42results about How to "Excellent water vapor resistance" patented technology

The present invention relates to a synthesis method of tetrapropylene fluorine rubber. The main improvement point is that, in the process of preparing tetrapropylene fluorine rubber by emulsion polymerization method, the bromine-containing monomer of vulcanization point is added by using tetrafluoroethylene and propylene monomer as raw materials. or iodine alkenes, select I(CF 2 ) n I is a chain transfer agent, wherein n is an integer of 2-6. The tetrapropylene fluorine rubber obtained by the method of the invention has the characteristics of low Mooney viscosity, high tensile strength and low permanent compression deformation, and has excellent water vapor resistance and alkali resistance characteristics. The method of the present invention adopts water as the medium to carry out the reaction, and through the selection of the chain transfer agent and the initiator, the tetrapropylene fluorine rubber with excellent performance can be obtained only by adding the vulcanization point monomer, without adding other various Additives, saving raw material cost and simple operation.

The invention relates to a PEEK-modified polyurethane infrared and ultraviolet fully shielding waterborne transparent thermal insulating paint. The PEEK-modified polyurethane infrared and ultravioletfully shielding waterborne transparent thermal insulating paint is composed of PEEK-modified waterborne polyurethane resin, solubilizer, substrate accelerator, nanometer transparent thermal insulatingagent, nanometer photocatalysts, transparent nanometer pigments, auxiliaries and water, wherein the PEEK-modified waterborne polyurethane resin is prepared by synthesizing amine-modified PEEK, low-polymer polyols, diisocyanate and hydrophilic modifier into a prepolymer under the action of catalysts and then performing alcohol and amine chain extension. The prepared PEEK-modified polyurethane infrared and ultraviolet fully shielding waterborne transparent thermal insulating paint is excellent in adhesion force, corrosion resistance, ageing resistance, humidity and heat resistance, wearing resistance, self-cleaning properties, radiation resistance, static resistance, fire resistance and mechanical performance, reaches a visual light transmittance near to 70%, capable of fully shielding ultraviolet and infrared rays and significant in thermal insulating performance. Therefore, the PEEK-modified polyurethane infrared and ultraviolet fully shielding waterborne transparent thermal insulating paint can be widely applied to surface thermal insulation and protection of building glass, vehicle glass, engineering plastics, steel structures and cement.

The invention relates to a synthesizing and recycling technology for waste plastic cements and recycled asphalt concrete. The synthesizing and recycling technology is characterized in that the waste plastic cements are recycled and made into rubber particles, and then the rubber particles are blended with the recycled asphalt concrete according to a mass ratio of 1:5.6 through the rubber asphalt processing equipment. The synthesizing and recycling technology has the advantages of making full use of the waste plastic cements and waste asphalt concrete, avoiding wasting of resources and pollution to environments, saving cost and simultaneously solving the problems that roads paved by conventional asphalt concrete are easy to age, the conventional asphalt concrete easily results in reflection cracks of road surfaces, and the using function of the road surface is seriously affected by cracking, slurry spurting, loosening and the like of the conventional asphalt concrete in a using process.

The invention relates to a denitrification treatment method for flue gas discharged from an ethylene cracking furnace. The flue gas flows sequentially through a radiation section, a convective heat exchange section A, an ammonia injection grid, a convective heat exchange section B, an SCR denitrification reaction section and a convective heat exchange section. C, the preparation method of the catalyst filled in the SCR denitration reaction section is as follows: (1) Add carbon black powder and cerium nitrate to the ethanol solution containing silicon source, mix under ultrasonic dispersion conditions, separate solid-liquid, and carry out solid phase Dry to obtain silicon and cerium modified carbon black powder; (2) Add modified carbon black powder to ethanol solution containing titanium source, add dilute nitric acid solution to form sol-gel, and then treat at high temperature in an oxygen-free atmosphere , roasted in an oxygen-containing atmosphere to obtain a macroporous titania carrier containing silicon and cerium; (3) After mixing the titania carrier, molecular sieve and active component precursor, molding it to obtain a honeycomb denitration catalyst. The method of the invention has good denitrification activity, strong ability to resist water vapor, the catalyst is not easy to crack, and the service life is long.

The invention provides a formula and a production process of a dual-layer thermal shrinkage-chilling shrinkage composite sleeve which comprises an inner sleeve and an outer sleeve, wherein the inner sleeve comprises an ethylene vinyl acetate copolymer, low-density polyethylene, a maleic anhydride grafted polymer, a surface treatment ultrathin active magnesium hydroxide, surface treatment ultrathin active aluminium hydroxide, a lubricating agent, an antioxygen, a light stabilizer and a sensitive cross-linking agent; and the outer sleeve comprises ethylene propylene diene monomer, ultrathin surface treatment active kaoline, ultrathin surface treatment active talcum powder, a lubricating agent and colorant. The dual-layer thermal shrinkage-chilling shrinkage composite sleeve obtained by the production process has no gap between the inner sleeve and the outer sleeve and high connection reliability; and the inner sleeve has good elasticity, weather resistance, ozone resistance, heat resistance, acid and alkaline resistance, water vapor resistance, corona resistance and high electric insulation property.