Polyester resin as well as preparation method and application

A polyester resin and esterification technology, applied in the field of polyester resin, can solve problems such as restricted development, and achieve the effects of avoiding pollution, good storage, and optimizing conditions

Active Publication Date: 2015-06-24
九洲生物技术(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the first two methods have made great progress, such as the resolution of recycling technology, the quality of recycled products, the performance of natur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Esterification stage: Add 1.1183 mol of terephthalic acid, 1.0000 mol of isophthalic acid, 0.5649 mol of 3-hydroxypropionic acid, and 1.9170 mol of ethylene glycol into the three-necked flask reaction vessel under the condition of stirring rate of 100 R / min , neopentyl glycol 1.0486mol, tetrabutyl titanate 0.00006mol, zinc acetate 0.0005mol, heated to 180°C within 4 hours, and kept the temperature for 1.5 hours until the mixed solution in the reactor became clear and the outflow of by-products reached the theoretical level. When the by-product is more than 90%, enter the normal pressure reaction stage.

[0032] Atmospheric pressure reaction stage: adjust the stirring rate to 60R / min, add 0.0002 mol of antimony trioxide and 0.0006 mol of triphenyl phosphite to the reactor, and maintain the reaction temperature at 210°C for 15 minutes to make antimony trioxide and phosphorous acid After the triphenyl ester is mixed evenly, it enters the polycondensation stage.

[003...

Embodiment 2

[0036] Esterification stage: Add 1.1183 mol of terephthalic acid, 1.0000 mol of isophthalic acid, 0.5649 mol of 3-hydroxypropionic acid, and 1.9170 mol of ethylene glycol into the three-necked flask reactor under the condition of stirring rate of 90 R / min , 1.0486mol of 1, 2-propanediol, 0.00006mol of tetrabutyl titanate, 0.0005mol of zinc acetate, heated to 190°C within 4 hours, and kept for 1 hour until the mixed solution in the reactor became clear and the outflow of by-products reached the theoretical level. When the by-product is more than 90%, enter the normal pressure reaction stage.

[0037] Atmospheric pressure reaction stage: adjust the stirring rate to 70R / min, add 0.0002mol of antimony trioxide and 0.0006mol of triphenyl phosphite to the reaction kettle, and maintain the reaction temperature at 220°C for 10min to make antimony trioxide and phosphorous acid After the triphenyl ester is mixed evenly, it enters the polycondensation stage.

[0038] Polycondensat...

Embodiment 3

[0041] Esterification stage: Add 1.1183 mol of terephthalic acid, 1.0000 mol of isophthalic acid, 0.8972 mol of 3-hydroxypropionic acid, and 1.9170 mol of ethylene glycol into the three-necked flask reactor under the condition of stirring rate of 110 R / min , neopentyl glycol 1.0486mol, tetrabutyl titanate 0.00006mol, zinc acetate 0.0005mol, heated up to 200°C within 4 hours, and kept the temperature for 1.5 hours until the mixed solution in the reactor became clear and the outflow of by-products reached the theoretical level. When the by-product is more than 90%, enter the normal pressure reaction stage.

[0042] Atmospheric pressure reaction stage: adjust the stirring rate to 50R / min, add 0.0002mol of antimony trioxide and 0.0006mol of triphenyl phosphite to the reactor, and maintain the reaction temperature at 200°C for 10min to make antimony trioxide and phosphorous acid After the triphenyl ester is mixed evenly, it enters the polycondensation stage.

[0043] Polycon...

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PUM

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Abstract

The invention relates to polyester resin as well as a preparation method and application thereof. The polyester resin is prepared by firstly subjecting polybasic acids, polyol and 3-hydroxyalkanoate to esterification reaction under the action of esterification catalysts and then subjecting polybasic acids, polyol and 3-hydroxyalkanoate to polycondensation under the actions of polycondensation catalysts and stabilizing agents, wherein the feed molar ratio of polybasic acids to polyol to 3-hydroxyalkanoate is 1 to (1.3-1.6) to (0.25-0.65); the polybasic acids are terephthalic acid and isophthalic acid; the feed molar ratio of terephthalic acid to isophthalic acid is 1 to (0.88-0.91); polyol is selected from one or a composition of more of glycol, 1,2-propanediol, 1,4-butanediol, neopentyl glycol and 1,6-hexanediol. The polyester resin can be biologically degraded, has a low melting point, is stable, is insoluble in water and can be better stored at room temperature.

Description

technical field [0001] The invention relates to a polyester resin, its preparation method and application. Background technique [0002] Due to its low cost and excellent performance, polyethylene terephthalate (PET) has been widely used in food packaging industry, electronic appliances, medical and health care, building materials and automotive paint. However, PET has disadvantages such as strong rigidity, poor toughness, and low crystallization rate during use. Therefore, chemical modification methods are used to study modified PET, obtain new types of polyester with excellent performance, and expand the application of polyester products in new fields. It has been highly valued by the academic and industrial circles at home and abroad. [0003] In addition, the environmental pollution caused by the incineration of a large amount of polyester plastic waste has aroused great concern worldwide, and countries all over the world are studying countermeasures. Common methods inc...

Claims

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Application Information

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IPC IPC(8): C08G63/60C08G63/86C08K5/521C08K5/526C09J167/02C09J167/04C09D167/02C09D167/04
Inventor 刘志军
Owner 九洲生物技术(苏州)有限公司
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