83 results about "Cyclohexanedimethanol" patented technology

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 provides a high-valued utilization method and device for residual liquid in a rectifying tower in the production process of 1, 4-cyclohexanedimethanol, and relates to the technical field of by-product purification, and the method comprises the following steps: adding residual liquid in a CHDM rectifying tower, a catalyst and methanol into a methanol alcoholysis tank for alcoholysis reaction; introducing the alcoholysis solution into a scraper evaporator for distillation separation, and conveying a product into a gas-liquid separation tank to obtain an alcoholysis concentrated solution; and introducing the alcoholysis concentrated solution into an alcoholysis solution recovery tower for vacuum rectification, and condensing to obtain a crude product CHDM. According to the method, a methanol alcoholysis process is innovatively adopted, the CHDM rectifying tower kettle residual liquid is efficiently converted into high-value products such as CHDM, MHMCC and DMCD, and the products can be directly recycled to an existing CHDM rectifying system; through a designed methanol and tower kettle residual liquid recycling system, efficient utilization of raw materials and emission reduction of wastes are realized; a high-efficiency catalyst is adopted, so that conversion can be realized under mild conditions; and the catalyst can be used together with a device, and can be directly connected to the existing CHDM rectification device without modifying the original device.

The present invention relates to the field of organic synthesis, and in particular to a system and method for polyester recycling co-producing bis(2-hydroxyethyl) terephthalate and 1,4-cyclohexanedimethanol. The system, in the direction of feed, sequentially comprises a polyester alcoholysis system, a solid filtration system, a solvent recovery system, and a diethyl terephthalate purification system, as well as a bis(2-hydroxyethyl) terephthalate preparation system and a 1,4-cyclohexanedimethanol preparation system, each connected to the diethyl terephthalate purification system. The present invention, by optimizing the process route for polyester recycling co-producing bis(2-hydroxyethyl) terephthalate and 1,4-cyclohexanedimethanol, first degrades a polyester into an intermediate product diethyl terephthalate, and then prepares bis(2-hydroxyethyl) terephthalate and 1,4-cyclohexanedimethanol from the diethyl terephthalate. In this way, two degradation products can be obtained simultaneously, especially addressing the current issue of the high production cost of 1,4-cyclohexanedimethanol, reducing the cost of polyester recycling, and making it more suitable for industrial application.

The invention provides polyester resin for a transparent powder coating with excellent adhesive force and leveling as well as a preparation method and application of the polyester resin, and belongs to the technical field of powder coatings. The polyester resin is mainly prepared by taking diethylenetriamine pentaacetic acid, triethyl chlorosilane, 1, 6-hexanediol, N, N-diisopropylethanolamine, 2, 2-dimethyl propanol, neopentyl glycol, 3, 3-tetramethylene glutaric anhydride, 1, 4-cyclohexanedimethanol and the like as raw materials through polymerization. The obtained polyester resin chain segment has many branched structures, the number of amino groups and ester groups in the branched structures is large, the softening point is low, the low-temperature melting fluidity is good, the transparency is high, the adhesive force with a base material is good, then high-functionality diethylenetriamine pentaacetic acid is adopted for carboxyl end capping, the terminal carboxyl functionality is high, the curing activity is high, and the curing effect is good. After being cured with E-12 epoxy resin at low temperature, a coating film is good in leveling property and high in transparency, and can be used in the fields of thermosensitive base materials which are not easy to adhere, such as thin glass materials and the like.

A process for producing 1,4-cyclohexanedimethanol by depolymerizing one or more recycled terephthalate-based polyesters or copolyesters via solvolysis with one or more glycols or alcohols and contacting the depolymerization product with an ester hydrogenolysis catalyst and hydrogen to produce a hydrogenolysis product and contacting the hydrogenolysis product with a hydrogenation catalyst and hydrogen to produce 1,4- cyclohexanedimethanol.

The invention relates to a method and a system for continuously producing 1, 4-cyclohexanedimethanol, and belongs to the technical field of preparation of 1, 4-cyclohexanedimethanol. The problems of high raw material price, expensive catalyst, low production efficiency, harsh reaction conditions and the like in the existing 1, 4-cyclohexanedimethanol production process are solved. The method comprises the following steps: chloridizing p-xylene to prepare p-xylylene dichloride, hydrolyzing the p-xylylene dichloride to prepare terephthalyl alcohol, and hydrogenating the terephthalyl alcohol to prepare the 1, 4-cyclohexanedimethanol. The method takes p-xylene as a raw material, and is high in production efficiency, good in product quality, green, environment-friendly and low in energy consumption.

A thermoplastic decorative building board comprises at least one core layer. The core layer is made of a thermoplastic binder and a mineral filler. The thermoplastic adhesive accounts for 25%-75%, the mineral filler accounts for 25%-75%, and the sum of all the components is 100%. The thermoplastic adhesive is polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol ester, and the thermoplastic adhesive is polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol ester. The coating is prepared from a polyolefin elastomer, thermoplastic polyurethane or a styrene-butadiene-styrene block copolymer, diol modified copolyester, a carbodiimide hydrolysis stabilizer, an ultraviolet stabilizer, an adhesion promoter, an epoxy functionalized chain extender, a fluoropolymer or polymethyl methacrylate and a functional mineral filler. According to the building board, PETG with the molecular weight of 40,000-60,000 g / mol is selected, and 20-35 wt% of mineral filler is added, so that the qualified bending modulus is achieved.

The invention belongs to the technical field of high polymer materials, and relates to a preparation method and application of an ultraviolet aging resistant polyether ester elastomer, the preparation method comprises the following steps: firstly, carrying out esterification reaction or ester exchange reaction on 1, 4-cyclohexanedimethanol and an oxalic acid compound to obtain hydroxyl-terminated oxalate; mixing the hydroxyl-terminated oxalate with an aromatic dibasic acid compound, aliphatic dihydric alcohol, polyether glycol, a catalyst and an antioxidant, and sequentially performing esterification reaction, pre-polycondensation reaction and final polycondensation reaction to obtain the ultraviolet aging resistant polyether ester elastomer. Wherein the oxalic acid compound is oxalic acid or ester of oxalic acid; the aromatic dibasic acid compound is aromatic dibasic acid or ester of the aromatic dibasic acid. Compared with the prior art, the preparation method disclosed by the invention has the characteristics of simple preparation process and good ultraviolet aging resistance, a sample is placed in an ultraviolet aging test box to be irradiated for 30 days, the optimal tensile strength reduction percentage is 38.9% which is lower than 48.5% of the tensile strength before hydroxyl-terminated oxalate copolymerization, and the ultraviolet aging resistance is obviously improved.

Provided is a thermoplastic polyester elastomer resin composition having excellent weather resistance. This thermoplastic polyester elastomer resin composition comprises a thermoplastic polyester elastomer and a light shielding agent and further comprises at least one selected from the group consisting of a UV absorber, a light stabilizer, and a thickener, wherein the thermoplastic polyester elastomer does not contain either or both of a structural unit derived from 1,4-cyclohexanedimethanol and a structural unit derived from a hydrogenated dimer diol. In a 50 μm thick single layer film of the thermoplastic polyester elastomer resin composition, the ratio of light transmittance at wavelengths of 380 nm and 600 nm (380 nm / 600 nm) is less than 0.80, and the light transmittance at 600 nm is 70% or less.

The present application relates to a kind of bracketless invisible orthodontic treatment materials, more particularly to a kind of bracketless invisible orthodontic treatment multilayer composite film and preparation method thereof.The multilayer composite film of the present application is formed by including first layer, second layer and third layer arranged from top to bottom hot pressing;First layer and third layer are thermoplastic polyurethane, and second layer is formed by polyurethane and polyethylene terephthalate glycol-1,4-cyclohexane dimethanol extrusion injection molding after blending.The present application improves the material of each layer of composite film to prepare a kind of bracketless invisible orthodontic treatment interlayer composite excellent multilayer composite film.The multilayer composite film prepared by the present application also has the advantages of high transparency, suitable correction force and low stress relaxation rate.

The invention relates to the technical field of high polymer materials, in particular to epoxy modified polyester resin, a preparation method thereof, an adhesive and a composite film. The preparation raw materials of the epoxy modified polyester resin comprise dibasic acid, dihydric alcohol, unsaturated monomers and modified monomers. The binary acid is selected from one or more of terephthalic acid, isophthalic acid, adipic acid, succinic acid, sebacic acid and 1, 4-cyclohexanedicarboxylic acid; the dihydric alcohol is selected from one or more of ethylene glycol, 1, 2-propylene glycol, neopentyl glycol and 1, 4-cyclohexanedimethanol; the unsaturated monomer is selected from one or more of maleic anhydride, itaconic acid and fumaric acid; the modified monomer is selected from glycidyl methacrylate; the number-average molecular weight of the epoxy modified polyester resin is 2500 to 4000; the number-average functionality of epoxy groups of the epoxy modified polyester resin is 3.5 to 4.5. The adhesive prepared from the epoxy modified polyester resin is resistant to high-temperature cooking and high in safety, has high bonding strength and flexibility, and is suitable for large-scale industrial production.

The application discloses a low-temperature curing thin coating powder paint and a preparation method thereof, and belongs to the field of paint preparation. The powder paint comprises preparation raw materials of resin, accelerant, curing agent, dispersant, benzoin, barium sulfate, leveling agent, gloss enhancer and pigment. The preparation raw materials of the resin comprise neopentyl glycol, ethylene glycol, 1,4-cyclohexane dimethanol, terephthalic acid, adipic acid, isophthalic acid, catalyst and antioxidant. The application effectively improves the branching degree and end carboxyl activity of the resin by optimizing the preparation raw materials and the preparation raw material ratio of the resin, reduces the curing temperature of the powder paint while ensuring the reaction activity of the resin, and also obtains excellent weather resistance and mechanical properties. The catalyst and antioxidant are added in the resin preparation stage, which helps to improve the storage stability, solves the problem of uneven dispersion of the powder paint as a whole, and helps to improve the gloss of the coating and the performance of the coating.

The application discloses a kind of carbon-nitrogen modified hydroxyapatite as carrier preparation and its application in 1,4-cyclohexane dimethyl alcohol preparation nickel-indium catalyst. The carbon-nitrogen layer modification strategy is applied to hydroxyapatite in the present application, which greatly improves the dispersion and particle size distribution of nickel-indium alloy nanoparticles on the surface of hydroxyapatite, further improves the catalyst activity. In addition, the present application introduces indium into the nickel-based catalyst to form nickel-indium alloy. Indium will transfer electrons to nickel, further enhancing the hydrogenation deoxidation ability of nickel to ester. The catalyst of the present application realizes the efficient conversion of PET and its derivatives to CHDM under relatively mild conditions, and CHDM can be obtained with excellent yield and selectivity.

The invention relates to an ultra-thin iodine polaroid, a preparation method and an ultra-thin circular polaroid, and the ultra-thin iodine polaroid comprises polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol and iodine and / or potassium iodide dispersed in the polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol in a dissolving manner. According to the invention, iodine and / or potassium iodide are / is dissolved and dispersed in polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol, and the ultrathin iodine polarizer is finally obtained through the steps of material mixing, distillation, extrusion, coating, curtain coating, one-way calendering, stretching and drying. On the first aspect, iodine and / or potassium iodide are dispersed more uniformly by adopting a dissolving and dispersing mode, so that the degree of polarization and the light transmittance of each part of the polaroid are guaranteed; on the second aspect, the polaroid does not need to be clamped and fixed by a cellulose triacetate film, so that the thickness of the polaroid can be further reduced; and thirdly, a retarder is compounded on the ultra-thin iodine polaroid, so that the purpose of manufacturing the ultra-thin circular polaroid is achieved.

The application provides a kind of catalyst and the preparation method of 1,4-cyclohexane dimethanol by one-step hydrogenation of dimethyl terephthalate, and the preparation of the catalyst comprises: carbon nanotubes are treated with acid, reacted with Sn salt and citric acid to obtain a carrier, Rh salt is mixed with NH4ReO4 to co-precipitate and react to obtain a metal nanocluster solution, which is added dropwise into the dispersion of the carrier, and then heat-treated to obtain the catalyst. The above-mentioned catalyst catalyzes the one-step hydrogenation of dimethyl terephthalate to prepare 1,4-cyclohexane dimethanol. The metal Re in the catalyst can have a synergistic effect with Rh, promoting the ring hydrogenation catalytic activity of Rh for DMT. During the preparation process, the CNTs modified by nitric acid produce hydrophilic surface functional groups -COOH, -OH and -COR, which improve the dispersion of the metal in the CNTs, the adsorption performance of the raw material dimethyl terephthalate, and the catalytic hydrogenation activity of the catalyst is significantly improved.

The invention relates to the technical field of PETG or PCTG copolyesters, and discloses a regeneration preparation method of a PETG or PCTG copolyester, which comprises the following steps: (1) in the presence of an antioxidant, carrying out a regeneration reaction on PETG or PCTG copolyesters, the preparation method comprises the following steps: carrying out esterification reaction on a mixture containing bis (2-hydroxyethyl) terephthalate, a bis (2-hydroxyethyl) terephthalate dimer and cyclohexanedimethanol terephthalate, terephthalic acid and cyclohexanedimethanol; and (2) sequentially carrying out first polycondensation and second polycondensation on the esterification reaction product in the presence of a stabilizer. According to the method, the regenerated PETG (or PCTG) copolyester product can be directly polymerized and prepared by utilizing the residual catalyst in the high-purity monomer obtained by chemical recovery under the condition of not adding the catalyst, so that the method is green and environment-friendly, the production cost is saved, and good economic benefits are achieved.

Adhesive compositions made from blends of copolyester compositions which comprise residues of terephthalic acid, 1,4-cyclohexanedimethanol (CHDM), ethylene glycol (EG), neopentyl glycol (NPG), and / or 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) residues, in certain compositional ranges having certain advantages and improved properties including recyclability.

The present disclosure relates to a method for purifying a 1,4-cyclohexanedimethanol (CHDM) composition, and more particularly, to a method for purifying CHDM that can efficiently remove water as a solvent with low energy and can separate high-purity CHDM.

A method includes depolymerizing post-consumer or post-industrial recycled polyethylene terephthalate (rPET) to form bis(2-hydroxyethyl) terephthalate (BHET), and reacting at least a portion of the BHET with a catalyst to form an alcohol. The alcohol includes cyclohexanedimethanol (CHDM) or 1,4-phenylenedimethanol (PDM). Further steps of the method include polymerizing the alcohol in the presence of additional BHET to form a polyester. The polyester may include poly(cyclohexylenedimethylene terephthalate (PCT), polyethylene terephthalate glycol (PETG) copolyester, polycyclohexylene dimethylene terephthalate glycol (PCTG) copolyester, polycyclohexylene dimethylene terephthalate acid (PCTA), or a monomer having repeating units with the structure (I), wherein n is an integer having a value of at least 20.

The application relates to an intrinsic anti-static polarizer protective film base film and a preparation method thereof, the preparation method comprising the following steps: synthesizing an ionic liquid dihydric alcohol first, then performing co-polycondensation on the ionic liquid dihydric alcohol, terephthalic acid, ethylene glycol and 1,4-cyclohexane dimethanol to obtain an antistatic master batch; taking nano silicon dioxide as a core, performing surface grafting on the core through a silane coupling agent and polyether amine in sequence, and performing a quaternary ammoniation reaction to obtain a hybrid functional filler; and drying, blending the PET master batch, the antistatic master batch and the functional filler, and performing a melting extrusion, bidirectional stretching and heat setting process to obtain the protective film base film. The ionic conductive structure is chemically bonded to the polymer main chain, and the functional filler with surface migration characteristics is supplemented, so that the obtained film has long-lasting and stable intrinsic antistatic performance, and simultaneously has good flame retardance, optical performance and mechanical strength, and the technical defects of the traditional surface coating method, such as poor durability and easy abrasion of the antistatic performance, are solved.

The invention relates to the technical field of chemical detection, in particular to a method for analyzing sample components containing one or more of 1, 4-cyclohexanedimethanol, dimethyl 1, 4-cyclohexanedicarboxylate and dimethyl terephthalate. The analysis method comprises the following steps: sample pretreatment: pretreating a sample to obtain a liquid without mechanical impurities as a sample to be detected; determining and analyzing a to-be-detected sample: injecting the to-be-detected sample into a gas chromatograph for detection, and determining the nature by using an external standard method; the detection conditions are as follows: the detector is FID, and the temperature of the FID is 295-320 DEG C. The analysis method disclosed by the invention is simple, good in reproducibility, high in sensitivity, good in stability, simple to operate and high in analysis speed, can meet the analysis requirements of 1, 4-cyclohexanedimethanol, raw materials thereof and raw material hydrogenation products or samples containing or partially containing similar components, and omits the tedious operation of selecting and adding internal standard substances.

Described are polyester compositions comprising at least one amorphous copolyester which comprises terephthalic acid, an ester thereof, or mixtures thereof, ethylene glycol, 1,4-cyclohexanedimethanol, and 2,2,4,4-tetramethyl-l,3-cyclobutanediol, having high glass transition temperature, specific flexural properties, and impact property. The polyester composition may be manufactured into articles such as fibers, films, containers, bottles, or sheets.

This invention relates to a polyester polyol modified with tricyclodecanediethanol, its preparation method, and its applications, belonging to the technical field of polyester polyols and polyurethane materials. The polyester polyol is prepared by esterification and polycondensation reactions of aliphatic diacids and diols. The diols include alicyclic diols, chain alkane diols, and functional diols; the alicyclic diol is a compound system of tricyclodecanediethanol and 1,4-cyclohexanediethanol, and the functional diol is a diol containing siloxane units or fluorine units. This invention, through a specific ratio of two alicyclic diols, balances material rigidity and flexibility, reduces melt viscosity, and improves processing fluidity; by in-situ copolymerizing trace amounts of functional diols, fluorine / silicone segments spontaneously accumulate to the surface, reducing surface energy and improving stain resistance and mold release properties. This polyester polyol and its downstream products maintain high light transmittance and high mechanical strength, achieving synergistic optimization of bulk and surface properties, and are suitable for high-end coatings, optical coatings, and other fields.

The invention discloses transparent degradable copolyester as well as a preparation method and application thereof. The copolyester is prepared from terephthalic acid or dimethyl terephthalate, 1, 4-cyclohexanedimethanol, 1, 4-butanediol and lactic acid as raw materials through melt polymerization, the structure of the copolyester contains a fragment as shown in a formula I, the unit sequence length x is selected from 1-20, the unit sequence length y is selected from 1-20, and the unit sequence length z is selected from 4-6. A polylactic acid fragment is introduced into a terephthalic acid-butanediol polyester chain segment to adjust the biodegradability of the copolyester, and a 1, 4-cyclohexanedimethanol rigid dihydric alcohol structure is utilized to adjust the crystallization behavior of the degradable copolyester, so that the material is endowed with good transparency and biodegradability. The copolyester provided by the invention is transparent, has good mechanical properties and heat resistance, and is degradable in a full natural domain.

This invention discloses a method for preparing a high-transparency copolyester and its application in sheet materials, belonging to the field of polymer materials technology. The high-transparency copolyester of this invention comprises an aromatic diacid component, an aliphatic diol component, a polyfunctional acid component, and a polyfunctional alcohol component. The aromatic diacid component comprises 70-96 mol% terephthalic acid residues and 4-30 mol% isophthalic acid residues; the aliphatic diol component comprises 60-98 mol% ethylene glycol residues, 0.2-3 mol% diethylene glycol residues, 0-18 mol% neopentyl glycol residues, and 0-25 mol% cyclohexanediol residues; the polyfunctional acid component accounts for 0.001-0.1 mol% of the aromatic diacid component, and the polyfunctional alcohol component accounts for 0.001-1 mol% of the aliphatic diol component. This invention utilizes the introduction of polyfunctional acid and alcohol units into the copolyester chain segments to form a branched structure, disrupting the molecular chain regularity, reducing crystallinity, and forming an amorphous polyester that allows light to pass through smoothly, resulting in high transparency.

The present application relates to a polyester copolymer having excellent strength and a product comprising the same. The polyester copolymer comprises residues of a dicarboxylic acid component comprising terephthalic acid and residues of a diol component comprising isosorbide, cyclohexanedimethanol, and a non-cyclic diol; the contents of the isosorbide residues, the cyclohexanedimethanol residues and the non-cyclic diol residues are 4 mol% to 20 mol%, 65 mol% to 85 mol% and 11 mol% to 31 mol% based on the total mole number of the diol component residues; the polyester copolymer satisfies the formula: 30 lt; (X * Y) / (Z * W) lt; x is the storage modulus (MPa) of the polyester copolymer at 40 DEG C, Y is the glass transition temperature (DEG C) of the polyester copolymer, Z is the melting point (DEG C) of the polyester copolymer, and W is the heat of fusion (J / g) of the polyester copolymer.

The invention discloses a waterproof anti-aging carrier tape material and a preparation method thereof, and relates to the technical field of polycarbonate. The preparation method specifically comprises the following steps: blending polycarbonate, acrylonitrile-butadiene-styrene resin, methyl methacrylate-butadiene-styrene resin, modified titanium dioxide and an auxiliary agent, and carrying out melt extrusion granulation to obtain the waterproof anti-aging carrier tape material, the polycarbonate comprises silicon-containing isosorbide polycarbonate, and is prepared by adding a silicon-based modifier into a melt transesterification-polycondensation method system for copolymerization of diphenyl carbonate, isosorbide and 1, 4-cyclohexanedimethanol. According to the invention, polycarbonate prepared by introducing a silicon-based modifier into an isosorbide polycarbonate melt transesterification-polycondensation method system is used as a matrix, and modified titanium dioxide is added, so that the waterproof and anti-aging properties of the carrier tape material are remarkably improved, and meanwhile, the carrier tape material has excellent mechanical properties and antistatic property.

The present invention relates to the field of organic synthesis, and in particular to a system and method for preparing 1,4-cyclohexanedimethanol from recycled polyester. The system sequentially comprises, in a feed direction, a polyester alcoholysis system, an alcoholysis solution impurity removal system, a solvent recovery system, a diethyl terephthalate purification system, and a 1,4-cyclohexanedimethanol preparation system. In the present invention, by optimizing the process route for preparing 1,4-cyclohexanedimethanol from recycled polyester, the polyester is first degraded to an intermediate product diethyl terephthalate, and then 1,4-cyclohexanedimethanol is prepared from the diethyl terephthalate. In this way, the problem of waste polyester recycling is solved, and 1,4-cyclohexanedimethanol having high economic value is prepared at a low cost, and the problems of high preparation cost and high preparation difficulty of 1,4-cyclohexanedimethanol are solved, so that the present invention is more suitable for industrial application.

The invention provides a novel self-emulsifying nonionic water-dispersed saturated polyester dispersoid and a preparation method and application thereof, the novel self-emulsifying nonionic water-dispersed saturated polyester dispersoid comprises polyester and a water-containing solvent, and the polyester is obtained by esterifying first polyhydric alcohol, second polyhydric alcohol and polybasic acid; the first polyhydric alcohol comprises one or more of neopentyl glycol, trimethylolpropane, hexanediol, 1, 4-cyclohexanedimethanol (CHDM) and ethyl butyl propylene glycol (BEPD), and the second polyhydric alcohol comprises one or more of neopentyl glycol, trimethylolpropane, hexanediol, 1, 4-cyclohexanedimethanol (CHDM) and ethyl butyl propylene glycol (BEPD); the second polyhydric alcohol comprises polyethylene glycol; the weight part of the first polyhydric alcohol is 16 to 23 parts, the weight part of the second polyhydric alcohol is 2 to 10 parts, and the weight part of the binary acid is 28 to 35 parts. The water-dispersible saturated polyester dispersion provided by the invention has excellent storage stability, excellent water resistance and boiling water resistance, good compatibility and flexibility and low-foam property.