33results about How to "Good water vapor resistance" patented technology

The invention relates to the chlorine hydride adsorbent, which takes the metallic compounds and the mineral as main materials, and is prepared by roasting under the temperature between 350-800 DEG C, the invention is characterized in that the metallic compounds are composed of the alkali metal and/or alkaline earth metal compounds and transition metal oxide, the content of transition metal oxide is eight percent to twenty five percent according to the weight percentage; the compressive strength of chlorine hydride adsorbent is more than 80N/cm, breakthrough chlorine content is more than forty eight percent under the temperature of 500 DEG C. The chlorine hydride adsorbent of the invention has advantages of wide range of temperature suitability, good purifying degree, high chloride capacity, excellent water tolerance performance and high mechanical strength.

The invention discloses a building waterproof and heat-insulating coating for metal roofs and a preparation method of the building waterproof and heat-insulating coating. The building waterproof and heat-insulating coating is prepared by mixing the following two groups of components: first components: water, a first thickener, a first dispersant, a second dispersant, a wetting agent, a first defoamer, a second defoamer, multifunctional additives, a preservative, a mildew inhibitor, titanium dioxide, composite heat-insulating powder, filler and functional filler; second components: an antifreezing agent, film forming additives, an emulsifier, water, emulsion, a second thickener, a third thickener, a pH value regulator and tributyl phosphate, wherein the composite heat-insulating powder is acompound formed by mixing and dispersing rectorite powder and potassium hexatitanate whiskers and then performing surface modification. The preparation method comprises the following steps: firstly,pre-dispersing the first components to obtain slurry with a fineness of 40-80 microns, then adding the second components for paint mixing, and filtering to obtain a finished product. The building waterproof and heat-insulating coating provided by the invention has advantages of simple production process, low cost, easy construction, short construction period, water-based environmental protection,no toxicity and noninflammability, can be widely applied to water prevention and heat insulation of metal roofs.

The invention provides a preparation method of a novel interface phase material. The method comprises the following steps: preparing silica sol, preparing a citrate stock solution from RE<3+> soluble nitrate and citric acid, and mixing the citrate stock solution with a phosphoric acid solution to obtain a mixed solution; pretreating SiC fibers; dipping the pretreated SiC fiber in the prepared silica sol, dipping, coating and drying, and then keeping in a vacuum furnace at a constant temperature for 1 hour to obtain the SiC fiber with a SiO2 coating on the surface; putting the SiC fiber with the SiO2 coating into the prepared mixed solution, keeping in a constant-temperature water bath for a period of time, washing, drying, and carrying out first heat treatment under the protection of inert gas to form a rare earth phosphate coating on the surface of the SiO2 coating; and performing secondary heat treatment on the prepared sample under the protection of inert gas to form an interface phase with a rare earth pyrosilicate coating on the surface of the SiC fiber.

The invention discloses a zeolite-supported metal type hydrogen and tritium removal catalyst and application thereof. The catalyst is composed of Metal/zeolite, zeolite is used as a carrier, a precious metal is used as an active component, and the weight percentage of the precious metal is less than or equal to 10%. The zeolite-supported metal type hydrogen and tritium removal catalyst is an inorganic hydrogen/tritium removal precious metal catalyst with high room-temperature reaction activity and good water vapor resistance under the condition of low-concentration hydrogen/tritium, and can beflexibly and conveniently applied to passive hydrogen removal in nuclear power stations, hydrogen removal of storage batteries and radiation protection in tritium-containing places.

The invention discloses a composite insulating material for a coal mine cable. The composite insulating material is characterized by being prepared from, by weight, 40-60 parts of EPDM rubber, 40-60 parts of polyolefin elastomer, 60-90 parts of calcined kaolin, 5-10 parts of zinc oxide, 1-3 parts of coupling agent A-172, 2-4 parts of paraffin, 3-10 parts of anti-aging agent, 6-12 parts of paraffin oil, 0.5-1 part of polyethylene wax, 0.5-1 part of stearic acid and 2-10 parts of vulcanizing agents. The composite insulating material for the coal mine cable has the advantages of being good in ozone aging resistant performance and thermal oxygen aging resistant performance, high in elasticity, small in permanent deformation, high in tensile strength, good in calendering performance, low in cost and the like.

The invention aims at the shortcomings that the current culture stones are heavy in weight, high in cost or poor in thermal insulation properties and have poor bondability with the building blocks, masonries and the like, are easily spalled, have short service lives and the like, and provides a rigid polyurethane foam (RPUF) culture stone and a production method thereof. The RPUF product with goodbondability, good thermal insulation property, light materials and long service life is obtained by improving the culture stone raw materials, production steps and technological conditions, which issuitable for the indoor and outdoor decoration in various environments.

The invention belongs to the technical field of syringes, in particular suitable for a drug injection mode for animals, and discloses a pre-filled high-temperature sterilization syringe. The pre-filled high-temperature sterilization syringe comprises a tube cap, a needle tube, a push rod and a piston, wherein the part, near the handle end of the needle tube, of the needle tube is provided with a stop ring, and the front end of the needle tube is provided with an external thread; the tube cap is provided with an internal thread, and the tube cap and the needle tube are assembled through rotation of the threads; the outer diameter of the push rod is matched with the inner diameter of a handle, and the outer diameter of the piston and the inner diameter of the needle tube are in an interference fit for sealing; the stop ring is welded to the part, near the handle end of the needle tube, of the needle tube, and during assembly, the push rod runs through the inner hole of the handle and assembled with the piston so as to form a locking structure after assembly. According to the pre-filled high-temperature sterilization syringe, a filling machine is used to inject a certain amount of drug liquid through the top of the needle tube of the syringe, the tube cap and the needle tube are assembled through rotation of the threads so that sealing and locking can be achieved, and the syringe is delivered into a sterilization chamber for steam sterilization at a high temperature of 121 DEG C for 30 minutes.

The invention relates to a reduction catalyst technology, in particular to a load type ozone nanometer type reduction catalyst and a manufacturing method thereof. The invention is characterized in that each kilogram of superfine or nano activated carbon is added with 27g-725g of manganous nitrate, 73g-590g of copper nitrate, 0.019g-0.093g of palladium nitrate and 650g-850g of deionized water, andthe mixture is dipped for 0.5 to 1 hour, dried in a constant temperature drying device, then roasted for certain time at set temperature and manufactured into the load type nano catalyst after being cooled.

The invention provides a Si<3>N<4>/SiON composite film, a laser chip and a preparation method. The film layer stress of a Si<3>N<4> film layer prepared by a PECVD method is negative stress, while thefilm layer stress of a SiON film layer prepared by the PECVD method is positive stress. By enabling the Si<3>N<4> film layer with negative stress to be compounded with the SiON film layer with positive stress, the Si<3>N<4>/SiON composite film with relatively low stress is formed, thereby lowering a stress overlaying effect in the chip preparation process; and in addition, the Si<3>N<4> film layerand the SiON film layer both have relatively high water vapor resistance performance, so that the prepared Si<3>N<4>/SiON composite film obtains both of water vapor resistance performance and low film stress performance, so that performance requirement of a high-speed laser chip is satisfied.

The invention discloses modified polyphenyl ether-enhanced plastic, which is prepared from the following components in parts by mass: 50 parts of polyphenyl ether, 8-10 parts of glass fiber, 3-5 parts of polystyrene, 3-5 parts of a hydrogenated styrene-butadiene segmented copolymer, 2-3 parts of polybutadiene, 1-2 parts of low-density polyethylene and 1-2 parts of phenyl benzoyl carbinol. In the manner, the modified polyphenyl ether-enhanced plastic has the advantages of good dimensional stability, good electrical insulating property, wide using temperature range, good moisture resistance, high strength, high hardness, good rigidity, high impact strength, good corrosion resistance, good self-lubricating property, good solvent resistance, safety, practicability and the like, and has a wide market prospect in popularization of the modified polyphenyl ether-enhanced plastic.

The invention discloses a preparation method of a nitric acid industrial carbon emission reduction catalyst. The method comprises the following steps: 1, dissolving an active component precursor and an auxiliary agent precursor in deionized water to obtain a transparent dipping solution; 2, adding the cerium dioxide powder into a dipping solution for dipping treatment, and drying to obtain a catalyst precursor; 3, uniformly mixing an adhesive, a pore forming agent and the catalyst precursor, adding water, kneading, and carrying out extrusion molding to obtain a catalyst blank; and 4, drying the catalyst blank, and roasting to obtain the nitric acid industrial carbon emission reduction catalyst. According to the present invention, the types and the proportions of the active components and the auxiliary agent are designed, and the roasting treatment process and the process parameters are controlled so as to obtain the catalyst with the relatively dispersed active components and the high crystallinity, such that the number of the effective active centers in the catalyst is increased so as to improve the activity of the catalyst, and the catalyst has better high-temperature stability and is suitable for N2O emission reduction in the nitric acid production process.