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Polyester with high glass transition temperature and low melting point, polyester products, its preparation method and application

A low melting point polyester, high vitrification technology, used in applications, flat products, other household appliances, etc., can solve problems such as insufficient heat resistance, achieve energy saving, good thermal oxidation stability, and increase glass transition temperature. Effect

Active Publication Date: 2021-04-30
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a kind of bio-based polyester with high glass transition temperature and low melting point and its preparation method, to overcome the shortcoming of insufficient heat resistance of existing bio-based PEF low melting point polyester

Method used

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  • Polyester with high glass transition temperature and low melting point, polyester products, its preparation method and application
  • Polyester with high glass transition temperature and low melting point, polyester products, its preparation method and application
  • Polyester with high glass transition temperature and low melting point, polyester products, its preparation method and application

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preparation example Construction

[0037] One aspect of the embodiments of the present invention provides a method for preparing a bio-based polyester with a high glass transition temperature and a low melting point, which includes:

[0038] Making the first mixed reaction system containing the first dibasic acid or its esterified product, bishydroxyethoxy polycyclic aromatic hydrocarbon, diol, esterification or transesterification catalyst react at 160-220°C to obtain an intermediate product, wherein the The first dibasic acid adopts furandicarboxylic acid;

[0039] reacting the second mixed reaction system comprising the intermediate product, polycondensation catalyst and stabilizer at 200-260°C under vacuum conditions to prepare bio-based polyester with high glass transition temperature and low melting point;

[0040] The bishydroxyethoxy polycyclic aromatic hydrocarbon has a structure as shown in formula (1):

[0041] .

[0042] In some embodiments, the first dibasic acid or its esterified product is pr...

Embodiment 1

[0113] Add dimethyl 2,5-furandicarboxylate, bishydroxyethoxy polycyclic aromatic hydrocarbons, and ethylene glycol into the reactor at a molar ratio of 1:0.20:2.1, and then add dimethyl 2,5-furandicarboxylate Anhydrous zinc acetate with a molar mass of 0.8‰, under the condition of nitrogen protection, gradually raise the temperature to 180°C, react for 4.0 hours, then add antimony trioxide with a molar mass of 1.0‰ of dimethyl 2,5-furandicarboxylate, 1.0‰ For trimethyl phosphate, gradually raise the temperature to 240°C, reduce the vacuum to 20Pa, and react for 3.5 hours to obtain poly-2,5-furandicarboxylic acid bishydroxyethoxy polycyclic aromatic hydrocarbon glycol copolyester, the structure of which is shown in formula (2 ), its intrinsic viscosity is 0.75 dL / g, NMR 1 H-NMR such as figure 1 As shown, the DSC curve is as figure 2 As shown, the glass transition temperature is 109°C, and the thermal weight loss T 5% at 380°C, the TGA spectrum is as image 3 shown. Moreov...

Embodiment 2

[0117] Add dimethyl 2,5-furandicarboxylate, bishydroxyethoxy polycyclic aromatic hydrocarbons, and ethylene glycol into the reactor at a molar ratio of 1:0.10:2.1, and then add dimethyl 2,5-furandicarboxylate Anhydrous zinc acetate with a molar mass of 0.7‰, under nitrogen protection, gradually heat up to 185°C, react for 3.5 hours, then add antimony trioxide with a molar mass of 0.7‰ dimethyl 2,5-furandicarboxylate, 0.8‰ Phosphorous acid, gradually increase the temperature to 235 ° C, reduce the vacuum to 10 Pa, and react for 3.5 hours to obtain 2,5-furandicarboxylic acid bishydroxyethoxy polycyclic aromatic hydrocarbon ethylene glycol copolyester with an intrinsic viscosity of 0.76 dL / g , the glass transition temperature is 99°C, 240°C, 1200g weight, the melt index is 51g, and the melt viscosity at 240°C is 220Pa. S.

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Abstract

The invention discloses a high glass transition temperature and low melting point polyester, polyester products, their preparation methods and applications. The preparation method includes: copolymerizing bishydroxyethoxy polycyclic aromatic hydrocarbons, a first dibasic acid or its esterification product, a second dibasic acid or its esterification product and a glycol to obtain a bio-based high glass transition temperature Low melting point polyester, the first dicarboxylic acid is furandicarboxylic acid. The present invention copolymerizes bishydroxyethoxy polycyclic aromatic hydrocarbons with excellent rigidity and high activity of terminal hydroxyl groups and bio-based polyfurandicarboxylate compounds, and further improves the copolyester properties by introducing rigid alicyclic glycols. Heat resistance, so that the final polyester has excellent heat resistance and processing fluidity. Its glass transition temperature is 95~160℃, and the melt viscosity in the temperature range of 240~260℃ is less than 1000Pa·S , can be widely used in mixing cups of wall-breaking food processors, portable juice machines, noodle machines and other equipment, as well as juice barrels, milk bottle cups and other products.

Description

technical field [0001] The invention relates to a polyester, in particular to a bio-based polyester with a high glass transition temperature and a low melting point, a polyester product, a preparation method and application thereof, and belongs to the technical field of polymer materials. Background technique [0002] Polyethylene terephthalate (PET) is synthesized from terephthalic acid and ethylene glycol. It is widely used in chemical fiber, packaging materials, engineering plastics and other fields. The global annual output is more than 70 million tons, of which more than 40 million in China Ton. At present, terephthalic acid (TPA), the main raw material for PET production, is completely dependent on the petrochemical product paraxylene (PX). Finding green manufacturing of PX and its derivatives has become an important proposition to maintain the sustainable development of the polyester industry. Bio-based polymer materials use sustainable biomass and its platform compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672C08G63/197C08G63/199C08G63/181C08G63/682C08G63/78C08J5/18B29B9/06B29C48/92B29C69/02B32B27/36B32B27/06C08L67/02B29K67/00
CPCB29B9/06B29C69/02B29K2067/00B29L2007/00B29L2007/002B32B27/06B32B27/36B32B2307/306B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904C08G63/181C08G63/197C08G63/199C08G63/672C08G63/6826C08G63/78C08J5/18C08J2367/02
Inventor 王静刚张小琴樊林刘小青朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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