57results about How to "Excellent compression resistance" patented technology

The invention discloses a preparation method of a biomimetic cartilage doped ordered magnetic nano-short fibers spliced double-layer hydrogel. According to the invention, nano-fibers containing magnetic particles are prepared by an electrospinning technology, and the nano-fibers are cut by a high-speed shear type homogenizer to obtain short fibers; the short fibers are mixed with a gel precursor and a cross-linking agent, and under the action of an external magnetic field, the magnetic short fibers are arranged orderly; by UV-irradiation, the gel precursor is cross-linked to obtain hydrogel doped with the ordered magnetic short fibers; two pieces of hydrogel are spliced in the way that the short fibers are perpendicular to each other, and spliced hydrogel is obtained relying on magnetic nanoparticles in the two pieces of hydrogel attracting each other; the spliced hydrogel is immersed in a sodium alginate solution, and a calcium chloride solution is added for gelatinization of the sodium alginate solution so as to obtain spiced double-layer hydrogel. The spiced double-layer hydrogel has a similar structure to cartilage tissue, good mechanical properties and magnetic properties, canpromote cell directed proliferation and differentiation, and is used for cartilage tissue repair.

The invention discloses a high-temperature-resistant and fire-resistant exterior wall panel, which comprises a base layer, a fire-resistant insulation layer, a plastering mortar layer, a waterproof layer, a decorative coating and a wear-resistant layer arranged sequentially from the inside to the outside; Parts include: 27-30 parts of hydroquinone, 11-14 parts of hexachlorocyclotriphosphazene, 18-22 parts of polyoxypropylene glycol, 65-70 parts of isophorone diisocyanate, trimethylpentanediol 50-60 parts, 3-4 parts of glucose, 0.3-0.6 parts of organic bismuth catalyst DY-20, 25-35 parts of foaming agent, 9-12 parts of foaming aid, 19-22 parts of palygorskite, 13 parts of dolomite ~16 parts, diatomite 6-9 parts, glass fiber 5-8 parts, straw silk 12-15 parts, magnesium hydroxide 16-19 parts, anti-aging agent 2-3 parts. The high-temperature-resistant fire-proof exterior wall panel proposed by the invention has excellent high-temperature resistance and fire-proof performance, excellent water resistance, high hardness and good compression resistance.

In a threaded joint for steel pipes comprising a pin (1) and a box (2), each having a threaded portion (11 or 21), a sealing surface (13 or 23), and a shoulder surface (14, 15 or 24, 25), the sealing surface (13) of the pin (1) is formed by a tapered surface, and the sealing surface (23) of the box (2) is formed by a first curved surface portion with a large radius of curvature in the range of 15- 120 mm, a tapered surface portion, and a second curved surface portion with a large radius of curvature again in the range of 15 - 120 mm.

The invention discloses an exterior wall panel with excellent sound-absorbing and fire-proof performance, which comprises a base layer, a sound-absorbing fireproof layer, a plastering mortar layer, a waterproof layer, a decorative coating and a wear-resistant layer; the preparation method of the sound-absorbing fireproof layer is as follows: hydroquinone, Potassium hydroxide and toluene are mixed evenly, and then a toluene solution containing hexachlorocyclotriphosphazene is added dropwise, heated up, kept warm, washed with an alkali solution to obtain an organic phase, then the organic phase is distilled under reduced pressure, dried in vacuum, and recrystallized to obtain material a ; Mix material a and polytetrahydrofuran ether glycol evenly, then add trimethyl-1,6-hexamethylene diisocyanate, fill with dry nitrogen for protection, heat up, keep warm, and cool down to obtain material b; Add trimethylpentanediol, glycerin, bismuth neodecanoate, foaming agent, foaming aid, expanded perlite, palygorskite, diatomaceous earth, glass fiber, flax fiber, zinc borate hydrate, anti-aging agent and Acetone is mixed evenly, coated on the surface of the base layer, then heated up, and kept warm to obtain a sound-absorbing and fire-proof layer.

The invention relates to a graphene-based organosilicon porous nanometer material and a preparation method thereof. The graphene-based organosilicon porous nanometer material is composed of a component A and a component B according to a weight ratio of (1-2): 1, wherein the component A comprises the following raw materials in parts by weight: 10 to 50 parts of methyl vinyl polysiloxane, 5 to 20 parts of methyl hydrogen-containing polysiloxane, 0.1 to 5 parts of a chain extender, 0.1 to 10 parts of a separant, 5 to 30 parts of graphene, 0.05 to 2 parts of a structured control agent, 0.05 to 2 parts of a silane coupling agent, 0.01 to 1 part of a silicone-based inhibitor and 0.5-5 parts of a foaming agent; and the component B comprises the following raw materials in parts by weight: 10 to 20parts of methyl vinyl polysiloxane, 10 to 30 parts of methyl vinyl MQ silicon resin, 0.1 to 10 parts of a separant, 5 to 30 parts of graphene, 0.05 to 2 parts of a structured control agent, 0.01 to 1part of a catalyst and 0.5-5 parts of an activator. The graphene-based organosilicon porous nanometer material is light in weight, viscoelastic, fine and uniform in cross section foam pores, firm inbonding a base material due to interaction of a graphene nanometer film and an organosilicon material base body, excellent in compression resistance, impact resistance and thermal stability, and is applicable to light-weight application scenes like sealed shock absorption, microwave absorption, electromagnetic shielding and heat dissipation protection.

The invention discloses a noise-reducing and fireproof external wall panel. The external wall panel comprises a base layer, a noise-reducing and fireproof layer, a flow guide plate layer, an abrasion-resistant layer and a decoration coating which are arranged sequentially from inside to outside; a preparation method of the noise-reducing and fireproof layer comprises steps as follows: a phosphonitrilic chloride trimer is heated, kept at the temperature, cooled to the room temperature and washed, and polydichlorophosphazene is obtained; polydichlorophosphazene is added to tetrahydrofuran, hydroquinone is dropwise added, then reflux heating, distillation, washing and vacuum drying are performed, and a material a is obtained; after the material a and poly-1,4-butylene adipate glycol are evenly mixed, 1,6-hexamethylene diisocyanate is added, dry nitrogen is introduced for protection, and a material b is obtained through heating, temperature keeping and cooling; diethylene glycol, pentaerythritol, bismuth laurate, a foaming agent, a blowing promoter, bentonite, palygorskite, expanded perlite, glass fibers, jute fibers, magnesium hydroxide, an anti-aging agent and acetone are evenly mixed, the surface of the base layer is coated with the mixture, and then the noise-reducing and fireproof layer is obtained through heating and temperature keeping.

The invention discloses compression-resistant polyurethane foam. The compression-resistant polyurethane foam comprises a component A and a component B, wherein the component A comprises polydihydric alcohol of which the molecular chain does not contain F, O and N elements, and expanded microspheres, a low-boiling-point foaming agent, a catalyst and a surfactant; the component B comprises diisocyanate, a chain extender, a cross-linking agent and polydihydric alcohol, wherein the diisocyanate is excessive; the component A and the component B are mixed and then coated on the surface of a high polymer material or metal material film, and the polyurethane foam is obtained after curing molding. The invention also discloses a preparation method of the compression-resistant polyurethane foam. The final polyurethane molecular blocks are arranged in order, and the polyurethane foam has a three-stage compression-damping structure at a microscopic level so that the polyurethane foam has good compression resistance, has long service time under a compression condition, and can better adapt to a service environment and protect devices.

The invention relates to a high-performance hydrogenated butadiene-acrylonitrile rubber compound and a preparation method thereof. The high-performance hydrogenated butadiene-acrylonitrile rubber compound comprises high-saturation hydrogenated butadiene-acrylonitrile rubber, carboxyl hydrogenated butadiene-acrylonitrile rubber and multifunctional epoxy resin. The hydrogenated butadiene-acrylonitrile rubber is cross-linked in the function of an organic peroxide, and at the same time, carboxyl hydrogenated butadiene-acrylonitrile rubber and multifunctional epoxy resin are self-crosslinked, so that a diversified polymer crosslinking system is formed and meets the requirement of features, such as oil resistance, heat resistance, hydrogen sulfide resistance, high hardness and good compression resistance, of rubber sealing products used in an oil field. Meanwhile, liquid multifunctional epoxy resin is taken as a rubber reactive temporary plasticizer, allows a rubber compound to be relativelylow in Mooney viscosity, and improves the compounding, molding and vulcanization processing property. During preparation, conventional mixing technology can be used, an open mill or an internal mixercan be used for mixing, and the rubber compound adapts to mould pressing or injection molding vulcanization process. Compared with a rubber compound in the prior art, the rubber compound is excellentin performance, simple in preparation method, low in cost, and suitable for industrial production.

The invention discloses a modified fluororubber sealing gasket material which is characterized by being prepared from the following raw materials in parts by weight: 65-70 parts of fluororubber, 3-4 parts of graphite, 10-12 parts of phenolic resin, 2-3 parts of silane coupling agent KH-550, 4-6 parts of dibutyl phthalate, 2-3 parts of polyisobutene, 2-5 parts of diethylene glycol benzoate, 2-3 parts of magnesium oxide, 2-3 parts of zinc oxide, 1-2 parts of anti-aging agent ODA, 1-2 parts of accelerant CZ, 1-2 parts of monobutyl tin oxide, 1-2 parts of sulfur, 30-35 parts of N550 carbon black, 10-12 parts of calcium carbonate powder, 15-18 parts of nano clay and 10-12 parts of modified attapulgite clay. Due to the added modified attapulgite clay, the process performance of the size is improved, and the toxic and side effects and environmental pollution are reduced by using an environment-friendly compounding agent. The modified fluororubber sealing gasket material has high sealing property, compression resistance, ageing resistance, oil resistance and friction resistance.

The invention discloses an external wall panel with excellent fireproof performance. The external wall panel comprises a base layer, a heat-insulation fireproof layer, a finishing mortar layer, a waterproof layer, a decorative coating and a wear-resistant layer which are arranged sequentially from inside to outside, wherein the heat-insulation fireproof layer is prepared from the raw materials in parts by weight: 27-30 parts of hydroquinone, 11-14 parts of hexachlorocyclotriphosphazene, 18-22 parts of poly (1,6-hexamethylene adipate) diol, 65-70 parts of diphenylmethane diisocyanate, 50-60 parts of ethylene glycol, 0.8-1.2 parts of pentaerythritol, 0.3-0.6 part of dibutyl tin dilaurate, 25-35 parts of foaming agent, 9-12 parts of foaming auxiliaries, 19-22 parts of expanded perlite, 13-16 parts of bentonite, 6-9 parts of diatomite, 5-8 parts of glass fibers, 12-15 parts of cotton fibers, 16-19 parts of magnesium hydroxide and 2-3 parts of anti-aging agent. According to the external wall panel, the high-temperature resistance and fireproof performance are excellent, the water resistance is excellent, the hardness is high, and the compression resistance is good.

The invention discloses a preparation method of high-temperature-resistant polyethylene fiber and rubber composite and belongs to the field of composite. A polyethylene fiber semi-dilute solution is prepared from ultra-high molecular weight polyethylene fiber and put in a plasma generating device for surface modification, a modified polyethylene fiber semi-dilute solution is prepared and mixed with silica sol prepared from ethyl silicate, absolute ethyl alcohol and the like, a polyethylene fiber and silica mixed solution is obtained, natural rubber is taken, zinc oxide and stearic acid are added, the mixture is cut by a cutter, the polyethylene fiber and silica mixed solution, an accelerator and the like are added, the mixture is mixed, dried and smashed, and the high-temperature-resistant polyethylene fiber and rubber composite is obtained. The characteristics of high rubber flexibility, high elasticity and higher fiber rigidity are used, characteristics of polyethylene fiber and rubber are effectively combined, the performance of the composite is superior to that of a conventional rubber product, and the composite is resistant to high temperature and has good stretching performance and compression resistance.

The invention discloses an elastic fireproof wallboard which comprises a base layer, a frame layer, an adhesive layer, a plastering mortar layer, an insulation layer, a latex layer, a decorative coating and an abrasion-resistant layer. The base layer is covered by the frame layer. The frame layer is composed of a plurality of workpieces which are arranged in parallel or in a staggered mode and form filling cavities. The filling cavities are filled with filler. The frame layer is covered by the adhesive layer. The adhesive layer is covered by the plastering mortar layer. The plastering mortar layer is covered by the insulation layer. The insulation layer is covered by the latex layer. The upper surface of the latex layer is coated with the decorative coating made of decorative paint. The upper surface of the decorative coating is coated with the abrasion-resistant layer made of transparent abrasion-resistant paint.

The invention relates to the field of functional magnetic seal composite materials, in particular to a magnetic rubber seal composite material with high pressure denaturation and a preparation methodof the magnetic rubber seal composite material. The magnetic rubber seal composite material is mainly characterized by forming by nitrile rubber, neoprene, magnetic powder and a reinforcement, vulcanization and protection system, mixing with an internal mixer and shaping and vulcanizing with a vulcanizing machine. The magnetic rubber seal composite material has the advantages of good dynamic sealing and static sealing and solvent resistance, high pressure denaturation, good thermal stability, magnetic stability and the like.

The invention discloses a fireproof building exterior wall panel, which comprises a base layer, a fireproof layer and a wear-resistant decorative layer arranged sequentially from inside to outside; wherein the raw materials of the fireproof layer include: 97-100 parts of modified phenolic resin, melamine 22-25 parts of formaldehyde resin, 9-12 parts of liquid nitrile rubber, 14-17 parts of polyphenylene ether ketone, 0.9-1.2 parts of silane coupling agent, 13-16 parts of jute fiber, 5-8 parts of potassium titanate fiber, 23-26 parts of white carbon black, 21-24 parts of montmorillonite, 15-18 parts of foaming agent, 3-6 parts of foaming aid, 24-26 parts of hydrated zinc borate, 2-3 parts of anti-aging agent. The preparation method of the modified phenolic resin is as follows: react hydroquinone with diphenyl chlorophosphate to obtain the first material; react the first material with lauryl aldehyde to obtain the second material; Ammonium molybdate is reacted to obtain modified phenolic resin.