4018results about How to "Good acid and alkali resistance" patented technology

The invention discloses a low-temperature selective catalytic reduction denitration catalyst and a preparation method thereof, wherein the catalyst takes an attapulgite as a carrier to load nano-composite materials of manganese oxide nano-particles; the structure thereof is as follows: manganese oxide particles with the particle diameter of less than 20nm are loaded on the rod-shaped crystal surface of the attapulgite with the diameter of 40-50nm; one or more types from iron, copper and nickel are added as an additive; and calculated according to the mass percentage of manganese, the content of the manganese oxide in the catalyst is 0.1-20. The preparation method comprises the steps of: firstly extruding, drying and crushing the attapulgite clay, and then preparing attapulgite clay powderinto suspension liquid; adding acid solution to wash and remove carbonate impurities, adding manganese salt, and then adding alkali solution for stirring so as to lead the manganese ion to be hydrolyzed and precipitated and loaded onto the crystal surface of the attapulgite, and finally obtaining the product after centrifugal washing, dewatering, drying and calcinations. The catalyst takes ammoniaas a reducing agent, and has higher activity of catalyzing NH3 and reducing NO reaction within the scope of 120 DEG C to 350 DEG C.

The invention provides an electromagnetic shielding conductive coating and a preparation method thereof. The electromagnetic shielding conductive coating comprises film-forming substances, conductive powder, thickening agents, coupling agents and curing agents. The mass ratio of the film-forming substances to the conductive powder to the thickening agents to the coupling agents to the curing agents is 5-20:50-75:5-30:0.7-4:6.5-15. Auxiliaries are added into the film-forming substances and stirred to be completely dissolved, the thickening agents are added into mixture, the coupling agents are then added into the mixture, the conductive powder is added into the mixture after stirring, and the curing agents are added into the mixture, so that the electromagnetic shielding conductive coating is obtained. By means of composition and proportioning for the conductive coating, the prepared coating is excellent in electric conductivity and resistant to acid, alkaline and oxidization. Besides, the resistivity of the conductive coating prepared by the preparation method is continuously reduced, and conductive high molecular polymer for the conductive powder in the conductive coating is well compatible with organic resin, so that air bubbles and needle holes in the coating can be decreased.

The invention relates to a colored aluminum pigment with high color depth and a preparation method thereof. The colored aluminum pigment is obtained by depositing a layer of silicon dioxide on a flaky metallic aluminum sheet substrate and then depositing one or more layers of metal oxide on the surface of the silicon dioxide, and the colored aluminum pigment exists in the form of dry powder. The preparation method comprises the following steps: a. stirring to disperse commercially available aluminum pigment slurry in alcohol, alcohol ether or a ketone solvent; b. regulating the temperature to 30-80 DEG C, respectively adding tetraethoxysilane and aqueous solution to the dispersed aluminum pigment slurry with the mol ratio of the tetraethylorthosilicate to the water ranging from 1:0.5 to 1:20, adding a catalyst such as ethylenediamine solution or aqueous ammonia, and obtaining aqueous aluminum pigment slurry by vacuum filtration and washing after the reaction; and c. cladding the aqueous aluminum pigment slurry obtained in the step b with the hydrated metal oxide on the powdered aluminum surface in a liquid phase. The preparation method help prepare the colored aluminum pigment with diversified colors and high color depth without reducing brightness of the original aluminum pigment slurry.

The invention discloses a nonionic waterborne polyurethane dispersoid and a preparation method thereof. The dispersoid is mainly made from raw materials of A) diisocyanate, B) one or more than two polyols containing at least two hydroxy groups, wherein number average molecular weight of the polyols is 1000-4000, C) a small molecule chain extender and / or a small molecule cross-linking agent, D) methoxy polyethylene glycol with medium-low molecular weight, and E) one or more than one polyamines with number average molecular weight smaller than 500. According to the invention, the prepared dispersoid is with a small particle size, has long storage time and has great stabilities of acid tolerance, alkali tolerance and salt tolerance, and the like.

The invention discloses a heavy-duty anticorrosive coating for flue gas desulphurization equipment and a preparation technology thereof. The heavy-duty anticorrosive coating comprises components of a novolac epoxy vinyl ester resin, a plasticizer, a diluent, a curing agent, a promoter, glass flakes, rutile titanium dioxide, nano-silica, alumina powder, silicon carbide, talcum powder and auxiliary agents. The preparation technology comprises that the components are dispersed by a high-speed dispersion kettle and then are mixed into the heavy-duty anticorrosive coating. The heavy-duty anticorrosive coating is convenient for construction, can be cured at a normal temperature, has good mechanical properties and excellent anti-permeability performances, is stable in an acid medium for a long time and has good protection effects on a matrix material.

The present invention is a treatment method for naphthalene dye intermediate H-acid production wastewater. After H-acid pretreatment wastewater is preprocessed, organic compounds such as, 1-amido-8- naphthol-3, 6-disulfonic acid (H-acid) and intermediate products, are adsorbed on the resin through alkalescence macroporous adsorption resin; the adsorbed water is added with lye for desorption regeneration and the regenerated liquid will be back into the previous production process for application. The CODcr of the treated wastewater can be effectively reduced to reach the national emission standards; the reclaimed H-acid sodium salt can be used. The resin can be desorbed and regenerated through lye for repeated use. The desorbed liquid is distilled and reclaimed, and the distilled effluent can be used repeatedly. The H-acid sodium salt and the intermediate products reclaimed through the invention can be used as raw materials for the original production process; therefore, the invention not only helps treating wastewater but also realizes waste resource utilization.

A zinc-rich epoxy anti-corrosion coating, including a component A, capable of being cured into a film, and a component B containing a curing agent; component A contains, by weight percentage, graphene (0.1-5wt%), zinc powder (0-35wt%), filler (30-70wt%), 10-20wt% epoxy resin having 54wt% solids content, and solvent (10-20wt%), wherein the sum of the weight percentages of the graphene, zinc powder and filler is 60-80wt% and the sum of the weight percentages of all components of compenent A is 100wt%. The present invention adds graphene into an anti-corrosion coating, thus decreasing the thickness of the coating film, increases the anti-corrosion effect while decreasing zinc powder contents, reduces the amount of zinc oxide vapor generated during welding, and is environmentally friendly.

The invention provides a preparation method of a super-hydrophobic coating layer. The preparation method includes the steps of: 1) according to mass percentage of a final solution, dissolving 0.5-10% of hydrophobic nano particles and 1-15% of hydrophobic resin in a solvent, performing ultrasonic dispersion for 15-60 min to obtain a mixed solution; 2) forming the mixed solution on the surface of a substrate material and in internal microstructures of the substrate material; 3) naturally air-drying the substrate material to form the super-hydrophobic coating layer. According to the method, the preparation process of the coating layer is free of assistance of external equipment, such as heating and the like, so that the method is simple and low-cost. The method can achieve preparation of the super-hydrophobic coating layer on various fiber surfaces and porous material surfaces, has excellent universality and is easy to achieve in industrial large-area preparation.

The invention discloses a printing strippable protective ink, and a preparation method and application thereof. The ink comprises the following components in parts by weight: 50-80 parts of thermoplastic film-forming resin, 20-50 parts of low-viscosity plasticizer, 1-10 parts of filler and pigment, and 1-3 parts of functional assistant. The printing strippable protective ink has 100% solid rate, does not volatilize any solvent, is a green environment-friendly material, and satisfies the increasingly higher ecological environmental requirements. The ink has the advantages of no irritating smell, moderate viscosity and no voids, is not sticky to the printing screen, and is easy for printing operation; the ink can form a film by thermosetting at medium / low temperature, so the energy consumption is low; the thermosetting film has high flexibility, favorable heat resistance, favorable insulativity and favorable acid / alkali resistance, and effectively solves the influence on the resistance when etching the circuit on a transparent conductive film with acid and alkali in the touch screen manufacturing process; and after the conductive film protecting technique is finished in the touch screen manufacturing process, the protective ink layer can be easily stripped, and does not leave any residue, thereby effectively solving the problem of protection of the conducting film in the existing touch screen manufacturing process.

Disclosed is a graphene masterbatch including a base resin, electrically conductive carbon black, graphene nanoplatelets with modified surface and a dispersant. The modified surface of graphene nanoplatelet is formed by a modifying agent containing a coupling compound so as to possess hydrophobic and hydrophilic functional groups, which help graphene nanoplatelets form chemical bonding with carbon black and the base resin. Since the modified surface makes graphene nanoplatelets evenly dispersed in the base resin, the graphene masterbatch of the present invention is suitably melt blended with a polymer material to form a composite material such that graphene nanoplatelets are evenly dispersed in the polymer material, thereby enhancing junction strength, increasing mechanical properties, and improving anti-oxidation, acid / base resistance, and thermal conductivity.

The invention discloses a method for preparing a novel aluminum-based composite lead dioxide-manganese dioxide anode for zinc electrodeposition, which is characterized by sequentially plating conductive coating, an alpha-PbO2-CeO2-TiO2 layer and a beta-PbO2-MnO2-WC-ZrO2 layer outside an aluminum matrix of a composite lead dioxide-manganese dioxide anode from inside to outside. The method comprises the following steps of: carrying out quenching, oil removal and sand blasting processing on the aluminum matrix; spraying the conductive coating on a matrix material; then carrying out alkaline composite plating on the alpha-PbO2-CeO2-TiO2 layer and carrying out acidic composite plating on the beta-PbO2-MnO2-WC-ZrO2 layer to obtain the composite lead dioxide-manganese dioxide anode. The aluminum-based composite lead dioxide-manganese dioxide anode manufactured by the process and method of the invention can obviously reduce the voltage of an electrode bath and energy consumption; and meanwhile, a plating layer and a matrix have strong binding force and small internal stress, and the service life of an electrode is long.