37 results about "Diethyl terephthalate" patented technology

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 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 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%.