612 results about "Water repellent" patented technology

The invention relates to the technical field of filling materials, and particularly discloses an ardealite-based high-strength anti-seepage filling material and a preparation process thereof, the ardealite-based high-strength anti-seepage filling material comprises 50%-65% of pretreated ardealite, 15%-25% of Portland cement, 5%-15% of superfine slag powder, 5%-10% of electrolytic manganese residues, 5%-8% of silica fume, 3%-6% of metakaolin, 2%-4% of a composite alkali activator and 0.5%-1.2% of a polycarboxylic acid water reducer, 0.3%-0.8% of an organic silicon water repellent and 0.05%-0.1% of cellulose ether; according to the invention, through chemical reaction of Mn < 2 + > in the electrolytic manganese residue and SO4 < 2-> in the phosphogypsum, micron-sized manganite crystals (MnAl2 (SO4) 4. 22H2O) are generated to actively fill internal micro-cracks of the material, so that a filling body is endowed with a self-repairing function and the impermeability is improved, and a composite alkali activator composed of NaOH and water glass is used for synergistically activating potential gelling activity of the superfine slag powder and the silica fume, so that the self-repairing filling material is prepared. And the formation of hydration products is accelerated, and 0.3-0.5 T of pulsed magnetic field is applied in the stirring process, so that the manganite crystals are guided to orderly grow along the expected stress direction of the filling body, and the compressive strength is improved.

The invention discloses a high-strength moisture-proof gypsum board and a preparation method thereof, and relates to the technical field of gypsum board preparation. The high-strength moisture-proof gypsum board is prepared by dipping the surface paper in the composite dipping liquid and then pouring the surface paper and the gypsum core with the waterproof agent, the composite dipping liquid comprises the methoxy vinyl ether copolymer and the epoxy polyoxymethylene dimethyl ether, and the methoxy vinyl ether copolymer is 2, 3, 5-trimethyl-1, 3-pentanediol monoisobutyrate. According to the present invention, epoxy polyoxymethylene dimethyl ether is prepared by reacting 2, 4-dimethoxymethoxyphenylacetic acid with 2-hydroxyethyl vinyl ether, and the epoxy polyoxymethylene dimethyl ether is prepared by terminating polyoxymethylene dimethyl ether with allyl and then reacting with phthalimide hexperoxy acid, such that the waterproofness and the mechanical property of the gypsum board are improved; the waterproof agent is prepared by reacting hydrogen-containing silicone oil and fluorine-containing hyperbranched amide polyurea urethane, so that the moisture resistance and bonding strength of the gypsum board surface paper are enhanced, and additional mechanical support is provided for the gypsum board.

The invention discloses an efficient flame-retardant waterproof and fireproof coating for a special humid environment and a preparation method, and relates to the technical field of waterproof and fireproof coatings, the waterproof and fireproof coating is prepared from a composite base material, a composite flame retardant, a nano waterproof agent, a moisture-proof auxiliary agent, a functional filler and a mixed auxiliary agent; the adhesive force and flexibility of the coating are synergistically improved through a molecular chain interpenetrating network, dual protection of a super-hydrophobic surface and a compact barrier layer is achieved in combination with a core-shell structure nano waterproof agent, a molecular-level moisture-proof barrier is constructed by adopting dual-intercalation modified bentonite, water vapor permeation can be effectively inhibited, and based on a ternary synergistic flame-retardant system, the flame-retardant performance of the coating is improved. An efficient expanded carbon layer is formed through coating modification and an eutectic structure, the fire endurance of the coating can be remarkably enhanced, in addition, the functional filler strengthens the mechanical property and the flame-retardant synergistic effect through multi-stage structural design and surface modification, the cross-linked network density is optimized in cooperation with gradient polymerization and irradiation curing processes, and the fire endurance of the coating can be remarkably improved. And finally, the bottleneck of performance degradation of the traditional coating in a humid environment is broken through.

The invention provides anti-erosion hydraulic concrete and a preparation method thereof, and belongs to the technical field of concrete. The concrete comprises the following components: composite cement, high-activity nano-modified metakaolin, blast furnace slag powder, low-calcium fly ash, coarse aggregate, natural river sand fine aggregate, granite machine-made sand fine aggregate, an erosion inhibitor, a functional additive, an early-strength polycarboxylic high-performance water reducer, a composite air entraining agent and the like. The composite cement comprises sulphoaluminate cement, Portland cement and polymer waterproof mortar. The high-activity nano modified metakaolin is obtained by modifying metakaolin with an organic silicon-ZnO composite emulsion and then drying. The erosion inhibitor comprises organic carboxylate, a hydrophobic-crystallization complexing agent and a pH buffer type corrosion inhibitor. The functional auxiliary agent comprises an itaconic acid and acrylic acid copolymer, a JRY-F concrete waterproof agent and polyethylene glycol-400 dilaurate. The composite air entraining agent comprises liquid sodium abietate and sodium alpha-olefin sulfonate. Through component synergism, modification and grading, an anti-erosion barrier is constructed.

The invention discloses a water-based nano anti-crack waterproof agent for concrete and a preparation method of the water-based nano anti-crack waterproof agent, and relates to the field of building materials. 10 to 25% of a silane emulsion; 20-40% of an acrylate copolymer emulsion; 0.5 to 5% of modified nano cellulose; 3-8% of a polycarboxylic acid water reducer; 0.1-1% of a defoaming agent; and the balance of water. Nano silica sol permeates concrete capillary pores and participates in a hydration reaction to improve the compactness of a matrix, a three-dimensional toughening network is constructed in cooperation with oriented crosslinking of carboxyl on the surface of TEMPO oxidized nano cellulose and gamma-aminopropyl silane, and micro cracks are covered with a flexible sealing layer formed by an acrylate copolymer. Active inhibition of cracks and long-acting blocking of water are synergistically realized, shearing force is regulated and controlled in a segmented manner through a stepped stirring process, the demulsification risk of an emulsion is avoided, and the storage stability of a system is remarkably improved.

The invention relates to a preparation method of a low-smoke halogen-free flame-retardant cable sheath material, and belongs to the technical field of cable materials. The cable sheath material is obtained by self-making a flame retardant and blending the flame retardant with polyethylene, a phosphorus-silicon-boron cross-linked network exists in the flame retardant, a protective layer is formed during combustion, the smoke amount is reduced while flame retardance is achieved, and low-smoke halogen-free flame retardance is achieved through phosphorus-silicon-boron synergy; according to the flame retardant disclosed by the invention, a phosphorus-oxygen group is connected with a silicon-oxygen group through a benzene ring, polarity mutation is buffered, and the flame retardant integrally presents low polarity, so that the compatibility between the flame retardant and a polyethylene matrix is enhanced, the flame retardant is more uniformly distributed in the matrix, the interface bonding is more excellent, and the mechanical property of the material is remarkably improved; and a long-chain siloxane coating structure in the flame retardant can form a water repellent layer on the surface of the material to achieve a hydrophobic effect, so that the dielectric property of the material is not influenced in a humid environment, and the stability and safety of power transmission are ensured.

The invention belongs to the technical field of aluminum alloy cables, and discloses a high-strength heat-resistant light-weight green aluminum alloy cable which sequentially comprises a silver-aluminum alloy conductive core, a conductor shielding layer, an insulating layer, an insulating shielding layer, a PP filling rope, a non-woven fabric wrapping tape, a steel belt and a heat-resistant flame-retardant waterproof outer sheath layer from inside to outside. The silver-aluminum alloy conductive core comprises the following components in percentage by weight: 0.01 to 0.3 percent of Cu, 0.3 to 0.8 percent of Fe, 0.03 to 0.1 percent of Si, 0.01 to 0.05 percent of Zn, 0.02 to 0.05 percent of Mg, 0.001 to 0.04 percent of B, 0.01 to 0.08 percent of Ag and the balance of Al; the silver and copper microalloying effect is cooperated with the molded line film drawing process, so that the strength and the conductivity of the conductor are improved; and the outer sheath layer takes a polydimethylmethylhydrosiloxane grafted waterproof agent and a 4-vinyl aniline polymer as functional modifiers, and PVC is compounded, so that the cable is endowed with excellent heat-resistant, flame-retardant and waterproof characteristics.

The invention discloses a long-acting durable waterproof paint with a self-repairing function and a synthesis method thereof, and relates to the technical field of waterproof paints.The long-acting durable waterproof paint is prepared from self-repairing matrix resin, a bi-component microcapsule self-repairing agent, a fluorine-silicon modified waterproof agent, a nano reinforcing filler and a weather-proof additive; through the synergistic effect of a dynamic disulfide bond and an interpenetrating network, the balance of molecular-level self-repairing and macroscopic mechanical properties is achieved, the efficiency bottleneck of single-component self-repairing is broken through through a two-component microcapsule system, a three-dimensional cross-linked structure of the fluorosilicone modifier endows the super-amphiphobic property, meanwhile, the hydrophobic and oleophobic properties are achieved, and the self-repairing effect is good. In addition, a multi-scale reinforcing system is constructed through the gradient nano filler, so that the crack growth needs to consume higher energy, and finally, the integrity of the microcapsule and the accurate control of the crosslinking degree of the resin are ensured through a specific curing process in the synthesis process, so that the waterproof coating finished product has excellent self-repairing capability, weather resistance and waterproof performance.

The invention relates to the field of solid waste co-processing and utilization, and particularly discloses complex-phase gypsum-based self-leveling mortar and a preparation method thereof. The mortar comprises the following raw materials in parts by mass: 75-95 parts of complex-phase gypsum, 3-25 parts of an auxiliary cementing material and 0.5-2.5 parts of an auxiliary mixture, the complex-phase gypsum comprises semi-hydrated gypsum, dihydrate gypsum and anhydrous gypsum; the auxiliary gelling material is a mixed compound material of ordinary Portland cement, aluminate cement, a calcium sulphoaluminate cementing material and sulphoaluminate cement; the additive mixture comprises one or more of a retarder, a water-retaining agent, a suspension / stabilizer, a water reducing agent, a flow promoter, a defoaming agent, a water repellent and an exciting agent. The gypsum-based self-leveling mortar prepared by the invention integrates the advantages of single semi-hydrated gypsum and single anhydrous gypsum, realizes the characteristics of high early strength and high later strength, and has the advantages of high strength, good wear resistance and low cost.

The present invention relates to a weather-resistant and scratch-resistant super-hydrophobic organosilicon waterproofing agent and a preparation method thereof, and belongs to the technical field of organosilicon waterproofing materials. The organosilicon waterproofing agent comprises the following components by weight: 1 to 10 parts of hydroxy silicone oil, 1 to 10 parts of vinyl silicone oil, 1 to 5 parts of amino silicone oil, 1 to 3 parts of a first silane coupling agent, 1 to 5 parts of a second silane coupling agent, 1 to 3 parts of nano-silica, 80 to 100 parts of a solvent, and 0.001 to 1 part of a catalyst. The organosilicon waterproofing agent of the present invention can be widely used on the surfaces of various building materials and can quickly make the surface of the substrate achieve a super-hydrophobic effect. It can also achieve a long-term weather-resistant effect and possess excellent weather-resistant and scratch-resistant properties. In addition, the preparation process of the waterproofing agent of the present invention uses simple and inexpensive industrial raw materials, the production process is economical and efficient, the production process is simple to operate, the production energy consumption is low, and it is easy to scale industrial production.

The invention relates to the technical field of composite materials, in particular to a composite material for a waterproof breathable film and a preparation method of the composite material. The composite material for the waterproof breathable film comprises the following raw materials: PTFE resin, zinc oxide, a surfactant, a compatibilizer and a waterproof filler, the waterproof filler is a porous inorganic carrier material treated by a silane modified waterproof agent; the silane modified waterproof agent is a compound containing a perfluoropolyether chain segment and a siloxane chain segment. According to the prepared composite material for the waterproof and breathable film, the porous filler is subjected to surface modification through the perfluoropolyether-silane coupling agent, and the waterproofness, breathability and mechanical property of the PTFE composite material can be synchronously and synergistically improved.

The invention discloses a fireproof coated pipe as well as a preparation method and application thereof, and relates to the field of organic composite materials. The fireproof coated pipe comprises a mother blank material and a liquid waterproof agent, wherein the mother blank material comprises a flame-retardant polymer matrix, coated graphite and a heat-conducting filler; the coated graphite is formed by expanded graphite and a coating layer on the surface, and the coating layer comprises a silicon source and a phosphorus source. The surface of the expanded graphite is coated with the silicon dioxide-phosphide composite material, so that the compatibility of the filler and a specific type of flame-retardant polymer matrix can be improved, the addition amount of the heat-conducting filler is reduced to ensure uniform dispersion, and synergistic multiplication of a flame-retardant function and optimization of a heat-conducting network are realized; meanwhile, a specific type of liquid waterproof agent is introduced and is extruded and blended with the master batch, so that the material is endowed with excellent waterproofness, meanwhile, the compatibility with other core properties is ensured, the waterproof coated pipe material with efficient heat conduction, flame retardance, waterproofness and mechanical strength is provided, and the application field is expanded.

The invention discloses a strong hydrophobic type composite concrete waterproofing agent as well as a preparation method and a use method thereof. The waterproofing agent is prepared from 14-18 parts of a hydrophobic / temperature-inhibiting composite active component, 2-3 parts of a silane coupling active component, 2-3 parts of an emulsifying active component, 4-6 parts of a complexing active component, 8-10 parts of a crystallizing active component and 60-70 parts of water. The polyorganosiloxane / paraffin composite emulsion is synthesized in one step by co-emulsifying polyorganosiloxane and paraffin, and other functional active components are compounded, the preparation method provided by the invention is simple to operate, and the prepared waterproof agent system is stable and has the following beneficial effects after being doped into concrete: 1, the hydrophobicity of the concrete is remarkably improved; 2, excellent crystallization performance helps self-healing of concrete microcracks, and the impermeability of concrete is significantly improved; and 3, cracks caused by too fast temperature rise of initial hydration heat of the concrete are effectively inhibited, and the crack resistance of the concrete is remarkably improved.

To provide: a water-repellent composition from which it is possible to obtain a water-repellent fiber product excellent in water repellency, durable water repellency, water pressure resistance, durable water pressure resistance, abrasion resistance, durable abrasion resistance, and texture; a method for producing a water-repellent fiber product using the same; and a water-repellent fiber product using the same.SOLUTION: A water-repellent composition contains an amino-modified silicone, a silicone resin, and an alkyl polysiloxane, where: the blending amount of the silicone resin is 1,000-5,000 pts.mass relative to 100 pts.mass of the blending amount of the amino-modified silicone; and the blending amount of the silicone resin is 60-130 pts.mass relative to 100 pts.mass of the total blending amount of both the amino-modified silicone and the alkyl polysiloxane.SELECTED DRAWING: None

The invention relates to a phase change microcapsule composite aerogel thermal insulation material and a preparation method thereof. The phase change microcapsule composite aerogel thermal insulation material comprises a phase change energy storage layer and a thermal insulation layer, the phase change energy storage layer is prepared from energy storage powder and an adhesive, and the phase change energy storage powder comprises a thermal insulation material, phase change microcapsules, a flame retardant and fibers; the heat preservation and insulation layer is prepared from heat preservation and insulation powder and an adhesive, and the heat preservation and insulation powder comprises a heat preservation material, a flame retardant and fibers; the adhesive comprises polyvinyl alcohol, boric acid and silica sol. The preparation method of the phase-change microcapsule composite aerogel plate comprises the following steps: preparing a bonding agent into a bonding solution by using water, a defoaming agent and a water repellent agent, mixing the energy storage powder with the bonding solution, mixing the heat preservation and heat insulation powder with the bonding solution, obtaining a plate blank by adopting a sectional double-roller process, and curing and drying to obtain the phase-change microcapsule composite aerogel plate. The microcapsules in the aerogel plate and the aerogel have a synergistic effect, the excellent heat preservation performance is continuously achieved in the phase change process and after phase change is completed, and heat conduction is effectively reduced.

The application discloses a kind of organic silicon waterproof agent for ultra-high performance concrete plate and preparation method, including hydroxyl silicone oil 5-20 parts, silane coupling agent 2-10 parts, amino silicone oil 1-5 parts, nano white carbon black 1-10 parts and organic solvent 50-100 parts.The organic silicon waterproof agent of the application can be used on the surface of UHPC plate, cement concrete base material, mortar fast, stone material, etc., can form the effect of super-hydrophobic on the surface of base material, and make the water-repellent performance of base material surface keep long.The method of the application can economically and efficiently produce the waterproof agent by using simple and cheap raw materials, the production process is simple, energy consumption is low, and the waterproof agent can be mass-produced and used.

The invention discloses aerogel thermal-insulation waterproof mortar and a preparation method thereof. The mortar is prepared from cement, hydrophobic aerogel, interface modified asphalt rubber powder, a composite phase change heat conduction material, blast furnace slag micro powder, silica fume, nano montmorillonite, titanium dioxide aerogel powder, expanded vermiculite, shape memory polymer emulsion, chitosan, charcoal powder, carbon fibers, basalt fibers and the like. The preparation method comprises the following steps: carrying out plasma treatment and modification with an organosilicon waterproofing agent to obtain hydrophobic aerogel; carrying out interface modification on the asphalt rubber powder by adopting a titanate coupling agent; a phase change microcapsule-carbon nanotube heat conduction network is constructed through ball milling compounding; a basic framework is formed by adopting a graded mixing process, and then functional components are introduced; and finally, realizing cross-linking curing of the shape memory polymer and the chitosan through ultrasonic assistance and programmed temperature control. The mortar prepared by the invention realizes integration of multiple functions, and effectively solves the technical problems of single performance and poor durability of a traditional thermal insulation material.

The invention relates to the technical field of building materials, and provides a sound-insulation fireproof building material and a preparation method thereof. The sound-insulation and fireproof building material is prepared from, by weight, 100 parts of flame-retardant wood fiber, 15-30 parts of adhesive, 5-6 parts of hollow glass beads and 1-3 parts of waterproof agent, a preparation method of the flame-retardant wood fiber comprises the following steps that a flame retardant is dispersed in a solvent, wood fiber is added, mixing and drying are conducted, and the flame-retardant wood fiber is obtained; and the flame retardant comprises a 2, 4-dihydroxy-5-pyrimidine boric acid and / or a phenyl phosphate compound. By means of the technical scheme, the problem that in the prior art, sound-proof and fireproof building materials are poor in flame retardant property is solved.

The invention discloses a high-abrasion-resistance concrete additive as well as a preparation method and application thereof, and belongs to the technical field of concrete additives. The invention discloses a concrete additive with high abrasion resistance. The concrete additive is prepared from the following raw materials in percentage by mass: 30-40% of silica fume, 15-20% of mineral powder, 8-12% of nano silicon carbide, 2-8% of zirconium oxide microspheres, 10-15% of a polycarboxylic acid water reducer, 3-5% of an organic silicon water repellent, 2-5% of nano titanium dioxide and 5-10% of a modified bamboo-based material. The anti-abrasion additive prepared by the invention can ensure that the permeability coefficient is greater than or equal to 0.5 mm / s while ensuring the high anti-abrasion performance of concrete, is suitable for engineering scenes such as permeable pavements and the like with strict requirements on water permeability, and realizes the synergistic improvement of high water permeability (greater than or equal to 0.5 mm / s) and ultrahigh anti-abrasion performance (the strength ratio is greater than or equal to 140%) of the concrete; the problem that the water permeability and the abrasion resistance of traditional concrete cannot be synchronously improved at the same time is successfully solved.

A moisture-permeable waterproof laminated fabric (9) includes an outer fabric layer (2), and a nanofiber nonwoven fabric layer (3) laminated on one face of the outer fabric layer (2). At least one face of the nanofiber nonwoven fabric layer (3) is a water-repellent layer (5). The outer fabric layer (2) and the nanofiber nonwoven fabric layer (3) are partially bonded together with an adhesive (4). A method for manufacturing the fabric includes applying a water repellent agent to at least one face of the nanofiber nonwoven fabric layer (3) and curing the water repellent agent to form a water repellent layer (5), and partially bonding the nanofiber nonwoven fabric layer (3) and the outer fabric layer (2) together with an adhesive (4). As a result, the moisture-permeable waterproof laminated fabric that can continue to display the air permeability and the moisture permeability of its moisture permeable film irrespective of exposure to rain and perspiration during wearing, the method for manufacturing the fabric, and a garment including the fabric are provided.

The present invention relates to the technical field of building insulation materials, and in particular to an exterior wall insulation board and a production method thereof. Slag powder, active microsilica, cement, fly ash, a water reducer, a waterproofing agent, a redispersible latex powder, a cellulose ether, silicon dioxide, a reinforcing fiber and water are mixed to obtain a premixed cementitious material; EPS aggregate is added to the premixed cementitious material and mixed at a low speed to obtain a premix; the premix is ​​loaded into an exterior wall insulation board mold, baked at 80-85°C for at least 8 hours after compaction, demoulded after natural cooling, and cured for at least 7 days to obtain an exterior wall insulation board. The exterior wall insulation board provided by the present invention has a compressive strength of ≥0.2MPa and a thermal conductivity of less than 0.050W / (m·K). At the same time, it is tested according to the GB / T 5464 standard and meets the requirements of non-combustible materials of grade A2 and above, has the advantages of low thermal conductivity, high fire resistance, etc., and the high compressive strength can meet the requirements of JG / T 253‑2019.

The invention belongs to the technical field of building materials, and particularly relates to a joint mixture for drainage ditch installation and a preparation method thereof, the joint mixture comprises the following raw materials by weight: 35-50 parts of urethane acrylate resin, 20-30 parts of Portland cement, 10-15 parts of fly ash, 5-10 parts of kaolin, 3-6 parts of modified carbon fiber, 0.2-1 part of a photoinitiator, 0.5-2 parts of an organosilicon waterproofing agent, and 4-8 parts of a stabilizer. The modified carbon fiber is added into the joint mixture as a reinforcing phase, so that the mechanical strength and wear resistance of the cured joint mixture can be effectively enhanced. According to the invention, the stabilizer is added into the joint mixture, so that the joint mixture has antioxidant and antibacterial effects. The polyurethane acrylate resin is adopted as the main filler, the photoinitiator is good in stability and can be stored in a dark place after being mixed, the photocuring speed is high, and use is convenient.

The invention relates to the technical field of paper preparation, in particular to environment-friendly water-resistant paper as well as a preparation method and application thereof. The water-resistant paper is prepared by physically embossing a hydrophobic paper semi-finished product and then coating the hydrophobic paper semi-finished product with a hydrophobic coating. The hydrophobic paper semi-finished product is prepared from the following components in parts by weight: 65 to 80 parts of hydrophobic modified lignin fiber, 10 to 20 parts of an adhesive, 2 to 5 parts of a waterproof agent, 5 to 15 parts of filler, 0.05 to 0.1 part of a filter aid and 0.5 to 1 part of an antioxidant. The water-resistant paper not only has the characteristics of excellent water resistance, instant water resistance, pollution resistance, self-cleaning, no toxicity, easiness in degradation, recoverability and environmental protection, but also has firm wet mechanical strength and long service life, meets the urgent demand of the market on environment-friendly paper, conforms to the European Union laws and regulations, can also improve the additional value and profit margin of common paper, and has wide application prospects. Industrial upgrading and product differentiation competition are brought to the papermaking industry, and wide application prospects are achieved.

The present invention relates to the technical field of aerosol fire extinguishing agents. Specifically disclosed are a chemical coolant for an aerosol fire extinguishing agent, and a preparation method therefor and a use thereof. The coolant comprises the following components in percentage by weight: 80%-95% of an organic acid, 1%-10% of a lubricant, and 1%-10% of silicone oil. The preparation method specifically comprises: weighing the organic acid, the lubricant, and the silicon oil, uniformly mixing same in proportion, granulating by a screen, and pressing the obtained particles by means of a tablet press so as to obtain a chemical coolant tablet for an aerosol fire extinguishing agent. In the present invention, the organic acid is used as a main raw material, and the lubricant and a water repellent agent are added, so that it is convenient for preparation, molding and storage; during specific use, the surfaces of aerosol particles are coated with the organic acid, so that the hygroscopicity of the coolant and corrosion to metal are reduced.

The invention relates to a high-strength impervious concrete waterproofing agent and a preparation process thereof, the waterproofing agent is prepared by mixing the raw materials of modified silica fume, nanoscale active SiO2, a composite expanding agent, ettringite crystal matrix, acrylate copolymerized rubber powder, a polycarboxylate superplasticizer, a rare earth activator and hydroxyl silicone oil emulsion through specific process steps. Wherein the modified silica fume, the nano-scale active SiO2, the composite expanding agent and other key components are all prepared by adopting a special preparation method, so that the performance of the modified silica fume, the nano-scale active SiO2 and the composite expanding agent is enhanced. The preparation process comprises the following steps: preheating the modified silica fume, premixing the nano material, forming a complex, mixing at a low speed, adding the rubber powder and the water reducing agent, introducing the rare earth exciting agent, carrying out vacuum degassing, curing and the like, and finally obtaining the high-strength impervious concrete waterproof agent with excellent performance. The waterproof agent has the performance of remarkably improving the compressive strength, breaking strength, wear resistance, chloride ion permeability resistance and the like of concrete, and is suitable for concrete engineering with high-strength anti-permeability requirements.

The invention belongs to the technical field of smog moisture content measurement, and discloses a high-voltage cable production process based on a moisture-proof technology, which comprises the following specific steps: step 1, pretreating an insulating raw material, reducing the moisture content of the insulating raw material, carrying out moisture-proof treatment on a conductor and a shielding material, and carrying out drying and dehumidification treatment before raw material processing; and step 2, carrying out moisture-proof strengthening on the key process, and establishing a multi-stage moisture-proof insulating layer. According to the high-voltage cable production process based on the moisture-proof technology, through full-dimensional modification and pretreatment of insulation, conductor and shielding materials, a moisture adsorption path is blocked from the source, materials such as nano montmorillonite and a water repellent agent are added into an XLPE insulation base material, and moisture adsorption is reduced by means of dual effects of physical barrier and chemical hydrophobicity; in cooperation with high-temperature drying treatment, air holes are prevented from being generated during extrusion, and the conductor is subjected to electrolytic polishing to remove an oxide layer and is synchronously coated with a water-blocking material.

Provided is a water repellent composition comprising (A) a polymer and (B) a silicone compound, wherein the polymer (A) contains a repeating unit derived from a hydrocarbon group-containing monomer (a) having a hydrocarbon group having 2-40 carbon atoms; the silicone compound (B) is composed of a non-resin-based silicone and a resin-based silicone; in a GPC chart of the silicone compound (B), there is a peak top in a region in which the molecular weight is 1500 or more; a component having a molecular weight of 1500 or more in the silicone compound contains the non-resin-based silicone excluding amino-modified silicones; and the amount of the silicone compound (B) is 1%-49% by weight with respect to the total amount of the amount of the polymer (A) and the amount of the silicone compound (B). The water repellent composition according to the present disclosure can provide a water repellent composition that can impart good water repellency and good chalk mark properties to a base (in particular, a fiber product).

A slide fastener includes a pair of left and right fastener tapes; and a pair of element rows including a plurality of fastener elements that face edge portions of the fastener tapes on sides facing each other along a length direction of the fastener tapes, and to which a slider that engages with the pair of element rows is slidably attached. The fastener element is made of a metal, a water-repellent layer made of a water-repellent agent is provided on the fastener tape, and adhesion of water to the fastener tape is prevented by the water-repellent layer.

A composite fiber is provided in which two types of segments A and B are present in a fiber transverse section, where the segment B has a cross-sectional area smaller than a cross-sectional area of the segment A, and is formed of two types of polymers combined in a side-by-side type or an eccentric core-sheath type; and where a multifilament is composed of two types of filaments A and B, in which one or more of the filaments B are present between any two of the filaments A in the multifilament; and where a woven or knitted fabric is subjected to water repellent finish and includes a multifilament composed of two types of filaments A and B, in which one or more of the filaments B are present between any two of the filaments A in the multifilament.

The invention discloses a biomass-based degradable waterproof and oilproof coating as well as a preparation method and application thereof. The biomass-based degradable waterproof and oil-proof coating is composed of a waterproof coating and an oil-proof coating, and the waterproof coating is composed of a stearic acid emulsion, nano cellulose, a waterproof agent, an inorganic filler, a dispersant, a defoaming agent, a coalescing agent, a pH regulator and water. The oil-proof coating is prepared from natural resin, plant-based fatty acid ester, chitosan, nano cellulose, a waterproof agent, an oil-proof agent, inorganic filler, a dispersing agent, a defoaming agent, a preservative, a pH regulator and water. The biomass-based degradable waterproof and oil-proof coating has the advantages that the raw materials are natural in source, degradable and convenient to use, a formed coating has excellent waterproof and oil-proof performance and excellent thermal stability, and the like, can be used for products needing waterproof and oil-proof performance such as paper pulp molded products, and is suitable for large-scale industrial production and application.