42results about How to "Improve tracking resistance performance" patented technology

A flame-retardant resin composition comprises a base resin (e.g., a polyester-series resin), a flame retardant (A) comprising a salt of an amino group-containing triazine compound with a sulfuric acid and / or a sulfonic acid, a flame-retardant auxiliary (B). The flame-retardant auxiliary (B) includes an aromatic resin, acyclic urea-series compound or a derivative thereof [e.g., acetyleneurea, uric acid, a salt of melamine or a condensate thereof (e.g., melam, melem, and melon) with cyanuric acid], an amino group-containing triazine compound (e.g., melamine or a condensate thereof), and / or an inorganic metal-series compound (e.g., a metal salt of an oxygen acid having no sulfur atom, a metal oxide, a metal hydroxide, and a metal sulfide). The present invention provides a flame-retardant resin composition to which flame retardancy is imparted without using a halogen-series flame retardant and an organic phosphorus-series flame retardant.

The invention discloses a high-performance tracking-resistant silicone rubber and a preparation method thereof. The tracking-resistant silicone rubber is prepared from the following raw materials in parts by mass: 100 parts of methylvinyl silicone rubber, 20-45 parts of fumed silica, 4-15 parts of hydroxy silicone oil, 0.3-1 part of hydrogen-containing silicone oil, 0.5-5 parts of nitrogenous silane, 0.1-2 parts of platinum compound and 0.5-4 parts of hexane 2,5-dimethyl-2,5-di-tert-butyl peroxide. The preparation method comprises the following steps: uniformly compounding the methylvinyl silicone rubber, fumed silica, hydroxy silicone oil and hydrogen-containing silicone oil in a kneader at room temperature, and carrying out heat treatment to obtain the silicone rubber basic rubber; and uniformly compounding the basic rubber and the other components in an open mill, and carrying out sectional vulcanization. The silicone rubber has excellent tracking resistance and mechanical properties, and can be used in the field of high-voltage insulation. The method has the advantages of accessible raw materials and simple processing technique, and is convenient for large-scale production.

A flame-retardant resin composition comprises a base resin (e.g., a polyester-series resin), a flame retardant (A) comprising a salt of an amino group-containing triazine compound with a sulfuric acid and / or a sulfonic acid, a flame-retardant auxiliary (B). The flame-retardant auxiliary (B) includes an aromatic resin, acyclic urea-series compound or a derivative thereof [e.g., acetyleneurea, uric acid, a salt of melamine or a condensate thereof (e.g., melam, melem, and melon) with cyanuric acid], an amino group-containing triazine compound (e.g., melamine or a condensate thereof), and / or an inorganic metal-series compound (e.g., a metal salt of an oxygen acid having no sulfur atom, a metal oxide, a metal hydroxide, and a metal sulfide). The present invention provides a flame-retardant resin composition to which flame retardancy is imparted without using a halogen-series flame retardant and an organic phosphorus-series flame retardant.

The invention discloses a silicone rubber having high resistance to electric erosion and used for an insulator and a preparation method thereof. The silicone rubber comprises the following raw materials: methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, fumed silica, aluminum hydroxide, zinc borate, aluminum oxide, a silane coupling agent, a structure control agent, hydrogen-containing silicone oil, vinyl silicone oil, zinc oxide, stearic acid, stearate, triethanolamine, tetrafluoroethene powder, an ultraviolet ray absorber, color masterbatch and a vulcanizing agent. The invention also provides the preparation method for the silicone rubber having high resistance to electric erosion and used for the insulator. The silicone rubber provided by the invention has high flame resistance and high resistance to tracking and electric erosion while meeting standard requirements for mechanical properties, hydrophobicity and weatherability of silicone rubber used for insulators; and the silicone rubber can guarantee long-term normal working of a composite insulator and improve the service life and operation safety of the composite insulator. The preparation method is simple, has low cost and is suitable for large-scale industrial application.

The invention relates to the technical field of alloy materials and discloses a thin-wall high-CTI-value flame-retardant polycarbonate blend and a preparation method thereof. Compared with the prior art, a phosphonitrile flame retardant is added into the raw material formula of the preparation method, so that on one hand, the drawbacks that the thermal distortion temperature and flexibility of polycarbonate are substantially decreased due to the addition of an organic phosphate flame retardant in the prior art can be effectively overcome, and the heat resistance and tenacity of a polycarbonatecomposition is effectively improved; and on the other hand, the phosphonitrile flame retardant with effective nitrogen and phosphorus amounts has very good flame-retardant effect, the flame-retardantlevel of the polycarbonate composition can be effectively increased, and meanwhile, the electric leakage marking resistance of the polycarbonate composition can be greatly improved by virtue of the phosphonitrile flame retardant.

The invention discloses a glass fibrofelt laminated plate and a preparation method thereof. The glass fibrofelt laminated plate and the preparation method thereof are characterized in that the glass fibrofelt laminated plate is a composite material prepared by performing hot-press molding on one layer or more than one layer overlapped high-strength tracking-resistant resin glass fibrofelt prepreg, and the tracking-resistant index is more than or equal to 600 V; the prepreg is a material formed by dipping or spray-coating a high-strength tracking-resistant resin adhesive on alkali-free glass fibrofelt and then roasting; and the high-strength tracking-resistant resin adhesive consists of 20 to 55 parts by weight of high-temperature-resistant epoxy resin, 15 to 60 parts by weight of modified phenolic resin, 10 to 35 parts by weight of a curing agent, 5 to 35 parts by weight of inorganic powder, 0.01 to 1 part by weight of an accelerant and 100 to 130 parts by weight of a solvent. The glass fibrofelt laminated plate provided by the invention is suitable for manufacturing of insulation structural components of large generator sets and nuclear power generators as well as manufacturing of high-temperature-resistant high-strength insulating composite materials for motors, transformers, military products and the like under the high-temperature working environment.

The invention discloses a high-performance anti-tracking addition type liquid silicon rubber composition and a preparation method thereof. The composition is composed of, by mass, 100 parts of vinyl silicon oil, 40 parts of white carbon black, 6.8 parts of hexamethyldisilazane, 1.0-2.5 parts of hydrogen-containing silicon oil, 2-5 parts of fluorine-containing organic-inorganic hybrid low-melting-point glass, 1-3 parts of carbamido-containing vinyl MQ silicon rubber, 5-40ppm of platinum catalyst and 0.03 part of 1-acetenyl-1-cyclohexano. Addition type liquid silicon rubber has excellent anti-tracking performance, hydrophobic performance and mechanical performance and has quite wide application prospect in the field of high-voltage ultrahigh-voltage power transmission and transformation and electronics.

Systems and methods are disclosed that facilitate extending data retention time in a data retention device, such as a nanoscale resistive memory cell array, via assessing a resistance level in a tracking element associated with the memory array and refreshing the memory array upon a determination that the resistance of the tracking element has reached or exceeded a predetermined reference threshold resistance value. The tracking element can be a memory cell within the array itself and can have an initial resistance value that is substantially higher than an initial resistance value for a programmed memory cell in the array, such that resistance increase in the tracking cell will cause the tracking cell to reach the threshold value and trigger refresh of the array before data corruption / loss occurs in the core memory cells.

The invention relates to a high-CTI (comparative tracking index) and high-light diffusivity flame-retardant PC (polycarbonate) compound. The high-CTI and high-light diffusivity flame-retardant PC compound is characterized by being prepared from the following raw materials in parts by weight: 75-95 parts of polycarbonate, 1-6 parts of a light dispersing agent, 2-8 parts of polyethylene glycol, 0.1-1 part of an antioxidant, 0.1-0.5 part of a light stabilizer, 0.2-1.5 parts of a flame retardant and 0.1-0.5 part of a dispersing agent. The invention further relates to a preparation method of the PC compound. The prepared PC compound has excellent light diffusion performance and flame retardant property, and ultra-high tracking resistance; and the CTI value can be up to 550V.

The invention discloses a tracking-resistant ethylene propylene diene monomer sealing material and a preparation method thereof. In the prior art, the electrode sealing ring is made of the flame-retardant-system-free ethylene propylene diene monomer material, and the tracking is formed on the surface of the sealing ring, such that the ablation is formed on the sealing ring to cause the sealing failure so as to affect the safe operation of the whole current conversion valve. According to the present invention, the tracking resistance and the mechanical property of the ethylene propylene diene monomer are improved by adding the flame retardants of active aluminum hydroxide, nanometer alumina and multi-wall carbon nano-tubes, such that the problem in the prior art can be solved.

The invention relates to a fluorocarbon coating with high flame retardance, tracking resistance and electrical erosion resistance as well as a preparation method and an application of the fluorocarboncoating, and belongs to the field of electrical insulation materials. The fluorocarbon coating comprises a component A and a curing agent, the component A comprises the following raw materials by weight: 100 parts of fluorocarbon resin; 100 parts of butyl acetate; 30 to 80 parts of a composite flame retardant; 20 to 80 parts of an anti-creeping tracking agent; and 0.2-1 part of dispersing agent.The application of the fluorocarbon coating in the field of external insulation of power equipment is expanded, and the fluorocarbon coating has excellent tracking resistance and flame retardance, canresist tracking damage and provides safety guarantee. The coating is a fluorocarbon coating with good flame-retardant effect, tracking resistance and electric corrosion resistance, can resist electric corrosion and high-temperature damage caused by the electric corrosion, and opens up the application field of the fluorocarbon coating in the aspect of external insulation of power equipment.

The invention relates to the technical field of alloy materials and discloses a thin-wall high-CTI-value flame-retardant polycarbonate blend and a preparation method thereof. Compared with the prior art, a phosphonitrile flame retardant is added into the raw material formula of the preparation method, so that on one hand, the drawbacks that the thermal distortion temperature and flexibility of polycarbonate are substantially decreased due to the addition of an organic phosphate flame retardant in the prior art can be effectively overcome, and the heat resistance and tenacity of a polycarbonatecomposition is effectively improved; and on the other hand, the phosphonitrile flame retardant with effective nitrogen and phosphorus amounts has very good flame-retardant effect, the flame-retardantlevel of the polycarbonate composition can be effectively increased, and meanwhile, the electric leakage marking resistance of the polycarbonate composition can be greatly improved by virtue of the phosphonitrile flame retardant.

A polyphenylene sulfide composite material, a preparation method therefor and an application thereof. The polyphenylene sulfide composite material comprises the following components in percentage by weight: 30-60% of polyphenylene sulfide resin; 30-60% of glass fiber; 0.1-20% of a low-molecular-weight polymer plasticizer; 0.1-20% of a modifier; 0.1-10% of conductive filler; and 1-20% of polyamide. According to the polyphenylene sulfide composite material, by compounding the low-molecular-weight polymer plasticizer and the modifier, the fluidity of the polyphenylene sulfide composite material is improved, and the proof tracking performance of the material is also obviously improved; and moreover, by means of a small quantity of the conductive filler and polyamide resin, the proof tracking performance identical to that of a conventional polyphenylene sulfide composite material with high filling quantity is achieved.

The present invention includes a flame-retardant thermoplastic polyester resin composition which provides a molded article having excellent tracking resistance and excellent mechanical characteristics, while maintaining high flame retardancy; and a molded article which is obtained by molding the flame-retardant thermoplastic polyester resin composition. A flame-retardant thermoplastic polyester resin composition of an embodiment of the present invention contains 1-70 parts by weight of two or more (C) phosphorus-containing flame retardants that are selected from the group consisting of (C-1) condensed phosphoric acid esters, (C-2) phosphazene compounds and (C-3) organic metal phosphinates and 1-90 parts by weight of (D) a nitrogen-containing flame retardant per 100 parts by weight of the total of 50-95 parts by weight of (A) a thermoplastic polyester resin and 5-50 parts by weight of (B) a methacrylic resin.

The invention discloses a high-performance anti-tracking addition type liquid silicon rubber composition and a preparation method thereof. The composition is composed of, by mass, 100 parts of vinyl silicon oil, 40 parts of white carbon black, 6.8 parts of hexamethyldisilazane, 1.0-2.5 parts of hydrogen-containing silicon oil, 2-5 parts of fluorine-containing organic-inorganic hybrid low-melting-point glass, 1-3 parts of carbamido-containing vinyl MQ silicon rubber, 5-40ppm of platinum catalyst and 0.03 part of 1-acetenyl-1-cyclohexano. Addition type liquid silicon rubber has excellent anti-tracking performance, hydrophobic performance and mechanical performance and has quite wide application prospect in the field of high-voltage ultrahigh-voltage power transmission and transformation and electronics.

The invention relates to a super-hydrophobic fluorocarbon coating with high flame retardance and tracking resistance and a preparation method and an application thereof, and belongs to the field of fluorocarbon coating preparation and application, the super-hydrophobic fluorocarbon coating comprises a component A and a curing agent, the component A comprises the following raw materials by weight:100 parts of fluorocarbon resin; 100 parts of butyl acetate; 10 to 30 parts of a reinforcing filler; 50 to 100 parts of an inorganic flame retardant; 0.2-1 part of a dispersing agent; 0.1 to 0.5 partof an antifoaming agent; and 0.1-0.5 part of leveling agent. The problems of insufficient hydrophobicity, serious pollution accumulation, poor aging resistance and the like of the existing silicone rubber anti-pollution flashover coating are effectively solved, and compared with common silicone rubber coatings, the silicone rubber anti-pollution flashover coating has super hydrophobicity, can resist electric corrosion and high-temperature damage caused by the electric corrosion, and opens up the application of fluorocarbon coatings in the field of insulation in outdoor or harsh environments.