2% of the mass of the cementing material. Compared with the prior art, the reduction type polycarboxylic acid water reducer has the advantages of low doping amount, excellent reduction effect, simple synthesis process, energy saving, environmental protection and the like.

The invention discloses a preparation method of a hexavalent chromium reducing agent for nano-loaded cement, and belongs to the technical field of preparation of building materials. The method comprises the following specific steps: sequentially adding a certain amount of an antimony compound, organic alkali and a carrier into a glass flask, stirring for a certain time at a certain temperature, and performing standing; and carrying out suction filtration on the obtained precipitate, respectively washing with deionized water and absolute ethyl alcohol, and drying at a certain temperature to obtain the hexavalent chromium reducing agent for the nano-loaded cement. The hexavalent chromium reducing agent prepared by the invention has the advantages of low doping amount, high reduction efficiency, no negative influence on cement-related properties and the like, and the method is simple and easy to operate and has industrial popularization value.

The present invention discloses salts of a Compound 1:

useful in the prophylaxis and/or treatment of inflammatory conditions, autoimmune diseases, proliferative diseases, allergy, transplant rejection, diseases involving degradation and/or disruption of cartilage homeostasis, congenital cartilage malformations, and/or diseases associated with hypersecretion of IL6 or interferons.

The invention discloses a burning-free and steaming-free brick microcrystalline assistant and a preparation method thereof, and belongs to the technical field of building materials. The burning-free and steaming-free brick microcrystalline assistant is prepared from the following raw materials in percentage by weight: 18-30% of saturated fatty acid, 5-12% of organic tertiary amine, 0.25-0.35% of chloride, 0.15-0.75% of inorganic alkali, and the balance of inorganic acid salt. According to the burning-free and steaming-free brick microcrystalline assistant and the preparation method thereof, the quality of burning-free and steaming-free bricks prepared by using the burning-free and steaming-free brick microcrystalline assistant can be significantly improved, and thus the burning-free and steaming-free bricks have the characteristics of the low admixture amount, high-efficiency activity excitation, the good process performance, the good machine shaping performance, the good plasticity, the high early strength, the low water absorption and excellent freeze-thaw resistance; and a more effective solidification technology for large-scale comprehensive utilization of industrial waste residue and sand is provided, broad market prospects are achieved in manufacturing of the building materials, and the very important significance for saving arable land, reducing environmental pollution,turning waste into treasure and recycling resources is achieved.

The invention discloses a particle type phosphonic acid-based super plasticizer, and a preparation method and application thereof. The particle type phosphate polymer is composed of polymer particles and water, the polymer particle is a core-shell structure nanoparticle formed by self-assembling polymers rich in phosphonic acid groups, carboxylic acid groups, phenyl groups and ether groups in water, a core layer of the polymer particle is composed of a hydrophobic aromatic polymer rich in phosphonic acid groups, and a shell layer of the polymer particle is a hydrophilic polycarboxylic acid comb-shaped polymer. The superplasticizer is good in water reducing performance, the slump retaining performance of the superplasticizer is far better than that of a common polycarboxylic acid superplasticizer, the mixing amount of the superplasticizer can be effectively reduced when the superplasticizer is applied to actual engineering, and cost is saved; a one-pot method is adopted in the preparation process, efficiency is high, time is short, no organic solvent is used, environment friendliness is achieved, and large-scale production is easy to achieve; compared with the conventional polycarboxylic acid superplasticizer, the superplasticizer disclosed by the invention can keep the initial and later fluidity of concrete at an excellent level under the condition of a relatively low mixing amount.