311 results about "Isophthalic acid" patented technology

The invention discloses unsaturated polyester resin for an optical cable reinforcing core and a preparation method thereof, and belongs to the technical field of unsaturated polyester resin. The composition is composed of the following components: PG, IPA, a catalyst, maleic anhydride, AA, styrene, an antioxidant, a first polymerization inhibitor, a second polymerization inhibitor and a third polymerization inhibitor. The ratio of alcohol to acid is (1.08-1.12): 1; the activity is (3.4-3.8): 1; the molar ratio of AA to IPA is 1: (12-16); the preparation method comprises the following steps: 1) uniformly mixing propylene glycol, a catalyst and isophthalic acid; 2) raising the temperature, preserving the heat and raising the temperature again; cooling, sequentially adding a first polymerization inhibitor, maleic anhydride and adipic acid, heating, keeping the temperature, and heating again; 3) cooling and adding a second polymerization inhibitor, and 4) cooling and adding styrene, a third polymerization inhibitor and an antioxidant, uniformly mixing, and cooling to less than or equal to 60 DEG C to obtain the unsaturated polyester resin for the optical cable reinforcing core. The unsaturated polyester resin for the optical cable reinforcing core has the characteristics of high bending strength and high temperature resistance.

This invention discloses a one-piece molded all-plastic flexible hose sheet and its composite hose, belonging to the field of polymer material technology. The one-piece molded all-plastic flexible hose sheet of this invention has a three-layer structure: an outer PE film, an intermediate layer, and an inner PE film. The intermediate layer is selected from one of the following: an intermediate polymer layer, a three-layer composite layer formed by an intermediate polymer layer, a polyethylene layer, and an intermediate polymer layer, or a three-layer composite layer formed by an intermediate polymer layer, an ethylene-vinyl alcohol copolymer layer, and an intermediate polymer layer; the intermediate layer may have a double-sided coated or uncoated adhesive layer; the intermediate polymer layer is polymerized from 2,6-dihydroxyisophthalic acid, diaminoalkane, and 4,4'-tetraphenylsilane. The all-plastic flexible hose sheet provided by this invention is formed in one piece using a five-layer co-extrusion machine, possessing excellent gas barrier properties, water vapor barrier properties, high mechanical strength, and good interlayer peel strength.

The invention discloses a simple preparation method of a barium-based metal organic framework (Ba-H2Sip) and proton conduction application of the barium-based metal organic framework (Ba-H2Sip), belongs to the field of functional material synthesis and energy application, and is characterized in that functional differentiation design of a 5-sulfoisophthalic acid ligand: a sulfonic group forms a two-dimensional layered structure by chelating Ba < 2 + >; the carboxyl groups are differentiated into'anchoring carboxyl groups' for constructing a three-dimensional supramolecular skeleton and'proton supply carboxyl groups' for providing a proton source, and the design is reported for the first time in Ba-based MOFs; according to the present invention, the large-scale preparation can be achieved by stirring the low-cost raw material in 1 mol / L hydrochloric acid at the room temperature, the yield exceeds 70%, the product can resist 8 M acid and pH = 13 alkali liquid, the conductivity at 90 DEG C / 90% humidity can achieve 1.39 * 10 <-2 > Scm <-1 >, the high-temperature process is not required, the raw material is low in cost and easy to obtain, and the feasible scheme is provided for the high-efficiency proton conductor industrialization.

A desulfurizing agent according to the present disclosure is a desulfurizing agent for removing a sulfur compound from a fluid containing moisture and the sulfur compound, the desulfurizing agent comprising: at least one metal ion selected from the group consisting of aluminum ions, iron ions, and copper ions; and an organic ligand coordinated to a metal ion, the organic ligand containing isophthalic acid optionally having a substituent group at the 5-position of a benzene ring, and diffraction peaks respectively present in the range of diffraction angles of 10.9 DEG + / -0.3 DEG and the range of diffraction angles of 18.1 DEG + / -0.3 DEG in an X-ray diffraction pattern of the desulfurizing agent measured using Cu-K alpha rays.

Provided is a toner that includes a toner particle containing a binder resin; and an external additive, wherein the binder resin contains a polyester resin A; when a content of the polyester resin A in the binder resin is taken as Wp (mass %), Wp is 50 mass % or more; when a content ratio of the monomer unit Uiso corresponding to isophthalic acid to all monomer units corresponding to polycarboxylic acids in the polyester resin A is taken as MIPA (mol %), MIPA is 40 mol % or more; the external additive contains inorganic fine powder; and the inorganic fine powder contains a silica fine particle having aluminum hydroxide on the surface thereof.

The application discloses an indium-based oxide catalyst, which is prepared by the following method: step one, adding indium nitrate, isophthalic acid, DMF, acetonitrile, imidazole and nitric acid into a reaction kettle, reacting at 80 DEG C for 12 hours, then heating to 100 DEG C and reacting for 24 hours, washing with DMF and anhydrous ethanol respectively, and vacuum drying for 12 hours to obtain an In-MOF precursor; step two, keeping the In-MOF precursor under the condition of nitrogen atmosphere and 200-600 DEG C for 4 hours, and naturally cooling to room temperature to obtain the indium-based oxide catalyst. Most of the prepared indium-based oxide catalysts still retain the corresponding three-dimensional hierarchical porous framework structure of the original MOF; the indium-based oxide catalyst contains highly dispersed metal active sites inside, effectively reduces the aggregation of metal oxides or metal elements, and thus exhibits more excellent catalytic activity; the organic ligand isophthalic acid generates a large amount of carbon material through pyrolysis under an inert atmosphere, greatly improving the conductivity of the indium-based oxide catalyst.

The invention discloses an anti-fouling curtain structure for water dredging engineering, and belongs to the technical field of environment protection of dredging engineering, the anti-fouling curtain structure for water dredging engineering comprises a floating body, an anti-fouling curtain and a vertical body, the floating body is arranged at the top end of the anti-fouling curtain, the vertical body is arranged at the bottom end of the anti-fouling curtain, and the anti-fouling curtain is geotechnical cloth; the geotechnical cloth is prepared from the following components in parts by weight: 100 to 150 parts of polyester, 20 to 50 parts of copolyester and 5 to 30 parts of inorganic filler, the copolyester is a copolymer of terephthalic acid, 5-sulfoisophthalic acid sodium salt, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole, and the geotechnical cloth is further prepared by a post-treatment step. According to the invention, the copolyester composed of terephthalic acid, sodium 5-sulfoisophthalic acid, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole and the inorganic filler are added into the polyester fiber, and the polyester fiber is modified through a post-treatment step, so that the alkali resistance and the antifouling property of the antifouling curtain are improved.

The invention relates to the technical field of cables, and provides a corrosion-resistant control cable and a preparation method thereof. The corrosion-resistant control cable sequentially comprises a conductor, an insulating layer, a shielding layer and a sheath layer from inside to outside, wherein the sheath layer comprises the following components in parts by weight: 50-70 parts of polyvinyl chloride, 15-25 parts of ethylene propylene diene monomer, 10-20 parts of modified graphene oxide, 0.5-1.5 parts of an antioxidant, 3-5 parts of a plasticizer, 15-20 parts of a flame retardant, 2-4 parts of a compatilizer, 4-5 parts of an active agent, 1-3 parts of an assistant crosslinking agent and 1-3 parts of a crosslinking agent; wherein the modified graphene oxide is obtained by modifying graphene oxide with dimethyl 5-hydroxyisophthalate and N-hydroxymethyl acrylamide. According to the technical scheme, the problem of insufficient corrosion resistance of the control cable in the prior art is solved.

The invention relates to a fluoro-ligand regulated metal organic framework material and a preparation method and application thereof, the fluoro-ligand regulated metal organic framework material is prepared and synthesized by using zirconium oxychloride as a metal node and trimesic acid / 5-fluoroisophthalic acid as an organic ligand through a reflux method; the unit structural formula of the fluorinated ligand metal organic framework material is [Zr6O4 (OH) 4 (BTC) 2-x (F-BTC) x (AA) y (H2O) z], according to the preparation method, trimesic acid and part of 5-fluoroisophthalic acid are co-coordinated, a C-F bond is introduced to regulate and control the electronic environment around a Zr node through deletion of a connecting site, uniform nucleation of crystals is promoted, the grain size of the obtained material is remarkably reduced, and the dispersity is higher.

This invention discloses an ultrafine polyethylene / polyester composite fiber and its preparation method, belonging to the field of composite fiber technology. It solves the problems of poor compatibility between the core and sheath layers, excessive fineness of PE / PET fibers, and difficulties in achieving ultrafine fiber production in existing technologies. The method involves preparing ultrafine polyethylene / polyester composite fibers using a core-sheath composite spinning process. The single filament fineness of the ultrafine polyethylene / polyester composite fiber is 0.6~0.8 dtex. The ultrafine polyethylene / polyester composite fiber has a core-sheath structure, with the sheath material being polyethylene and the core material being a blend of modified polyester and a compatibilizer. The modified polyester molecular chain consists of terephthalic acid segments, ethylene glycol segments, and isophthalic acid segments. The compatibilizer is a graft copolymer of polyethylene and poly(ethylene-co-glycidyl methacrylate)-g-polymethyl methacrylate. The preparation method of this invention is simple and easy to implement, with excellent core-sheath compatibility, which is beneficial for achieving ultrafine fiber production. The composite fiber exhibits excellent performance and can meet the demands of the high-end market.

The invention provides a sodium ion specific fluorescence labeled transparent soil sample as well as a preparation method and application thereof, and belongs to the technical field of rock soil and geological engineering. The method comprises the following steps: firstly, sequentially carrying out hydrophilization treatment, solvent evaporation and dissolution on a sodion combined benzofuran isophthalate probe to obtain a probe mother solution; mixing the probe mother solution, a buffer solution, an inorganic sodium salt solution and a solvent to prepare a fluorescence labeling pore solution; and finally, mixing the sodium polyacrylate particles and the fluorescence labeled pore liquid, and performing vacuum saturation treatment to obtain the transparent soil sample. The transparent soil sample provided by the invention still keeps excellent optical transparency while having sodium ion specific response capability, so that a stable and reliable experimental medium is provided for in-situ, real-time and full-field observation of sodium ion migration.

The invention discloses water-soluble nylon glue and a preparation method thereof, and relates to the technical field of water-soluble glue. The preparation method comprises the following steps: preparing a water-soluble polyamide solution from sodium 5-sulfoisophthalate, polyether amine, N-methyl pyrrolidone, pyridine, an antioxidant and an auxiliary agent, adding an inorganic filler, a film-forming agent, a wetting agent and a thickening agent into the water-soluble polyamide solution serving as a base material, and preparing the water-soluble nylon glue under the conditions of heating and high-speed dispersion. The adhesive has the characteristics of good water solubility, high bonding strength and environmental friendliness.

The invention discloses a preparation method of a self-cleaning antibacterial anti-mite fabric, and relates to the technical field of fabric preparation, and the preparation method comprises the following steps: 1-5 g of Cu (NO3) 2.6 H2O, 0.1-1.5 g of isophthalic acid, 20-50 mL of water and a certain antibacterial enzyme mixture are sequentially poured into a glass beaker, stirring is performed for 30 min, uniform mixing is performed, and the antibacterial anti-mite fabric is obtained; pouring the mixture into a 25mL polytetrafluoroethylene inner container, putting the inner container into a high-pressure kettle, sealing, carrying out high-temperature reaction for 72 hours in a drying oven at 90 DEG C, separating out a light blue product by using a centrifugal machine after the reaction is completed, washing for multiple times by using water, drying, mixing the obtained light blue powder with PET slices, melting and granulating, and drying to obtain the PET composite material. The preparation method comprises the following steps: preparing a bio-enzyme coated with a metal frame, mixing the bio-enzyme coated with the metal frame with common polyester chips, carrying out melt spinning to prepare multifunctional polyester fibers containing the bio-enzyme coated with the metal frame, taking the polyester fibers as weft yarns and cotton fibers as warp yarns, and interweaving into gray fabric according to a certain rule, so that the problem that the existing antibacterial anti-mite fabric is poor in effect durability is solved.

The application discloses application of 2-amino isophthalic acid (2-AIA) as a MALDI matrix in characterization of oligosaccharide additives in food. The skeleton structure of 2-AIA has a strong ultraviolet absorption group and a protonation site, which is beneficial to laser energy transmission and desorption ionization process of the measured object. Meanwhile, 2-AIA has multiple polar functional groups, which can effectively enhance the directional combination of the hydroxyl group of 2-AIA and oligosaccharide, and improve the anti-interference ability of impurities in a complex system. In addition, 2-AIA and a traditional organic matrix alpha-cyano-4-hydroxycinnamic acid (CHCA) are combined as a binary matrix (CHCA / 2-AIA), which can play a synergistic role of the double matrix, significantly improve the detection sensitivity of oligosaccharide. On the other hand, the combination of CHCA and 2-AIA with different pH values can significantly improve the uniformity of the co-crystallization, and improve the accuracy and reproducibility of quantitative detection.

The invention relates to a porous metal-organic network (MOF) comprising metal ions coordinated to an organic ligand, wherein at least 66% of the metal ions are iron(III) ions and the organic ligand is 5,5'-methylenediisophthalic acid, its preparation process, and its use for releasing a substance in a controlled manner. The present invention also relates to pharmaceutical compositions comprising such a metal-organic network.

This invention relates to the field of thermally conductive graphite materials technology, specifically disclosing a high thermal conductivity, high carbon residue aromatic heterocyclic polymer-based graphite film and its preparation method. The invention provides a high thermal conductivity, high carbon residue aromatic heterocyclic polymer-based graphite film, wherein the graphite film is prepared by first obtaining a dry base film using polyarylene oxadiazole as a polymer-based precursor, and then obtaining it through carbonization and graphitization treatments. The polyarylene oxadiazole is prepared by a segmented multi-step polymerization reaction using naphthalenedicarboxylic acid, hydrazine salt, terephthalic acid, and isophthalic acid as raw materials. The resulting graphite film exhibits significantly improved carbon residue and thermal conductivity compared to general organic precursors.

This polymer film 10 is characterized by comprising a first resin layer 11, a second resin layer 12, and a third resin layer, in that order. The polymer film is also characterized in that: the first resin film 11 forms one outermost layer of the polymer film 10; the first resin layer 11 includes a polyamide resin; the polyamide resin includes a copolymer polyamide that is a polycondensation product of diamine units and dicarboxylic acid units; the proportion of the number of aromatic diamine units to the total number of diamine units included in the polyamide resin that forms the first resin layer 11 is at least 75 mol%; the proportion of the number of isophthalic acid units to the total number of dicarboxylic acid units included in the polyamide resin that forms the first resin layer 11 is at least 22 mol%; the second resin layer 12 includes acid-denatured polypropylene; and the third resin layer 13 includes homopolypropylene.

The invention discloses a high-temperature-resistant liquid crystal polymer substrate for ultrathin flexible display, which belongs to the technical field of flexible display and comprises a modified liquid crystal polymer and a functional additive dispersed in the modified liquid crystal polymer. The modified liquid crystal polymer is prepared by polymerizing a monomer composition, and is specifically prepared from 38 to 42 parts of p-hydroxybenzoic acid, 28 to 30 parts of 4, 4 '-biphenol, 5.6 to 6.0 parts of terephthalic acid, 4.4 to 5.0 parts of 2, 6-naphthalic acid, 2.7 to 3.3 parts of isophthalic acid, 9 to 11 parts of 2, 2-bis (3, 5-difluoro-4-hydroxyphenyl) hexafluoropropane, 4.5 to 5.5 parts of N, N'-dihydroxypyromellitic diamine, 9 to 11 parts of 9, 9-bis [4-(4-methoxycarbonyl phenoxy) phenyl] fluorene and 1, 2-bis (4-(4-methoxycarbonyl phenoxy) phenyl] fluorene. The component A is prepared from 5.5 to 6.5 parts of 1, 4-cyclohexanedimethanol; the functional additive comprises an azobenzene derivative, a hot acid generator and a hydrogen bond enhancer; through the synergistic effect of a specific monomer combination, a functional additive and an optimization process, the technical bottleneck that heat resistance, transparency, dimensional stability and flexibility of an existing material are difficult to consider at the same time is broken through.

The invention discloses a fluorine-containing copolymer, a preparation method of the fluorine-containing copolymer, pre-coating liquid, a polyester optical film and a preparation method and application of the polyester optical film, and relates to the technical field of optical functional films. Comprising the following steps: reacting fluorine-containing aromatic dicarboxylic acid, dihydric alcohol and m-phthalic acid-5-sodium sulfonate for a first time under first pressure and first temperature to prepare a fluorine-containing copolymer precursor; reacting the fluorine-containing copolymer precursor for a second time under a second pressure and a second temperature to prepare a fluorine-containing copolymer; the first pressure is larger than the second pressure, and the first temperature is smaller than the second temperature. According to the fluorine-containing copolymer provided by the invention, the refractive index of the fluorine-containing copolymer can be remarkably reduced.

The invention provides a preparation method of a bio-based reversible cross-linked polyurethane hot melt adhesive. The method comprises the following steps: firstly, carrying out polymerization reaction on bio-based polyol PO3G (poly trimethylene ether glycol) and isophorone diisocyanate which are used as raw materials to prepare an isocyanate-terminated bio-based prepolymer; then, diethyl toluenediamine and isophthaloyl hydrazine are adopted as a mixed chain extender for a chain extension reaction, and after drying treatment, the bio-based polyurethane hot melt adhesive is obtained. The bio-based hot-melt adhesive prepared by the invention is suitable for hot-melt sealants in the field of electronic devices. The adhesive shows good bonding performance to a stainless steel base material, the tensile shear strength reaches 0.45-0.5 MPa, the adhesive has excellent reversible disassembly characteristic, and convenient separation of a bonding interface can be achieved by heating at 100 DEG C for 10 minutes.

The invention discloses a rapid hemostatic material, and belongs to the technical field of hemostatic materials, and the hemostatic material has low toxicity, low heat release and structural stability. The hemostatic material comprises a metal organic framework material or a mixture of a plurality of metal organic framework materials; the metal organic framework material is obtained by coordination of metal aluminum ions and organic ligands, and the organic ligands are selected from one or more of phthalic acid, isophthalic acid, trimesic acid, fumaric acid and other substances and derivatives thereof. Compared with a zeolite hemostatic material, the hemostatic material disclosed by the invention has the advantages of high hemostatic speed, mild hemostatic reaction and less heat release; compared with other metal organic framework hemostatic materials, the hemostatic material disclosed by the invention has the characteristics of high structural stability and high biocompatibility.

Provided is a heat-shrinkable polyester film that not only has a high heat shrinkage in the main shrinkage direction, but also has a good heat shrinkability of recycled PET resin even when recycled together with used beverage PET bottles. A heat-shrinkable polyester film containing, in 100 mol% of a dicarboxylic acid component, 95 mol% or more and 100 mol% or less of a dicarboxylic acid, 0 mol% or more and 5 mol% of isophthalic acid, and containing, in 100 mol% of all ester units, 85 mol% or more and 98 mol% or less of terephthalic acid ethylene glycol ester units, and containing, in 100 mol% of a polyol component, 2 mol% or more and 15 mol% or less of diethylene glycol, has a prescribed hot water heat shrinkage, and has a melting peak temperature, a crystallization exotherm, and a melting exotherm determined by melting the film after melting and quenching using a differential scanning calorimeter (DSC), and then re-warming, within prescribed ranges.

This application discloses a crystal, a rare-earth-doped crystal, its preparation method, and its applications, belonging to the field of crystal materials. The chemical formula of the crystal is [Gd(L)]. 1.5 (DMA)] n Formula I; in Formula I, L is a ligand formed by deprotonated benzene polycarboxylic acid; benzene polycarboxylic acid is selected from any one of terephthalic acid, phthalic acid, and isophthalic acid; DMA is N , N -Dimethylacetamide; n ∞ represents continuous repetition and infinite extension. The crystal is rare-earth doped, and the chemical formula of the rare-earth doped crystal is [Gd]. 1‑x% (L) 1.5 (DMA)] n :x% Ln 3+ Equation II; in Equation II, x = 0.1~10; Ln 3+ Selected from Tb 3+ Or Eu 3+ Any one of the following. It has potential application value in fields such as fluorescent materials, multicolor display materials, long afterglow materials, X-ray detection and imaging materials, radiation detection dosimeters, and optical information encryption. The preparation method used in this application can be easily achieved through solution reaction under relatively mild conditions, with low cost and strong industrial feasibility.

The invention relates to the technical field of polyester fiber processing, in particular to a quick-drying deodorizing antibacterial antistatic polyester fiber and a preparation method thereof. The invention discloses a modified PET (Polyethylene Terephthalate) composite material, which is prepared from the following raw materials in parts by weight: 100 parts of PET, 4 to 8 parts of functional master batch, 5 to 8 parts of epoxy functionalized styrene-acrylate oligomer, 10 to 20 parts of silane coupling agent modified montmorillonite, 5 to 8 parts of hydroxypropyl-beta-cyclodextrin loaded porous silicon dioxide microspheres, 1 to 2 parts of sulfoisophthalic acid metal salt and 2 to 4 parts of dispersing agent. The multifunctional master batch is prepared from the following raw materials in parts by weight: 65-75 parts of PET polyester chips, 8-12 parts of epoxy-terminated hyperbranched polyester, 3-5 parts of a sulfonate antistatic agent and 2-4 parts of an antibacterial agent, through the formula, balanced integration of moisture absorption, quick drying, lasting deodorization, efficient antibacterial and antistatic functions is realized, the function retention rate is improved after multiple times of washing, and the antibacterial property is improved. The defects of single function and poor durability of an after-treatment mode are overcome, and the development requirements of modern textiles on multi-functionalization and high quality are met.

The invention relates to the technical field of metal surface protection materials, in particular to a composite antirust agent with mildew-proof and antirust performance and a preparation method thereof.The preparation method comprises the following steps that S1, 5-nitroisophthalic acid and metal oxide are subjected to a heating reaction, and a reaction mixture containing 5-nitroisophthalic acid salt is generated; s2, carrying out separation and purification; s3, drying treatment is carried out, and dry powder is obtained; s4, premixing with a mildew inhibitor, a corrosion inhibitor, an antioxidant and a silane coupling agent to obtain uniform composite powder; and S5, mixing the composite powder, a surfactant and an organic solvent to obtain a composite antirust agent finished product. According to the invention, a composite system composed of 5-nitroisophthalic acid zinc and a plurality of functional auxiliary agents is constructed, so that synchronous mildew-proof and rust-proof protection on the metal surface in a high-humidity environment and an environment where microorganisms are easy to breed is realized, and the coating stability and the long-term protection reliability are remarkably improved.

Provided are a chemically recycled PET fiber that exhibits less degradation and has excellent strength and durability, and a rubber-fiber composite product such as a tire or the like in which said chemically recycled PET fiber is used.　This chemically recycled PET fiber is obtained by chemically recycling PET products and spinning the same. The chemically recycled PET fiber is characterized in that: the chemically recycled PET fiber has a weight average molecular weight of 21000-27000 and a polydispersity index (weight average molecular weight / number average molecular weight) of 1.8-2.3; and, in the chemically recycled PET fiber, the content of isophthalic acid (IPA), the terminal carboxyl group (CEG) concentration, and the diethylene glycol (DEG) content satisfy the formula 101.57-0.67×CEG concentration-4.24×IPA content-21.74×DEG content≥54.4.

To provide a heat-shrinkable polyester film roll that reduces the occurrence of defects such as wrinkles and vertical sink marks during the heat shrinkage process caused by fluctuations in the heat shrinkage rate within the film roll, even when containing recycled PET bottle materials. [Solution] A heat-shrinkable polyester film roll made of a polyester containing 5% to 50% by mass of recycled PET bottle material and an isophthalic acid component, characterized in that it satisfies the following requirements (1) to (3). (1) When film samples taken at 100m intervals along the longitudinal direction of the roll are immersed in 90°C hot water for 10 seconds, the average shrinkage rate in the main shrinkage direction is 40% or more, and the shrinkage rate for all samples is within ±3% of the average. (2) In film samples taken at 100m intervals along the length of the roll, the isophthalic acid content ratio of the polyester constituting the film is all within ±0.3 mol% of its average value in 100 mol% of the total acid components. (3) The thickness variation in the longitudinal direction of the roll must be 20% or less.

A layered double hydroxide (LDH) in a heterogeneous electrocatalytic sp 2 Application of C–H activation and CO2 carboxylation. The preparation method of a cobalt-iron molybdate intercalated hydrotalcite (CoFe-Mo LDH) catalyst is as follows: the CoFe-Mo LDH is prepared by a simple coprecipitation method. The CoFe-Mo LDH is used for a heterogeneous electrocatalytic sp 2 C–H activation and CO2 carboxylation. By changing the CoFe-Mo LDH intercalation of the CoFe-Mo LDH solvent environment, a series of mono-carboxylation and di-carboxylation products can be obtained, such as: in the case of benzene as a substrate and DMF as a solvent, a mono-carboxylation product benzoic acid is obtained; in the case of benzene as a substrate and MeCN as a solvent, a di-carboxylation product isophthalic acid is obtained. For the first time, the on-demand switching of the mono-carboxylation and di-carboxylation of phenyl substrates is realized, and this research not only provides a new heterogeneous electrocatalytic strategy to achieve the carbon neutralization target, but also successfully converts cheap and easily available chemicals into high-value and carbon chain growth carboxylic acids under mild conditions.

The invention relates to the technical field of multi-layer polyester functional films, in particular to an optical antistatic polyester multi-layer composite functional film and a preparation method thereof. The problem that in the prior art, the optical performance and the antistatic performance of a polyester multilayer composite functional film cannot be considered at the same time is solved. The preparation method comprises the following steps: by adopting a surface layer-middle layer-surface layer three-layer structure, by taking terephthalic acid and ethylene glycol as raw materials, adding 1, 4-cyclohexanedimethanol and isophthalic acid for copolymerization, so as to prepare a copolymerized polyester base material; wherein the surface layer consists of a copolymerized polyester base material and an antistatic functional master batch; the middle layer is composed of a copolymerized polyester base material, an ultraviolet-resistant functional master batch and a chain extension toughening agent, and the three layers of materials are subjected to co-extrusion, two-way stretching and heat setting processes to prepare the polyester multi-layer composite functional film; the optical performance and the antistatic performance are cooperatively optimized through the multi-layer function partition design, and the liquid crystal display panel can be applied to the high-end optical fields such as liquid crystal display, touch panels and photovoltaic backboards.

A powder coating composition comprising an acid functional polyester resin A formed by reacting one or more polyol constituents, wherein at least 90 mole % of the polyols constituents is neopentylglycol, with one or more poly acid constituents wherein at least 87 mole % of the poly acid constituents is isophthalic acid (IPA); wherein polyester resin A has an Acid Number (AN) of between 20 and 90 mg KOH / g; and a hydroxyl value of less than 50, preferably less than 15 mg KOH / g; a glycidyl functional acrylic resin B having a weight average molecular weight of between 2500 and 7000; a curing catalyst C capable of catalyzing the reaction between the polyester resin A and the acrylic resin B; and optionally β-hydroxyalkylamide D.