308results about How to "Improves stain resistance" patented technology

The inveniton provides a hydrophilic modification method for a polytetrafluoroethylene membrane. The method comprises the following steps: step 1, subjecting the polytetrafluoroethylene membrane to plasma treatment under a nitrogen atmosphere, and allowing the surface of the polytetrafluoroethylene membrane to generate relatively-stable free radicals and active sites; step 2, placing the polytetrafluoroethylene membrane into an acylic acid solution and carrying out static impregnation for a period of time, then taking the polytetrafluoroethylene membrane out of the solution and then placing the polytetrafluoroethylene membrane between two glase plates, and carrying out thermochemical polymerization in a vacuum drying oven so as to obtain the polytetrafluoroethylene membrane with the surface grafted with polyacrylic acid; and step 3, subjecting the polytetrafluoroethylene membrane to static impregnation in a titanium dioxide sol for a period of time, and allowing titanium dioxide to be assembled onto the surface of the polytetrafluoroethylene membrane through the coordination effect of metal titanium-ion Ti4+ and a carboxyl group on the polyacrylic acid so as to obtain a hydrophilic modified polytetrafluoroethylene membrane. The hydrophilic modified polytetrafluoroethylene membrane prepared by using the method in the invention retains excellent properties of a conventional polytetrafluoroethylene membrane and greatly improves filter performance, hydrophilic property, pollution resistant property and photocatalytic property of the polytetrafluoroethylene membrane.

The invention discloses a highly-flame-retardant modified acrylate coating. The raw materials for preparing the coating comprise the following ingredients: 65-80 parts of phosphate ester modified acrylic emulsion, 5-10 parts of polysiloxane, 3-10 parts of waterborne polyurethane emulsion, 2-6 parts of resorcinol bis(diphenyl) phosphate, 0.5-1.8 parts of tri-isopropylphenyl phosphate, 10-30 parts of nanometer aluminum hydroxide, 15-32 parts of titanium dioxide, 5-20 parts of nano-silica, 19-35 parts of ammonium polyphosphate, 5-10 parts of dipentaerythritol, 3-10 parts of beta-cyclodextrin, 3-8 parts of an organic solvent, 3-5 parts of a film-forming additive, 2-5 parts of an auxiliary, and 30-60 parts of water. The highly-flame-retardant modified acrylate coating disclosed by the invention is good in flame retardancy, high in heat resistance, high in strength, and long in service life.

The present invention is printed metal plate and its making process. On the surface of coated steel sheet, patterns are first printed with ink fitting the surface coating of steel sheet and through intaglio offset printing, and high temperature cured paint or UV cured paint is then roller coated to the surface of the patterns. The printed metal plate has high decorating effect. Compared with available technology, the present invention has the advantages of environment friendship and low cost.

The invention discloses a hydrophilic oleophobic polymer and preparation method thereof, and application thereof in humidity response oil and water separating membrane. The preparation of the hydrophilic oleophobic polymer comprises the following steps: carrying out an esterification reaction of polyvinyl alcohol and perfluorocarboxylic acid or firstly carrying out a carboxylation of polyvinyl alcohol and then a neutralization reaction of the intermediate product and perfluorotertiary amine. When the product is used, a fabric silk screen is cleaned with ultrasonic sound; 10-50 parts of hydrophilic oleophobic polymer, 50-500 parts of nanometer sol, 1-5 parts of cross-linking agents and 1-5 parts of catalysts are dispersed uniformly; the mixed liquor is dip-coated or spray-coated on the surface of the membrane, and after drying and crosslinking, the humidity response super-hydrophilic and super-oleophobic oil and water separating net membrane. According to the invention, hydrophilic groups are distributed surrounding the hydrophobic chain segment on the surface of the net membrane with humidity responsiveness, and contact angle in the air of the product to water is reduced to 0 degree from more than 90 degrees, and the contact angle in air and water of the product to oil is above 150 degrees, so the product has a low adherence characteristic of droplet. The net membrane is used for separating oil and water mixture and processing oil-containing sewage.

The invention discloses a normal-temperature multiple curing organic-inorganic hybridized aqueous polyurethane woodware coating and a preparation method thereof. The coating mainly contains organic-inorganic hybridized aqueous nano polyurethane latex, a film-forming assistant, a defoaming and foam inhibitor, a flatting agent, a base material wetting agent, a stable dispersing agent, a thickening agent and an aqueous photo initiator, wherein the organic-inorganic hybridized aqueous nano polyurethane latex is prepared by firstly obtaining a polyurethane prepolymer by pre-polymerizing, and then adding an inorganic nano material in an organic-inorganic hybridization way by an in-situ polymerization technology, and finally grafting a photo-curing end-capping agent containing active functional groups and C-C double bonds. The normal-temperature multiple curing organic-inorganic hybridized aqueous polyurethane woodware coating is obtained by adding and dispersing pigment fillings and an assistant evenly in the organic-inorganic hybridized aqueous nano polyurethane latex. The invention not only solves the pollution problem of a solvent-type VOC (Volatile Organic Compound) coating, but also solves the problem of aqueous coatings which have the defects of poor toughness and poor performances in weather resistance, aging resistance, acid resistance, alkaline resistance and solvent resistance.

The invention discloses a paint used for a coiled metal material. The existing paint prepared by polyester resin has the disadvantages that the curing process needs high plate temperature, the energy consumption is high, the paint film is soft, and the scratch resistance, the chemical product resistance, the water resistance, the soiling resistance, the corrosion resistance and the friction resistance are poor. The paint used for the coiled metal material disclosed by the invention comprises the following components by weight percent: 40-55% of saturated polyester resin or epoxy modified saturated polyester resin, 15-35% of pigment, 0-10% of filler, 0-0.1% of de-foaming agent, 0.2-1.0% of wetting dispersant, 0-1.0% of flatting agent, 2-10% of ester solvent, 2-10% of aromatic hydrocarbon solvent, 2-15% of crosslinking agent, 0.1-1.0% of baked paint cooling catalyst, 0-1.5% of extinction powder, and 0.1-0.2% of wax powder. The paint disclosed by the invention has low curing temperature and high curing speed; and the painted film has excellent roughness and rigidity.

The invention discloses high-weather-resistance high-stain-resistance white paint for outdoor woodware and a preparation method of the paint. The high-weather-resistance high-stain-resistance white paint for the outdoor woodware comprises the following components in percentage by weight: 28-32% of water-based pure acrylic emulsion, 28-32% of water-based self-crosslinking acrylic emulsion, 22-27% of titanium dioxide pulp, 0.2-0.3% of a defoaming agent A, 2-3% of a film forming additive, 1.5-2% of wax emulsion, 0.3-0.5% of a light stabilizer, 0.5-1% of nanometer zinc oxide pulp, 0.1-0.15% of a first in-tank preservative, 0.2-0.4% of mildew-proof algaecide, 0.2-0.3% of a substrate wetting agent, 0.2-0.7% of a first thickening agent and 3.85-16.3% of deionized water or purified water. The high-weather-resistance high-stain-resistance white paint for the outdoor woodware is resistant to weather, stain and water, low in smell and VOC and excellent in environmental protection and safety comprehensive performances; the preparation method is simple in process and low in cost.

A process for preparing the F-C emulsion used for paint to obtain the excellent coated film with high weatherability and resistance to dirt and water is prepared the emulsion polymerization reaction between fluorolefine, unsaturated vinyl monomer, vinyl carboxylate monomer and substituent cyclohexyl acrylate monomer in aqueous medium under the action of trigger.

The invention relates to a nano-fiber composite ultrafiltration membrane preparation method based on an electrostatic spinning technology. According to the invention, a high-molecular polymer used for spinning is dissolved in a solvent, such that a spinning solution A with a concentration of 10-30wt% is obtained; a PVA spinning solution with a mass percentage of 7-10% is prepared; a PVA water solution with a mass concentration of 1-6% is prepared; through crosslinking treatment, a PVA coating liquid is obtained; the spinning solution A and the PVA spinning solution is subjected to composite electrostatic spinning, such that a nano-fiber composite membrane is obtained; the membrane is processed under water vapor, and is soaked with a crosslinking bath; the PVA coating liquid is used for coating by using a spin coater; a sealed reaction is carried out under room temperature; the membrane is soaked by using deionized water, and is suspended and air-dried, such that the ultrafiltration membrane is obtained. The surface of the prepared nano-fiber composite ultrafiltration membrane comprises large amounts of hydrophilic groups and active groups. The membrane has good mechanical performances and anti-pollution performances, and is especially suitable for ultrafiltration under ultra-low pressure or even no power. The membrane has high flux and retention rate under low pressure.

The present invention relates to paint industry technology, and is especially one kind of fluoric water-base paint. The fluoric water-base paint consists of fluorocarbon emulsion 20-90 wt%, supplementary emulsion 1-25 wt%, pigment 5-20 wt%, stuffing 1-31 wt%, dispersant 0.1-1.4 wt%, defoaming agent 0.1-0.3 wt%, wetting agent 0.3-0.5 wt%, bactericidal anti-mildew agent 0.1-0.3 wt%, filming assistant 0.01-13.5 wt%, thickener 0.01-1.1 wt% and multifunctional assistant 0.3-0.5 wt% except water. The paint has high weather resistance, high chemical corrosion resistance, antifouling property, high performance/cost ratio and other advantages.

The present invention is printed metal plate with intaglio offset transfer printed patterns and its making process. On the surface of coated steel sheet, patterns are first printed with ink fitting the surface coating of steel sheet and through intaglio offset printing, and high temperature cured paint or UV cured paint is then roller coated to the surface of the patterns. The printed metal plate has high decorating effect. Compared with available technology, the present invention has the advantages of environment friendship and low cost.

The invention discloses a novel inorganic artificial quartzite and a preparation method thereof and belongs to the field of building decorative materials. The novel inorganic artificial quartzite provided by the invention comprises the following raw materials by weight parts: 2-20 parts of inorganic polymer A components, 4-20 parts of inorganic polymer B components, 50-90 parts of aggregates and 0.1-1.0 part of additives. The preparation method provided by the invention comprises the following steps: uniformly stirring the components, such as inorganic polymers, pigments, aggregates, and additives, according to a certain technology, and then performing the processes of distributing materials, vacuumizing, vibrating, pressing and forming, fixing thickness, curing, polishing, cutting, protecting and the like, thereby obtaining the inorganic artificial quartzite. The production technology for the inorganic artificial quartzite is simple; during the production process, a plate surface is free from being cracked and warped; the mechanical property is excellent, the glossiness is high and the hardness is high; and the novel inorganic artificial quartzite belongs to a novel environment-friendly product which can be widely applied to various indoor and outdoor decorative and fitting-out projects.

The invention provides a preparation method for antiskid and anti-wear easily-cleaned ceramic tiles, and relates to the technical field of building ceramics. The antiskid and anti-wear easily-cleaned ceramic tiles are prepared from the following successive steps: preparing a green body layer by pressing, spreading an overglaze layer, preparing a decoration layer by ink jet printing, printing an antiskid and anti-wear layer, preparing an easily-cleaned dry layers, conducting burning, conducting burnishing and polishing edges. Technical problems commonly existing in ceramic archaized tiles in present markets that surface anti-wear strength is not enough, wearing is easy, the antiskid factor is low, cleaning is difficult, dirt hiding is easy and the like are relieved, and technical effects that the prepared antiskid and anti-wear easily-cleaned ceramic tiles have high anti-wear strength, uneasiness to wear and a high antiskid factor, people are effectively prevented from falling, the security of the tiles is improved, meanwhile, the contamination resistance is excellent, dirt is not easy to hide, cleaning is easy, and convenience is provided for daily cleaning are achieved.

The invention discloses a method for preparing an ultralow pressure fouling resistant composite reverse osmosis membrane. A layer of hydrophilic matter is coated onto an ultralow pressure polyamide membrane. The method comprises the following steps: preparing and mixing a polyvinyl alcohol solution, a polyethylene imine solution and a crosslinking agent solution; spreading the mixture onto a polyamide carrier membrane; and obtaining the ultralow pressure fouling resistant composite reverse osmosis membrane after drying. The reverse osmosis membrane has high water flux, a high salt rejection capability and good fouling resistance under the ultralow pressure operation.

The invention discloses a method for preparing an ultralow pressure fouling resistant composite reverse osmosis membrane through chitosan. The method comprises the following steps: dissolving chitosan with the deacetylation degree above 90 percent in acetic acid, and preparing solution A with the mass concentration of 1 to 10 percent after removing solid impurities in the solution; mixing crosslinking agent solution and hydrochloric acid through stirring to form solution B; and finally mixing solution A and solution B, spreading a mixed solution onto a polyamide carrier membrane, and preparing the ultralow pressure fouling resistant composite reverse osmosis membrane after drying. The obtained ultralow pressure fouling resistant composite reverse osmosis membrane has a crosslinked chitosan layer formed on a polyamide layer, thereby improving the hydrophilicity of the reverse osmosis membrane and the fouling resistance of the reverse osmosis membrane, and saving a great amount of power consumption during the operation with ultralow pressure.

The present invention relates to a production method of titanium white paper. Said production method includes the following steps: mixing the titanium white powder and adhesive B to obtain titanium white powder mixed adhesive B; mixing the titanium white powder and adhesive A to obtain titanium white powder mixed adhesive A; impregnating base paper with adhesive; spray-coating titanium white powder mixed adhesive B on one side or two sides of base paper impregnated with adhesive; drying said base paper; then spray-coating the titanium white powder mixed adhesive A on two sides of the base paper coated with titanium white powder mixed adhesive B; drying said base paper; cooling and cutting so as to obtain the invented low-gum white impregnated adhesive film paper finished product.

The invention relates to a sealed self-aligning roller bearing for a high-speed rail and a repair method thereof. The bearing comprises an inner ring, an outer ring, a roller, a holder and a sealed housing, wherein the holder is formed by integral injection moulding of a glass fiber enhanced nylon 66 material and is located on a middle line between the inner and outer rings; the holder is integrally cone-shaped, and the axial section of the single side wall of the holder is /-shaped; roller installation parts are uniformly distributed in the periphery of the holder, and the side face of each roller installation part is a spherical face; the included angle beta between the connecting line of the widest part of each roller installation part and the center of the bearing and the radial section of the bearing is equal to a nominal contact angle. The invention further discloses the repair method of the bearing. According to the structural design, the repaired bearing can be continuously used, so that the maintenance cost of the high-speed rail is effectively lowered, and the service life of the bearing is remarkably prolonged.

The invention provides preparation and catalytic regeneration of a functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane. The preparation method of the functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane is characterized by comprising the following specific steps: dispersing cobaltosic oxide-loaded graphene oxide and a pore-foaming agent into an organic solvent with an ultrasonic wave; adding polyether sulfone to a dispersion liquid, and stirring and dissolving at 75-85 DEG C; standing and defoaming to obtain a casting liquid; scraping the casting liquid at room temperature when the environment humidity is 50%-55% to prepare a liquid membrane; and putting into a water bath at 10-25 DEG C, after the membrane falls off, taking out the membrane, washing, soaking, freezing and drying to obtain the functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane.

The invention discloses a preparation method of an amphoteric polyether sulphone separation membrane. The preparation method specifically comprises the following steps of: 1, taking a polyether sulphone flat ultrafiltration membrane, and removing an additive contained in the polyether sulphone flat ultrafiltration membrane to obtain a clean polyether sulphone flat ultrafiltration membrane; 2, performing plasma modification on the polyether sulphone ultrafiltration membrane obtained in the step 1 by using a controllable low-temperature plasma discharge device to obtain a modified polyether sulphone ultrafiltration membrane; and 3, taking an acrylic monomer, and grafting the modified polyether sulphone ultrafiltration membrane with the acrylic monomer to obtain the amphoteric polyether sulphone separation membrane. The polyether sulphone separation membrane prepared by the preparation method is an amphoteric membrane of which the surface contains amine groups and carboxyl, and the surface hydrophilicity is enhanced, so that the pollution resistance of the membrane is improved; and while the retention rate is increased, the pure water flux is greatly improved, so that the filtration efficiency is improved.

A fluorine-containing aqueous coating composition composed of (A) an aqueous emulsion of a functional group-containing fluororesin obtained by dispersing, in water, a fluoroolefin copolymer having a functional group that is obtained through solution polymerization and (B) a water-dispersible unblocked isocyanate compound is disclosed. The fluororesin aqueous coating composition can be cured at ordinary temperature, and a coating formed therefrom is excellent in chemical resistance, water resistance, solvent resistance, contamination resistance, hardness, weathering resistance and durability.

The invention relates to the field of water treatment and discloses a composite reverse osmosis membrane as well as a preparation method and application thereof. The composite reverse osmosis membrane comprises a supporting layer, a separation layer and a hydrophilic and pollution-resisting layer, which are stacked in sequence, wherein the separation layer is a layer formed by cross-linked polyamide; and the hydrophilic and pollution-resisting layer is a layer formed by carrying out a crosslinking reaction on a polymer containing hydroxyl and a silane coupling agent containing zwitterions. The reverse osmosis membrane provided by the invention not only has relatively high water flux and desalting rate, but also has relatively strong pollution-resisting performance; and the preparation method of the reverse osmosis membrane is simple and has an extremely good industrial application prospect.

The invention provides a double-component transparent glass thermal-insulating coating and a preparation method thereof, wherein the coating consists of a component A and a component B which are mixed in use, wherein the component A comprises water-based modified fluorocarbon resin, nano tin-antimony oxide (ATO) water-based slurry, an auxiliary and the balance of water, the component B comprises a water-based polyurethane curing agent and an environment-friendly diluent. The double-component transparent glass thermal-insulating coating is environment-friendly, weather-resistant, contamination-resistant, easy to clean, high in visible light transmittance, low in infrared transmittance, high in hardness, and good in adhesion force, and the transparent and energy-saving effects can be achieved after the double-component transparent glass thermal-insulating coating is used for various glass.