42results about How to "Not easy to remove powder" patented technology

The invention discloses a palladium alumina for production of hydrogen peroxide by an anthraquinone process. The catalyst comprises gamma-Al2O3 as the carrier, the content of which is over 97wt%; and metal palladium as the main active component, the loading of which is 0.1wt%-0.5wt% and the dipping thickness of which is from 10 micrometers to 100 micrometers. The invention also discloses a preparation method of the catalyst, and the method consists of: roasting aluminum hydroxide, mixing the roasted aluminum hydroxide with pseudoboehmite, then adding a pore-expanding agent for molding, conducting surface treatment so as to obtain a catalyst carrier, then performing pre-spraying on the carrier with a locating agent, carrying out drying, and then putting the carrier into a chloropalladate solution for dipping. With appropriate specific surface area, pore volume and pore size distribution, the palladium catalyst provided in the invention is difficult to shed and fragment. In actual production of hydrogen peroxide by an anthraquinone process, the catalyst shows excellent balance between activity and selectivity, as well as good service life and regeneration cycle.

The invention relates to a preparation method of a high-heat-resistance vinylidene fluoride polymer mixed coating diaphragm, the high-heat-resistance vinylidene fluoride polymer mixed coating diaphragm prepared by the method and a lithium battery comprising the high-heat-resistance vinylidene fluoride polymer mixed coating diaphragm. The prepared high-heat-resistance vinylidene fluoride polymer mixed coating diaphragm has good heat resistance and air permeability and is formed by one-time coating with simple process. The vinylidene fluoride polymer improves the adhesion between the coating andthe diaphragm and between the coating and the pole pieces, increases the liquid storage capacity of the electrolyte and improves the cycle performance of the lithium battery. The heat-resistant additive forms a heat-resistant network layer with ceramics to improve the heat shrinkage performance of the diaphragm.

The invention relates to a novel emulsion paint which comprises the following components in percentage by weight: 8.5% of ultramarine, 0.2% of cellulose, 0.07% of humidizer, 0.6% of dispersing agent, 4.2% of titanium white, 17.7% of silicon dioxide superfine powder, 5.7% of kaolin, 7.1% of calcium carbonate light, 7.1% of sierozem, 2.8% of talcum powder, 14.2% of poval, 14.2% of high polymer emulsion and 17.63% of water. The novel emulsion paint has the advantages of ageing resistance, high strength, wet rub resistance, flat and smooth surface and the like, and has less possibility of shedding; after the novel emulsion paint is used for a long term, no splitting phenomenon occurs; and due to high density, the novel emulsion paint has better stain resistance.

The invention discloses a wrapping layer, a medium trace element-containing externally-wrapped stable fertilizer with the wrapping layer and a preparation method of the medium trace element-containingexternally-wrapped stable fertilizer. The wrapping layer comprises an inhibitor, and the inhibitor is formed in the wrapping layer by spraying an acid liquor containing the inhibitor. The inhibitor in the wrapping layer is formed in the wrapping layer by spraying acid liquor containing the inhibitor; the inhibitor is added in the form of being dissolved in the acid liquor; compared with solid state, the advantages are that, uniform dispersion of the inhibitor can be ensured in the mixing process; therefore, the inhibitor is uniformly dispersed in the wrapping layer; the wrapping layer can befirmly attached to the surfaces of fertilizer particles; falling off is not easily caused, the actual content of the inhibitor in the obtained fertilizer is more consistent with the theoretical content, and it is ensured that the fertilizer is high in nutrient utilization rate; in addition, due to the addition of the acid liquor, the fertilizer has certain acidity, and when the fertilizer is usedfor alkaline soil, the effects of adjusting the pH value of the soil and improving the soil can be achieved, fertilizer using amount can be reduced, the efficiency can be improved, the crop yield canbe increased, and the crop quality can be improved.

The invention relates to the technical field of gas pipeline fire prevention, in particular to a pipeline coating and a preparation method thereof. The pipeline coating is prepared from MOFs, vermiculite, an organic solvent and a bonding agent. The preparation method of the pipeline coating comprises the steps of dissolving the MOFs powder in the organic solvent to obtain a settled solution; adding vermiculite powder into the settled solution to obtain suspension liquid; adding the bonding agent into the suspension liquid and conducting spray granulation to obtain powder; spraying the powder onto the surface of a pipeline through a plasma spraying method to form the pipeline coating. The connection strength of the coating and metal is reinforced through powerful chemical bonds formed between the MOFs and the metal, and the phenomenon of powder stripping of the coating is avoided. As the MOFs is formed by arranging long-rage ordered crystal grains in microstructure, the pipeline coatinghas the good compactness, and the problem of cracking of the coating is solved. Meanwhile, through combination with the vermiculite, the pipeline coating can release crystal water contained in vermiculite layers when heated, thereby achieving the fire prevention effect.

The invention provides a polyvinyl alcohol graft copolymer which comprises a polyvinyl alcohol main chain, and a branched chain of the polyvinyl alcohol graft copolymer comprises a structural unit derived from the following monomers: (a) a fluorine-containing olefinic unsaturated monomer and (b) an olefinic unsaturated carboxylic acid monomer. The invention also provides a water-based adhesive composition containing the polyvinyl alcohol graft copolymer and an electrode slurry composition containing the polyvinyl alcohol graft copolymer. An electrode plate prepared from the polyvinyl alcohol graft copolymer has the beneficial properties of good adhesive force, low water absorption and the like, and is not easy to crack.

The present invention discloses an environment friendly indoor latex paint, relates to the field of paints, and particularly relates to an environment friendly indoor latex paint. The environment friendly indoor latex paint is good in environment friendly effect, can absorb formaldehyde, and is strong in anti-bacterial and anti-cracking abilities. The environment friendly indoor latex paint includes: 20-30 parts of vinyl acetate-acrylic emulsion, 10-15 parts of light calcium carbonate, 10-15 parts of wollastonite powder, 5-10 parts of epoxy resin, 5-10 parts of organic bentonite, 1-2 parts of silane coupling agent, 1-5 parts of n-butanol, 1-2 parts of organosiloxane, 0.1-0.5 part of tricarboxylic benzoic acid, 1-5 parts of hydroxyethylcellulose, 30-50 parts of deionized water, 1-2 parts of photocatalyst and 2-3 parts of bamboo charcoal powder.

The invention discloses a method for preparing a getter, and belongs to the technical field of getter preparation. In the present invention, ferric oxide is rusted into ferric oxide, mixed with aluminum powder and magnesium powder, put into a closed box, added with magnesium tape, aerated with oxygen, ignited with magnesium tape for reaction, and then acid-washed and alkali-leaked and baked After drying, it is soaked in an organic polar solvent, mixed and reacted with a foaming agent, and calcined in a muffle furnace to obtain a getter. The beneficial effects of the present invention are: the preparation steps of the present invention are simple, the strength of the obtained product is increased by 40-45%, and it is not easy to break, loosen and powder off after use; the air absorption rate is 15% higher than that of other products, the air absorption capacity is sufficient, Good ability.

The present invention discloses an environmental-protection type external wall latex paint formula, wherein the environmental-protection type external wall latex paint comprises, by mass, 1-3% of a coloring agent, 0.5-1% of a preservative, 15-20% of a filler, 1-2% of a dispersant, 1-3% of a wetting agent, 0.5-1% of a defoamer, 1-2% of a film forming additive, 0.5-1% of a bactericidal agent, 2-3% of a thickener, 50-70% of an emulsion, and industry purified water.

The invention discloses a preparation method for acrylonitrile copolymer type water blocking yarns. The preparation method comprises the following steps: adding starch and sodium chloride to a mixed solution of water and epichlorohydrin, stirring, adding a potassium hydroxide solution in a dropwise manner, carrying out a reaction, and carrying out a post-treatment to obtain cross-linked starch; sequentially adding a ferrous sulfate solution, acrylonitrile and hydrogen peroxide to the cross-linked starch aqueous solution, carrying out a heating reaction, and carrying out a post-treatment to obtain powdery acrylonitrile copolymer; impregnating synthetic fiber filaments in water in which the acrylonitrile copolymer is dispersed; and taking the obtained material, and drying to obtain the acrylonitrile copolymer type water blocking yarns. With the technical scheme, the invention provides the preparation method for the acrylonitrile copolymer type water blocking yarns, and the obtained acrylonitrile copolymer type water blocking yarns have the following characteristics that: a longitudinal water blocking effect is good; a high rate water absorption resin is firmly combined with the synthetic fiber filaments, such that powder shedding is not easily generated during use, no adhesion is generated, and a service life is long. In addition, the preparation method of the present invention has characteristics of simple production process, stable technology performance, strong practicability, and wide application.