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1858results about How to "Improve brittleness" patented technology

Process for the manufacturing of an improved core for decorative laminates and a decorative laminate obtained by the process

A process for the manufacturing of a core forming a carrying structure for decorative laminates. The core comprises particles of cured, and optionally foamed, rigid, polyurethane, polyisocyanurate and / or phenolic resin. The particles are bonded to each other in a pressing procedure with a bonding agent comprising an adhesive such as a polymerizing monomer.i) The particles are achieved by grinding cured, and optionally foamed, rigid, polyurethane, polyisocyanurate and / or phenolic resin so that it passes through a 2 mm screen, preferably a 1 mm screen,ii) 100 parts per weight of particles is mixed with 1-100 parts per weight of fiber, the fiber additive having an average length in the range 1-15 mm.iii) The particle-fiber mixture is allowed to absorb a selected amount of water, the amount of water being in the range 1-15% by weight, The water is either added at any stage before the adding of bonding agent, and / or being used as a solvent in the bonding agent, and that,iv) 85 parts per weight of the particle mixture is mixed with 2-15 parts per weight of a bonding agent, the bonding agent selected from the group consisting of,a) A mixture of polyols, such as polyester or polyether, crude methylene diphenyl diisocyanate and possibly a small amount of blowing agent in a ratio forming a polymeric resin with a density in the range 600-1400 kg / m3.b) A formaldehyde based resin such as phenol-formaldehyde resin, urea-formaldehyde resin, melamine-urea-formaldehyde resin, melamine-urea-phenol-formaldehyde resin or phenol-resorcinol-formaldehyde resin, orc) Polyvinyl acetate resin.v)The mixture is applied between the belts of the continuos belt press or the press plates of a static press, optionally with at least one intermediate carrier web, the belts or press plates allowing a mainly uniform and specified material thickness to form. A slightly porous and preconditioned core with a selected water content in the range 0.8-12% is hereby achieved. The invention also relates to a decorative laminate achieved through the process.
Owner:PERGO

Low temperature curing high temperature resistant inorganic / organic hybridization epoxy adhesive and preparation thereof

InactiveCN101440268AImprove brittlenessImprove high temperature heat aging resistanceInorganic adhesivesEpoxy resin adhesivesCouplingLow temperature curing
The invention discloses a low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive and a preparation method thereof, which relate to an inorganic/organic hybrid epoxy adhesive and a preparation method thereof. The invention solves the problems that inorganic/organic hybrid epoxy adhesive prepared by the prior art has poor high-temperature thermal aging resistance and needs high curing temperature. The low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive is prepared by an epoxy resin, an epoxy resin low-temperature curing agent, a coupling agent, an inorganic active hybrid material and a dispersant. The preparation method comprises the following steps: the epoxy resin, the epoxy resin low-temperature curing agent and the coupling agent are mixed and stirred evenly, and then the inorganic active hybrid material and the dispersant are added into the mixture to be stirred evenly to obtain the low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive. The low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive has high high-temperature bonding strength, good high-temperature thermal aging performance and low curing temperature. The low-temperature curing high temperature-resistant inorganic/organic hybrid epoxy adhesive has the advantages of simple production technology, convenient operation and broad application.
Owner:INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI

Balloon catheter comprising pressure sensitive microparticles

The invention provides a solution to the above mentioned problem in that it provides a catheter balloon comprising a flexible coating on its outer surface wherein a plurality of microparticles are contained wherein said coating comprises a material selected from the group consisting of poly(N-vinyl-pirrolidone, poly(N-vinyl-pirrolidone-co-butylacrylate), poly(-vinyl pyridine), polyacrylamides, e.g. poly(N-isopropylacrylamide), poly(amido-amines), poly(ethylene imine), poly(ethylene oxide-block-propylene oxide), poly(ethylene oxide-block-propylene oxide-block-ethylene oxide), poly(styrene-block-isobutylene-block-styrene), poly(hydroxystyrene-block-isobutylene-block-hydroxystyrene), polydialkylsiloxanes, polysaccharides, polyacrylates and polyalkylmethacrylates, e.g. polymethylmethacrylate and poly(2-hydroxyethylmethacrylate) and wherein said microparticles comprise a material selected from the group consisting of polyesters, e.g. poly(lactic acid), poly(lactic-co-glycol acid), poly(glycolic acid), poly(3-hydroxybutyrate), poly(3-hydroxyvalerate), poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and polycaprolactone, polyamides, polysaccharides, polyurethanes, polyalkylmethacrylates and polyacrylates, e.g. polymethylmethacrylate and poly(2-hydroxyethylmethacrylate) and wherein the microparticles comprise a pharmaceutically active compound.
Owner:ENCAPSON

Silicon dioxide gel micro-encapsulated phase change energy storage material and preparation thereof

The invention discloses a silicon dioxide gel microencapsulated phase change energy storage material and a preparation method thereof. The preparation method is characterized by comprising the following steps: melting a phase change energy storage material in ethanol water solution at a temperature of between 30 and 90 DEG C, emulsifying under high-speed stirring, adding alkaline solution to ensure that the pH value of a reaction system is between 8 and 12, dropwise adding organic silicon oxide which accounts for 5 to 30 percent of the weight of the phase change energy storage material at a speed of between 1.5 and 8ml/m, reacting for 2 to 4 hours, and cooling, filtering and drying to obtain a micro-capsule which takes silicon dioxide gel produced by the organic silicon oxide under alkaline condition as a capsule wall and the emulsified phase change energy storage material as a capsule core, wherein the weight ratio of the phase change energy storage material to the organic silicon oxide is 2.3-19: 1. The obtained product has the average particle size not obviously increased, good free mobility of particles and compact and even capsule wall, and can be applied in the fields of energy utilization, heat exchange and temperature control.
Owner:UNIV OF SCI & TECH OF CHINA

Long-acting water-soluble and environmentally-friendly steel structural protective coating

The invention provides a long-acting water-soluble and environmentally-friendly steel structural protective coating. The long-acting water-soluble and environmentally-friendly steel structural protective coating is characterized in that a water-soluble inorganic zinc silicate coating is used as a primer of the protective coating; a water-soluble silicon-acrylic coating is used as an intermediate coating; a water-soluble fluorocarbon coating serves as a top coating; the water-soluble inorganic zinc silicate coating comprises the raw materials of high-modulus potassium silicate inorganic nanometer resin and synthesized organic polymer emulsion, wherein the high-modulus potassium silicate inorganic nanometer resin has the modulus of 5.3 to 6.2, and the particle diameter is 5 to 20nm; the synthesized organic polymer emulsion is composed of one or a plurality of water-soluble styrene-acrylic emulsion, water-soluble pure acrylic emulsion, water-soluble silicone acrylic emulsion, water-soluble fluorocarbon emulsion and water-soluble fluoro-silicon emulsion; and the water-soluble silicon-acrylic coating comprises the raw material of a silicon-acrylic matrix, wherein the silicon-acrylic matrix is one of a mixture of silicone acrylic emulsion and pure acrylic emulsion, the mixture of silicone acrylic emulsion and styrene-acrylic emulsion, and silicone acrylic emulsion. By adopting the long-acting water-soluble and environmentally-friendly steel structural protective coating, the corrosion resistance and weather resistance of the protective coating are obviously improved; the corrosion resisting effect can last for 20 years; and the weather resistance lasts for more than 20 years.
Owner:WUDA JUCHENG STRUCTURE CO LTD

Online self-sharpening metallic bond and super-hard abrasive precision grinding pellet and preparation method thereof

The invention provides an online self-sharpening metallic bond and super-hard abrasive precision grinding pellet and a preparation method thereof and belongs to the technical field of precision grinding pellets. Raw materials of the precision grinding pellet comprise a super-hard abrasive and a metallic bond, wherein the super-hard abrasive is diamond micro-powder; the diamond concentration falls within a range of 75-100 %; and the metallic bond uses a multicomponent alloy bond whose main components are copper powder, tin powder, aluminum powder, copper-clad ball shaped graphite powder, silicon dioxide and ferroferric oxide powder. The preparation method comprises the following steps: uniformly mixing and stirring the diamond micro-powder as well as the copper powder, the tin powder and the aluminum powder; adding polyvinyl alcohol to a mixture and mixing the polyvinyl alcohol and the mixture; adding the silicon dioxide, the copper-clad ball shaped graphite powder and the ferroferric oxide powder to an obtained mixture and mixing these materials and the obtained mixture; filling the mixture into a graphite mold; maintaining the pressure of the graphite mold for 5-10 minutes after pressurizing the graphite mold to 100-250 MPa; and carrying out hot pressing sintering on the graphite mold in a sintering furnace, wherein the sintering atmosphere is ammonia decomposition gas. Through the adoption of the online self-sharpening metallic bond and super-hard abrasive precision grinding pellet provided by the invention, online automatic sharpening can be achieved without blockage and offline repairing.
Owner:BEIJING UNIV OF TECH

Aqueous polyurethane micro-encapsulated phase change energy storage material and preparation thereof

The invention discloses a metal ion crosslinked aqueous polyurethane microencapsulated phase change energy storage material and a preparation method thereof. The preparation method is characterized by comprising the following steps: melting a phase change energy storage material in deionized water at a temperature of between 30 and 90 DEG C, adding a nonionic surfactant which accounts for 0.5 to 10 percent of the weight of the phase change energy storage material, emulsifying under high-speed stirring, then adding aqueous polyurethane with the polyurethane content which accounts for 0.5 to 20 percent of the phase change energy storage material and metal salt water solution with the metal ion weight which accounts for 0.1 to 10 percent of the polyurethane in the aqueous polyurethane, reacting for 0.5 to 4 hours, and cooling, filtering and drying to obtain a phase change energy storage material micro-capsule which takes the phase change energy storage material as a capsule core and metal ion crosslinked aqueous polyurethane as a capsule wall, wherein the weight ratio of the phase change energy storage material to the aqueous polyurethane is 0.5-20: 1. The product has the average particle size not obviously increased, good free mobility of particles and compact and even capsule wall.
Owner:UNIV OF SCI & TECH OF CHINA

A kind of preparation method of dual-phase hot forming steel

The invention provides a preparation method for double-phase forming steel, which belongs to the technical field of high-intensity steel for automobiles. The steel comprises the following ingredients by mass percent: 0.1 to 0.5 percent of C, 0.3 to 2.5 percent of Si, 1.0 to 3.0 percent of Mn, 1.0 to 3.0 percent of Al, at most 0.02 percent of P, at most 0.01 percent of S, at most 0.01 percent of Nand the balance iron and unavoidable impurities. A production process comprises the following steps of: smelting, hot rolling and hot forming process simulation after the hot rolling. The controlled process parameters are as follows: hot rolling plate blanks are heated to 1200 to 1250 DEG C, the heat insulation is carried out for 0.5 to 1 hour, the final rolling temperature is 800 to 900 DEG C, and the coiling temperature is 600 to 700 DEG C. The hot forming process comprises the following steps of: carrying out heat insulation for 5min at the heating temperature being 750 to 850 DEG C and cooling the materials to the room temperature at the speed greater than 40 DEG C/s. The preparation method adopts the Al micro alloying treatment. Compared with the traditional thermal forming manganeseboron steel, the double-phase forming steel has the advantages that: 1, the hot forming heating temperature is low, and the surface oxidation is reduced; and 2, tissues after the hot forming are ferrite and martensite double-phase tissues.
Owner:UNIV OF SCI & TECH BEIJING
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