289results about How to "Improve water resistance" patented technology

A primer composition for surface printed flexible packaging, an ink set, a surface printed material, and an inkjet printing method are provided which, in the case of an inkjet image formed after application of the primer composition, enable impart a coating film with excellent solid uniformity, bleeding resistance, scratch resistance, alcohol resistance and heat resistance. The primer composition for surface printed flexible packaging contains a polymer-emulsified acrylic resin emulsion, an N-oleoyl sarcosine, a hydrazine compound that has two or more hydrazine residues in the molecule, and a wax, wherein the content of the acrylic resin emulsion is 3-40 mass% in terms of solid content, and the glass transition temperature of the acrylic resin emulsion is between -40 and 30°C.

The subgrade anti-settlement structure is characterized in that a lower drainage layer has water resistance and is stacked on a cushion layer, and a lower geotechnical grid is arranged on the lower drainage layer; and the upper drainage layer is arranged on the lower geotechnical grid. The structural strip is embedded in the middle of the first rubber strip in the thickness direction and arranged in the width direction of the first rubber strip. According to the roadbed anti-settlement structure provided by the utility model, the strength of the first adhesive tape in the width direction is enhanced through the structural strips, and the structural strength of each grid in the lower geotechnical grids can be enhanced. By means of the lower geotechnical grid with the reinforced structure, the whole strength of the upper drainage layer is guaranteed, meanwhile, the toughness of each grid in the lower geotechnical grid is improved, and the possibility that the upper drainage layer is abnormal in structure is lowered. Reinforcement is achieved through compounding of the upper geotechnical grid, and the structural strength of the pavement layer is improved. Meanwhile, the structural stability of the upper drainage layer is improved, and the sedimentation possibility is reduced.

The present application relates to the technical field of high molecular antifogging coating, and particularly relates to a supermolecular coated shed film antifogging coating solution, a preparation method and application thereof, wherein acrylic acid, acrylamidoalkyl sulfonic acid, hydroxyalkyl acrylate and double-ene crosslinking monomer are used for tetra-copolymerization to construct a supermolecular matrix with carboxyl, sulfonic acid group, hydroxyl side group and crosslinking network, and a spandex antifogging agent is introduced in situ in the matrix, hydrogen bond and hydrophobic association synergistic effect between the side group functional groups and the spandex molecules are used to realize supermolecular coating, and then pH adjustment and functional additive compounding are performed to obtain the coating solution. The present application solves the problems of easy migration and precipitation of the traditional antifogging agent, coating brittleness, short effective period, and the obtained coating has comprehensive performances of long-acting antifogging, high light transmission, strong adhesion, flexible and bending-resistant, water-resistant and aging-resistant, and room temperature rapid curing, and is suitable for antifogging treatment of various agricultural shed films and greenhouse transparent materials.

The present application relates to the field of environment-friendly materials and its preparation technology, and particularly relates to a degradable environment-friendly paper cup interior coating and a preparation method thereof. The method comprises the following steps: firstly, synthesizing polymerizable quaternary ammonium salt surfactant (RPKO-X), and then introducing the polymerizable quaternary ammonium salt surfactant and a bio-based polymer solution into a polyacrylate molecular chain by a redox initiation polymerization method, so as to obtain a degradable acrylate emulsion for paper cup interior coating. By introducing the hydrophobic monomer RPKO-X with emulsifier characteristics, a stronger crosslinking network is formed, which can significantly improve the water resistance and oil resistance of the coating. Meanwhile, by introducing the bio-based material polyvinyl alcohol 2688, the environmental friendliness of the coating is enhanced, and the rapid degradation of the coating after use is promoted. By using the redox initiation polymerization system, the method is simple to prepare, can be prepared under mild conditions, and the emulsion particle size is uniform and stable.

The application relates to the technical field of building waterproofing, and discloses a composite waterproof structure for a high-pressure water environment and a construction method thereof, which comprises a concrete base body including a bearing platform and a raft, the bearing platform is located on the upper surface of the raft and the side wall is exposed, a gradient pressure-resistant waterproof layer covers the exposed surfaces of the side wall of the bearing platform and the plane of the raft, and the gradient pressure-resistant waterproof layer comprises, from inside to outside, an interface reinforcing layer, a permeable epoxy resin layer which penetrates into the surface of the concrete base body by 0.5-1 mm in depth, and a dynamic response layer which is a polyurethane-rubber composite elastomer layer and is tightly attached to the outer surface of the interface reinforcing layer. The gradient pressure-resistant waterproof layer composed of the interface reinforcing layer, the dynamic response layer and a rigid protective layer is combined with the bearing platform and the raft in the concrete base body, and the rigid protective layer enhances the wear resistance, so that the composite waterproof structure with high pressure resistance and high wear resistance is realized, and the stability and durability of the waterproof structure in the high-pressure water environment are effectively improved.

The application discloses a kind of eutectic solvent and its preparation method and application, the eutectic solvent is used for the dissolution, separation or regeneration of cellulose and / or starch, the eutectic solvent includes first solvent, second solvent and water;The first solvent is selected from at least one of the compounds shown in formula 1.The eutectic solvent of the application has very good solubility for cellulose and / or starch, can quickly dissolve a large amount of cellulose and / or starch, is suitable for the dissolution, separation and regeneration of cellulose and / or starch, etc., and is low in cost, easy to prepare, the raw materials used are all harmless to the environment, can be recycled, is an environmentally friendly solvent system.

This invention relates to the field of polymer materials technology, specifically disclosing a flame-retardant thermoplastic elastomer compound and its preparation method. The flame-retardant thermoplastic elastomer compound comprises 50-80 parts SEBS, 10-30 parts PP, 5-15 parts compatibilizer, 10-30 parts composite flame retardant, 3-10 parts plasticizer, 0.2-1 parts antioxidant, and 0.1-0.5 parts lubricant. The composite flame retardant is prepared by reacting and mixing an intumescent flame retardant, barium metaphosphate, boron nitride, triallyl isocyanurate, and SEBS. The flame-retardant thermoplastic elastomer compound of this application possesses good flame retardancy, mechanical properties, and water resistance stability.

The invention discloses a water-resistant and oil-resistant paper-based coating, a preparation method and a water-resistant and oil-resistant paper product, and belongs to the technical field of paper-based packaging materials. Hydrophobic modification is achieved through the esterification reaction of stearic acid and the chemi-mechanical pulp CNF, meanwhile, high-pressure homogenization treatment is combined, it is ensured that the hydrophobic chemi-mechanical pulp CNF is evenly dispersed, and the hydrophilic problem of the CNF is fundamentally solved; meanwhile, the prepared oil-proof agent takes soy isolate protein as a substrate, sodium-based montmorillonite is matched to form a synergistic oil-proof system, and a hydrophobic chemithermomechanical pulp CNF dispersion liquid and an oil-proof agent dispersion liquid are used for constructing a coating on the surface of a paper base, so that the coating has excellent water resistance and oil resistance at the same time. The coating prepared by the invention has good compatibility with a paper-based material, and subsequent paper can be degraded along with the paper-based material after being discarded, so that the problem of white pollution caused by a polyethylene spraying film is thoroughly abandoned; the chemical-mechanical pulp CNF raw material has the green property of being degradable and renewable, so that the green, environment-friendly, safe and sustainable coating system is realized.

The invention provides a nano-composite anti-seepage coating for goaf sealing and a preparation method and application thereof. The impermeable coating comprises the following components in percentage by mass: 10 to 30 percent of nano silica sol subjected to surface organic modification, 15 to 35 percent of styrene-butadiene latex subjected to pH buffer stabilization, 0.5 to 10 percent of functional nano material subjected to surface activation treatment, 20 to 60 percent of superfine sand and the balance of short fiber, inorganic powder filler and auxiliaries. The method comprises raw material pretreatment; step-by-step gradient blending is performed; and functions are compounded. According to the application, the nano-composite anti-seepage coating is applied to surrounding rock reinforcement, crack plugging or anti-seepage sealing engineering of a coal mine goaf. The slurry has the advantages of being high in deep infiltration capacity, excellent in surface film forming and internal compatibility and stable in performance, an internal infiltration reinforcing layer and a surface sealing layer can be formed at the same time after construction, and an integrated double-layer anti-seepage network is formed.

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

This invention proposes an impact-resistant seawall repair adhesive and its preparation method, belonging to the field of adhesive technology. The impact-resistant seawall repair adhesive is prepared from the following raw materials in parts by weight: 70-100 parts water glass, 30-40 parts sodium fluorosilicate, 5-10 parts ammonium chloride, 10-15 parts curing agent, 30-50 parts dimethyl silicone oil, 5-7 parts metal oxide, 2-4 parts emulsifier, and 100-120 parts water. This impact-resistant seawall repair adhesive is a silicate inorganic adhesive that can withstand extremely high temperatures and large tensile and shear forces. It boasts advantages such as high bonding strength with the substrate and abundant raw material sources, good stability, and convenient operation.

The application belongs to the technical field of polishing pads, and particularly relates to a polishing pad end point inspection window and a preparation method and application thereof. The preparation method comprises the following steps: reacting aliphatic isocyanate and polyester polyol to prepare a prepolymer, mixing the prepolymer with a curing agent, vacuum defoaming, and vulcanization. The polyester polyol is polycaprolactone diol obtained by taking polycarbonate diol as a starter and modifying caprolactone. The molecular weight of the polycarbonate diol is 200-400, and the molecular weight of the polyester polyol is 1000-3000. The curing agent comprises dihydric alcohol and alicyclic polyamine. The alicyclic polyamine has a branched chain with a carbon atom number of less than or equal to 4, and the functionality of the alicyclic polyamine is greater than or equal to 2. The polishing pad end point inspection window prepared by the preparation method has high light transmittance, and the light transmittance and hardness attenuation are reduced.

The application discloses acetoacetamide modified polyvinyl alcohol and a preparation method thereof, and the preparation method comprises the following steps: reacting p-ester and an acetoacetamide reagent at 20-80 DEG C for 1-3h in a polar solvent to generate N-acetoacetyl p-ester; then, the N-acetoacetyl p-ester is mixed with an alkaline catalyst and polyvinyl alcohol, and is added into a double-screw reaction extruder to generate N-acetoacetyl p-ester modified polyvinyl alcohol crude product; finally, the crude product is powdered, washed with methanol for three times to remove the catalyst and reaction inorganic salt, and is filtered and dried to obtain the N-acetoacetyl p-ester modified polyvinyl alcohol. The AAE-PVA prepared by the application can be used as a protective colloid for polyvinyl acetate emulsion polymerization, has better water resistance than common polyvinyl alcohol, and the water resistance, tensile strength and stability of the prepared emulsion adhesive are obviously improved. The synthesis steps of the application are simple, the safety risk is low, and the reaction yield is high.

The application discloses a kind of artificial humic acid slow-release fertilizer based on lignocellulose fermentation residue and a preparation method thereof.The method uses lignocellulose fermentation residue as raw material, through alkali catalytic depolymerization and amino reaction, lignin is converted into artificial humic acid, and combines hydroxyapatite to load nutrients such as nitrogen, phosphorus and potassium, to construct a three-dimensional slow-release network structure with carboxymethyl cellulose-calcium chloride ion crosslinking system, and artificial humic acid slow-release fertilizer is prepared.The slow-release fertilizer of the application has excellent slow-release performance, and the nutrient elements can be released stably, which improves the utilization rate of fertilizer, reduces nutrient loss, has soil improvement and slow-release fertilizer efficiency, and is suitable for facility agriculture, ecological restoration and sustainable agricultural development.

This invention discloses a composite fishing net line made from sisal fiber. The preparation method includes the following steps: sisal fiber is depectinized by pectinase; a mixture of ethanol and water containing tetraethyl orthosilicate is prepared, the pretreated sisal fiber is added, dilute sulfuric acid is added to react, and then an alkaline calcium source solution is added to react further, yielding sisal fiber after one treatment; silane coupling agent is used to modify the sisal fiber to obtain sisal fiber after a second treatment; a waxy waterproof layer is sprayed onto the surface of the sisal fiber after the second treatment, and it is dried to obtain sisal fiber monofilaments; the sisal fiber monofilaments are twisted and fixed to obtain the composite fishing net line. This invention uses sisal fiber as the main material to make fishing net lines, which can provide more options for reducing water pollution caused by microplastic particles from fishing nets, and also provides a good idea for expanding the field of deep processing of sisal.

The invention discloses a silane-terminated reactive phosphate flame retardant, a preparation method thereof and application of the silane-terminated reactive phosphate flame retardant in building external wall thermal insulation polyurethane, and belongs to the technical field of macromolecular flame-retardant materials. The structure of the flame retardant is (RO) 3Si-Z-NH-COO-[X-NH-COO] n-Y-O-P (= O) (OCH3) CH3, Z is a C2-C6 alkylene group, X is a C4-C12 alkylene group, n is 1-5, and Y is a C2-C6 hydroxyl-substituted alkylene group, so that not only is good compatibility considered, but also the cohesiveness with a building base material is greatly improved, and the flame retardant can be applied to the field of building materials. A phosphorus-based flame-retardant source, a long-chain flexible spacer group and a hydrolyzable silane end group integrated in a molecular structure serve as polyol components to directly participate in polyurethane reaction, so that the flame-retardant grade and the heat preservation property of the foam are greatly improved.

The application discloses an antibacterial wear-resistant packaging paper and a production process thereof, and belongs to the technical field of packaging paper. The production process comprises the following steps: S1, polyvinyl alcohol is added into deionized water, and the polyvinyl alcohol is dissolved under stirring at 95 DEG C to obtain a PVA solution; after the PVA solution is cooled to room temperature through mechanical stirring, a siloxane grafted quaternary ammonium cellulose suspension, a wear-resistant component and a crosslinking agent are added; after stirring at room temperature for 1 h, an antibacterial coating solution is obtained; and S2, the antibacterial coating solution is uniformly coated on the surface of a packaging base paper, the coating thickness is 60-100 microns, and the packaging paper is dried at 90-100 DEG C for 30-60 min; after being cooled to room temperature, the antibacterial wear-resistant packaging paper is obtained. In the antibacterial coating solution, the siloxane grafted quaternary ammonium cellulose and the wear-resistant component are introduced, and various combination relationships exist between the two, so that the coating density is increased, the packaging paper is endowed with good antibacterial property, and the water resistance and wear resistance of the packaging paper are improved.

The application relates to the technical field of building material corrosion and rust prevention, in particular to an inorganic polymer reinforced concrete anticorrosive coating and a preparation method thereof. According to mass fractions, the inorganic polymer reinforced concrete anticorrosive coating comprises 60-70 parts of a base, 8-12 parts of an anti-cracking system, 10-15 parts of modified fillers, 5-8 parts of an additive and 15-20 parts of a solvent; the base is selected from alkali-activated metakaolin; and the preparation method of the modified fillers comprises the following steps: calcining composite fillers at 480-500 DEG C for 1.5-2 h, immersing the composite fillers in a 10wt% tannic acid solution for 10-12 h after cooling, immersing the composite fillers in a modified liquid after filtration, ultrasonic dispersing the composite fillers for 20-30 min, vacuum drying the composite fillers, crushing and sieving the composite fillers to obtain the modified fillers. The application provides an inorganic polymer reinforced concrete anticorrosive coating and a preparation method thereof, so as to solve the problems of large self-shrinkage, easy cracking and single function in the related art, and the coating can adapt to complex environments.

The application discloses isosorbide bio-based polyurethane acrylate, which is prepared from bio-based isosorbide, bio-based 1,2-pentanediol, bio-based 1,5-pentanediol and bio-based succinic acid as raw materials through esterification reaction, vacuum polycondensation reaction, bio-based hydroxyl-terminated polyester, reaction of bio-based hydroxyl-terminated polyester and bio-based 1,5-pentamethylene diisocyanate, bio-based polyurethane, reaction of bio-based polyurethane and hydroxyethyl acrylate, and UV-curable isosorbide bio-based polyurethane acrylate. The application discloses application of the isosorbide bio-based polyurethane acrylate in preparation of UV coating, ink and adhesive. The isosorbide bio-based polyurethane acrylate is compounded with a UV monomer into a UV resin, the UV resin is compounded into a UV coating, and after curing, the UV coating has excellent properties such as high hardness, wear resistance, scratch resistance, heat resistance and weather resistance, and can be used as raw material of the UV coating, ink and adhesive.

The invention discloses a polyurethane resin modified acetic acid-propionic acid emulsion as well as a preparation method and application thereof, and belongs to the technical field of emulsions for glass fibers. The emulsion is prepared from the following raw materials in parts by weight: 200 to 300 parts of butyl acrylate, l70 to 210 parts of vinyl acetate, 10 to 15 parts of methacrylic acid, 8 to 15 parts of dimethyl ester, 5 to 10 parts of polyurethane resin, 5.0 to 6.0 parts of nonionic emulsifier, 4.0 to 5.0 parts of anionic emulsifier, 0.5 to 1.5 parts of initiator, 0.4 to 0.9 part of sodium bicarbonate and 350 to 400 parts of water. The preparation method comprises the following steps: (1) weighing the raw materials; (2) heating, stirring and dispersing the nonionic emulsifier, the anionic emulsifier and part of water to obtain a pre-emulsion; and (3) firstly stirring butyl acrylate, vinyl acetate, methacrylic acid, dimethyl ester and polyurethane resin, then adding the rest water and sodium bicarbonate, continuously stirring, heating, adding an initiator for reaction, finally dropwise adding the pre-emulsion, keeping the temperature and cooling to obtain the water-based adhesive. And polyurethane is used for modification, so that the water resistance and the heat resistance of the modified glass fiber are improved, and the modified glass fiber has excellent performance when being used on the glass fiber.

This invention provides a water-resistant soil stabilizer, its preparation method, and its application method. The water-resistant soil stabilizer includes component A and component B. Component A includes: 500-700 parts phosphogypsum; 1-5 parts coke powder; 80-160 parts fly ash; 10-20 parts calcium aluminate; 50-100 parts silicate cement clinker; 100-200 parts steel slag powder; 100-200 parts mineral powder; 5-10 parts quicklime; 5-10 parts sodium sulfate; 2-8 parts calcined alunite; and 1-5 parts fast-dissolving solid water glass. Component B includes: 10-90 parts hydroxyl silicone oil emulsion; 5-20 parts methyl hydrogen silicone oil emulsion; 15-30 parts epoxy polyamine adduct; 5-12 parts zinc acetate; 1-5 parts zirconium hydroxide; 1-5 parts triethanolamine; 1-4 parts coupling agent; 1-5 parts wetting agent; and 600-850 parts water. The water-resistant soil stabilizer of the present invention can improve soil density, has a good effect on solidifying heavy metals in soil, enhance soil compressive strength, and give the soil good water stability and good water resistance.

The application discloses a paper-based and pulp molded product strong water-based structure resin composition for constructing a fiber matrix, a kit and a preparation and application method thereof, and belongs to the technical field of papermaking wet end chemistry and pulp molding materials. In response to the global trend of replacing plastic with paper and fluorine-free control of food contact materials, the application aims at the pain point of failure of traditional chemicals in a high recycling pulp proportion and a closed water circulation high conductivity system, and constructs an acrylic polycarboxylic acid polymer and inorganic-organic dual charge buffer synergistic system. The scheme realizes the multiplication effect of physical strength such as breaking and ring pressure and the water resistance and oil resistance barrier performance by a unique crosslinking mechanism at a very low dosage, which is better than conventional enhancement technology on the market. The composition is a full water-based system and does not contain perfluorinated compounds, which ensures complete pulp recycling while giving the product excellent wet stiffness and film-forming density, and provides a green solution with high efficiency, low cost advantage and compliance for the papermaking and pulp molding industry.

A system and method for charging a battery. A charger includes a frame providing a support structure. The frame defines a receptacle for receiving a battery. The charger includes an electrical interface associated with each receptacle configured to electrically connect to a contact of the battery. The power system is used for supplying power to the electrical interface to charge the battery. The charger is configured to stabilize storage horizontally or vertically.

The application discloses a kind of corrosion-resistant industrial aluminum profile and manufacturing method thereof, belong to aluminum profile preparation technical field.In the surface of aluminum profile, corrosion-resistant paint is electrostatically sprayed, paint is with epoxy resin as matrix, it is separated from aluminum profile and outside environment, improve the corrosion resistance and water resistance of aluminum profile;The compatibility of prepared nanometer silicon dioxide with epoxy resin matrix is better than that of ordinary nanometer silicon dioxide, can improve the wear resistance of paint, also can promote the curing of paint;Prepared auxiliary can significantly enhance the heat resistance, corrosion resistance, light aging resistance and certain degree of water resistance of paint, and long-term stable performance;Therefore, the aluminum profile prepared by the application has excellent corrosion resistance and water resistance, and the paint sprayed on the surface of the aluminum profile has good wear resistance, also has stable and efficient corrosion resistance, heat resistance and light aging resistance, and has important application value in the field of aluminum profile preparation technology.

The invention discloses a sulfur-tolerant platinum-based catalyst and a preparation method thereof, and the preparation method of the sulfur-tolerant platinum-based catalyst comprises the following steps: weighing roasted ZrO2 as a carrier, weighing ammonium metatungstate, completely dissolving in deionized water, dropwise adding the solution until the carrier is completely immersed, and carrying out ultrasonic treatment; standing at room temperature, drying, and roasting in air at 500-600 DEG C to prepare a tungsten oxide loaded solid acid composite carrier WO3-ZrO2; and weighing chloroplatinic acid, completely dissolving the chloroplatinic acid in deionized water, dropwise adding the solution into the composite carrier, completely immersing the composite carrier, carrying out ultrasonic treatment, standing at room temperature, drying, and roasting in air at 250-350 DEG C to obtain the sulfur-tolerant platinum-based catalyst. The catalyst is simple in preparation method, has relatively strong tolerance to different sulfur species, and has good low-temperature catalytic performance and catalytic stability to low-carbon alkane.

The application belongs to the technical field of ship exhaust purification, and particularly relates to a catalyst for decomposing N2O in the exhaust of a ship ammonia internal combustion engine and a preparation method thereof. 3+ By replacing Co ions in the Co3O4 spinel lattice into the lattice, the doping behavior can effectively reduce the number of hydroxyl groups on the surface of the catalyst, significantly weaken the adsorption and combination ability of water molecules, and thus improve the stability of the catalyst in a high-humidity exhaust environment. As an additive, CeO2 uses its oxygen storage capacity to promote the migration and desorption of oxygen species in the reaction, preventing the deactivation of active sites due to oxygen poisoning. The molecular sieve carrier not only provides a highly dispersed surface for the active component to prevent sintering, but also optimizes the adsorption and activation path of N2O and alleviates the poisoning effect of nitrogen-containing intermediate species or impurities in the exhaust on the Co active center during the reaction.

The application discloses a drainage bag with an antibacterial functional layer and a preparation process thereof, and relates to the technical field of medical materials, and comprises the following steps: adding modified montmorillonite into N, N'-dimethylacetamide, uniformly mixing through ultrasonic, adding a polyurethane film, ultrasonic immersion for 60-120 min, drying, and obtaining a drainage bag substrate; adding polylactic acid into N, N-dimethylformamide, uniformly stirring and mixing, adding modified nano zinc oxide, uniformly mixing through ultrasonic, and then performing electrospinning to obtain an antibacterial coating fiber film; placing the antibacterial coating fiber film on the inner side surface of the drainage bag substrate, high-frequency heat sealing, assembling, and obtaining the drainage bag.

This invention discloses an intelligent heating system for instant water heaters, comprising an inlet water area including an inlet water temperature detection module mounted on an inlet pipe; an outlet water area including an outlet water temperature detection module mounted on an outlet water pipe; and a control module. The signal output terminal of the inlet water temperature detection module is connected to the second signal input terminal of the control module, the signal output terminal of the outlet water temperature detection module is connected to the third signal input terminal of the control module, and the first signal output terminal of the control module is connected to the signal input terminal of a stepper motor drive module. If the outlet water temperature is lower than the preset value, the control module calculates the required water inlet flow based on the difference between the outlet water temperature setpoint and the inlet water temperature to adjust the outlet water temperature to reach the preset value, allowing users to use hot water at the preset temperature and improving the user experience.

The invention belongs to the technical field of building materials, and relates to disposable redispersible asphalt powder as well as a preparation method and application thereof. The asphalt powder comprises the following components in parts by weight: 100 parts of asphalt, 2-20 parts of an emulsifier, 5-20 parts of protective colloid, 0.5-40 parts of a stabilizer, 1-10 parts of a slow-release complexing agent and 5-20 parts of an anti-caking agent. The slow-release complexing agent is one or more of activated modified borax, modified boric acid, modified sodium silicate or chromate, and the activation mode of the slow-release complexing agent is that an inorganic salt aqueous solution and a part of the protective colloid solution are mixed in advance. The specific slow-release complexing agent is introduced and forms a synergistic system with the emulsifier, the protective colloid and the like, so that the asphalt powder can be quickly redispersed when meeting water for construction for the first time, the complexing agent and a hydrophilic component are subjected to irreversible reaction after drying and film forming, redispersibility is permanently lost, and the technical problem that a traditional product is poor in water resistance after film forming is effectively solved. The product is suitable for the fields of waterproof and anticorrosive dry-mixed mortar, asphalt coiled material base layer treating agents and the like.

The application belongs to the field of paint, and particularly discloses PU white primer, a preparation method and application thereof. The PU white primer comprises A component, B component and C component. The A component comprises hydroxyl acrylic acid resin, castor oil, dispersing agent, defoaming agent, cyclohexanone, silicon dioxide, titanium white powder, talcum powder, calcium carbonate, butyl acetate, leveling agent, organic tin and propylene glycol methyl ether acetate. The B component comprises butyl acetate, HDI trimer and isocyanate prepolymer. The C component comprises dimethylbenzene, butyl acetate, propylene glycol methyl ether acetate and dimethyl carbonate. The PU white primer has the advantages of water resistance, high temperature resistance, adhesion, adhesion, hiding power and strong flexibility, and has superior comprehensive performance, is green and safe, low in cost, and is very suitable for being used as wood and stone surface primer in kitchens, bathrooms and the like.