37 results about "Diethyl terephthalate" patented technology

The invention discloses an antibacterial anti-aging refrigerator door sealing strip and a preparation method thereof. The antibacterial anti-aging refrigerator door sealing strip is prepared from a soft polyvinyl chloride jacket and a magnetic rubber strip, wherein the soft polyvinyl chloride jacket is prepared from the following raw materials: polyvinyl fluoride, acrylonitrile-butadiene-styrene copolymer, 24-28 parts of polyurethane resin, epoxy resin, glass fiber, glass cotton, ceramic fiber, calcium carbonate, graphite, polydiethyl terephthalate, a light stabilizer, an inorganic antibacterial agent, a plasticizer and an antioxidant; the magnetic rubber strip is prepared from the following raw materials: rubber, magnetic powder, calcium carbonate and graphite. The preparation method comprises the following steps: (S1) preparing the soft polyvinyl chloride jacket; (S2) preparing the magnetic rubber strip; (S3) tucking the magnetic rubber strip in the soft polyvinyl chloride jacket, and welding at an opening to obtain a primary finished product; (S4) soaking the primary finished product in antibacterial liquid for 48-56 h, and drying to obtain the antibacterial anti-aging refrigerator door sealing strip. According to the antibacterial anti-aging refrigerator door sealing strip and the preparation method thereof disclosed by the invention, the preparation process is simple and practical, the antibacterial anti-aging refrigerator door sealing strip is suitable for large-range popularization and application, and the raw materials are widely available.

The invention belongs to the technical field of powder coatings, particularly relates to an epoxidation polyester resin and further discloses a preparation method of the epoxidation polyester resin and application of the prepared powder material. The epoxidation polyester resin is prepared by copolymerizing the raw materials of diethyl terephthalate, glutamic acid, mercaptosuccinic acid, 12-hydroxy stearic acid, dyhydroxyl-1-ethyl benzene, 2,5-dimethyl-2,5-hexanediol, neopentyl glycol, resorcinol diglycidyl ether and the like, the acid value of the finally obtained polyester resin is lower than 2 mgKOH / g, the epoxide equivalent is 800-900 g / mol, the softening point is 85-105 DEG C, the polyester resin can substitute E-12 epoxy resin and the commercially available high-acid-value carboxyl polyester (the acid value is 48-52 mgKOH / g) to cure, a coating film completely reaches the requirement of the powder coating, and the prepared powder coating is better in stability and boiling resistance.

The invention relates to a method for preparing modified PEF copolyester by using 2, 3-diphenyl-diethyl terephthalate, which is used for preparing the PEF copolyester by using dimethyl acetone dicarboxylate and cinnamyl aldehyde as raw materials and zinc acetate and antimonous oxide as catalysts under the conditions of high temperature and high vacuum, and comprises the following steps: 1) preparing the 2, 3-diphenyl-diethyl terephthalate from the diethyl acetone dicarboxylate; and 2) preparing the modified PEF copolyester from the 2, 3-diphenyl-diethyl terephthalate. The preparation method has the advantages that the PEF polyester is wide in raw material source, low in price, renewable and low in production cost; the PEF polyester modification synthesis process is simple, easy to operate,environmentally friendly, high in yield and beneficial to industrial production; the prepared modified PEF copolyester material is good in thermal stability and adjustable in performance, structure and function diversification is easy to achieve, the performance of the modified PEF copolyester material can be comparable with that of polyester based on petroleum raw materials, and the modified PEFcopolyester material has the possibility of large-scale production.

The invention discloses a method for degrading polyethylene terephathalate. The method mainly includes the following steps: 1, strain culture: comamonas testoseroni strain is cultured for 12-18h in a solid medium with inclined surface at 30-37 DEG C; 2, substrate solution preparation: 5-9 parts of substrate solution with the concentration of 1-5g / L are prepared, each part is 50ml and is respectively placed into a 150ml conical flask, and packing up and sterilizing for 25min are carried out at 121 DEG C; 3, substrate degradation: the strain in the step 1 is inoculated into the substrate solution in the step 2, so as to obtain degradation liquor, and shake culture is carried out at the rotating speed of 200r / min and at the temperature of 30-37 DEG C, so as to catalyze degradation on the substrate; 4, substrate degradation ratio detection: 400-190nm wavelength scanning is adopted, and variation of substrate content is judged according to absorption peak at 240nm; 5, substrate degradationproduct detection: 400-190nm wavelength scanning is adopted, and variation of degradation intermediate product content is judged.

The invention discloses a preparation method of a ceramic coloration toner for a color laser printer, which relates to the ceramic coloration field. The method comprises pre-mixing diethyl terephthalate 25 parts, zirconia 70 parts, cadmium yellow 70 parts, manganese red 70 parts, cobalt ultramarine 70 parts, salicylic acid charge control agent 2 parts and polyethylene wax 2 parts according to weight percentage, and taking silica 1 part for use; extruding by using a double-screw extrusion machine, and performing coarse crushing and fine crushing on the extrudate; grading toner particles to control particle size D50 of the toner at 8.5+ / -0.5mum; and adding silica 1 part into the graded toner particles, mixing, and sieving by using a 120 mesh vibrating screen to obtain undersized product which is the ceramic coloration toner for the color laser printer. The method simplifies the process, lowers the cost, is convenient, and saves time and energy.

The invention relates to an improved resin of polyethylene glycol terephthalate with antistatic property, and the resin is prepared by ethylene glycol terephthalate and polyester ether which containsnanometer antimony and is doped with stannic oxide in the temperature between 260 DEG C to 280 DEG C, and in the vacuum between 20 Pa-100Pa, wherein, the polyester ether which contains nanometer antimony and is doped with stannic oxide is prepared by the mixture which is composed of ethylene glycol terephthalate and polyether and nanometer antimony which are doped with stannic oxide, and the massresistivity of the improved resin of the polyethylene glycol terephthalate which is got is 1*107 ohms.cm-9*109 ohms. cm. The invention solves the permanence problem of anti-static function of polyester.

The invention relates to a porous soft superfine polyester fiber and a preparation method thereof. The method comprises the following steps: spinning modified polyester by adopting a porous spinneret, so as to obtain the porous soft superfine polyester fiber. The spinneret orifices on the porous spinneret are arranged in an elliptical shape, namely the centers of the spinneret orifices are positioned on concentric ellipses, the concentric ellipses are a series of ellipses, and both long axes and short axes of all the ellipses are collinear. The porous soft superfine polyester fiber is prepared by performing metering, squeezing, cooling, oiling and high-speed winding on modified polyester chips, and the preparation method of the modified polyester comprises the steps: carrying a reaction between terephthalic acid and ethylene glycol to prepare polyethylene terephthalate, adding diethyl terephthalate obtained after the reaction between terephthalic acid and a dihydric alcohol containing branched chains, and continuously carrying out the reaction, so as to obtain the modified polyester. The fiber disclosed by the invention is excellent in performance, the linear density deviation rate is less than or equal to 0.5%, the breaking strength CV value is less than or equal to 4.0%, the breaking elongation CV value is less than or equal to 8.0%, and the yarn unevenness CV value is less than or equal to 2.0%.