13results about How to "Low softening point" patented technology

The invention relates to a method for preparing spinnable mesophase pitch and carbon fibers from coal tar fractions, and belongs to the technical field of carbon materials. The method comprises the following steps: distilling and extracting aromatic hydrocarbon fractions in different distillation ranges from coal tar, activating the aromatic hydrocarbon fractions in one or more distillation ranges as raw materials, and carrying out non-catalytic polymerization reaction on one or more activated coal tar fractions and one or more non-activated coal tar fractions at a low temperature, and performing high-temperature polymerization reaction to obtain matrix asphalt, and performing reduced pressure distillation treatment, solvent extraction or inert gas purging to obtain the spinnable mesophase asphalt. The spinnable mesophase pitch has wide-area streamline optical texture distribution, good directional arrangement and orderliness, the mesophase content can reach 100%, the softening point is low, the coking value is high, the ash content is low, and the structure is controllable. The carbon fiber prepared based on the mesophase pitch is short in required oxidation time and has excellent performance.

The invention discloses a protective photovoltaic cable, relates to the technical field of photovoltaic cables, and aims to provide a protective photovoltaic cable capable of reflecting light and preventing ultraviolet rays from damaging the cable. The protective photovoltaic cable is technically characterized by comprising a battery cell assembly, and a heat insulation assembly is arranged on the outer side of the battery cell assembly; a binding assembly for fixing the position of the heat insulation assembly is arranged on the outer side of the heat insulation assembly, the outer side of the binding assembly is wrapped with an outer polyethylene protection layer, and a reflection assembly is arranged on the outer side of the outer polyethylene protection layer. The technical effects are that infrared rays and ultraviolet rays in illumination can be efficiently reflected through the reflection assembly and the aluminum foil reflection layer, the problem that the ultraviolet rays irradiate on the cable to cause accelerated aging of the cable is avoided, and the infrared rays are reflected to greatly block heat from being transmitted to the cable, so that aging of the cable due to the influence of the ultraviolet rays is prevented; and the problem of temperature rise due to the influence of infrared rays is solved.

This invention discloses an organocobalt salt for improving the tensile strength of rubber and its preparation method, belonging to the field of rubber technology. The organocobalt salt for improving the tensile strength of rubber comprises, by mass parts, 140-210 parts of organosilicon vegetable fatty acid, 20-30 parts of solvent, 20-30 parts of cobalt hydroxide, and 10-16 parts of propionic acid. The organosilicon vegetable fatty acid is obtained by reacting rosin with organosilicon maleimide. The organosilicon maleimide is obtained by reacting maleic anhydride with a silicon-containing long-chain fatty amine. The silicon-containing long-chain fatty amine is obtained by reacting methyldiethoxysilane with an unsaturated long-chain fatty amine. The organocobalt salt obtained by this invention has a good effect on promoting the adhesion between metal and rubber while effectively improving the tensile strength of rubber.

The application discloses a ceramic-based diamond grinding wheel for wafer thinning and a preparation method and application thereof, and comprises ceramic grinding blocks arranged on an aluminum alloy base; the ceramic grinding blocks comprise 20-40% of ceramic binder, 20-40% of diamond micro powder and 30-50% of pore-forming agents in percentage by mass; the ceramic binder comprises 25-50% of silicon oxide, 20-40% of boron oxide, 6-15% of sodium oxide, 6-10% of aluminum oxide, 5-7% of zinc oxide, 4-6% of zirconium oxide, 3-5% of calcium oxide, 1-3% of magnesium oxide, 1-3% of potassium oxide and 0.5-4% of lithium oxide in percentage by mass. The application introduces lithium oxide and zirconium oxide, reduces the local stress of the ceramic binder and diamond compound, and improves the binding force; sodium oxide and potassium oxide are used in cooperation to reduce the ceramic sintering temperature, and the application effectively improves the service performance of the grinding wheel and the production yield.

The invention relates to an adhesive, an insulating adhesive film for a busbar and a preparation method of the insulating adhesive film, and belongs to the technical field of insulating adhesive films. The adhesive is prepared from the following components in parts by weight: 40 to 90 parts of saturated polyester resin, 10 to 40 parts of tackifying resin, 30 to 80 parts of flame-retardant filler, 3 to 10 parts of curing agent, 0.1 to 0.5 part of curing accelerator and 50 to 300 parts of organic solvent, the softening point of the tackifying resin is 40-120 DEG C; the curing agent comprises reactive isocyanate and blocked isocyanate; the deblocking temperature of the blocked isocyanate is 70 DEG C to 120 DEG C; the mass ratio of the reactive isocyanate to the blocked isocyanate is 1: (1-5). The adhesive disclosed by the invention has excellent low-temperature fluidity and low-temperature reactivity, can be used as a hot melt adhesive layer or a semi-cured adhesive layer to finish hot pressing at a low temperature of 120-140 DEG C in a short time of 240-600s, and has good bonding strength on pure copper and plated parts thereof; and the adhesive has no initial adhesion at normal temperature, and can be positioned on a busbar.

The application belongs to the technical field of continuous casting and particularly relates to a high-nitrogen Fe-Ni-based alloy protective slag. According to mass percentage, the high-nitrogen Fe-Ni-based alloy protective slag comprises SrO: 14-16%, CaF2: 11.5-13.5%, SiO2: 24-26%, Na2O+K2O: 12-14%, B2O3: 7-9%, Al2O3: <1%, MgO: 8-10%, La2O3: 10-12%, and the rest is carbonaceous material and inevitable impurities. Through accurate slag system design and component regulation, the protective slag has excellent performances of rapid slag formation, high lubrication and phased heat control, effectively solves the crack problem in the high-nitrogen Fe-Ni-based alloy continuous casting process, and meets the actual needs of the large-scale production of the continuous casting.

The invention discloses boron-doped silicon dioxide, a preparation method thereof and low-melting-point borosilicate glass, and belongs to the technical field of silica sol. The preparation method of the boron-doped silicon dioxide comprises the following steps: uniformly mixing a boric acid solution, an aluminum sol, a potassium oxalate solution, a sodium carbonate solution and a silica sol, carrying out a hydrothermal reaction in a pressurized state, cooling to obtain homogeneous boron-doped silicon dioxide gel, and finally drying to obtain homogeneous boron-doped silicon dioxide particles. Boron is doped under a high-temperature and high-pressure hydrothermal condition to form a hydrothermal stable boron-doped silicon dioxide skeleton, so that the stability and the thermal expansion coefficient of the material are enhanced.

The invention relates to a high-acid-value polyester resin for a TGIC (triglycidyl isocyanurate) dry-mixed extinction type powder coating, which is obtained by copolymerizing 2-methyl-2, 4-pentanediol, pinacol, octadecanedioic acid, 3, 3-dimethyl glutaric acid, 2, 4-dimethylaniline-6-sulfonic acid, isophthalic acid, ethyl malonic acid and the like. Finally, when the high-acid-value polyester resin product provided by the invention is matched with a commercially available low-acid-value polyester resin product to prepare a TGIC (triglycidyl isocyanurate) dry-mixed extinction powder coating, not only can a lower gloss range be realized, but also better leveling level and surface fineness can be obtained, and the defects of the existing high-acid-value polyester resin can be better overcome.

The present invention relates to the field of glass preparation, specifically to a glass, an integrated glass and a glass product. The present invention provides a glass, comprising: 58wt% to 72wt% SiO2; 5wt% to 14wt% Al2O3; 3.5wt% to 6.5wt% CaO; 2wt% to 6wt% MgO; 12wt% to 19wt% Na2O; and 4.05wt% to 8wt% K2O. The glass provided by the present invention can achieve the characteristics of low softening point and easy strengthening through the effective combination of various oxides and the synergistic effect between them. It is easy to heat form and has high strength and low preparation cost. Experiments show that the softening point of the glass provided by the present invention is much lower than that of the glass of the comparative example. Its softening point is basically less than 760°C, and the lowest reaches 708°C. At the same time, the strengthening performance data shows that the glass provided by the present invention has the characteristics of high strength.

The present invention provides a coating asphalt solid phase composition, a modified asphalt coated natural graphite negative electrode material and its preparation and a lithium ion battery, wherein the coating asphalt solid phase composition is used to form an amorphous carbon coating layer coated on the surface of natural graphite, including coating asphalt and a modification aid, wherein the mass ratio of natural graphite, coating asphalt and modification aid is 1000:45-80:3-12; the modification aid includes a saturated long chain component, a low molecular wax component and a component containing a modification group in a mass ratio of 2-10:0.5-5:0.5-7. The present invention reduces the softening point and viscosity of asphalt, improves the wettability and contact of asphalt to graphite, improves the density and uniformity of the coating layer, and thus improves the electrochemical performance of the natural graphite negative electrode material by adding a modification aid. The negative electrode material of the present invention has a higher first-week coulomb efficiency, better cycle performance, lower impedance and lower specific surface area under the condition of low asphalt addition.

The invention provides a preparation method of a water-based pigment dispersing agent for painting and the dispersing agent, and belongs to the field of pigments, four monomers of styrene, diallyl maleate, allyl maleate quaternary ammonium salt monomer and acrylic acid are adopted to synthesize a segmented copolymer solution, and then fatty alcohol-polyoxyethylene ether is used as a grafting modifier for modification. The allyl maleate quaternary ammonium salt monomer is obtained by preparing an intermediate from N-methylamine and allyl maleate ethylene oxide and recrystallizing and purifying the intermediate and a bromoalkane compound, and due to the fact that the allyl maleate quaternary ammonium salt monomer has the same structural unit as diallyl maleate, the molecular structure of the polymer is more stable; the polymer has a hydrophobic tail part and a positively charged head part consisting of an alkyl chain, so that the combination stability of the polymer and pigment particles in an aqueous medium is facilitated; branched alkyl and polyoxyethylene chain in the structure of fatty alcohol-polyoxyethylene ether have hydrophilic and hydrophobic properties at the same time, so that the dispersion effect and storage stability of the dispersant are further improved.

This invention relates to an ultra-low temperature ceramic binder, which is mainly composed of the following raw materials in the indicated mass percentages: Bi₂O₃: 40-80%, B₂O₃: 5-15%, ZnO: 10-35%, SiO₂: 0-5%, Li₂O: 0.5-3%, TiO₂: 0-5%, CaF₂: 2-10%, Y₂O₃: 0-5%. This binder can be fired at a minimum temperature of 400°C and softened at a minimum temperature of 320°C. It enables the ceramic binder to achieve bonding and consolidation before the polymeric pore-forming agent and temporary polymeric binder burn off, maintaining the integrity of the pore structure while achieving a high porosity. Furthermore, using this ceramic binder and a preferred polymeric pore-forming material, it is possible to construct spherical pores with interconnected microscopic gaps, and the pore size can be controlled during preparation.

The invention discloses an environment-friendly large-gram-weight packaging composite sheet which is formed by compounding three layers of materials including an outer-layer composite film, an aluminum foil layer and an inner-layer composite film, and the outer-layer composite film, the aluminum foil layer and the inner-layer composite film are compounded through bonding layers; and the outer-layer composite film and the inner-layer composite film are prepared by a film blowing process and an improved film formula. The invention further provides a solvent-free compounding process of the environment-friendly large-gram-weight packaging composite sheet. The composite sheet provided by the invention is high in peel strength, good in barrier property, excellent in medium resistance, excellent in comprehensive performance, low in cost, environment-friendly and safe. The solvent-free composite process provided by the invention solves the problems of white points and bubbles on the composite film, insufficient composite peel strength, increased friction coefficient of the composite film, irregular rolling, tunnel phenomenon and the like in the conventional solvent-free composite process, and successfully applies the solvent-free composite process to the preparation of the large-gram-weight packaging composite sheet.