24results about How to "Strong cohesion" patented technology

The invention discloses quartz sand for fracturing and a preparation method thereof, and relates to the technical field of quartz sand for fracturing. The quartz sand for fracturing comprises the following raw materials in parts by weight: 50 parts of quartz sand and 5-8 parts of an organic silicon modified epoxy resin coating agent. The preparation method comprises the following steps: carrying out a reaction on PEG800 and 2, 6-toluene diisocyanate to prepare a transparent colloidal solid, carrying out a reaction on the transparent colloidal solid and bisphenol A epoxy resin to prepare an intermediate, and carrying out a reaction on the intermediate and aminopropyl methyl polysiloxane to prepare the organosilicon modified epoxy resin coating agent. The prepared quartz sand for fracturing has high sphericity, low density and high flow conductivity.

The invention provides a synthesis method of a chloride-free cationic rosin size emulsifier, which comprises the following steps: adding water to dilute dimethyl diallyl ammonium chloride, acrylamide and methacryloyloxyethyl trimethyl ammonium chloride according to a certain proportion to prepare a monomer mixed solution; the monomer mixed solution and the initiator solution are simultaneously pumped into a first microchannel reactor for polymerization reaction, the reaction temperature is 60-100 DEG C, the pressure is 0.2-1.4 Mpa, the retention time is 0.5-3 min, and a cationic polymer is obtained; and simultaneously pumping the cationic polymer and glyoxal into the second microchannel reactor for continuous reaction at the reaction temperature of 10-20 DEG C under the pressure of 2-4.0 Mpa for 0.5-3 minutes. The reaction time is greatly shortened by adopting the microchannel reactor, the method is suitable for industrial production, the synthesized chloride-free cationic rosin size emulsifier is safe, non-toxic, easy to dissolve in water, strong in cohesion, good in hydrolytic stability and free of gelling in 80 days, and rosin emulsion prepared by utilizing the cationic emulsifier is fine in granularity, good in stability and free of chloropropanol.

The invention discloses a high-strength ecological environment-friendly water permeable brick and a preparation method thereof, and relates to the technical field of water permeable bricks. The ecological environment-friendly water permeable brick is prepared from the following raw materials in parts by weight: 80 to 100 parts of quartz sand, 10 to 15 parts of cement, 30 to 50 parts of deionized water, 10 to 12 parts of filler, 2 to 5 parts of defoaming agent and 5 to 10 parts of adhesive. The preparation method comprises the following steps: carrying out a reaction on urotropine and tromethamine to prepare a first-generation polymer, then carrying out a reaction on the first-generation polymer and isocyanate-2-chloro-6-methyl phenyl ester to prepare an intermediate 1, and then carrying out a reaction on the intermediate 1 and bisphenol A epoxy resin to prepare an intermediate 2; finally, gamma-aminopropyl triethoxy silane is grafted to the intermediate 2, and the adhesive is prepared. The prepared ecological environment-friendly water permeable brick has good mechanical strength, water permeability and wear resistance.

The invention provides a cigarette soft package hardened packaging hot melt adhesive and a preparation method thereof, the cigarette soft package hardened packaging hot melt adhesive is mainly prepared by reaction of hot melt adhesive base resin and polyurethane hot melt adhesive prepolymer, the melt viscosity of the hot melt adhesive at 150 DEG C is 500-1000 mPa.S, and the Tg is 60-80 DEG C; the hot melt adhesive is prepared from the following main raw materials in percentage by weight: 20-50% of base resin, 10-30% of polyurethane hot melt adhesive prepolymer, 30-60% of tackifying resin, 0-20% of viscosity modifier, 1-5% of compatilizer, antioxidant and base material wetting agent. The polyurethane hot melt adhesive prepolymer is mainly prepared from raw materials such as polyether polyol, polyester polyol and isocyanate according to the weight ratio of (20 to 40): (15 to 30): (15 to 30); the polyester polyol is not easy to crystallize and has low polarity. The hot melt adhesive can meet the requirements of the hot melt adhesive for hardening packaging of soft packages for cigarettes.

The invention discloses a quartz sand proppant for fracturing and a preparation method thereof, and relates to the technical field of quartz sand proppants. The proppant comprises the following raw materials in parts by weight: 25-50 parts of quartz sand and 5 parts of a modified epoxy resin coating agent. A first-generation polymer is prepared through the reaction of urotropine and tromethamine, then the first-generation polymer reacts with maleic anhydride to prepare a white crystalline solid, and then the white crystalline solid and bisphenol A epoxy resin are subjected to a ring-opening reaction to prepare a yellow transparent viscous polymer. And finally, grafting hydroxyl-terminated polydimethylsiloxane to the yellow transparent viscous polymer to obtain a modified epoxy resin film coating agent, and then mixing the modified epoxy resin film coating agent with quartz sand to obtain the quartz sand proppant for fracturing. The quartz sand proppant for fracturing prepared by the invention has high sphericity, low density and high flow conductivity.

The application discloses a preparation method of Y molecular sieve, which comprises the following steps: mixing a silicon source, an aluminum source, an alkali source and a template agent to form a molecular sieve mother liquor, and performing crystallization, filtration, washing, drying and calcination to obtain the Y molecular sieve, wherein the template agent is polydialkyldimethylammonium chloride. The Y molecular sieve synthesis method is simple, the template agent used is environment-friendly and low in price, and the Y molecular sieve prepared by the method has the advantages of high silicon-aluminum ratio, large specific surface area, high crystallinity and good mass transfer effect.

An adhesive composition comprising a copolymer (A), a crosslinking agent (B), and an aqueous medium, wherein the copolymer (A) has structural units derived from a monomer (a1), structural units derived from a monomer (a2) having a carboxyl group, and structural units derived from a monomer (a3) ​​having an alkoxysilyl group, wherein the monomer (a1) is composed of either or both of an alkyl (meth)acrylate having only one olefinic double bond and a hydrocarbon having only one olefinic double bond, wherein the structural units in the copolymer (A) derived from the monomer (a2) are relative to those derived from the monomer (a1). The content of the structural unit in the copolymer (A) is 1.0 part by mass or more and 12 parts by mass or less in 100 parts by mass, and the content of the structural unit derived from the monomer (a3) ​​in the copolymer (A) is 0.010 parts by mass or more and 3.5 parts by mass or less in 100 parts by mass relative to the structural unit derived from the monomer (a1). The crosslinking agent (B) contains one or more selected from polycarbodiimide compounds, polyepoxide compounds and polyisocyanate compounds, and the content of the crosslinking agent (B) is 0.010 parts by mass or more and 10 parts by mass or less in 100 parts by mass relative to the copolymer (A).

The present invention discloses a passenger pick-up and drop-off scheduling method for a customized bus system between urban areas, the steps of which are as follows: all stops are divided into a starting point area containing n starting points and a terminal area containing m terminal points, and a travel node sequence set Y={y 1 ,y 2 ,…,y n+m}; According to the inverse of the distance of each sequence, find the probability of each sequence being selected, sequence y i The probability of being selected is #imgabs0# and then based on the random number in the interval [0.0,1.1], the determination is to use the sequence y i nodes, or randomly add nodes to generate a new travel node sequence y 0 , and then iterate continuously until convergence; the present invention converts the path weight into a probability distribution, and on the basis of continuously passing on the advantageous subsequent nodes, adopts a 10% mutation probability for each node, which can quickly iterate and evolve; since the data exchange with the memory is reduced, the running speed can be improved; the iterative evolution of the present invention has strong cohesion and can conveniently realize parallel computing.

The invention relates to a preparation method of a high-speed mouthpiece adhesive for PET (polyethylene terephthalate) tipping paper, which is mainly prepared by adding EVA (ethylene-vinyl acetate) emulsion, polyvinyl alcohol, a plasticizer, a wetting agent, a defoaming agent, a pH (potential of hydrogen) regulator, a bactericide and the like into prefabricated acrylic emulsion. The preparation method is characterized in that the prefabricated acrylic emulsion has a high solid content of 65-70%, and is prepared by suspension polymerization of a soft-segment acrylate monomer, a hard-segment acrylate monomer, a crosslinking monomer, abietate and a reactive emulsifier with carbon-carbon double bonds; the mass ratio of the prefabricated acrylic emulsion to the EVA emulsion to the polyvinyl alcohol to the plasticizer to the wetting agent to the defoaming agent to the pH value regulator to the bactericide is (20-30) to (55-65) to (5-10) to (3-5) to (0.1-0.5) to (0.1-0.5) to (0.1-0.5) to 0.1. The high-speed mouthpiece adhesive for the PET tipping paper can meet the requirements of the high-speed mouthpiece adhesive for the PET tipping paper on the bonding force, the cohesive strength and the bonding stability.

The invention relates to the technical field of waterproof coatings, and discloses an environment-friendly polymer cement waterproof coating and a preparation method thereof.The environment-friendly polymer cement waterproof coating is composed of a liquid material and a powder material according to the mass ratio of 1: 0.8-1.1, and the liquid material is prepared from acrylic emulsion, a coalescing agent, a defoaming agent, an inorganic modified material, a functional compound and water; the powder material comprises the following raw materials: cement, quartz sand, ground calcium carbonate, sodium stearate, wollastonite and a water reducing agent; by adding the inorganic modified material, the prepared waterproof coating has excellent waterproof performance, a water molecule diffusion path is prolonged, and water molecule permeation is effectively delayed; by adding the functional compound, the prepared waterproof coating has excellent bonding strength and ultraviolet resistance, can be tightly combined with a bonded base material, can still keep stable performance under long-term ultraviolet irradiation, and has long service life.

The invention discloses a dust-free plant-type cat litter and a preparation method thereof, and relates to the technical field of cat litter preparation. With the development of society, more and more people like to keep cats. Now there are many types of cat litters with different performances and functions. However, the dust problem of cat litters has always troubled cat keepers. They all expect that the cat litters can be truly dust-free, comprehensively protect the respiratory system of cats, have no effect on the home environment, and it is more convenient and quick to process the cat litters after use. The invention adopts plant bean dregs as raw materials, does not add harmful ingredients, can better protect the safety and health of pets, has the effect of safety and environmental protection, and also has super cohesive force, prevents the cat litter from sticking to the bottom, can quickly agglomerate, and can quickly soften and naturally decompose when encountering water after agglomeration, and can be directly flushed into a toilet. In the application stage, while absorbing water, it has a certain adsorption capacity for odors, can quickly lock the odors, and has no dust.

The application discloses a normal-temperature curing type super-high-strength epoxy splicing adhesive and a preparation method thereof, and belongs to the technical field of concrete bonding and reinforcing, and the technical scheme is as follows: the epoxy splicing adhesive comprises a resin system, a curing agent system and a reinforcing material, the resin system comprises the following raw materials in parts by weight: 15-20 parts of a composite epoxy resin, 3-5 parts of a multifunctional active diluent, 1-2 parts of an epoxy-based coupling agent, 3-5 parts of a toughening agent, 1-2 parts of an antifoaming agent, 2-5 parts of a wetting dispersant and 40-80 parts of a filler; the curing agent system comprises the following raw materials in parts by weight: 15-30 parts of a composite curing agent, 1-3 parts of an amino coupling agent, 1-2 parts of an antioxidant, 3-5 parts of an accelerator and 30-83 parts of a filler, the epoxy splicing adhesive is prepared by compounding the epoxy resin with different functionalities and the toughening agent, the structure toughness and the crosslinking network density of the cured product are controlled, and the mechanical mechanical properties of the epoxy splicing adhesive are remarkably improved.

The invention discloses an anti-aging essential oil patch and a preparation method thereof.The essential oil patch comprises a non-woven fabric, a bonding layer, an anti-seepage layer, an organic silica gel bonding layer and a release film which are sequentially stacked, essential oil is loaded on the non-woven fabric, the anti-seepage layer is connected with the bonding layer through melting and hot pressing, the anti-seepage layer is made of PET and can resist oil, dilute acid and dilute alkali, and the anti-aging essential oil patch is good in anti-aging effect and good in anti-aging effect. Good essential oil permeation prevention performance is achieved, and direct contact between the essential oil and the organic silicon gel adhesive layer is avoided. When PET cannot completely prevent essential oil from permeating, or the essential oil is volatilized and dissolved in an organic silicon gel adhesive layer, due to the fact that organic silicon gel is formed by connecting macromolecules through silicon-oxygen bonds, high-temperature resistance, aging resistance and solvent resistance can be achieved, a three-dimensional cross-linked network structure is formed through hydrogenation addition reaction, and the mechanical property of the film is improved. According to the essential oil patch, the organic silicon gel adhesive layer in which essential oil is dissolved still has good cohesion, so that the essential oil patch still has relatively high viscosity in a long-term storage process.

The invention provides a preparation method of cross-linked hyaluronic acid gel and a preparation containing microspheres and the cross-linked hyaluronic acid gel. The preparation method comprises the following steps: (1) mixing hyaluronic acid or a salt thereof, a cross-linking agent and an alkaline solution to obtain a mixed solution; (2) carrying out primary cross-linking reaction on the mixed solution to obtain first gel; (3) cutting the first gel into blocks, adding the blocks into an alkaline solution containing hyaluronic acid or salt thereof, and carrying out secondary cross-linking reaction to obtain second gel; and (4) purifying the second gel to obtain the cross-linked hyaluronic acid gel. The prepared hyaluronic acid gel has excellent cohesive force, the microspheres can be uniformly dispersed in the hyaluronic acid gel in an extremely short time, and after the hyaluronic acid gel is mixed with the microspheres, the microspheres can be uniformly distributed in the cross-linked hyaluronic acid gel for a long time and are not easy to displace, settle and agglomerate.

The invention provides yarn-fiber reinforced doped concrete, belongs to the technical field of building concrete, and aims to solve the technical problem of poor mechanical properties of concrete. The concrete is prepared from the following materials in parts by mass: 300 to 500 parts of cement, 200 to 500 parts of fly ash, 60 to 70 parts of silica fume, 88 to 176 parts of mineral powder, 400 to 425 parts of fine river sand, 5 to 20 parts of fiber, 5 to 10 parts of yarn and 300 to 400 parts of water. The yarn is further doped in the fiber-doped concrete, the internal fibers have high cohesive force due to twisting in the yarn, and the fiber-doped concrete is not prone to breakage compared with short fibers. When being doped in concrete, the yarn can be tightly combined with a concrete substrate and is intertwined and bridged with fibers in the concrete, so that the yarn forms a continuous three-dimensional network in the substrate, and the mechanical property of a concrete product is improved.

The invention discloses a high-strength eco-friendly permeable brick and a preparation method thereof, and relates to the technical field of permeable bricks. The eco-friendly permeable brick comprises the following raw materials in parts by weight: quartz sand: 80-100 parts, cement: 10-15 parts, deionized water: 30-50 parts, filler: 10-12 parts, defoamer: 2-5 parts, adhesive: 5-10 parts. The invention prepares a first-generation polymer by reacting urotropine and tromethamine, and then the first-generation polymer reacts with isocyanate-2-chloro-6-methylphenyl ester to prepare intermediate 1, and then intermediate 1 is reacted with bisphenol A epoxy resin to prepare intermediate 2, and finally γ-aminopropyltriethoxysilane is grafted onto intermediate 2 to prepare adhesive. The eco-friendly permeable brick prepared by the invention has good mechanical strength, water permeability and wear resistance.

The invention discloses a crystal form A of acetyl L-carnitine hydrochloride, a preparation method of the crystal form A, and a bulk drug, a food additive, a feed additive and a composition containing the crystal form A. The crystal form A of the acetyl L-carnitine hydrochloride is good in solubility, high in stability, high in purity, regular in shape and suitable for being applied to bulk drugs, food additives and feed additives. The preparation method is simple in process, the crystal form A can be obtained at high yield through in-situ crystallization of a reaction solution and dispersion of ethanol, and the preparation method is suitable for large-scale industrial production.

The invention relates to the field of textile, and discloses a hemp fiber bleaching process, which comprises the steps of pre-acid treatment, water washing, alkali boiling-off, re-water washing, oxygen bleaching, third-time water washing and softening treatment. Through scientific and accurate process control, the whiteness of the bleached fibrilia reaches a high standard, fiber damage is reduced as much as possible, and high strength is kept. Compared with a traditional bleaching process, the method effectively solves the problem that the fiber strength loss is large in the bleaching process, the final finished product has better durability and attractiveness, meanwhile, through the reasonable softening treatment procedure, the softness of the jute fibers is remarkably improved, the hand feeling of the jute fibers is more comfortable and fine, and the spinnability of the fibers is enhanced. The linen fibers subjected to softening treatment can be efficiently blended with the cotton fibers, and the prepared cotton and linen blended yarn is excellent in cohesive force, softness and elasticity.

The invention discloses a coating slurry and an aluminum foil double-side coated carbon material prepared from the coating slurry, the coating slurry comprises a reaction product of vinyl silicone oil, hydrogen-containing silicone oil, inorganic powder, a tackifier, an auxiliary agent and a diluent, and the coating slurry comprises 20-30 parts by mass of vinyl silicone oil, 2-10 parts by mass of hydrogen-containing silicone oil, 27-48 parts by mass of inorganic powder, 2-10 parts by mass of the tackifier, 0.55-1.10 parts by mass of the auxiliary agent and 30-50 parts by mass of the diluent. The coating slurry disclosed by the invention is high in adhesive force with a base material and excellent in thermal conductivity and electrical conductivity. The aluminum foil double-sided carbon-coated material prepared by using the coating slurry is high in interfacial force and cohesive force, relatively good in tensile failure resistance, capable of achieving relatively good mechanical properties, good in heat-conducting and electric-conducting properties, and also has the characteristic of long service life.

The invention discloses a polyurethane-pressure-sensitive adhesive composite structural adhesive and a preparation method thereof, and relates to the field of adhesive preparation. According to the invention, the polyurethane and the pressure-sensitive adhesive are compounded to prepare the polyurethane-pressure-sensitive adhesive composite structural adhesive; during compounding, the polyurethane and the pressure-sensitive adhesive can further react, so that the compounding effect is enhanced; the polyurethane comprises polyurethane subjected to chain extension by diamine; the pressure-sensitive adhesive comprises an acrylate resin modified pressure-sensitive adhesive. The polyurethane-pressure-sensitive adhesive composite structural adhesive prepared by the preparation method disclosed by the invention is stronger in cohesive force and adhesive force, simple in preparation process and wide in application value.

The invention provides a decorative explosion-proof membrane with liquid crystal colors, and relates to the field of glass and panel decoration. The hardened coating comprises 15%-25% of a toluene solvent, 18%-22% of an ethyl ester solvent, 16%-20% of a ketone solvent, 32%-45% of an acrylate prepolymer, 20%-35% of an acrylate monomer, 12%-25% of polymethyl methacrylate particles, 0.5%-3% of photoinitiators (two types of 184 and TPO) and 0.1%-1% of an auxiliary agent. The preparation method comprises the following steps: uniformly mixing the acrylate monomer and the solvent; according to the decorative explosion-proof film with the liquid crystal color, optical-grade PET, PC, PVC, TPU and other materials are selected as base materials, the surface of the base material is coated with a high-adhesive-force coating, the adhesive force of the coating to PET can reach 5B, the polarity of the surface of the coating is high, the coating has excellent adhesive force to printing ink, UV transfer printing glue, electroplating and the like, and the problem that when a decorative film is used as a printing coating, the surface of the coating is not prone to being damaged is effectively solved. The coating is easy to fall off and fade after being subjected to an aging test or used for a long time.

The invention belongs to the technical field of special functional coatings, and provides an ultralow-friction lightweight water-based coating as well as a preparation method and a construction method thereof. The coating comprises the following preparation raw materials in parts by weight: 36-48 parts of a film forming substance (epoxy emulsion), 0.8-1.8 parts of a dispersing agent, 0.1-0.3 part of a defoaming agent, 3-5 parts of a conductive filler (comprising one or more of conductive titanium dioxide, carbon nanotubes and conductive graphite) and 5-10 parts of a structural filler (comprising one or more of barium sulfate and talcum powder), the coating is prepared from the following components in parts by weight: 6-9 parts of lightweight filler (comprising one or more of titanium dioxide, silicon dioxide and hollow glass beads), 0.5-1 part of an anti-settling agent, 0.2-0.3 part of an antibacterial agent, 36-42 parts of water, 1-3 parts of a cosolvent and 12-16 parts of a curing agent. The water-based paint disclosed by the invention meets the requirements of corrosion resistance, mildew resistance, damp heat resistance and static electricity resistance, and meanwhile, the coating has good antifriction performance.

The invention discloses a stain-resistant odorless water-based acrylate emulsion and a preparation method thereof, the odorless water-based acrylate emulsion comprises the following main components: synthetic wax and modified polyacrylate of which the side chain contains imidazole and derivative groups thereof, and the odorless water-based acrylate emulsion has strong cohesion, good stability, strong stain resistance and high transparency after film formation; in the synthesis process, imidazole and a derivative thereof are subjected to an addition reaction with residual acrylate monomers to generate an odorless, odorless, non-volatile and low-surface-tension compound which is used as an efficient base material wetting agent to obviously improve the wettability of an emulsion to a base material, and meanwhile, as an interface agent, one end of the compound tightly acts on the base material to improve the surface tension of the emulsion. And a small amount of polyethylene wax is added in the emulsification process to form synthetic wax, so that the effect of the fatting agent can be improved, and the surface antifouling and oil-resistant effects are achieved.

The invention discloses a single-component solvent-free polyurethane adhesive and a preparation method and application thereof, the single-component solvent-free polyurethane adhesive is composed of a main material and an auxiliary agent, based on 100 wt% of the single-component solvent-free polyurethane adhesive, the main material comprises 40 wt%-65 wt% of polyether polyol, 4 wt%-15 wt% of polyester polyol, 15 wt%-45 wt% of isocyanate and 1 wt%-9 wt% of a chain extender; the auxiliary agent is prepared from 0.1 wt% to 1 wt% of a tackifier, 0.05 wt% to 0.5 wt% of a coupling agent, 0.03 wt% to 0.06 wt% of a catalyst and 0.002 wt% to 0.02 wt% of a stabilizer. When the single-component solvent-free polyurethane adhesive provided by the invention is used for paper-plastic compounding, after the single-component solvent-free polyurethane adhesive is cured for 12 hours in an environment with the temperature of 35 DEG C and the humidity of 70%, paper fibers are completely transferred, and the requirements of good initial adhesion, high bonding strength and high curing speed in the field of paper-plastic compound packaging are met.