30results about How to "Low softening point" patented technology

The invention provides an asphalt solid-phase composition for coating, a modified asphalt coated natural graphite negative electrode material, preparation of the modified asphalt coated natural graphite negative electrode material and a lithium ion battery, and the asphalt solid-phase composition for coating is used for forming an amorphous carbon coating layer coated on the surface of natural graphite and comprises coated asphalt and a modification additive, the mass ratio of the natural graphite to the coated asphalt to the modification additive is 1000: (45-80): (3-12); the modification additive comprises 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). By adding the modification additive, the softening point and viscosity of the asphalt are reduced, the wetting contact property of the asphalt to graphite is improved, the density and uniformity of a coating layer are improved, and the electrochemical performance of the natural graphite negative electrode material is further improved. The negative electrode material provided by the invention has higher first-cycle coulombic efficiency, better cycle performance, lower impedance and lower specific surface area under the condition of low asphalt addition amount.

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.

The invention discloses a low-temperature hot melt adhesive and a preparation method thereof, and relates to the technical field of polyolefin system hot melt adhesives. The invention relates to a low-temperature hot melt adhesive, which is prepared from 45 to 65 parts of matrix resin, 28 to 44 parts of tackifying resin, 3 to 6 parts of SIS rubber, 3 to 6 parts of wax material, 1.6 to 2.5 parts of polyisobutene, 5 to 8 parts of maleic anhydride grafted POP, 3 to 4 parts of reinforcing filler and 0.5 to 1 part of antioxidant, the tackifying resin is compounded from petroleum liquid resin and at least one of C5 hydrogenated petroleum resin or C5 / C9 copolymerized petroleum resin, and the SIS rubber is SIS rubber containing 25%-35% of two-block SI. The APAO resin is used as the matrix resin of the hot melt adhesive, and is matched with the tackifying resin, the SIS rubber and the reinforcing filler, so that the prepared polyolefin hot melt adhesive has a lower softening point, can be molten and normally used without being heated to 150 DEG C or above, is beneficial to reducing the risk of being scalded during use, and greatly improves the safety of the polyolefin hot melt adhesive.

The invention relates to the field of road asphalt material regeneration and maintenance, in particular to a hot in-place recycling asphalt regenerant and a preparation method thereof. The hot in-place recycling asphalt recycling agent is prepared from the following raw materials in parts by weight: 100 to 140 parts of base oil, 2 to 5 parts of polylactic acid, 0.5 to 3.5 parts of cellulose, 5 to 10 parts of an inorganic auxiliary agent and 1 to 3 parts of an anti-aging agent, the inorganic auxiliary agent comprises one or more of diatomite and hydromica. The regenerant disclosed by the invention is added into the aged asphalt, so that the needle penetration of the aged asphalt is improved by 94.3-101.7 mm, the ductility at 5 DEG C is improved by 36.6-43.2 cm, the softening point is reduced by 5.9-9 DEG C, and the regenerant plays a great role in performance recovery of the aged asphalt.

The invention provides mesophase pitch and a preparation method thereof, and relates to the technical field of deep processing of petroleum. The method comprises the following steps: by taking aromatic hydrocarbon-rich heavy oil as a raw material, introducing a proper cross-linking agent, synthesizing an oligomer with a weak magnetic triarylmethane structure through low-temperature catalytic polycondensation reaction, enriching and separating the oligomer with the triarylmethane structure by matching with a strong magnetic field under the condition of negative pressure, and then taking the aromatic hydrocarbon-rich heavy oil as a raw material to synthesize the aromatic hydrocarbon-rich heavy oil. And introducing an oil-soluble fluorine-containing complex as a catalyst, and promoting further polycondensation of the oligomer with the triarylmethane structure through a two-stage catalytic polycondensation reaction under a negative pressure condition to form polycyclic aromatic hydrocarbon macromolecules with high molecular weight. According to the process, a triarylmethane structure is successfully introduced into mesophase pitch molecules, so that the spatial configuration and the stacking state of the pitch molecules are improved, and the spinning performance of the mesophase pitch and the mechanical property of the carbon fiber are remarkably improved.

The invention discloses alkali-free glass with low reheat shrinkage rate as well as a preparation method and application thereof, and the glass is prepared from the following raw materials in percentage by mass: 60 to 65 percent of SiO2, 17 to 21 percent of Al2O3, 0 to 2 percent of B2O3, 4 to 8 percent of SrO, 3 to 5 percent of CaO, 4 to 7 percent of MgO, 0 to 3 percent of BaO and 0 to 2 percent of SnO. The alkali-free glass which is high in strain point, low in softening point and high in ultraviolet transmittance and meets the requirement of a polycrystalline silicon process is prepared by adopting an overflow down-draw method process under a conventional annealing condition according to a raw material ratio, on one hand, by increasing the content of SiO2, the strain point of the glass is increased, and the reheat shrinkage rate is reduced at the same time; on the other hand, BaO is introduced to regulate the density of the glass and improve the strain point temperature of the glass, the reheat shrinkage rate (600 DEG C / 1h) of the prepared alkali-free glass is below 35ppm, the strain point reaches above 707 DEG C, the softening point temperature is about 820 DEG C, the thermal expansion coefficient is 3.4 * 10 <-6 >-4.0 * 10 <-6 > / DEG C, the density is 2.52-2.57 g / cm < 3 >, the hardness is 685-712kgf / mm < 2 >, and the transmittance reaches above 74% when the visible light wavelength lambda is 308nm.

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 utility model discloses a cold-resistant tensile automobile cable, which relates to the technical field of automobile cables and comprises a tensile layer, the tensile layer is made of aramid fibers, a small amount of water-blocking fibers are mixed in the aramid fibers of the tensile layer, and the outer surface of the tensile layer is smoothed. The tensile layer is made of aramid fibers mixed with water-blocking fibers, the aramid fibers are novel synthetic fibers, have the excellent performance of ultrahigh strength, high modulus, high temperature resistance, acid and alkali resistance and light weight, and cannot be decomposed or melted at the temperature of 560 DEG C. The main function of the aramid fibers is to provide strong tensile capacity, and the tensile layer is made of water-blocking fibers. The cable is protected from being stretched and twisted excessively, so that the service life of the cable is prolonged, and in addition, the aramid fibers have good insulativity and ageing resistance, so that the safety and the reliability of the cable can be improved.

The invention relates to polyester resin for a high-temperature-resistant and high-leveling HAA powder coating, and the polyester resin is obtained by polymerizing the following raw materials: chlorophenyl methyl dichlorosilane, dimethyl dichlorosilane, 2-methyl-1, 3-propylene glycol, 3-tert-butyl dimethyl siloxy glutaric anhydride, neopentyl glycol and 2-ethyl-2-methylsuccinic acid. The prepared polyester resin is low in acid value and large in terminal carboxyl steric hindrance, on one hand, the use amount of an HAA curing agent needed during curing is small, the cost of the powder coating is reduced, on the other hand, water molecules generated during curing are reduced, the curing and leveling time is prolonged, full escape of small molecule water is facilitated, the effect of resisting thick coating pinholes is obvious, and the coating effect is good. And a coating film cured with HAA is resistant to high temperature and relatively good in leveling property.

The present invention relates to the technical field of modified asphalt materials, and proposes a flame retardant modified asphalt and a preparation method thereof. The flame retardant modified asphalt comprises the following components in parts by weight: 35-50 parts of base asphalt, 2-5 parts of smoke suppressant, 2-5 parts of coupling agent, 0.1-0.5 parts of organic phosphorus flame retardant, 1-3 parts of expandable graphite, 1-3 parts of nano-layered silicate clay, 1-3 parts of dispersion stabilizer, 6-12 parts of softening oil, 25-40 parts of filler, 3-8 parts of SBS, 2-6 parts of resin, and 5-8 parts of rubber powder. Through the above technical scheme, the problems of poor storage stability and low-temperature ductility of flame retardant modified asphalt in the prior art are solved.

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 relates to a low-cost, high-leveling polyester resin for powder coatings. The polyester resin is mainly obtained by polymerization using refined kitchen waste oil, trimethylolpropane, 1,2,6-hexanetriol, triethylene glycol, isophthalic acid, brassyl acid, terephthalic acid, and adipic anhydride as main raw materials; the polyester resin chain segment finally obtained contains a large amount of C 16 ‑C 18 The product has excellent water resistance and a low softening point of 90-100°C. It also makes comprehensive use of the triglyceride components of refined kitchen waste oil, which has a low cost. In addition, the terminal carboxyl group of the polyester resin has small steric hindrance and high activity. Finally, after low-temperature curing with E-12 at 160°C / 15min, the resulting 60 / 40 polyester resin coating has an excellent leveling effect, with a leveling grade of 7 or above. It can be used in indoor coatings in areas with high requirements for leveling grades.

The invention discloses a solvent-free epoxy curing agent, comprising 50-100 parts of benzyl polyamine, 20-50 parts of polyamine-epoxy adduct, and 0-20 parts of accelerator. The solvent-free epoxy curing agent provided by the invention effectively improves the comprehensive performance of the curing agent by combining the amine curing main body in the curing agent with other auxiliary components.

The invention discloses impregnated asphalt as well as a preparation method and application thereof. The impregnated asphalt comprises the following components in parts by weight: 100 parts of pretreated aromatic hydrocarbon extract oil; 50 to 90 parts of pretreated ethylene tar; and 20 to 60 parts of a composite component. The impregnated asphalt disclosed by the invention can meet the index requirements of the national coking impregnated asphalt standard GB / T 35074-2018 coking impregnant asphalt on the No.2 product.

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 present application relates to the technical field of resin materials, and specifically discloses a low-temperature compression-change resin and a preparation method thereof. A low-temperature compression-change resin comprises the following raw materials in parts by weight: 53‑58 parts of polyester polyol, 8‑9 parts of chain extender, 26‑29 parts of diphenylmethane diisocyanate, and 210‑230 parts of dimethylformamide; the polyester polyol comprises a butanediol polyol and an ethylene glycol polyol in a weight ratio of 1: (1‑1.7); the chain extender comprises a butanediol and ethylene glycol in a weight ratio of 1: (1‑1.4). The low-temperature compression-change resin of the present application can achieve an ideal compression-change effect at 140°C or even 120°C, and the color development after compression-change is uniform.

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.

The invention relates to an easy-to-peel and high-temperature-resistant wafer bonding adhesive as well as a preparation method and application thereof. The bonding glue is prepared from the following components in parts by weight: 10 to 40 parts of basic resin, 10 to 40 parts of bonding resin, 40 to 80 parts of high-boiling-point solvent and 0.1 to 0.8 part of wetting agent. The base resin is a modified styrene butadiene rubber-polyvinyl acetate blend. The tensile strength of the grafted styrene-butadiene rubber is increased, the grafted styrene-butadiene rubber changes the rheological property of polyvinyl acetate through blending, the rheological viscosity of the obtained blend is reduced, the softening point of the compounded bonded rubber is reduced, the bonding temperature is reduced, and the thermal stability is greatly 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.

The invention provides a pouring type asphalt modifier and a processing method thereof, and the method comprises the following steps: mixing high-softening-point natural asphalt and softening oil in proportion by a high-speed mixer, and mixing and extruding at high temperature by a screw extruder to form pouring type asphalt modifier solid particles; the softening temperature of the high-softening-point natural asphalt is 180 DEG C or above; the mass ratio of the high-softening-point natural asphalt to the softening oil is (70-85): (15-30); the rotating speed of the high-speed mixer is more than 60 revolutions per minute; the high-temperature mixing temperature of the screw extruder is 230 to 260 DEG C. The obtained pouring type asphalt modifier can reduce the processing temperature of pouring type asphalt and improve the dissolution and dispersion speed of natural asphalt at the same time. In addition, the solid particle modifier is formed through a new processing method, and dust pollution and the like in the processing process are reduced.

The invention discloses a low-temperature curing powder coating for the inner wall of a drinking water steel pipe as well as a preparation method and application thereof. The bisphenol F type epoxy resin, the polyamide curing agent, the modified alicyclic amine curing agent and the diphenylimidazoline modifier are compounded for use, other inorganic materials in the formula can be effectively coated and wetted, the adhesive force of the coating to a base material is also increased while a cross-linked body is formed, and the catalytic action of the diphenylimidazoline modifier improves the adhesion of the coating to the base material. And the product coating construction temperature of 120-130 DEG C can be provided. By adding the diphenyl imidazoline modifier, the pre-reaction can be reduced, and a coating with excellent mechanical property and high safety can be formed when the coating is applied to the inner wall of the drinking water steel pipe. Besides, the grinding column and the gear ring of the ACM flour mill are made of medium / low carbon alloy steel, carbonitriding surface heat treatment is carried out, the abrasion resistance is high, the situation that the metal content exceeds the standard due to the fact that the surfaces of the grinding column and the gear ring are damaged in the high-speed running process is avoided, and it is further ensured that the anhydrous quality meets the requirement of GB-5749 drinking water.

The invention relates to a construction strategy and a preparation method of phosphorus-containing epoxy resin with a low softening point for carbon fibers, and belongs to the technical field of preparation of halogen-free flame-retardant high polymer materials. According to the material, basic epoxy resin, a reaction type phosphorus-containing flame retardant, 1, 4-naphthoquinone and 1, 4-benzoquinone are used as basic raw materials, a phosphorus-containing diphenol compound is synthesized in a segmented reaction mode and then subjected to chain extension with the basic epoxy resin under the action of a catalyst, finally, novolac epoxy resin is added to adjust the molecular weight, and an epoxy diluent is added to improve the viscosity of a resin system, so that the material is obtained. The low-softening-point phosphorus-containing epoxy resin is obtained. According to the preparation method, the phosphorus content and molecular weight of the product are effectively controlled in a formula design and segmented reaction mode, so that the phosphorus-containing epoxy resin with low softening point and good flame retardance is prepared and can be applied to carbon fiber halogen-free flame-retardant prepreg.

The invention relates to a low-temperature curing excellent-leveling polyester resin for a 70 / 30 mixed powder coating. The low-temperature curing excellent-leveling polyester resin is prepared by copolymerizing recycled frying waste oil, 2-ethylhexyl acrylate, acrylic acid, xylene, neopentyl glycol, E-51 liquid epoxy resin, terephthalic acid, glutaric anhydride and the like. A glyceride chain segment is introduced into a polyester resin chain segment, so that the product is relatively low in softening point and good in leveling property; due to the introduction of the E-51 liquid epoxy resin, the adhesive force of the polyester resin and a base material is improved, the final product is good in low-temperature fluidity and high in terminal carboxyl activity, the 70 / 30 polyester resin and the E-12 epoxy resin can be subjected to low-temperature curing (145 DEG C / 15min), and the leveling grade is high; and the recycling of the recycled frying waste oil is fully realized, and the method has better environmental protection and economic values.