6results about How to "Dilute oxygen concentration" patented technology

The application belongs to the field of high polymer materials, and particularly discloses a modified basic magnesium carbonate and a PA12 composite material and a preparation method thereof.The preparation method of the modified basic magnesium carbonate comprises the following steps: adding sodium carbonate and magnesium chloride into a sodium hydroxide solution to perform a water bath reaction to obtain the basic magnesium carbonate; adding the basic magnesium carbonate and acrylic acid into deionized water to perform a water bath reaction to obtain acrylic acid modified basic magnesium carbonate; and adding the acrylic acid modified basic magnesium carbonate, glycidyl methacrylate and an initiator into an organic solvent aqueous solution to perform a water bath reaction to obtain the modified basic magnesium carbonate.The modified basic magnesium carbonate prepared by the application can decompose and absorb heat at high temperature, release water vapor and carbon dioxide and other non-combustible gases, dilute the oxygen concentration on the surface of the combustion object, and reduce the temperature of the combustion area, so as to play a role in flame retardation.In addition, the magnesium oxide produced by decomposition covers the surface of the material to form a protective layer, and further prevents the combustion.

The utility model discloses an integrated large-span assembly type exquisite steel curtain wall structure, concretely relates to the exquisite steel curtain wall structure technical field, including framework component, fixed component, curtain wall component and second connecting component, the side of framework component is equipped with fixed component, and the side away from fixed component of framework component places curtain wall component, and the top of curtain wall component is equipped with second connecting component, and it can carry out real -time detection to the prestress that second fixed bolt exerts to second locating block surface through placing resistance voltage -transforming piece below second connecting component to the value of detection is passed to control panel, and control panel will analyze the prestress that second fixed bolt exerts to second locating block surface, when the prestress is less than certain critical value, and control panel will be in time to the feedback of construction personnel, and lets construction personnel to carry out the rush repair to it.

The present application relates to the technical field of paint, and especially relates to a weather-resistant one-coat paint and a preparation method thereof. The paint comprises component A and component B; the mass ratio of the component A to the component B is (25-30):3; according to weight parts, the component A comprises the following raw materials: 20-30 parts of hydroxyl acrylic acid resin, 10-20 parts of organic solvent, 25-35 parts of pigment, 5-15 parts of flame retardant, 1-5 parts of modified graphene and 1-4 parts of additive; and the component B is a solution of aliphatic polyisocyanate. The paint has excellent bacteriostasis, flame retardation, weather resistance and corrosion resistance.

This invention provides a method for preparing anti-deformation, flame-retardant, and smoke-suppressing glued laminated timber. The method involves mixing γ-methacryloyloxypropyl, o-phenylenediamine, and deionized water in a mass ratio of 1:(2-4.5):(5-7), followed by further mixing with polyvinyl acetate emulsion in a mass ratio of (1-2):10 to obtain a flame-retardant polyvinyl acetate emulsion. Multiple dried solid wood veneers are immersed in a constant-temperature water bath at 30-40°C. After removal, they are placed in an impregnation tank, and a copolymer AA / AMPS aqueous solution with a mass concentration of 40-45% and a degree of polymerization of 40-60 is injected under negative pressure to completely submerge the solid wood veneers. Pressure is then applied and maintained for 3-5 hours. After removal, cleaning, and drying at 70-80°C, the treated veneer surfaces are coated with the flame-retardant polyvinyl acetate emulsion and assembled. Cold pressing and hot pressing are then performed to obtain glued laminated timber with good anti-deformation, flame-retardant, and smoke-suppressing properties.

The application discloses a kind of high-strength waterproof board and preparation method thereof, it is related to plate technical field.The preparation method of the application includes the following steps: sequentially stack 1 steel plate, 2 base plates, 1 fingerprint-resistant polymer film on 1 fingerprint-resistant polymer film, then heat pressing solidification, after cooling, plate is taken out, and high-strength waterproof board is obtained;Wherein, base plate is prepared from modified kraft paper and modified color paper.The water resistance, fire resistance and bonding strength of the plate are effectively improved by modifying kraft paper with modified phenolic resin, hydrophilic silicon dioxide and other components;The bonding strength, water resistance and fire resistance of the plate are further improved by modifying color paper with melamine, vanillin, flame retardant DOPO, 3,4-dihydroxybenzaldehyde and other components.Therefore, the application has a more extensive application prospect.

This invention provides a forest flame-retardant suspension, its preparation method, and its application, comprising the following raw materials by weight percentage: 7-16% flame retardant, 0.7-1.6% char-forming thickener, 1.5-6% film-forming anchoring agent, 0.8-1.4% performance enhancer, 0.1-0.3% chelating dispersant, and the balance being water; wherein the flame retardant is type II ammonium polyphosphate with a degree of polymerization >1000, the char-forming thickener is sodium alginate and xanthan gum, and the film-forming anchoring agent is VAE emulsion. This invention utilizes the hydrophobicity of APPII to solve the problem of easy erosion by dew or rainwater. At the same time, it utilizes the polyphosphoric acid and ammonia produced by the thermal decomposition of APPII. The polyphosphoric acid catalyzes the formation of char from sodium alginate and vegetation cellulose, forming a dense protective layer. This protective layer isolates the transfer of heat and oxygen, cutting off the combustion chain at the source and achieving high flame retardant efficiency. The ammonia can dilute the oxygen concentration in the flame area, playing a gas-phase flame retardant role. The ammonia can also be absorbed or degraded by plants as nitrogen fertilizer, realizing the synergy between forest fire prevention and ecological restoration.