147 results about "Cyclohexanedimethanol" patented technology

The invention relates to the technical field of multi-layer copolyester films, and discloses a high-temperature-resistant antistatic multi-layer copolyester film and a preparation method and application thereof, and the multi-layer copolyester film comprises an ABA three-layer structure obtained through melt co-extrusion; the layer A is prepared from the following raw materials in percentage by mass: 5 to 30 percent of anti-blocking agent master batch and the balance of modified copolyester; the raw material of the layer B is modified copolyester; the modified copolyester is prepared from a binary acid mixture, a dihydric alcohol mixture and a catalyst through an esterification reaction and a condensation polymerization reaction; the binary acid mixture comprises furandicarboxylic acid and 2, 2 '-bifuran-5, 5'-dicarboxylic acid, and the dihydric alcohol mixture comprises ethylene glycol, 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol and 1, 4-cyclohexanedimethanol. According to the invention, the modified copolyester is used as a main raw material, and the film is endowed with good temperature resistance in a copolymerization modification manner, and has stable and lasting antistatic performance.

The invention discloses a crystallinity low-melting-point polyester fiber and a preparation method thereof, and relates to the technical field of polyester fibers, the crystallinity low-melting-point polyester fiber is composed of a skin layer and a core layer, and a skin-core integrated crystallization design is adopted; the skin layer is modified copolyester, and the core layer is modified PET; the modified copolyester is prepared from the following raw materials in parts by weight: 38 to 42 parts of terephthalic acid, 12 to 15 parts of 2, 5-furandicarboxylic acid, 28 to 32 parts of 1, 4-cyclohexanedimethanol, 8 to 10 parts of polycaprolactone, 1.0 to 1.5 parts of a crystallization coordinating agent, 0.5 to 1.0 part of an antioxidant and 0.3 to 0.5 part of a hindered amine light stabilizer. The crystallization coordinating agent is prepared by compounding hydroxylated graphene and maleic anhydride grafted polyolefin elastomer according to a mass ratio of (2 to 3): 1. The fiber is good in high temperature resistance and durability, low in melting point, good in size stability and long in service life.

The invention discloses a deep embossing polyester facing film, a preparation method thereof and a polyester film facing plate. The polyester facing film is prepared from the following raw materials in percentage by weight: 10 to 20 percent of flame-retardant polyester and the balance of poly (1, 4-cyclohexanedimethanol terephthalate); the flame-retardant polyester is prepared by condensation polymerization of a first esterification product and a second esterification product in a mass ratio of (60-70): (20-30), the raw materials of the first esterification product comprise terephthalic acid and 1, 4-cyclohexanedimethanol in a molar ratio of 1: (1.05-1.3), and the raw materials of the second esterification product comprise a benzoxazine phosphate monomer and dihydric alcohol in a molar ratio of 1: (1.1-1.3). The benzoxazine phosphate chain segment is introduced into the PCT, so that the flame retardant property of the polyester facing film is remarkably improved on the basis of not keeping the mechanical property and the processability of the polyester material.

The present invention relates to the field of coating preparation. Disclosed are a low-temperature curing thin-coat powder coating and a preparation method therefor. The powder coating comprises a resin, an accelerant, a curing agent, a dispersing agent, benzoin, barium sulfate, a leveling agent, a brightening agent, and a pigment as preparation raw materials, and the preparation raw materials of the resin comprise neopentyl glycol, ethylene glycol, 1,4-cyclohexanedimethanol, terephthalic acid, adipic acid, isophthalic acid, a catalyst, and an antioxidant. In the present application, by optimizing the preparation raw materials of the resin and the preparation raw material proportion, the branching degree and the terminal carboxyl activity of the resin are effectively improved, the reaction activity of the resin is ensured, the curing temperature of the powder coating is reduced, and excellent weather resistance and mechanical properties can also be obtained; moreover, the catalyst and the antioxidant are added in the resin preparation stage, thereby facilitating improvement of the storage stability, solving, taken as a whole, the problem of non-uniform dispersion of powder coatings, and facilitating improvement of the glossiness of the coating and the performance of the coating.

The present invention provides a polyester wherein: a dicarboxylic acid constituent unit includes 72.5 mol% or more of a constituent unit derived from 2,6-naphthalenedicarboxylic acid and / or an ester derivative thereof among a total 100 mol% of said dicarboxylic acid constituent units; and a diol constituent unit includes 27.5 mol% or more of a constituent unit derived from 1,4-cyclohexanedimethanol and a constituent unit derived from 2,2,4,4-tetramethyl-1,3-cyclobutanediol among a total 100 mol% of said diol constituent units. A feeding bottle according to the present invention is formed using said polyester.

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 composite material and a preparation method thereof, and relates to the technical field of building materials. The preparation method comprises the following steps: providing a first mixed solution and 1, 3-cyclohexanedimethanol, mixing, and carrying out a first reaction to obtain a first prepolymer solution; providing a second mixed solution and polytetramethylene ether glycol, mixing, and carrying out a second reaction to obtain a second prepolymer solution; the first mixed solution and the second mixed solution both comprise diphenylmethane diisocyanate; providing a third mixed solution, mixing the third mixed solution with the first prepolymer solution and the second prepolymer solution, and carrying out a third reaction to obtain a supramolecular polymer; the third mixed solution comprises a chain extender; providing a wear-resistant agent, an antioxidant and glass fibers, and mixing with the supramolecular polymer to obtain the composite material. The composite material obtained by the method provided by the invention has high strength, excellent impact toughness, high wear resistance and self-repairing capability, and has wide prospects in high-end application scenarios such as polyurethane doors and windows, curtain wall keels, photovoltaic brackets and the like.

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 discloses polyester resin for a weather-resistant powder coating and a preparation method of the polyester resin, and belongs to the technical field of resin preparation. The polyester resin is prepared from polyhydric alcohol, polyatomic acid, a catalyst, an auxiliary agent and modified montmorillonite, wherein the modified montmorillonite is a nano material which is subjected to surface coupling modification by a hydroxyl-terminated cationic waterborne polyurethane intercalation and gamma-aminopropyltriethoxysilane. By optimizing monomers, such as isophthalic acid and 1, 4-cyclohexanedimethanol, and combining a labyrinth barrier structure formed by modified montmorillonite in the resin, the weather resistance and hydrolysis resistance of the material are effectively improved. After the resin is applied to the powder coating, corrosion of water and acidic substances to ester bonds can be remarkably reduced in severe environments such as acid rain, and the service life of the coating is prolonged.

The invention provides a synthetic method of PETG (polyethylene terephthalate glycol), which comprises the following steps: ester exchange: carrying out ester exchange on bis (2-hydroxyethyl) terephthalate and 1, 4-cyclohexanedimethanol under the catalysis of an ester exchange catalyst to obtain an ester exchange product; pre-polycondensation: constructing a reaction system by using the bis (2-hydroxyethyl) terephthalate, the ester exchange product obtained in the ester exchange step, a polymerization catalyst and a stabilizer, heating the reaction system to 270-273 DEG C, reducing the pressure to be less than or equal to 10kPa, and carrying out pre-polycondensation; medium polycondensation: after the pre-polycondensation is completed, heating the reaction system to 273-275 DEG C, continuously reducing the pressure to be less than or equal to 1kPa, and continuously performing polycondensation; and final polycondensation: after the intermediate polycondensation is completed, heating the reaction system to 280-283DEG C, reducing the pressure to be less than or equal to 100Pa, and carrying out final polycondensation to obtain the PETG. BHET and ester exchange products are subjected to condensation polymerization in a multi-stage vacuum and stepped heating mode, small molecule by-products are effectively removed in the condensation polymerization process, and the polymerization degree is promoted to be improved.

The present application relates to an ABS composition and its preparation method and application, belong to the composition technical field of high molecular compound, the ABS composition of the present application includes the following weight parts of components: ABS resin 53~73 parts, PETG copolyester 15~30 parts, bromine flame retardant 11~13 parts, antimony flame retardant 1~3 parts, the weight percentage of butadiene in the ABS resin is greater than or equal to 20%, the weight percentage of 1,4-cyclohexane dimethanol in the PETG copolyester is 10%~30%, and the melt mass flow rate of the PETG copolyester under the condition of 220 DEG C, 10 kg is greater than or equal to 18 g / 10 min according to ISO 1133-1:2011 standard, the ABS composition not only has good flame retardant performance, but also has excellent marking effect and mechanical properties.

The present invention provides a polyester wherein: a dicarboxylic acid constituent unit is a constituent unit derived from 2,6-naphthalenedicarboxylic acid and / or an ester derivative thereof; and a diol constituent unit includes a constituent unit derived from any isosorbide, and 27.5 mol% or more of a constituent unit derived from 1,4-cyclohexanedimethanol among a total 100 mol% of said diol constituent units. A feeding bottle according to the present invention is formed using said polyester.

The purpose of the present invention is to provide a polyester-based heat-shrinkable film which is suitable for heat-shrinkable label applications and which is less apt to become loose after having been applied as labels and does not become distorted when applied as labels. This polyester-based heat-shrinkable film has ethylene terephthalate units, and the polyester resin components include the following amorphous components: 8-20 mol% of 1,4-cyclohexanedimethanol-derived constituent unit included in 100 mol% of the diol components; and an adipic-acid-derived constituent unit and an isophthalic-acid-derived constituent unit included in 100 mol% of the dicarboxylic acid components in such amounts that the molar ratio of the content of each of the constituent units to the content in mol% of the 1,4-cyclohexanedimethanol-derived constituent unit is 0.1-0.5. The polyester-based heat-shrinkable film has a hot-water shrinkage and a shrinkage stress which satisfy given ranges.

Provided are polymer compositions comprising copolyesters comprising 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD) and cyclohexanedimethanol (CHDM) residues which exhibit substantially improved impact toughness and coefficient of friction reduction while physical properties such as heat distortion temperature (HDT) and flexural modulus, after modification, are maintained compared to un-modified compositions.

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.

The application provides a copper-based ester hydrogenation catalyst and a preparation method and application thereof, and a preparation method of 1,4-cyclohexanedimethanol, and belongs to the field of catalytic chemistry. The method comprises the following steps: mixing a soluble copper salt, a metal additive soluble salt, an alkaline substance and water to carry out a precipitation reaction to obtain a hydroxide precipitate; mixing the hydroxide precipitate with a pore expanding agent and then maintaining to obtain a mixture; and sequentially carrying out water washing, drying and calcination on the mixture to obtain the copper-based ester hydrogenation catalyst. The copper-based ester hydrogenation catalyst with high pore diameter and high specific surface area is prepared by mixing the pore expanding agent with the alkaline substance to expand the pores, and the catalyst is particularly suitable for preparing CHDM by hydrogenating 1,4-cyclohexanedimethyl acid dimethyl ester, and CHDM with a trans ratio of more than 75% can be obtained at a lower temperature.

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.

This application relates to the field of protective films, disclosing a fingerprint-resistant and nail-print-resistant protective film and its preparation method. The fingerprint-resistant and nail-print-resistant protective film comprises, from top to bottom, a nano-anti-fingerprint coating, a self-healing coating, an elastic polyurethane film layer, and an adhesive layer, sequentially bonded together. The nano-anti-fingerprint coating is a nano-fluorine-containing coating, the self-healing coating is a self-healing polyurethane coating, and the adhesive layer is obtained by curing an adhesive. The adhesive is made from the following raw materials in parts by weight: 60-80 parts acrylic resin, 10-20 parts hydroxyacrylate monomer, 5-8 parts dipentaerythritol hexaacrylate, 3-5 parts cyclohexanediol-1,4-diacrylate, 2-6 parts methyl methacrylate, 1-5 parts isobornyl acrylate, 3-6 parts photoinitiator, and 1-3 parts antioxidant. The resulting protective film exhibits good fingerprint and nail-print resistance while also possessing high clarity and adhesion stability, and is not prone to edge lifting.

The invention relates to a biodegradable hollow plate master batch and a preparation process thereof. The biodegradable hollow plate master batch is prepared from the following raw materials in parts by weight: 30-50 parts of a first monomer; 5-30 parts of a second monomer; 3-20 parts of a third monomer; 2 to 12 parts of biomass filler; the first monomer is one of a cyclohexane dibasic alcohol compound, a polyester copolymer, organic acid esters, aromatic polyester and the like, and the second monomer is one of a dicarboxylic acid compound, succinic acid and the like; the dicarboxylic acid compound comprises adipic acid and pimelic acid. According to the invention, a first monomer is a cyclohexanediyl alcohol compound, the cyclohexanediyl alcohol compound is 1, 4-cyclohexanedimethanol, and a second monomer is succinic acid; the third monomer is polyethylene glycol terephthalate and has the characteristics of transparency, toughness, chemical corrosion resistance and the like, the mechanical property, the degradation property and the environmental friendliness of the material are practically balanced, and a material-level solution is provided for sustainable development.

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.

The present invention provides a recombinant bacterium for producing 1,4-cyclohexanedimethylamine and a method for producing 1,4-cyclohexanedimethylamine by a multi-enzyme cascade. The recombinant bacterium for producing 1,4-cyclohexanedimethylamine co-expresses an alcohol dehydrogenase mutant shown in SEQ ID NO.4, a transaminase mutant shown in SEQ ID NO.5, and a glutamate dehydrogenase shown by the amino acid sequence shown in SEQ ID NO.3; it can be used to catalyze the production of 1,4-cyclohexanedimethylamine, significantly improving the yield and conversion rate of 1,4-cyclohexanedimethylamine. The present invention also provides a method for catalytically producing 1,4-cyclohexanedimethylamine using the recombinant strain. The production method has the advantages of cheap and readily available raw materials, mild reaction conditions, avoidance of accumulation of toxic aldehyde intermediates, and high yield. The recombinant strain obtained by the present invention produces 1,4-cyclohexanedimethylamine at a yield of up to 16.3 g·L using 1,4-cyclohexanedimethanol as a substrate. ‑1 , with a conversion rate of 82.6%. This method can achieve green production of 1,4-cyclohexanedimethylamine and has great application prospects.

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 invention relates to a polyester resin, and to an article prepared from the polyester resin, the polyester resin comprising a diol repeating unit derived from a diol component; and a dicarboxylic acid repeating unit derived from a dicarboxylic acid component, in which when the value of tan [delta] is measured by dynamic mechanical analysis (DMA), the temperature at the maximum value (tan [delta] peak) of tan [delta] is 100 DEG C or higher, and the content and composition of 1, 4-cyclohexanedimethanol contained in the diol component are controlled.

To provide a sheet for forming a container, which has excellent cold resistance and can reduce an environmental load, and to provide a food container and a food container constituent member.SOLUTION: A container-forming sheet 10-1 has a laminated structure formed by laminating at least an outer layer 11, an intermediate layer 12, and an inner layer 13. The intermediate layer contains recycled polyethylene terephthalate, and isophthalic acid. The outer layer and the inner layer contain cyclohexanedimethanol and / or isophthalic acid. The total mass of the outer layer and the inner layer is 2 mass% or more and 80 mass% or less with respect to the whole sheet.SELECTED DRAWING: Figure 1

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.

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.