32results about How to "Little impact on other performance" patented technology

A process for adding expanded graphite to the core material raw material on the color steel insulation board production line, including using a batching tank for batching, stirring and transporting to the storage tank, and sending it to the POLY unit for storage after stirring; sending the isocyanate stored in the ISO unit into The first working tank, after the stirring is completed, it is sent into the distribution mixer through the metering pump; the polyol composition containing expanded graphite stored in the POLY unit is sent to the second working tank, and sent to the distribution mixer after stirring; mixed with expanded graphite The polyol composition and isocyanate are mixed by a cloth mixer and then foamed. The present invention establishes a production process suitable for adding expanded graphite to polyol raw materials on the production equipment of polyurethane double-sided color steel insulation board continuous line double crawler machine, including a device for adding expanded graphite, graphite is added to the raw material through a batching unit Neutralize and stir, and then through the stirring of the constant temperature unit and the mixing of the mixing unit, it ensures the uniform mixing of graphite in the raw materials and the quality of the product.

The invention relates to a low-smoke halogen-free EPDM rubber composition and a preparation method, comprising the following components in parts by weight: 100 parts of EPDM rubber; 50-100 parts of an intumescent halogen-free flame retardant; 5 parts of a filler ~15 parts; 2 to 4 parts of vulcanization assistant; 1 to 3 parts of anti-aging agent. Compared with the prior art, the flame-retardant EPDM rubber prepared by the present invention has low smoke and no halogen, reaches the UL94 (1.6mm) V-0 level, and has good mechanical and mechanical properties. At the same time, the product is white and can be toned. The application of flame retardant rubber in automobiles, electronic appliances, construction and other fields.

The invention discloses a copper clad base plate and a preparation method thereof. The copper clad base plate is formed by pressing prepreg and copper clad and adding compound quartz powder functioning as inorganic filler to glue solution made of the prepreg, wherein the weight of the compound quartz powder occupies 5-50 percent of the total weight of the glue solution. The preparation method of the copper clad base plate comprises the following steps: (1) under the room temperature, respectively adding base raw materials for preparing the glue solution to a dispensing container and mixing the base raw materials, adding the compound quartz powder functioning as inorganic filler to the mixture and mixing with the same for 6h, sampling the gel time of the test glue solution and controlling the time between 200s and 300s; (2) making adhesive plaster impregnated with the glue solution pass through a vertical or horizontal impregnating machine, and preparing the prepreg by controlling windtemperature and furnace temperature; and (3) pressing: after combining the cut prepreg with the copper clad, the cut prepreg and the copper clad are put into a vacuum hot press to be pressed for obtaining the copper clad base plate. The invention can greatly lower the cost of the glue solution, lower the coefficient of heat expansion of the product, improve the reliability of the copper clad baseplate in the preparation of printed circuit boards, and ensure the improvement on the mechanical property and the electric property of the product.

The invention relates to a scratch-resistant polypropylene material and a preparation method thereof. 0-1 part of agent, 0-0.5 part of white oil, 0.1-1 part of ZrB2. In the present invention, the inorganic material ZrB2 is added into the polypropylene material as a scratch-resistant agent, and its scratch-resistant effect can reach the first level of five-finger scratch; In a long-term high-temperature aging environment, it is easy to precipitate and migrate to the surface, and there are problems such as odor and VOC, which can be used for automotive interior parts.

The invention relates to a high-reliability low-noise amplifier, comprising a high-power input protection module and an amplifier module. The amplifier module includes an amplifier circuit, an input bias circuit and a decoupling capacitor. The first end of the input bias circuit is connected to the amplifier circuit. The input end of the first stage amplifier, the second end is grounded through a decoupling capacitor, and the high-power input protection module includes: a matching circuit for input impedance matching and DC isolation of the low-noise amplifier; a DC current detector for detecting the first stage The DC current at the input end of the amplifier is converted into a detection voltage for external output; a level conversion circuit is used to output a control signal after the detection voltage exceeds a pre-configured threshold; a limiter circuit is connected to the matching circuit at one end and grounded at the other end, and The control terminal is connected with the output terminal of the level conversion circuit, and is turned on after receiving the control signal to protect the amplifying circuit. Compared with the prior art, the present invention has little influence on other performances of the amplifier while improving the reliability of the amplifier.

The invention relates to a method for preparing SiC / graphene oxide composite modified epoxy resin. The method specifically comprises the following processes: adding nano SiC and a silane coupling agent into an aqueous graphene oxide dispersion for ultrasonic treatment; then replacing moisture in a system with an epoxy active diluent; mixing an obtained mixture with epoxy resin and a processing aid; and curing and molding to obtain an SiC / graphene oxide modified epoxy resin composite. After treatment, SiC and graphene oxide achieves nanoscale uniform dispersion in an epoxy resin matrix and forms a heat conducting network; and since SiC and graphene oxide have relatively high heat conductivity, the two fillers are collocated to significantly improve the heat conductivity of the epoxy resin.

The invention discloses a halogen-free flame-retardant copolymerized polyamide 66 resin and a preparation method thereof. Copolymerization is carried out to prepare a halogen-free copolymerization flame-retardant polyamide 66 resin. The halogen-free copolymerized flame-retardant polyamide 66 resin of the present invention is a milky white non-crystalline glass-like polymer, the melting range is 260-270°C, and the relative viscosity is 2.75-2.90; The phosphorus content is 0.6% to 0.8%, the flame retardant level is UL-94V-0, the tensile strength is not less than 80.0MPa, and the elongation at break is 64.5% to 68.5%. The halogen-free copolymerized flame-retardant polyamide 66 resin of the present invention has the characteristics of halogen-free flame retardancy, high viscosity, no droplet and high mechanical strength, and can be widely used in the fields of fibers and textiles.

The invention relates to a preparation method of the cationic dyeable halogen-free flame retardant polyester fiber, which comprises the following process steps: 1. adding monosodium isophthalic sulfonate, 2-propyloic hypophosphorous acid and de-ionized water into a reaction container, filtering out reaction products after the reaction is completed, and carrying out baking to obtain cationic dyeable flame retardant compounds; 2. adding terephthalic acid, products in the first step and glycol into an esterification kettle, then, adding antimony ethylene glycalate, conducting the materials into a polycondensation kettle, and carrying out reaction and material outlet to obtain cationic dyeable flame retardant polyester slices; and 3. drying the cationic dyeable flame retardant polyester slices prepared in the second step through a vacuum drum drying machine, carrying out spinning on the dried slices on a spinning machine according to a conventional polyester spinning process to obtain thecationic dyeable halogen-free flame retardant polyester fiber. The invention realizes the flame retardant performance and the cationic dyeable performance of the polyester through one-step addition, avoids the complicated process and the occurrence of various kinds of secondary reaction caused by a traditional method of adding flame retardant agents and cationic dyeable auxiliary agents in two steps, and has more stable and obvious flame retardant and cationic dyeable effect.

The invention provides a reactive flame retardant for epoxy resin and flame retardant epoxy resin of the reactive flame retardant, wherein the reactive flame retardant for epoxy resin comprises at least one of DOPO-AM, DOPO-Urea and DOPO-THU. DOPO is subjected to a reaction with acrylamide, urea and thiourea, and the obtained DOPO-AM, DOPO-Urea and DOPO-THU are reactive organo-phosphorus flame retardants, all of which contain an amine group. When the reactive flame retardants are added into epoxy resin, the amine groups can react with epoxy resin, so as to graft the flame retardants onto a main chain of epoxy resin, so that the migration problem of additive flame retardants is solved; the flame retardant has very good flame retardant properties, and has relatively less effect on the mechanical properties and other properties of epoxy resin, so that epoxy resin also maintains good physical and mechanical properties; moreover, the flame retardant can also improve the refractive index ofepoxy resin.

The invention discloses a preparation method of a high-refractive index addition type adhesion promoter for an organosilicone sealing adhesive. The method comprises the following steps: uniformly stirring phenylsilane and a capping agent at room temperature, adding a catalyst and deionized water, performing a reaction at 25-80 DEG C for 1-6 h, then adding epoxy silane, ester silane, boric acid andthe capping agent, performing a reaction at 40-80 DEG C for 1-6 h, and finally removing low-boiling-point substances to prepare the high-refractive index adhesion promoter. The adhesion promoter prepared in the invention has a high refractive index and a significant tackifying effect. The preparation method in the invention has the advantages of simplicity, easiness in implementation, avoiding ofring opening and other side reactions of epoxy groups, environmental protection, easily available raw materials, and easiness in realization of industrial production.

The invention provides a method for improving operation stability of a mechanical transmission chain of a direct-drive wind turbine generator. A data collecting card collects an operation variable X of the direct-drive wind turbine generator in real time. The method comprises the specific steps that 1, a mechanical transmission chain stabilization system is set according to the operation variable X and mechanical characteristics of the mechanical transmission chain; 2, the mechanical transmission chain stabilization system carries out filtering processing on the operation variable X; 3, the mechanical transmission chain stabilization system carries out dynamic compensation on a voltage reference value of the direct current capacitor end of a converter of the direct-drive wind turbine generator. Compared with the prior art, the method is simple in operation and easy to achieve. Mechanical transmission chain vibration of the direct-drive wind turbine generator caused by rotation speed changes can be quickly relieved, and the influence on unit output active power and power grid electric energy quality is little.

The invention discloses a hydrophilic antibacterial nonwoven nonwoven fabric and a preparation method thereof. The hydrophilic antibacterial nonwoven nonwoven fabric comprises a polypropylene anti-sticking nonwoven fabric base material and a water-based antibacterial layer. The hydrophilic antibacterial nonwoven fabric The preparation method of the woven non-woven fabric is that the polypropylene anti-sticking non-woven fabric substrate is subjected to corona treatment, dipped in an aqueous antibacterial solution, dried, cooled, and rolled up to obtain a hydrophilic antibacterial non-woven non-woven fabric; the present invention will The corona method used to treat film materials is introduced into the surface treatment of polypropylene anti-adhesive non-woven fabrics. After corona treatment, polypropylene anti-adhesive non-woven fabrics have good hydrophilic properties, and the treatment process is simple, fast, and low-cost. At the same time, it has little influence on other properties of polypropylene anti-sticking non-woven fabric.

The invention discloses a high linearity bias circuit applied to a radio frequency amplifier, which overcomes the problems of large performance impact, power frequency offset and signal distortion introduced by the compensation circuit in the prior art, including an output signal power acquisition and conversion circuit, A reference current control circuit and a bias voltage generation circuit; the reference current control circuit is respectively connected with the output signal power acquisition and conversion circuit and the bias circuit generation circuit. The present invention automatically adjusts the bias voltage of the bias circuit by monitoring the output signal amplitude of the radio frequency amplifier, thereby increasing the bias voltage when processing high-power signals, and compensating for the power gain to improve the linearity of the radio frequency amplifier, and can realize full chip integration and circuit The structure is simple, the response speed is fast, the parasitic parameters are small, and the performance of the core circuit of the power amplifier is small.

The present invention relates to a phosphazene compound, a composition comprising the phosphazene compound, a flame retardant comprising same, and the use thereof. The crystal form of a cyclotriphosphazene derivative flame retardant synthesized according to the present invention is the most stable crystal form, and same has a good heat stability and a high flame retardant efficiency; moreover, materials, whether engineering plastics or general-purpose plastics, as well as lithium ion battery electrolyte solutions, flame retardant fabrics and flame retardant papers, to which the crystal type cyclotriphosphazene derivative flame retardant synthesized according to the present invention has been added, are provided with an excellent flame retardant performance, a stable crystal form, and drip resistance, and only an extremely small addition amount is required to allow the flame retardant performance of a material to achieve V-0 standards, while the impact on the other properties of the material is relatively small.

The invention belongs to the technical field of alloy materials and relates to a high impact polystyrene (HIPS) resin material with excellent glossiness. The HIPS resin material with excellent glossiness comprises the following components by weight: 50 to 90 parts of high impact polystyrene resin, 10 to 50 parts of general polypropyl ethylene resin, 0.1 to 1 part of photo-thermal stabilizer and 0.1 to 1 part of processing aid. The HIPS resin material with excellent glossiness is prepared by a double-screw extrusion process, has the advantages of simple and continuous flow, high production efficiency and stable product quality; the glossiness is improved; the processing flowability is well improved; the reducing fluctuation of mechanical performance is small; influence on other performance of the material is avoided; and the characteristics of high impact strength, good appearance, high processing formation and the like are obtained. The key point is that: the material has excellent glossiness and good appearance and can be applied to injection molding of various shells or pedestals of household appliances and the like with relatively high requirement on the HIPS appearance.

The invention relates to the field of superfine-fiber polyurethane synthetic leather, in particular to application of a hyperbranched dyeing assistant to the increasing of the dyeability of superfine-fiber polyurethane synthetic leather.Hyperbranched polymer with terminal hydroxyl is synthesized first, then succinic anhydride modification is used to introduce carboxyl to the terminal of the hyperbranched polymer so as to synthesize hyperbranched polymer with terminal carboxyl.The hyperbranched polymer with terminal carboxyl is applied to the field of polyurethane dyeing assistants and is good in dyeing assisting effect, good in stability and lasting in effect, the synthesizing process of the hyperbranched polymer with terminal carboxyl is simple, industrialized synthesizing of the hyperbranched polymer with terminal carboxyl can be achieved easily, and the hyperbranched polymer with terminal carboxyl is a good polyurethane synthetic leather dyeing assistant with excellent performance.