45results about How to "Consider heat resistance" patented technology

The invention belongs to the precision casting technique and relates to a water-soluble ceramic core material and a preparation method thereof. The water-soluble ceramic core material comprises a high-temperature ceramic material, water-soluble inorganic salts, metallic oxides and at least one amorphous ceramic material. The preparation method comprises the following steps: raw material pretreatment, raw material weighing, mixing, mold core forming, degreasing, sintering and secondary sintering. According to the water-soluble ceramic core material and the preparation method, the properties of surface quality, dimensional precision, foaming level, mechanical strength, heat resistance, water solubility, environment friendliness and the like of the mold core can be considered, and scientific research and production requirements of aluminum alloy are met.

Provided is a thermosetting resin compound containing carboxyl modified polyurethane resin, characterized by comprising the carboxyl modified polyurethane resin (A) which is at least one compound selected from a group consisting of an epoxy group contained compound, an isocyanate contained compound, and a closed isocyanate group contained compound, and a thermofixation assistant (C). The carboxyl modified polyurethane resin (A) is formed by making the polyatomic compound (a) and at least one anhydride group compound (b) selected from ring type multielement anhydride and aromatic aromatic anhydride produce reaction to generate carboxyl ester resin (c). Then the carboxyl ester resin (c) is made to react with an epoxy compound (d) in I molecules having at least two epoxy groups to produce side chain hydroxyl modified ester resion (e). Then the anhydride group compound (b) is made to react with the side chain hydroxyl modified ester resion (e) to generate the carboxyl modified polyurethane resin (A).

The invention provides high-temperature-resistant light-cured resin and a preparation method thereof. The light-cured resin comprises the following components in percentage by mass: 40%-70% of epoxy resin, 5%-20% of acrylic resin, 10%-20% of an active diluent, 3%-6% of a cationic photoinitiator, 1%-3% of a free-radical photoinitiator, 5%-20% of a flexibilizer and 0.1%-3% of an inorganic filler. The high-temperature-resistant light-cured resin is high in curing reaction rate and has both toughness and strength.

The invention discloses a fireproof heat insulation coating and a preparation method thereof. The fireproof heat insulation coating comprises: components A (weight percentage): 15-50% of organic silicon modified epoxy resin, 0-5% of a reactive diluent, 0-15% of a catalyst, 0-5% of a char forming agent, 0-5% of a foaming agent, 5-25% of surface-modified hollow glass microspheres, 1-15% of a flame retardant, 1-10% of refractory fibers, 1-5% of an auxiliary agent and 10-30% of an organic solvent; components B (weight percentage): 40-70% of a curing agent, 0-30% of titanium dioxide, 1-5% of an auxiliary agent, 1-10% of refractory fibers and 0-30% of an organic solvent, wherein the weight ratio of the components A to the components B is (1-6) to 1. The fireproof heat insulation coating has a fireproof function, a heat-insulating function and heat resistance, meanwhile has lower density, has better adhesion power with various base materials, has good matching property with various primer andfinish paints, has interlayer adhesion power, and is resistant to various types of solvent oils and organic solvents.

The invention discloses a preparation method of a food-grade full-degradable high-temperature-resistant polylactic acid composite material, and belongs to the field of biodegradable high polymer materials. The composite material comprises, by weight, 100 parts of poly-l-lactic acid (PLLA), 1-10 parts of poly-d-lactic acid (PDLA) and 0.5-1 part of functional additives. Compared with traditional petroleum-based high polymer materials, the composite material has the advantages of being easy to degrade and renewable; compared with common polylactic acid, the composite material has excellent heat resistance. Thus, the polylactic acid composite material can be applied to high-temperature-resistant food packages.

The invention relates to the technical field of copper-clad plates, in particular to a novel aramid-paper-based copper-clad plate and a preparation method thereof. The novel aramid-paper-based copper-clad plate comprises a substrate and copper foil and is characterized in that the substrate is formed by stacking a plurality of prepregs, and the copper foil is stacked to at least one surface of thesubstrate; each prepreg comprises modified para-position aramid paper and resin composite layers stacked to at least one surface of the aramid paper; the copper foil is adhered to the surface of theresin composite layers through glue. The aramid-paper-based copper-clad plate is good in stripping strength, small in density, excellent in dielectric property and thermal expansion coefficient, and the good thermal conductivity of the aramid-paper-based copper-clad plate can greatly expand the application range of the copper-clap plate.

The invention discloses a flame-retardant bismaleimide resin and a preparation method thereof. The flame-retardant bismaleimide resin is prepared by the following steps: stirring 100 weight parts of bismaleimide, 0-80 weight parts of diallyl phenyl compounds and10-50 weight parts of a halogen-free non-phosphorus silicon-containing flame retardant under the temperature condition of 120-150DEG C to form a transparent liquid. The halogen-free non-phosphorus silicon-containing flame retardant is poly-maleimide hyperbranched silicon resin with the branching degree of 0.5-0.6 and the molecular weight of 2500-3400. The flame-retardant bismaleimide resin not only has excellent flame retardance performance, but also the mechanical performance can be greatly improved, in addition, the flame-retardant bismaleimide resin also maintains the excellent heat resistance, and can be used as a high-performance resin matrix, an adhesive, insulating paint and the like, and has wide application prospects in the fields of aerospace, electronic information, electrical insulation and the like.

The invention relates to a manufacturing process for centrifugal casting of multi-element eutectic high-alloy rolls, and belongs to the technical field of metallurgical rolls. The technical scheme includes that eutectic compositions are selected as materials of a roll working layer, and besides five elements of C, Mn, Si, P and S commonly existing in steel, not less then five alloying elements of Cr, W, Mo, V, Nb, Ti, Al, Cu, B and Mg need to be added into the roll materials to form a multi-element alloying state; carbon content of the roll materials is controlled to be 1.3%-2.8% in mass percent. The manufacturing process is small in solidification temperature range of the eutectic compositions, and particularly suitable for obtaining high-quality castings under the circumstance that feeding conditions are insufficient; the castings are crystallized simultaneously, and optimal in composition uniformity, concentrated cavity shrinkage is formed, metallic yield by casting moulding is high; the metal is solidified at the same time, and casting stress in the process of solidification is minimum; the eutectic compositions in alloy are lowest in melting point, and smelting cost is also low; liquid of the eutectic compositions is best in fluidity; castability is improved, and abrasion resistance and heat resistance are taken into consideration.

The invention discloses a high and low temperature resistance and engine diesel oil resistance ultra-low pressure variation rubber material and a preparation method thereof. The high and low temperature resistance and engine diesel oil resistance ultra-low pressure variation rubber material is prepared from the following components in parts by weight: 100 parts of 26 type and 40 type blending nitrile rubber, 60-100 parts of a reinforcing agent, 5-10 parts of a softening plasticizer, 4-6 parts of an antioxidant, 2-5 parts of a process auxiliary, 3-8 parts of an active agent, 2-4 parts of a vulcanizing agent and 0.5-3 parts of an auxiliary crosslinking agent. The preparation method of the rubber material comprises three steps of mastication, mixing and vulcanizing. According to the high and low temperature resistance and engine diesel oil resistance ultra-low pressure variation rubber material prepared by the technical scheme, the use temperature range of nitrile rubber is widened, permanent compressing deformation of the nitrile rubber in hot oil is greatly lowered, the service life of the nitrile rubber is prolonged, the application range of the nitrile rubber is widened, the cost is relatively low, and the rubber material can partly replace more expensive rubber materials such as chlorosulfonated polyethylene, ethylene propylene diene monomer, carboxylated nitrile and the like and has very large economic value.

The invention discloses a high-temperature-resistant composite antibacterial agent and a preparation method thereof, and belongs to the technical field of bactericides. The composite antibacterial agent comprises a guanidine salt antibacterial agent and inorganic additives, wherein the inorganic additives are selected from one or more of boric acid, boric oxide, zinc oxide, titanium dioxide, phosphoric acid, zeolite powder, silica gel powder, glass powder, talcum powder and hydroxyapatite. The preparation method comprises the following steps: adding a small number of volatile solvents into the guanidine salt antibacterial agent and the inorganic additives, mixing to be pasty, and uniformly grinding to obtain the high-temperature-resistant composite antibacterial agent; or dissolving the guanidine salt antibacterial agent and the inorganic additives into the solvents, and steaming and removing the solvents to obtain the high-temperature-resistant composite antibacterial agent. The composite antibacterial agent can integrate the immediate action, the broad spectrum and the continuity of an organic system with the safety and the heat resistance of an inorganic system. Compared with an undoped antibacterial agent, the high-temperature-resistant composite antibacterial agent has the advantage that the heat stability is obviously improved. Other accessory components can be added into the antibacterial agent according to specific application.

The invention relates to hardening agent resin prepreg rubber solution and heat dissipation rubber pieces and a manufacturing method thereof. The main structural components of the hardening agent are shown as the formula (I), and the addition of the hardening agent enables the heat dissipation rubber piece to possess both heat resistance and adhesiveness. Since the structure of the hardening agent has polarity, inorganic powder can be uniformly dispersed in the resin prepreg composition rubber solution, thus the heat dissipation rubber piece manufactured by being dipped in the resin prepreg constitutive rubber solution has better resin characteristics and heat conduction efficiency.

The invention discloses a lightning protection composite material surface film as well as a preparation method and an application thereof and relates to a lightning protection composite material surface film for aerospace as well as a preparation method and an application thereof. The invention aims to solve problems in the previous aerospace composite material manufacture lightning protection method that the electromagnetic shielding property is poor, the process is complicated or weight gain is large and the like. Carbon nanomaterials and micron silver flakes are taken as conductive materials, a novel epoxy resin modified method is provided, and the heat resistance and toughness of the epoxy resin are improved. The lightning protection composite material surface film disclosed by the invention is composed of epoxy resins, micron silver flakes, carbon nanomaterials, a toughening modifier, a heat-resistant modifier, a curing agent, a UV stabilizer and a carrier. The preparation methodof the lightning protection surface film comprises the following steps: uniformly blending the raw materials, and forming the film by adopting a resin hot melting method. The lightning protection composite material surface film disclosed by the invention is capable of improving the surface quality of composite material structural members, and has the lightning protection function.

The purpose of the present invention is to provide: a polycarbonate resin composition having excellent transparency and having a high biogenic substance content rate and high levels of heat resistance, humid heat resistance, and impact resistance in a well-balanced manner; a method for producing the same; and a molded object of the polycarbonate resin composition. The present invention pertains to: a polycarbonate resin composition comprising a polycarbonate resin (A) including a constitutional unit derived from a compound represented by formula (1), and an aromatic polycarbonate resin (B); amethod for producing the same; and a molded object of the resin composition.

The invention discloses a xenon lamp ultraviolet aging resistant flame-retardant silicone rubber material which is prepared from the following raw materials in parts by weight: 100 parts of linear polysiloxane, 120-150 parts of a functional reinforcing agent, 5-8 parts of a structure control agent, 1-5 parts of a cross-linking agent, 2-5 parts of an active heat-resistant additive, 1-3 parts of a functional aid and 1-3 parts of a vulcanizing agent. Meanwhile, the invention also provides a preparation method of the silicone rubber material. The silicone rubber material provided by the invention has the advantages that the heat resistance, the flame retardant property and the low-temperature brittleness are simultaneously considered, the xenon lamp ultraviolet aging resistance is good, the service life of the silicone rubber material is prolonged, and the application range of the silicone rubber material is further expanded.