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

The invention discloses a low-fiber-emergence low-warping high-tenacity flame-retardant PET/PETG composite material and a preparation method, and relates to the field of high polymer materials. The composite material is prepared by mixing 30-50 parts of PET resin, 5-20 parts of PETG resin, 0.1-1 part of a coupling agent, 2-8 parts of a flexibilizer, 11-15 parts of a fire retardant, 0-1 part of a nucleating agent, 0.1-1 part of an antioxidant and 0.1-1 part of a lubricating agent, adding 15-30 parts of irregular-shaped glass fibers during the extrusion process of a twin-screw extruder, extruding, and pelletizing to obtain. The preparation method of the low-fiber-emergence low-warping high-tenacity flame-retardant PET/PETG composite material disclosed by the invention utilizes the characteristic that the PETG resin is well compatible with the PET resin; the addition of the flame-retardant system PETG, the flexibilizer and the nucleating agent greatly improves the processing performance, the surface performance and the impact performance of the composite material, while influencing the other performances a little; meanwhile, the addition of the PETG and the irregular-shaped glass fibers reduces the crystallization temperature and the crystallization rate of the material, and lowers the warping degree.

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 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 the cationic 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 relates to a phosphazene compound, a composite containing the phosphazene compound, a flame retardant containing the composite and application. The crystal form of the cyclotriphosphazene derivative flame retardant synthesized by using the method is most stable, and the cyclotriphosphazene derivative flame retardant is high in heat stability and high in flame retardant efficiency; moreover, when the crystal type cyclotriphosphazene derivative flame retardant synthesized by using the method is added into a material, such as engineering plastics, general-purpose plastics, a lithiumion battery electrolyte, a flame retardant fabric and flame retardant paper, a high flame retardant performance is achieved, the crystal form is stable, the flame retardant is resistant to drip, onlyan extremely small adding amount is needed, the flame retardant performance of the material can reach the V-0 standards, and other properties of the material are little affected.

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 halogen-free flame-retardant co-polymerized polyamide 66 resin and a preparation method thereof. The preparation method is characterized in that phosphine oxide binary acid and conventional diamine are used for preparing organic ammonium phosphate which is used as a flame-retardant component to be co-polymerized with polyamide salt to prepare the halogen-free flame-retardant co-polymerized flame-retardant polyamide 66 resin. The halogen-free co-polymerized flame-retardant polyamide 66 resin is a milk-white non-crystallized glass-like polymer, a melting range is 260 to 270 DEG C, and the relative viscosity is 2.75 to 2.90; total phosphorus content of the halogen-free co-polymerized flame-retardant polyamide 66 resin material is 0.6 to 0.8 percent, the flame-retardant level is UL-94V-0 level, the tensile strength is greater than or equal to 80.0 MPa, and an elongation at break is 64.5 percent to 68.5 percent. The halogen-free flame-retardant co-polymerized polyamide 66 resin has characteristics of no halogen, flame retardance, high viscosity, no melting drop and high mechanical strength and can be widely applied to the field of fibers and spinning.

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.

The invention discloses a lithium cobalt oxide-doped lithium nickel cobalt manganate and a lithium ion battery. A preparation method for the lithium cobalt oxide-doped lithium nickel cobalt manganate comprises the following steps: a) mixing a nickel salt, a manganese salt and a cobalt salt according to a certain mol ratio and dissolving the obtained mixture; b) titrating a mixed solution obtained in the step a) by using a hydroxide solution and carrying out stirring while titrating so as to obtain spherical cobalt manganese nickel hydroxide precursor; c) washing the precursor obtained in the step b) and drying the washed precursor at a certain temperature; and d) mixing a material obtained in the step c) with Co3oO4 and Li2CO3 according to a certain proportion and carrying out calcining at high temperature so as to obtain the lithium cobalt oxide-doped lithium nickel cobalt manganate with spheroidic morphology. A compaction coefficient is increased to 3.70 g/cm<3> from original 3.56 g/cm<3>, and influence on other performance of the material is small.

The invention provides a polyamide composite material which comprises the following components in parts by weight: 80-100 parts of short-carbon-chain polyamide; and 0.1-6 parts of an amide oligomer. In the repeating units of the short-carbon-chain polyamide, the number of carbon atoms on a main chain is smaller than or equal to 6. According to the polyamide composite material as well as the preparation method and application thereof, a small amount of amide oligomer is added, so that the injection molding property of the polyamide composite material can be obviously improved, the problems of mucous membrane, top bulge and the like in the production link are improved, the production efficiency is improved, and other properties such as mechanical properties of the polyamide composite material will not be obviously reduced.

The invention discloses a preparation method of a flame-retardant cotton fabric, and relates to the technical field of flame retardance of biomass materials, and the preparation method comprises the following steps: (1) preparing an ammonium polyphosphate-aluminum hydroxide compound; (2) preparing a flame retardant solution; (3) pretreatment of the cotton fabric; and (4) dipping and flame-retardant treatment of the cotton fabric. Compared with the prior art, the preparation method of the flame-retardant cotton fabric, provided by the invention, has the advantages that the process is simple and convenient, the used flame-retardant smoke suppressant is few in variety, small in addition amount and relatively low in treatment cost, the flame-retardant efficiency on the cotton fabric is high, the flame retardance of the cotton fabric is improved, and meanwhile, the influence on other properties of the fabric is relatively small; therefore, the application range of the cotton fabric is widened, and the flame-retardant cotton fabric prepared by the method is suitable for the fields with strict flame-retardant requirements, such as furniture and indoor building decoration.

The invention discloses a high-hardness Cu-based material containing interface layers and a preparation method thereof. The material comprises Cu matrix layers and the interface layers, wherein the Cumatrix layers and the interface layers are alternately superposed; an initial layer and a final layer are Cu layers; the interlayer modulation ratio is 10:1-50:1; the interface layers are Nd, Zr, Ag,CuZr amorphous and CuNb amorphous; the thicknesses of the Cu layers are the same; the thickness range of the single Cu layer is 5-50 nm; the thicknesses of the interface layers are the same; and thethickness range of the single interface layer is 0.5-2 nm. The prepared high-hardness Cu-based material has such mechanical properties as higher hardness; and the interface layers generate no side effect on the matrix Cu. The preparation method of the Cu-based material is simple in production process, low in cost and suitable for industrial application and automatic batch production, and has unique structure and performance advantages in such fields as microelectronic components, power transmission devices, integrated circuits and printed circuits.