4781results about How to "Waterproof" patented technology

The invention discloses a preparation method of a one-way wet conduction nano-fiber multilayer composite membrane with the wettability gradient. The method comprises the following steps that hydrophilic nano materials are dispersed in solvent, the nano materials are dispersed uniformly through ultrasound, a hydrophilic polymer is dissolved in the dispersing agent, a spinning solution A1 is obtained, and a hydrophilic nano-fiber membrane is deposited on a receiving base material through an electrostatic spinning method; hydrophilic nano materials are dispersed in solvent, the nano materials are dispersed uniformly through the ultrasound, a hydrophilic polymer is dissolved in the dispersing agent, and a spinning solution A2 is obtained; a hydrophobic polymer is dissolved in solvent, and a spinning solution B1 is obtained; the two spinning solutions are deposited on the hydrophilic nano-fiber membrane to form at least one diversion layer through the electrostatic spinning method; a hydrophobic polymer is dissolved in solvent, a spinning solution B2 is obtained, a hydrophobic nano-fiber membrane is deposited on the diversion layers through the electrostatic spinning method, and the one-way wet conduction nano-fiber multilayer composite membrane with the wettability gradient is obtained.

The invention provides a modified asphalt composition with a creeping characteristic, which comprises the following components in parts by weight: 15-60 parts of asphalt, 3-15 parts of modifying material, 5-30 parts of rubber powder, 15-60 parts of softening agent, 15-60 parts of inorganic powder, 3-25 parts of viscosity regulating agent, 0.3-1.5 parts of peptizing agent and 0.1-2 parts of coupling agent. A preparation method of the modified asphalt composition comprises the following steps of: adding the softening agent into a reaction kettle, heating to 170 to 200 DEG C, adding the modifying material, agitating, adding the asphalt and the rubber powder, and agitating for 1-2 h to obtain an intermediate raw material; levigating the intermediate raw material to 150-250 meshes, and putting back to the reaction kettle; and finally, adding the inorganic powder, the viscosity regulating agent, the peptizing agent and the coupling agent into the reaction kettle, agitating and dispersing uniformly. The modified asphalt composition has the characteristics of excellent water-proof performance, strong binding capability and continuous binding capability, large elongation percentage and good low-temperature flexibility.

The invention discloses an electrothermal composite ceramic brick and a preparation method thereof. An electrothermal coating layer, a guiding-out wiring electrode, a coating insulation packaging waterproof layer and an application foaming ceramic layer coat an unglazed surface of a ceramics substrate in order. The electrothermal coating layer coats the unglazed surface of the ceramics substrate in an electrothermal slurry form, the electrothermal slurry permeates the green body of the ceramics substrate, and the penetration depth is less than the thickness of the ceramics substrate and more than 0.5mm. Because of the penetration, the electrothermal coating layer of the electrothermal composite ceramic brick is combined with the ceramics substrate tightly, a surface heating mode is achieved, the thermal efficiency is high, normal and safe usage can be achieved under a voltage of 24-380V, the heating power is 90-120w / m<2>, and the temperature of the ceramics substrate can reach 18-50 DEG C through a temperature control device. The insulation packaging waterproof layer and the foaming ceramic layer outside the electrothermal coating layer can prevent heat from outward transmission effectively, heat loss is lowered, and the whole safety and reliability of the ceramic brick are raised.

The invention relates to a building material, and in particular relates to an exterior wall color surface decoration mortar and a preparation method thereof. The exterior wall color surface decoration mortar comprises the following raw materials by weight: 20%-30% of white cement, 50%-60% of quartz sand, 0.1%-0.5% of chopped fiber, 10%-20% of heavy calcium carbonate, 0.2%-1% of latex powder, 0.3%-0.5% of cellulose ether, 1%-5% of an inorganic pigment, 0.2%-0.4% of a water repellent, 5%-10% of coal powder ash, 0.1%-0.15% of a defoaming agent, 1%-3% of metakaolin, 0.2%-0.5% of a thixotropic lubricant and 1%-2% of a water reducing agent. The exterior wall color surface decoration mortar has the advantages of crack resistance, weather resistance, good ultraviolet resistance, permanent and uniform color, good whiskering resistance, and the like, can be well combined with various inorganic base layer materials, is good in coating density, and can be widely used in the building fields such as exterior wall decoration and the like.

The invention provides interior wall adornment leather and a preparation method. The interior wall adornment leather comprises base fabric, a foaming layer and a surface layer, wherein an adhesive layer is arranged between the base fabric and the foaming layer; the foaming layer contains foamed water-borne polyurethane resin; the surface layer contains inflaming retardant water-borne polyurethane resin; and the adhesive layer contains adhesive water-borne polyurethane resin. The interior wall adornment leather not only has the advantages of traditional wallpaper sound insulation, heat preservation, gorgeousness and easy adornment, but also has the advantages of safety, environment protection, endurance, ageing resistance and fame resistance, which are incomparable with the traditional wallpaper, and can effectively overcome the defects that the traditional wallpaper is easy to raise margins, does not resist dirt and damp, has poor handfeel, and can not be repaired after wrinkling and the like.

The invention belongs to the technical field of high molecular material modification and discloses an energy-saving environment friendly sound insulation flame retardant polyurethane material as well as a preparation method and application thereof. The flame retardant polyurethane material consists of the following components in parts by weight: 100 parts of polyether, 120-145 parts of polyurethane reactive monomer, 4.5-12 parts of foaming agent, 1.5-2.5 parts of foam stabilizer, 20-40 parts of polyester, 0.5-10 parts of compatilizer, 0-2.5 parts of amine catalyst, 0-2 parts of tin catalyst, 10-20 parts of fire retardant, 0-3 parts of flame retardant synergist and 10-20 parts of heat insulation and sound insulation assistant. Compared with the prior art, the energy-saving environment friendly sound insulation flame retardant polyurethane material provided by the invention is light in weight, high in strength, good in waterproof compactness, environment friendly due to no halogen, good in heat preservation, heat insulation and sound insulation effects and good in flame retardance and fireproofness up to the V-0-grade standard of UL-94 when being used as a foam building board. The material can be widely applied to various national economy fields such as the building board and the like.

The invention belongs to the technical field of building materials, and particularly relates to an internal wall putty which comprises the following components in parts by weight: 150-300 parts of white cement, 500-900 parts of calcium carbonate powder, 10-50 parts of grey desert soil, 1-8 parts of cellulose ether, 7-30 parts of polymer latex powder, 1-10 parts of water repellent, 0.05-3 parts of starch ether and 0.5-7 parts of wood fiber. Compared with the prior art, the internal wall putty has the advantages that 107 glue water or 801 glue water is not used, thus formaldehyde is not contained, the environment is protected; and pregelatinized starch is not used, and the water repellent is added, thus the internal wall putty has the function of preventing water and moisture. In addition, with the white cement and the calcium carbonate powder as the strength basis and the grey desert soil as an auxiliary strength material, the strength of the internal wall putty is ensured; due to the synergistic effect of the cellulose ether and the starch ether, the water-retaining property and the application property of the internal wall putty are ensured; and because the polymer latex powder is added, the flexibility of the internal wall putty and the adhesion of the polymer latex powder and the wall are improved.

The present invention relates to high weather resistant water-thinned wall paint, and especially relates to environment friendly high weather resistant water emulsion paint and its preparation process. The paint consists of water emulsion, netted skeleton material, nano functional material, hydrophilic and hydrophobic raedical containing material, solid stuffing and assistant. The preparation principle includes basing on emulsion with excellent performance, constructing netted structure, introduction nano material with UV resisting, photocatalytic and high shielding performance, introducing assistant with both hydrophilic and hydrophobic characteristic to form compact and high-adhesion coating with integrated high weater resistance.

The invention relates to a combined lightweight steel structure building and an assembling method thereof. The combined lightweight steel structure building comprises ground beams, angular upright posts, upright posts, ring beams, sandwich panels, a roof, staircases, doors and windows. The key technical points of the combined lightweight steel structure building are as follows: a plurality of floor bottom girders in parallel are arranged on the ground; four ground beams are arranged on the circumference of each floor bottom girder in turn; bolt fastening sheets which are connected with the ground beams and the ring beams are arranged on joints of upper ends and lower ends of each angular upright post and each upright post respectively; limit baffle plates of wall panels are arranged on angular upright posts and upright posts near the outside of the building; bolt fastening limit treadle bars of the wall panels are arranged on upright posts near the inside of the building; the wall panels comprise wall panels provided with door bodies or wall panels provided with window bodies; metal section supporting layers which are suitable to be connected with balcony bottom girders or / and corridor bottom girders are uniformly distributed between two adjacent floors; metal floor slabs are laid on the metal section supporting layers; and the roof is as follows: a waterproof ridge section is arranged on the upper part of a ridge main girder; the edge of a roof slab is embedded into the ridge section; and a roof slab slot section provided with a drainage channel is arranged on the upper part of a ramp beam of the roof.

The invention relates to one-time sintered super-flat ink-jet penetrating porcelain tiles with three-dimensional decorative effects, and a manufacturing method thereof. According to the manufacturing method, a bottom green brick layer, a priming glaze slurry, a semitransparent glaze slurry, and a transparent glaze slurry are prepared respectively; the bottom green brick layer is subjected to following treatment respectively: a priming glaze layer is formed via priming glaze slurry pouring, jet printing of decorative patterns is carried out, a semitransparent glaze layer is formed via semitransparent glaze slurry pouring, and drying is carried out; obtained green bricks are printed with decorative patterns with ink-jet of penetrating ink and jet printing of a permeation promoter, and are allowed to stand for more than 5min; the obtained green bricks are printed with isolation glaze with water isolating performance via silk-screen printing, and are dried and cooled; the green bricks are coated with the transparent glaze slurry via pouring; the green bricks are subjected to one time sintering so as to obtain one-time sintered ink-jet penetrating porcelain tile semi-finished products with three-dimensional decorative effects; the semi-finished products are subjected to polishing via inelastic module technology so as to obtain the one-time sintered super-flat ink-jet penetrating porcelain tiles with three-dimensional decorative effects.

The invention discloses a new type solid wall paper, its manufacturing method and application. Its feature is that pulpwood formed three-dimensional bass-relief pattern and colorful plate type is used to form the solid wall paper which has various design and color, geometry by monomer jointing, assembling, and arranging. The method includes the following steps: adding solid filling and additive, or any one of wood pulp, bamboo pulp, or their mixture into paper making pure wool pulp; using pulp molding plant and die to product; pulping; forming; drying; shaping; ginning; scratching; brush coating or surface overlaying film to obtain the solid wall paper. It can be used in the decoration for bedroom, drawing room, and public occasion.

The invention provides a 3D (three dimensional) wood printing supply which comprises components in percentage by mass as follows: 60%-90% of wood meal, 3%-15% of ABS (acrylonitrile butadiene styrene) plastics, 4%-15% of PLA (poly lactic acid), 2%-10% of PHA (polyhydroxyalkanoate), 1%-2% of PP (polypropylene) and 1%-2% of a compatilizer. The 3D wood printing supply has the characteristics such as water proofing, corrosion resistance, moisture resistance, freeness of worm damage, mildew and toxicity, acid and alkali resistance, environment protection and the like, the real flavor of wood is diffused; the wood printing supply is fused and deposited by a 3D printer at the temperature of 190-230 GDE C to form various different 3D models, the 3D models have the hand feel, the impression and the fragrance of natural wood and have an effect approaching to a solid wood effect and wood properties, and the printing supply can be nailed, drilled, planed, carved, adhered and painted as wood; and the comprehensive physical properties and chemical properties can be well improved and optimized, the performance requirement of the 3D printer can be effectively reduced, and accordingly, the printing supply is suitable for both high-end printers and low and medium-end 3D printers and has a wider application range.

The invention discloses an energy-saving insulated flame-retardant water-proof corrosion-proof functional coating and a preparation method thereof. The functional coating is prepared from the following raw materials: an aqueous polyurethane dispersion, a flame retardant, a flame-retardant antismoke agent, a hollow glass bead, a wetting dispersant, an anti-settling agent, a thickening agent, water, a leveling agent and a de-foaming agent, has the functions of heat preservation, flame retarding, water prevention and corrosion resistance and the like, is unlikely to become yellow when in use, is safe and reliable, is excellent in performance, is good in compatibility with pigment dyestuff, is unlikely to damage the coated surface, is easy to modify, is nontoxic, is safe to use, does not pollute environment and is suitable for the fields of inner and outer wall coating, pipeline coating, wood furniture coating, decoration coating, chemical corrosion-proof coating and the like.

The invention discloses a polyvinyl chloride (PVC) wood-plastic foaming wood grain section and a preparation method thereof. The wood-plastic foaming wood grain section is prepared from the following raw materials: plastics, an organic filler, an aid, a modifier, a foaming agent, a wood grain masterbatch and the like. The preparation method comprises the following steps of: mixing a foaming mixed material and the wood grain masterbatch and co-extruding from an extruder in a conical twin screw extrusion production line according to a one-step process route; foaming and molding by using a foaming mold; and cooling and shaping by using a shaping mold to obtain the PVC wood-plastic foaming wood grain section. The PVC wood-plastic foaming wood grain section has the advantages of light weight, high specific strength, waterproofness, corrosion resistance and heat preservation, and has the processing characteristic that wood can be nailed, sawed and planed; in addition, the PVC wood-plastic foaming wood grain section has highly simulated solid wood appearance, natural and clear textures, and bright surface color, is an ideal wood-simulated wood-plastic product, and can be widely applied to building, transportation, packaging, home decoration and daily product markets.

The invention discloses a stone papermaking method, which is characterized by comprising the following steps: adding 2 to 2.5 weight percent of auxiliary agent such as stearic acid and the like into 70 to 80 percent of natural inorganic ore powder such as heavy calcium, light calcium, talcpowder, titanium white powder and the like serving as main raw materials to modify the raw materials, adding 18 to 11.5 weight percent of polyethylene and 9 to 5 weight percent of polypropylene into the raw materials, and mixing, plasticizing and kneading the mixture to form a bulk material; and performing double-fold feed on the bulk material, pressing the bulk material into a paper film extruder, injecting 0.5 weight percent of butane and 0.5 weight percent of nucleating agent into the extruder, mixing and heating the mixture, extruding a paper film, then foaming, blowing, drawing, cooling and shaping the paper film to form a paper film base material, and forming a stone paper finished product through corona, coating, drying and finishing. The gram weight of stone paper is reduced by physical micro-foaming technology. The method has the advantages of simple manufacturing process, low cost, dry production, use of few water circulating cooling machines, no three-waste discharge and pollution avoidance.

The invention provides a concrete complex additive which comprises the following components by weight percent: 17.5-58.0% of efficient water reducing agent, 0.5-5.5% of organosilicon waterproofing agent, 0.2-2.5% of organosilicon reinforcing agent, 3.5-25% of polyacrylamide, 1.2-2.8% of triethanolamine, 3.2-6.3% of sodium nitrite, 0.3-1.2% of glycol, 0.6-1.3% of glycerol, 2.8-5.5% of sodium gluconate and the balance of water. The impact resistance, crocking resistance, impermeability and waterproofness of the concrete material can be obviously improved by using the complex additive provided by the application in the preparation process of the concrete, thus the concrete complex additives is especially suitable for the requirement on high-performance concrete for construction of airfield runways or highway bridges.

The multifunctional green nano paint consists of mainly: quaternary methacrylic acid-butyl acrylate-styrene-methyl methacrylate copolymer emulsion 20-65 wt%; nano titania 0.3-5 wt%; nano zinc oxide 0.2-3 wt%; silica 0.3-3 wt%; nano calcium carbonate 0.5-5 wt%; deionized water 3-12 wt%; superfine talcum powder 1-3 wt%; superfine calcium carbonate 3-15 wt%; titanium white3-25 wt%; and assistants including dispersant, wetter, rheologic agent, thickener, color paste, defoaming agent, etc. 2-12 wt%. The paint of the present invention features no toxicity, no pollution, wash resistance, scratching resistance, ultraviolet resistance, ageing resistance, waterproofing and mould proofing as well as self-cleaning function, so that the paint may be used wide in the decoration of inner and outer walls and the anticorrosive treatment of metal material surface.

The invention relates to a high-strength wearable fabric for suitcases and bags and a manufacturing method thereof, which is characterized in that: the fabric is a coated fabric which is woven by adopting the high-strength polyester filament yarn with a strength indicator of more than 7.5cN / dtex and is made through a single-sided coating; the warp yarn adopts high-strength wearable polyester filament yarn air textured yarn, and the weft yarn can be in other filament yarn forms of high-strength polyester filament yarn. The high-strength wearable fabric has the advantages of high tensile strength, high tearing strength, high wear-resisting property, clear printing, good color fastness and good color tone; the fabric also has the properties of watertightness, inflaming retarding, camouflage and infrared ray prevention through the functional finishes. The overall performance of the high-strength wearable fabric is almost the same with that of foreign high-strength nylon fabric, but the price is quite low, thereby the high-strength wearable fabric has a higher cost performance.

The invention discloses a straw light-weight energy-saving insulated building block and a method for producing the same. The method comprises the following steps: using broken straw segments processed by a surface modifier, high strength low-alkali cement, fly ash, superfine active mixed materials and the like as main raw materials; adding various additives such as a waterproof impermeable agent, a preservative, a high-efficiency water reducing agent, an excitant and the like and modified materials to the main raw materials, mixing all the materials evenly, and adding water to the mixture and blending the mixture evenly; molding, demolding and maintaining the mixture to mold the building block (a reinforcing rib of which the surface is provided with a plurality of transverse lug bosses), and coating cement waterproof fluid on the outside; and making protection layers on two sides of the building block with ordinary Portland cement, sand, slag, additives and water so as to obtain the straw light-weight energy-saving insulated building block. The straw light-weight energy-saving insulated building block has the characteristics of light weight, high strength, good thermal insulation property, low water absorption rate, high freeze-melt resistance, fire prevention, water prevention, seepage prevention, insect and mouse damage prevention and the like, and saves 50 percent of energy for a single wall body material in the northern cold areas. Besides, the straw light-weight energy-saving insulated building block can be widely popularized and applied to the field of construction, in particular to the village and small town dwelling constructions in the northern cold areas.

The invention discloses a PVC (Poly Vinyl Chloride) wood-plastic foaming composite and a preparation method of the wood-plastic foaming composite. The PVC wood-plastic foaming composite comprises a PVC wood-plastic foaming base material layer and an ASA (Acrylonitrile Styrene Acrylate) layer which is co-extruded and formed on at least one side of the PVC wood-plastic foaming base material layer, wherein the PVC wood-plastic foaming base material layer comprises the following components in parts by weight: 100 parts of PVC, 50-100 parts of paddings, 1-1.5 parts of coupling agents, 5-7 parts of compound stabilizers, 1.0-1.5 parts of compound foaming agents and 6-8 parts of blowing promoters. The PVC wood-plastic foaming composite disclosed by the invention has the characteristics of light weight, high specific strength, water prevention, corrosion prevention, heat preservation, good weather resistance, low formula cost and low material density, and can be widely used in outdoor product markets such as exterior decoration of buildings, garden landscapes, fences, plank ways and the like.

The invention provides a method for preparing a waterproof ultraviolet-resistant high-strength light and thin fabric. The method comprises the following steps: blending ceramic fibers and triangular special-shaped polyester fibers to form warp yarns, blending spandex fibers and titanium-nickel alloy fibers to form weft yarns, weaving plain weaves or basket weaves serving as a fabric structure to form base cloth; adding colloidal silica sol and nanometer titania sol into a solvent, fully stirring, adding graphene oxide solution, dripping a polystyrene high polymer, homogenizing and stirring so as to obtain a coating finishing agent; washing and airing the base cloth, performing low-temperature plasma treatment so as to obtain modified base cloth in a nitrogen atmosphere; spraying deionized water on the surface of the modified base cloth, wetting, repeatedly coating the coating finishing agent, drying, roasting, washing, well-pressing, and performing tenter setting, thereby obtaining the product.

The invention provides a tunnel structure for a weak and broken high-temperature water-bearing stratum. The tunnel structure comprises a tunnel lining and an inverted arch which form a closed annular structure, the footing of the tunnel lining is connected with the left end and the right end of the inverted arch, drain holes are formed in the footing, and drainage ditches and cable troughs are formed in the connecting portions of the lining and the inverted arch; a traffic lane in a tunnel is arranged on a vibration reduction layer, a bearing platform plate is arranged on the lower portion of the vibration reduction layer and supported by longitudinal beams and cross beams jointly, the longitudinal beams and the cross beams are supported by pile foundations which vertically penetrate through the inverted arch and are inserted into the stratum, the ends of the two sides of the traffic lane, the ends of the two sides of the vibration reduction layer and the ends of the two sides of the bearing platform plate are all disengaged from the positions where the drainage ditches and the cable troughs are located, and the longitudinal beams, the cross beams and the pile foundations are disengaged from the inverted arch. The tunnel structure has the effects of water resistance, thermal insulation and vibration reduction and is compact in structure, high in bearing performance, convenient to construct, lower in construction and maintenance cost and wide in application range.

The invention discloses an insulating refractory material of polymerized silicon and aluminum and the preparation method, applied in construction and industrial facilities, which is characterized in that: excitation, gas evolution and polymerization are carried out for industrial wastes abundant in aluminum oxide, silicon dioxide, and the complex of the silicon dioxide and aluminum oxide, so as to obtain a three-dimensional aluminum silicate minerals with an internal structure made of a plurality of phases from amorphous to semi-crystalline inside, and an internal form in silica tetrahedron and alumina tetrahedron; a plurality of molecules are linked mainly through ionic or covalent bonds, the mechanical properties of the inorganic concretion are externally presented. The raw materials are composed of silicon and aluminum materials as kaolin, fly ashes, coal gangue, cinder, and red mud; without adding any gelled materials, a high temperature and corrosion resistant porous long-chain structure is formed with an intensity over 0.8MPa and a thermal conductivity coefficient of 0.087 (kilocalorie / meter x hour x centigrade). The insulating refractory material is applied not only for the heat insulation wallboards in the building but also for the heat insulation and preservation of the industrial thermal pipelines and facilities.

The invention provides a terylene camouflage waterproof cloth, which is made by the following steps: 170 T terylene cloth is printed with camouflage patterns, then is double-face coated with special PU soft glue, and then is hot-conglutinated with PVC surface material. The terylene camouflage waterproof cloth has the advantages of high strength, good elasticity, desirable resistance to tension and good flexibility, as well as favorable waterproof performance, which are all seen in the PVC surface material; furthermore, the terylene camouflage waterproof cloth has the capacity for being made into garments as of the terylene fabric, and the fabric cloth thus manufactured has the functions of good strength, waterproof performance, resistance to ageing and sea water; therefore, the fabric cloth can be applied to manufacture underwater operation suits or waterproof articles, and enjoy a great variety of application fields.

The invention which provides waste brick tile / straw foam concrete and a preparation method thereof relates to a lightweight building material. The foam concrete is a porous material obtained by mixing more than 90% of a main material comprising industrial and agricultural wastes of waste brick tiles, slag, straws and the like, an additive, a foaming agent and water according to a ratio, stirring,cast-molding and maintaining. The foam concrete which has the functions of light weight, low heat conduction coefficient, heat insulation, sound insulation and fire resistance, water resistance, freezing resistance, cracking resistance, shock resistance and the like and has the advantages of low production cost, simple manufacturing process, realization of onsite casting of prefabricated products, use convenience and safety, changing of wastes into valuables, reaching of energy-saving low-carbon effects, reduction of pollution of the wastes to the environment, ecological environment protection, and nation and civilian benefiting, contributes to the creation of the saving and low carbon society in China.

The invention discloses a terylene outdoor decorative fabric with sun protection. High strength terylene fiber is used to weave into grey cloth, and the finished product is obtained through bleaching, dyeing, anti-ultraviolet processing and post processing. A anthraquinone dye with good light fastness and fastness is used for dyeing, and meanwhile an anti-ultraviole agent is added for treatment. During the post processing, a softener, a waterproof agent and a fire retardant are added to change performance of the terylene decorative fabric. Finally, a layer of titanium dioxide slurry is sprayed on the surface of the decorative fabric so as to improve anti-ultraviolet capability. The terylene outdoor decorative fabric with sun protection provided by the invention not only retains traditional advantages of durablility, lightfastness and good shape preserving, but also has waterproof, fire-retardant, anti-fouling and anti-UV functions, and can be used in an outdoor strong-sun environment.

The invention discloses halogen-free cleaning-free soldering flux for lead-free solder, which comprises the compositions in percentage by weight: 1.5 to 4.5 percent of organic acid activator, 0.5 to 8.5 percent of high-quality abietic resin, 0.3 to 1.5 percent of activated reinforcer, 0.2 to 0.8 percent of surfactant, 3.0 to 15.0 percent of wet strengthening agent, and the balance being solvent isopropanol, absolute ethyl alcohol or deionized water. The soldering flux fully meets various regulation requirements for limiting halogen. The soldering flux developed by using a novel material which does not contain the halogen can scientifically reduce the surface tension of the lead-free solder, strengthen the wetting power of the lead-free solder, improve the solderability, can be compatible with a plurality of welding materials, and has no corrosion effect on lead-free solder alloy; composing materials are volatilized by stages during the welding process, so after the welding, the surface of a PCB board has less residue, even spread, less ion residue, and reliable electrical insulating property, and does not need to be washed; and the soldering flux is a novel environment-friendly halogen-free cleaning-free soldering flux for the lead-free solder.

The invention discloses self-cleaning film and the preparation method; the method provided by the invention and used for preparing the self-cleaning film is that the raw material mixtures are mixed, stirred and put into chlorosilane, alkoxy silane or fluoro-alkyl silanes solutions for self-assembly after film forming and drying; and then the self-cleaning film is obtained. The self-cleaning film and the preparation method are the break through in preparing the self-cleaning coating; the water contact angle of the film is above 150 degrees and the lag angle is less than 20 degrees; meanwhile, the mechanical intensity difference problem of the ultra-hydrophobic coating is effectively solved. The self-cleaning film in the invention has wide application range and can be coated on the surfaces of the materials including vehicle glasses, rearview mirrors, buildings and clothes, ensuring the surfaces of the materials to have the self-cleaning functions of waterproof, antifouling, frost prevention and snow cover prevention.