7results about How to "Water resistant" patented technology

The subgrade anti-settlement structure is characterized in that a lower drainage layer has water resistance and is stacked on a cushion layer, and a lower geotechnical grid is arranged on the lower drainage layer; and the upper drainage layer is arranged on the lower geotechnical grid. The structural strip is embedded in the middle of the first rubber strip in the thickness direction and arranged in the width direction of the first rubber strip. According to the roadbed anti-settlement structure provided by the utility model, the strength of the first adhesive tape in the width direction is enhanced through the structural strips, and the structural strength of each grid in the lower geotechnical grids can be enhanced. By means of the lower geotechnical grid with the reinforced structure, the whole strength of the upper drainage layer is guaranteed, meanwhile, the toughness of each grid in the lower geotechnical grid is improved, and the possibility that the upper drainage layer is abnormal in structure is lowered. Reinforcement is achieved through compounding of the upper geotechnical grid, and the structural strength of the pavement layer is improved. Meanwhile, the structural stability of the upper drainage layer is improved, and the sedimentation possibility is reduced.

The present application relates to a kind of palladium-based methane combustion catalyst and its preparation method and application, the preparation method includes the following steps: after obtaining mixed sol by mixing titanium source, cerium source and complexing agent, evaporate, dry and sinter in sequence, obtain cerium titanium carrier;The palladium-based methane combustion catalyst is obtained by impregnating mixed cerium titanium carrier and palladium source, and then drying and calcining in sequence.The preparation method of the present application is simple, and raw materials are cheap and easy to obtain.The palladium-based methane combustion catalyst prepared has low light-off temperature, and has water resistance, which can be applied to the treatment of methane in tail gas.

The invention discloses a platinum-iron-molybdenum catalyst with high activity and stability as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalysis. The preparation method comprises the following steps: dissolving ferric nitrate, ammonium molybdate and citric acid in water, mixing, and adjusting the pH value to be less than 1.0; carrying out water bath gelation on the solution, drying, and calcining in a tubular furnace to obtain an iron molybdate carrier; mixing a platinum source with the iron molybdate carrier, drying by distillation in an oil bath, and calcining in a muffle furnace after drying to obtain the platinum-iron-molybdenum catalyst. The platinum-iron-molybdenum catalyst prepared by the preparation method disclosed by the invention can show efficient catalytic activity and excellent stability in propane oxidation reaction no matter whether the platinum cluster prepared in advance or the precursor salt of direct wet impregnation platinum is loaded.

This invention provides a water-based coating for anti-slip and heat-resistant bamboo mats. The coating comprises a water-based penetrating primer layer, a water-based colored topcoat layer, a water-based water-resistant and heat-resistant coating, and a water-based anti-slip and wear-resistant coating. These four layers are sequentially applied to a bamboo substrate. This invention consists of four coating layers, which, when applied to a bamboo substrate, endow the bamboo product with excellent anti-slip, wear-resistant, water-resistant, and heat-resistant properties.

The present invention provides a solid carbon dioxide recovery material having durability capable of long-term use, particularly repeated use with a water-containing gas as an object, and for this purpose, the solid carbon dioxide recovery material of the present invention contains iron, sodium, and crystalline carbon, and more specifically, contains sodium ferrite, crystalline carbon, and at least one binder selected from the group consisting of amorphous carbon, polyamide-imide, polyester, epoxy resin, polyurethane, and acrylic resin.

The application discloses a preparation method of an intrinsically flame-retardant high-elasticity styrene-acrylic emulsion, which comprises the following steps: preparing a phosphorus-nitrogen integrated functional compound by using glycine, polyformaldehyde and dimethyl phosphite as raw materials; performing acyl chloride modification on the phosphorus-nitrogen integrated functional compound by using sulfoxide chloride; preparing a high-flexibility flame-retardant monomer by reacting the acyl chloride modified phosphorus-nitrogen integrated functional compound with a phenolic hydroxyl cashew phenol; and finally preparing the flame-retardant high-elasticity styrene-acrylic emulsion by reacting the high-flexibility flame-retardant monomer, styrene, butyl acrylate and acrylic acid in a cationic etherified starch aqueous solution. The emulsion has the multiple advantages of flame retardation, high elasticity, soap-free, water resistance and the like, is green and environment-friendly, low in cost, and has a wide application value.

This utility model provides a waterproof sealing structure for high-voltage wiring harnesses, relating to the field of high-voltage wiring harness technology. It includes a collar fitted onto the outer wall of the high-voltage wiring harness, the collar being slidably connected to the harness. A rubber sleeve is provided on the inner wall of the collar, and the rubber sleeve is glued and fixed to the collar. Multiple rubber dots are provided inside the rubber sleeve, fixedly connected to the rubber sleeve with one side contacting the outer wall of the high-voltage wiring harness. A telescopic cylinder is provided on the right side of the rubber sleeve, glued and fixed to the rubber sleeve. A connecting ring is provided on the side of the telescopic cylinder away from the rubber sleeve, fixedly connected to the rubber sleeve. A flared cylinder is provided on the right side of the connecting ring, glued and fixed to the connecting ring. This utility model, through the tight fit between the rubber dots and the outer wall of the wiring harness, the wrapping of the flared cylinder with the connector, and the bonding of the adhesive layer to the mounting surface, forms a three-dimensional sealing system of "wiring harness body → connector → mounting surface," effectively blocking the path of moisture penetration.