Synthesis of p-phenyl unsaturated polyester resin by using waste polyester material

A polyester resin and unsaturated technology, which is applied in the field of synthesizing p-phenylene unsaturated polyester resin, can solve problems such as poor solubility, achieve good heat resistance, reduce product cost, and reduce environmental pollution

Inactive Publication Date: 2005-06-29
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a method for synthesizing p-phenylene UPR with various recycled polyester wastes, so as to reduce production costs, improve product quality, and overcome the disadvantage of poor solubility of unsaturated linear polyesters in styrene

Method used

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  • Synthesis of p-phenyl unsaturated polyester resin by using waste polyester material
  • Synthesis of p-phenyl unsaturated polyester resin by using waste polyester material
  • Synthesis of p-phenyl unsaturated polyester resin by using waste polyester material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]In a four-neck flask with a thermometer, a stirrer, a nitrogen inlet tube and a fractionation device, 152 g of propylene glycol, 53 g of diethylene glycol, 96 g of PET polyester bottle fragments (about 5 mm in particle size), and 0.5 g of catalyst were successively added. g. The temperature is gradually raised to 190-200°C under the condition of feeding nitrogen, and the temperature of the fractionation column is lower than 105°C. Keep this temperature until all the polyester waste particles disappear. When the reaction system becomes gradually uniform and transparent, it is the end point of alcoholysis. Lower the temperature of the material to below 160°C and add 222g of maleic anhydride, gradually raise the temperature to 190-210°C, keep the temperature of the fractionation column lower than 105°C until the acid value reaches 80mgKOH / g, reduce the temperature of the material to 110-140°C and add 0.2g of phosphoric acid catalyst, slowly add 30g of dicyclopentadiene (DCP...

Embodiment 2

[0046] With 62g ethylene glycol, 76g propylene glycol, 53g diethylene glycol, 8g cyclohexanol, 96g oil-free polyester waste silk, 0.3g esterification catalyst manganese acetate drops in the four-necked flask shown in embodiment 1, subsequent steps In embodiment 1, maleic anhydride is changed into fumaric acid 262g, phosphoric acid is changed into 0.15g, dicyclopentadiene (DCPD) is changed into 25g, carries out by the same operating procedure as embodiment 1.

Embodiment 3

[0048] The 1500L reactor is equipped with a stirrer, a temperature display, a fractionating column and a feeding port. First, 228kg of propylene glycol and 79.5kg of diethylene glycol are pumped into the reactor. Heat the liquid components to about 100°C, start the mixer to feed nitrogen, add 144kg of PET polyester bottle fragments (particle size is about 5mm), and 2kg of stannous octoate as the esterification catalyst, close the feeding port after the feeding, continue to stir and heat up . When the still temperature rises to 170°C, there will be distillate, control the fractionation column temperature to be lower than 105°C, and record the reaction temperature and distillation head temperature every half hour during the reaction. Continue to raise the temperature to 190-200°C, and keep this temperature until all the polyester waste particles disappear. After 5-6 hours, when the reaction system becomes gradually uniform and transparent, it is the end point of alcoholysis. Af...

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Abstract

The invention relates to a method for synthesizing unsaturated phenolic resin with various etherification waste, which includes the four steps: (1) etherification waste and polyhydric alcohol have alcohol sis and ester interchange with catalyst existing; (2)alcohol zed product and unsaturated binary acid or have etherification polycondensation; (3) use dicyclopentadiene (DCPD) to blocking modify in the later period of etherification polycondensation; (4) add into styrene solution for cross linking. The invention has plentiful sources of raw material, low price, decreased pollution and productive cost and energy saving, as well as eliminates the disadvantage of bad dissolubility in styrene .

Description

technical field [0001] The present invention relates to a method for synthesizing p-phenylene type unsaturated polyester resin (hereinafter abbreviated as UPR) with various recycled polyester wastes. Background technique [0002] Polyester was originally developed as a raw material for synthetic fibers. In recent years, polyester non-fiber applications have developed rapidly, and can be used as packaging containers such as beverages and food, polyester films and engineering plastics. Generally, waste products and leftovers are unavoidably produced at different stages of the polyester production process, and these polyester wastes account for about 3-5% of the production volume. At the same time, during the use of polyester, packaging materials such as polyester bottles are almost disposable, and the amount of waste generated has increased sharply. The quantity of these polyester wastes is huge, if discarded, it will not only cause great waste, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/52C08G63/78C08J11/04
CPCY02P20/143Y02W30/62
Inventor 钱建华刘坐镇
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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