35results about How to "Reduced linear shrinkage" patented technology

The invention discloses an organosilicon material. The organosilicon material comprises: a component A comprising, by weight, 80-200 parts of organopolysiloxane, 20-60 parts of a reinforcing filler, 0-20 parts of silicon resin, 50-80 parts of a heat conduction filler, 2-20 parts of a structurized control agent, and 0.05-0.8 parts of a reaction catalyst; and a component B comprising, by weight, 80-200 parts of organopolysiloxane, 0.5-10 parts of organic hydrogen-containing polysiloxane, 20-60 parts of the reinforcing filler, 0-20 parts of silicon resin, 50-80 parts of the heat conduction filler, 2-20 parts of the structurized control agent, and 0.05-0.4 parts of a reaction inhibitor, wherein a weight ratio of the component A to the component B is 1:1. The invention also discloses a preparation method of the organosilicon material, and a method for applying the organosilicon material in 3D printing. The organosilicon material has the advantages of superior performances, safety and non-toxicity; the preparation method of the organosilicon material is simple and is easy to carry out; and application of the organosilicon material in 3D printing is maneuverable.

The invention relates to an inorganic vitrified micro bubble external heat-insulating system for an outer wall, which comprises an interface layer, an inorganic vitrified micro bubble heat-insulating layer, a crack-resisting mortar covering surface layer and a finishing coat. Inorganic heat-insulating mortar for preparing the inorganic vitrified micro bubble heat-insulating layer is formed by vitrified micro bubbles and powder according to the weight ratio of (0.6-0.8):1; the powder contains 200-300 parts of cement, 200-250 parts of fly ash, 8-10 parts of emulsion powder, 0.8-1.6 parts of polypropylene fiber, 60-100 parts of calcium hydroxide, 2-6 parts of wood fiber, 2-4 parts of water repellent, 6-8 parts of HPMC (Hydroxy-Propyl Methyl Cellulose), 2-5 parts of modified polyethylene glycol oxide and 0.4-0.6 part of bentonite. Various performance indexes of the heat-insulating mortar disclosed by the invention, such as material density, heat conductivity coefficient, heat storage coefficient, the shrinking percentage, the strength and the like, are superior to those of general vitrified micro bubble heat-insulating mortar; and the inorganic vitrified micro bubble external heat-insulating system has greater advantages in the heat storage coefficient, compressive strength and the like and can be used for well solving the problems of heat insulation, weather resistance and durability of the heat-insulating system.

The present invention provides a method for preparing a recyclable multifunctional dynamic covalent polymer aerogel material, which comprises the following steps: S1, mixing at least one difunctional reactive monomer A and at least one difunctional The reaction monomer B is dissolved in the solvent, and the prepolymer is obtained by stirring reaction; S2, adding a compound C containing at least three functional groups to the prepolymer obtained in step S1 as a crosslinking agent to obtain a dynamic covalent polymer wet coagulation glue; S3, subjecting the obtained dynamic covalent polymer wet gel to aging treatment and solvent exchange treatment, and then drying to obtain a recyclable multifunctional dynamic covalent polymer aerogel material; the recyclable multifunctional dynamic covalent polymer aerogel material; The dynamic covalent bond in the covalent polymer aerogel material is at least one of imine bond, disulfide bond and boron-oxygen bond. The method of the invention constructs a dynamic polymer gel network through dynamic covalent bonds, and realizes the recyclability of aerogel materials.

The invention discloses a method for preparing a near-net size of a porous silicon nitride / silicon oxynitride ceramic composite material, which relates to a method for preparing a near-net size of the composite material. The invention solves the problem that the shrinkage rate of the Si3N4 ceramic green body is relatively large during the sintering process. The method is as follows: preparing a porous silicon nitride green body; pre-sintering the green body; impregnating, gelling, drying; and sintering to obtain the porous silicon nitride / silicon oxynitride ceramic composite material. The porous silicon nitride / silicon oxynitride ceramic composite material prepared by the method of the invention can reduce the shrinkage rate of the green body during sintering while meeting the mechanical property requirements. The method of the invention has the advantages of simple process, low cost and good repeatability.

The invention discloses a two-component addition type room temperature vulcanized silicone rubber for manufacturing a handprint mold and a footprint mold, which comprises a basic component and a catalyst component, wherein the volume ratio of the basic component to the catalyst component is 1-3:1; the basic component comprises the following raw materials: 40-80% of vinyl silicone oil, 0.5-10% of methyl hydrogen silicone fluid of cross-linking agent, 0.01-0.5% of inhibitor, 3-15% of releasing agent, 1-10% of plasticizer and 10-60% packing; and the catalyst component comprises the following rawmaterials: 40-80% of vinyl silicone oil, 3-15% of methyl vinyl siloxane coordination platinum complex, 3-15% of releasing agent, 1-10% of plasticizer and 10-60% of packing. The invention has convenience and safety.

A polycarbosilane non-melting pretreatment and its cracking transformation method for three-dimensional ceramics relate to the preparation of ceramic materials. Synthesize the three-dimensional silicon carbide polymer precursor first, prepare SiC(Al,rGO)p ceramic particles by pyrolysis at high temperature under the protection of an inert atmosphere, mix with the precursor powder by ball milling, then dry, press into tablets and sinter at high temperature again to obtain 3D‑SiC (Al,rGO) ceramics, and finally modify the surface morphology of ceramics. The three-dimensional ceramic material contains four elements: Si, C, O, and Al, and Al is evenly distributed in SiO in an atomic state. x C y In the amorphous phase, β-SiC nanocrystals are embedded in SiO composited with rGO x C y / C free In the amorphous phase, there is SiO 2 Microcrystalline. Expand the crosslinking degree and molecular weight of the precursor to form a three-dimensional network structure, reduce the evaporation of small molecule gas during cracking, improve the fracture toughness and high temperature stability of ceramics, and meet the harsh environment applications such as high temperature.

The invention discloses a novel inorganic lightweight mortar and a reinforcing agent product. The novel inorganic lightweight mortar comprises the following components by mass: 75 to 85 parts of mineral fiber, 3.5 to 5.5 parts of magnesium carbonate (calcium carbonate), 2 to 4 parts of cellulose, 6 to 7.5 parts of water-proofing agent, 0.03 to 0.15 part of dispersing agent, and 4.5 to 6.5 parts of fiber. The novel inorganic lightweight mortar and the reinforcing agent product have the advantages that the operability of the inorganic lightweight mortar and the product can be obviously improved, the construction time is saved, the construction efficiency is improved, the construction cost is reduced, the tensile strength, the adhering strength and the softening coefficient of the inorganic lightweight mortar and the product are greatly improved; the linear shrinkage is reduced, the phenomena of hollowing, cracking and separating can be prevented, and the safety of the heat insulation material is improved; the inorganic lightweight mortar and the product with the reinforcing agent adopted are high in fireproofing grade, light in volume weight, low in coefficient of thermal conductivity, and excellent in heat insulation performance; and the reinforcing agent has no pollution in the production and application, and is environment-friendly and beneficial for recycling waste, so as to meet the requirement on energy conservation of a building.

The invention relates to a cross linker of insulating anti-crack mortar, comprising the components with mass fraction as follows: 76-82% of acrylic emulsion, 0.4-0.7% of dispersant, 0.2-0.5% of wetting agent, 1.5-2.4% of thickener, 0.2-0.4% of fungicide and the balance of deionized water. The cross linker of the invention can improve the flexibility and waterproofness of the cement mortar, enhancethe alkaliproof breaking strength retention of fiberglass gridding cloth and prevent the cement mortar alkali from eroding the fiberglass gridding cloth by covering the fiberglass gridding cloth so as to improve the service life pf the gridding cloth and ensuring more compact connection between the gridding cloth and the anti-crack mortar; a flexible polymer film layer and a hardening cement bodyinterpenetrate each other and form a stable and flexible protective layer by firm bonding, thus solving the defect of overlarge elastic modulus and linear expansibility between an insulating layer and the protective layer and finish of the anti-crack mortar, achieving flexible release of stress and effectively reducing the linear shrinkage of the system.

The invention discloses a polyurethane board and a preparation method thereof. The manufacturing method comprises the following steps of uniformly mixing a component A, a component B and compound filler to prepare a foaming material, injecting the foaming material into a die for compression molding, and finally demoulding to form a polyurethane board product, wherein the component A comprises a polyether polyol auxiliary a and a polyester polyol auxiliary b; the component B is isocyanate; the filler is prepared from an inorganic powder material, a plant powder material and a fiber material. According to the manufacturing method, the polyurethane board product is manufactured by uniformly mixing the compound polyester polyol, the isocyanate and the compound filler, injecting the mixture into the die and carrying out heat-preservation pressing. The obtained product is high in mechanical performance strength, low in linear shrinkage rate during storage and use, is not easy to warp after long-term storage and high in production and secondary processing precision, does not easily absorb water and can be applied to the field having high requirement on size precision.

The invention discloses a method for preparing a high-conductivity and heat-resistant aluminum alloy wire, which comprises the following steps: S1. Place carbon fiber and basalt fiber on a yarn rack to divide the yarn, adjust the tension, perform dehydration treatment, and then pull and infiltrate through a constant temperature glue tank A thermosetting resin composition; S2. The carbon fiber and basalt fiber soaked in the thermosetting resin composition are cured and formed through a heating forming mold to obtain a composite fiber reinforced core; S3. Processing is made of an aluminum alloy rod with a diameter of 9.5mm, and then passed through an aluminum alloy Wire drawing machine draws aluminum alloy single wires; S4. Twisting several aluminum alloy single wires on the outer surface of the composite fiber reinforced core to form an aluminum alloy conductor layer to make a high-conductivity heat-resistant aluminum alloy wire product; The heat-resistant aluminum alloy wire has good heat resistance, and can still maintain stable performance when working at high temperature for a long time. It has a long service life and effectively reduces maintenance costs.

The invention relates to the technical field of building materials, in particular to high coal ash dosage I type inorganic building thermal mortar. The high coal ash dosage I type inorganic building thermal mortar is composed, by mass, of 45-55 parts of P.O 425 cement, 45-55 parts of secondary coal ash, 2.5-3.5 parts of sodium sulfate, 10-15 parts of ash calcium powder, 85-95 parts of glass bead, 0.2-0.4 part of hydroxypropyl methyl cellulose ether, 1-3 parts of VAE redispersible emulsion powder, 0.1-0.3 part of polypropylene fiber and 0.2-0.4 part of rosin air entraining admixture. The high coal ash dosage I type inorganic building thermal mortar has the advantages that the coal ash is used for replacing 45-55 percent of cement, the ash calcium powder and the sodium sulfate are used for exciting the activity of the coal ash, the mechanical property of the thermal mortar is improved, the proper cellulose ether and the redispersible emulsion powder are added to improve the working performance and the bonding performance of the mortar, the cracking resisting performance of the mortar is improved, the dry density and the heat conductivity coefficient of the mortar are lowered, and the heat preservation and insulation performance is improved.