10 results about "Boroxine" patented technology

The invention discloses an anti-ultraviolet spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the anti-ultraviolet spinning yarn is prepared, 2, 4, 6-tri (4-hydroxyphenyl) boroxane and methylphenyl phosphonium chloride are subjected to a reaction, and a phosphorus-boron composite flame retardant is prepared; the preparation method comprises the following steps: polymerizing indole and 5-(aminomethyl) indole to coat the surface of nano titanium dioxide to prepare pre-modified nano titanium dioxide; the pre-modified nano titanium dioxide and (3-acryloyloxypropyl) tri (trimethylsiloxy) silane are subjected to a reaction, and modified nano titanium dioxide is prepared; mixing poly (pentamethylene diamine adipate), the modified nano titanium dioxide and the phosphorus-boron composite flame retardant, and performing melt spinning to obtain polyamide fibers; spinning polyamide fibers to obtain polyamide spun yarns; the polyamide spinning yarn is sequentially finished with the chloroacetic acid finishing liquid and the isoliquiritigenin finishing liquid, and the anti-ultraviolet spinning yarn is prepared. The anti-ultraviolet spinning yarn prepared by the invention has excellent anti-ultraviolet, flame-retardant and anti-static properties.

The application provides a fluorine-free ester-based electrolyte, a preparation method and a high-voltage lithium ion battery. The fluorine-free ester-based electrolyte comprises a lithium salt, a fluorine-free solvent and a fluorine-free additive; the fluorine-free solvent is a methylated linear carbonate and / or a methylated linear carboxylate, and the fluorine-free additive is a cyclic boroxine or a cyclic siloxane with 3-5 carbon-carbon double bonds; the methylated linear carbonate has a general structural formula as shown in formula (1); wherein R1 and R2 are independently alkyl groups with 1-4 carbon atoms, and the carbon atom number of at least one of R1 and R2 is greater than or equal to 3; the methylated linear carboxylate has a general structural formula as shown in formula (2); wherein R3 is a hydrogen atom or an alkyl group with 1-4 carbon atoms, R4 is an alkyl group with 2-4 carbon atoms, and the carbon atom number of at least one of R3 and R4 is greater than or equal to 3. The fluorine-free ester-based electrolyte can significantly prolong the cycle life of the lithium ion battery.

The application discloses an anti-erosion refractory material for a recycled aluminum smelting furnace and a preparation method thereof, and belongs to the technical field of green special refractory ceramics. The anti-erosion refractory material for the recycled aluminum smelting furnace comprises the following raw materials in parts by weight: refractory aggregate 65-70 parts, matrix fine powder 15-20 parts, binding agent 5-10 parts, and dispersing agent 0.5-1 part. The binding agent is generated by 2-formylphenylboronic acid dehydration condensation to form a boroxin compound, the boroxin compound is reacted with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane to generate a Schiff base compound, the Schiff base compound is reacted with epichlorohydrin to generate a tertiary amine compound, and the tertiary amine compound is reacted with 4-aminobutylphosphoric acid to generate the binding agent. The anti-erosion refractory material for the recycled aluminum smelting furnace prepared by the application has excellent normal-temperature bending strength, thermal shock resistance and slag resistance.

The present application belongs to the technical field of heat protection materials, and particularly relates to a fiber-reinforced silicon-boron modified phenolic aerogel multiphase composite material with ablation resistance and heat management functions and a preparation method thereof. The method comprises the following steps: (1) preparing a silicon modified phenolic resin; (2) synthesizing a silicon boroxine prepolymer modified phenolic resin solution; (3) preparing a reaction precursor solution; (4) vacuum impregnating a fiber preform; (5) sol-gel and phase separation; and (6) drying and filling a phase change material. The present application controls the reaction parameters in the modification process of the phenolic resin, forms a silicon boroxine oligomer under mild conditions, and inhibits the hydrolysis of silicon and boron components from the molecular level, so as to realize the stable introduction of high content silicon and boron components into the molecular chain of the phenolic resin. The filling of a high-enthalpy phase change material makes the heat transfer in the thickness direction of the material present a nonlinear delay, and can effectively inhibit the temperature rise rate on the back surface of the material within a given heating time.

The invention provides an electrolyte and a lithium ion battery, the electrolyte comprises a first additive and a second additive, the first additive contains boroxane and an unsaturated substituent group, the generation of a passivation film of lithium boride and inorganic / organic composite components is facilitated, and the internal resistance of the battery can be effectively reduced; the second additive comprises a sulfate group, and the sulfate group can preferentially decompose the solvent on the surface of the negative electrode to generate an inorganic salt containing sulfur (mainly low-valence sulfur) and an organic framework substance, so that the continuous decomposition of the electrolyte solvent on the surface of the negative electrode is effectively inhibited; besides, siloxane groups can react with water to inhibit acid rise of electrolyte, HF is prevented from attacking a positive electrode CEI film, and dissolution of transition metal is reduced, so that high-temperature-resistant cycle performance, gas production performance during high-temperature-resistant storage and capacity fading and impedance increase under high voltage are improved.

The application discloses a kind of flame-retardant water-resistant polyether type polyurethane elastomer and preparation method thereof, and relates to the technical field of polyurethane elastomer.The application first prepares boroxin intermediate BOX, then reacts with dimethyl methylphosphonate to obtain reactive phosphorus-containing boroxin flame retardant DMPB, which is introduced into polyurethane elastomer as halogen-free flame retardant.The obtained material has significantly improved limiting oxygen index, reaches UL-94 V-0 level, and has outstanding smoke suppression and toxicity reduction effect;continuous dense carbon layer is formed during combustion, and the mechanical and adhesive properties are excellent, halogen-free, environmentally friendly, water-resistant and stable, suitable for new energy vehicles and electronic components potting and other fields with high requirements for flame retardance and water resistance.

The invention discloses a UV-cured polyurethane pressure-sensitive adhesive and a preparation method thereof, and belongs to the technical field of pressure-sensitive adhesives, the pressure-sensitive adhesive comprises the following raw materials by weight: 100 parts of disulfide bond-carrying polyurethane acrylate, 1-3 parts of a photoinitiator, 14-16 parts of tackifying resin, 8-12 parts of an active diluent, and 0.5-2 parts of a cross-linking agent; according to the UV-cured polyurethane pressure-sensitive adhesive and the preparation method thereof, the UV-cured polyurethane pressure-sensitive adhesive is prepared by taking the polyurethane acrylate carrying the disulfide bond as a main raw material, and by utilizing reversible fracture and recombination of the disulfide bond under an external force, the UV-cured polyurethane pressure-sensitive adhesive can be prepared into the UV-cured polyurethane pressure-sensitive adhesive; and a dual dynamic covalent network is constructed by cooperating with a boroxane crosslinking agent with dynamic borate bonds and unsaturated double bonds, so that the initial adhesive force and cohesive strength of the pressure-sensitive adhesive are effectively balanced and improved.

The application discloses a kind of irradiation crosslinking cable insulating material and cable, belong to cable insulating material technical field.The cable insulating material includes the following mass fraction components: olefin block copolymer 40-60 parts, low-density polyethylene 20-30 parts, tripropargyl boroxin 2-4 parts, maleic anhydride grafted polyolefin 10-20 parts, amine group-containing polyphosphazene derivative 8-12 parts, antioxidant 0.6-1 part, lubricant 0.5-1.5 parts, toner 2-5 parts and auxiliary agent 0.1-0.3 parts.The cable insulating material occurs catalyst-free click chemistry reaction under electron beam irradiation through tripropargyl boroxin and amine group-containing polyphosphazene derivative, builds intrinsic network, combines OBC / LDPE blend matrix and maleic anhydride grafting, realizes antioxidant protection, efficient crosslinking and P-N-B synergistic flame retardation, process adaptability is strong, no small molecule is precipitated, and it is suitable for new energy charging pile cable.

The present application relates to the technical field of conjugated diene catalytic polymerization, and discloses a method for preparing polyconjugated diene, products and applications.The method comprises the following steps: in the presence of a ferrous cyclic boroxine catalytic system, a conjugated diene is subjected to a polymerization reaction to obtain polyconjugated diene; wherein the ferrous cyclic boroxine catalytic system comprises an N, N-bidentate carboxylic acid iron catalyst, an alkyl aluminum and a cyclic boroxine compound.In the present application, the inexpensive cyclic boroxine compound is applied to the polymerization of conjugated diene hydrocarbon, and the electron donor cyclic boroxine compound is used as the third component in the catalytic system, which can adjust the Lewis acidity of the metal center when coordinated with the metal, maintain the stability of the metal center, thereby realizing stable and efficient conjugated diene hydrocarbon polymerization, and reducing the cost of the catalytic system for conjugated diene catalytic polymerization.