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Production method of semi-dull titanium series polyester

A technology of titanium-based polyester and production method, which is applied in the production field of semi-matte polyester, can solve the problems of good hue, low intrinsic viscosity of polyester, reduced inhibitory effect, etc., and achieves good hue, high intrinsic viscosity, and good polymerization speed. Effect

Active Publication Date: 2021-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the TiO that exists in the prior art 2 When matting agent and titanium-based polyester catalyst are added to the polymerization system at the same time, TiO 2 The matting agent can inhibit the catalyst activity of titanium-based polyester, which causes the problem of low intrinsic viscosity and yellow color value of polyester. A new heat stabilizer for preparing semi-dull titanium-based polyester is provided. The heat stabilizer Effectively reduce TiO 2 The inhibitory effect of the matting agent on the activity of titanium-based polyester catalysts, the polyester obtained has the advantages of high intrinsic viscosity and good hue

Method used

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  • Production method of semi-dull titanium series polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of Heat Stabilizer B

[0051] Dissolve 9.9 grams (0.1 mol) of phosphoric acid in 21.2 grams of water, add in a reactor equipped with a stirrer, condenser and thermometer, drop 30.9 grams of ethylene glycol into the reactor, and react at 70 ° C for 4 hours to obtain heat stabilizer B.

[0052] Preparation of semi-dull polyester

[0053] Mix 500 grams of purified terephthalic acid, 243 grams of ethylene glycol and heat stabilizer B (the molar ratio of phosphorus atoms to added titanium atoms is 0.1:1) to form a slurry, add it to the polymerization kettle, and perform esterification Reaction, the esterification temperature is 230-255°C, and the water generated by the reaction is discharged through the rectification device. Add catalyst A (based on the polymer quality that generates, the weight of titanium atom is 5mg / kg) and the titanium dioxide content of 3.15 grams after esterification finishes and be the titanium dioxide / ethylene glycol suspension of 55%, ...

Embodiment 2

[0059] Preparation of semi-dull polyester

[0060] Prepare semi-dull polyester by the same method as in Example 1, adopt heat stabilizer B (the molar ratio of phosphorus atom and the added titanium atom is 3: 1), liquid state titanium series catalyst C is as catalyst (based on the polymer quality of generation , the weight of titanium atoms is 5mg / kg). The test results are shown in Table 1.

Embodiment 3

[0067] Preparation of Heat Stabilizer E

[0068] Dissolve 15.6 grams (0.1 mol) of sodium dihydrogen phosphate in 6.6 grams of water, add in a reactor equipped with a stirrer, condenser and thermometer, drop 41.3 grams of ethylene glycol into the reactor, and react at 170°C for 3 hours, heat stabilizer E was obtained.

[0069] Preparation of semi-dull polyester

[0070] Prepare semi-dull polyester by the same method as in Example 1, adopt heat stabilizer E (the molar ratio of phosphorus atom and added titanium atom is 5: 1), liquid state titanium series catalyst D is as catalyst (based on the polymer quality of generation , the weight of titanium atoms is 5mg / kg). The test results are shown in Table 1.

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Abstract

The invention relates to a production method of a semi-dull titanium-containing polyester and mainly solves the problem of the prior art that when both titanium dioxide dulling agent and titanium-containing polyester catalyst are added to a polymerization system, low characteristic viscosity and yellow color are caused to the polyester since the titanium dioxide dulling agent can inhibit the activity of the titanium-containing polyester catalyst. A thermal stabilizer for preparation of semi-dull titanium-containing polyesters is characterized by being a reaction product of at least one phosphorus compound and at least one alcohol having 2-10 carbon atoms; the problem above is well solved; the thermal stabilizer is applicable to the industrial production of semi-dull titanium-containing polyesters.

Description

technical field [0001] The invention relates to a production method of semi-dull polyester. Background technique [0002] Polyethylene terephthalate (hereinafter referred to as polyester) is the largest variety of synthetic fibers. With the increasing development of the global economy and the improvement of people's living standards, the textile and garment industry has developed rapidly. Semi-dull polyester chips have become the main raw materials for textile fibers due to their excellent dyeability and processing properties. Catalysts for polyester synthesis involve almost all main and subgroup elements except halogen elements and inert elements. At present, the polyester catalysts with more industrial application and research are mainly three series of catalysts: antimony, germanium and titanium. [0003] Antimony-based catalysts (including antimony trioxide, antimony acetate and antimony glycol, etc.) are the most commonly used polyester catalysts in polyester industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/85C08G63/183C08K5/521C08K3/22
CPCC08G63/183C08G63/85C08K3/22C08K5/521C08K2003/2241
Inventor 周芬熊金根周文乐王睿
Owner CHINA PETROLEUM & CHEM CORP