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Method for producing hydrolysis-resistant polyester composition

A production method and composition technology, applied in the field of production of hydrolysis-resistant polyester composition, can solve problems such as unfavorable use, toxicity, price, and high cost, and achieve good hydrolysis resistance

Inactive Publication Date: 2012-01-18
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent 3,193,522 discloses the stabilization of polyesters with polycarbodiimide, and Example 4 of this patent discloses the stabilization of copolyetherester elastomers with polycarbodiimide, although the addition of polycarbodiimide improves Hydrolytic stability is improved, but it has the disadvantages of toxicity and high price, which is not conducive to its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A method for producing hydrolysis-resistant polyester. In the polycondensation reaction, an inorganic phosphate buffer is added; the polyester is vacuum-dried at 130°C for 15 hours, mixed with an end-capping agent, and then added to a double temperature of 200 rpm and 280°C The capping reaction is carried out in a screw extruder. Relative to the weight of polyester, the addition amount of phosphorus element in inorganic phosphate or composite inorganic phosphate is 1~100ppm. Relative to the weight of the polyester, the content of the end-capping agent is 0.01-10%.

[0058] Concrete reaction process is as follows:

[0059] At a temperature of 250°C, 166 parts (weight) of terephthalic acid and 75 parts (weight) of bioethylene glycol were subjected to a direct esterification reaction for 4 hours, and the resulting reaction product was placed in a polymerization flask, and With the addition of 120ppm of antimony element in the catalyst antimony trioxide compound (AR, Shan...

Embodiment 2

[0062] The dosage of each compound: the addition amount relative to the polyester weight is:

[0063] The addition amount of phosphorus element in the phosphorus compound is 32ppm,

[0064] The amount of phosphorus added in potassium dihydrogen phosphate is 53ppm,

[0065] The addition amount of end-capping agent KH560 is 0.5wt%.

[0066] All the other are the same as in Example 1, the intrinsic viscosity of the gained polyester is 0.655, the overlapping time is 2 hours and 55 minutes, the L value of the hue of the polyester chips is 65.2, and the b value is 6.7. The COOH content of the polyester before hydrolysis treatment was 15eq / t, and its %BB measured after hydrolysis treatment was 0.29. The results of observation of foreign matter were: 22 foreign bodies with a size of 1 to 8 μm, 2 with a size larger than 8 μm, and a melting point of 253.5°C.

Embodiment 3

[0068] The dosage of each compound: the addition amount relative to the polyester weight is:

[0069] The addition amount of phosphorus element in the phosphorus compound is 32ppm,

[0070] The amount of phosphorus element added in sodium dihydrogen phosphate is 9.5ppm,

[0071] The amount of phosphorus added in disodium hydrogen phosphate is 59.5ppm,

[0072] The addition amount of end-capping agent KH560 is 0.5wt%.

[0073] All the other are the same as in Example 1, the intrinsic viscosity of the obtained polyester is 0.658, the overlapping time is 3 hours and 05 minutes, the color tone L value of the polyester chip is 63.5, and the b value is 6.5. The COOH content of the polyester before hydrolysis treatment was 17eq / t, and its %BB measured after hydrolysis treatment was 0.36. The results of observation of foreign matter were: 27 foreign bodies with a size of 1 to 8 μm, 3 with a size larger than 8 μm, and a melting...

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PUM

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Abstract

The invention discloses a method for producing a hydrolysis-resistant polyester composition. Aromatic dicarboxylic acid or derivates of aromatic dicarboxylic acid and aliphatic diol have polycondensation reaction to obtain polyester; the polyester which is obtained through the polycondensation reaction and contains carboxyl at the bottom end and an end-capping agent are subjected to mixed refining to obtain the hydrolysis-resistant polyester composition; a polyester slice obtained through the method has ideal hydrolysis resistance; through hydrolysis experiment, the percent of BB is relatively small; and simultaneously, the small number of exogenous impurities with large dimension is kept. The carbon element of the diol composition in a product comes from a biological material rather than a petroleum material, thereby greatly reducing the amount of CO2 discharged outwards caused by the smelting of petroleum.

Description

Technical field: [0001] The invention relates to a production method for producing a hydrolysis-resistant polyester composition. Background technique: [0002] In recent years, with the deterioration of the human living environment, people pay more and more attention to the development of environmentally friendly materials and the use of renewable raw materials. Petroleum, as a non-renewable resource, is the most important chemical raw material, but due to the large amount of CO in use engineering and final waste 2 emissions, CO 2 A large amount of emissions has led to a series of problems such as global warming, and directly threatens the survival of human beings. How to replace and reduce the use of petroleum as raw materials is one of the important research issues facing people. [0003] Now people use renewable biological resources to develop various new polyesters. For example, DuPont has prepared 1,3-PDO by fermenting corn through biological and chemical processes, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/32C08L67/03C08G63/181C08K5/54C08G63/78
Inventor 卢群英盛思义李旭本田圭介
Owner TORAY FIBER RES INST(CHINA) CO LTD