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Polyester with high glass-transition temperature and low melting point, polyester product, and preparation method and application thereof

A technology of low melting point polyester and high vitrification, applied in polyester, polyester products and their preparation, bio-based high glass transition temperature and low melting point polyester field, can solve problems such as insufficient heat resistance, save energy, The effect of good flow, excellent heat resistance and processing fluidity

Active Publication Date: 2021-04-02
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 product, and preparation method and application thereof
  • Polyester with high glass-transition temperature and low melting point, polyester product, and preparation method and application thereof
  • Polyester with high glass-transition temperature and low melting point, polyester product, and preparation method and application thereof

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[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 polyester with high glass-transition temperature and low melting point, a polyester product, and preparation methods and applications of the polyester and the polyester product. The preparation method comprises the following steps: copolymerizing bis (hydroxyethoxy) polycyclic aromatic hydrocarbon, first dibasic acid or ester thereof, second dibasic acid or ester thereof and dihydric alcohol to prepare bio-based polyester with high glass-transition temperature and low melting point, wherein the first dibasic acid is furandicarboxylic acid. According to the invention, the dihydroxyethyl polycyclic aromatic hydrocarbon with excellent rigidity and hydroxyl-terminated high activity and the bio-based polyfurandicarboxylate compound are copolymerized, and rigid alicyclicdiol is introduced to further improve the heat resistance of the copolyester, so the finally obtained polyester has excellent heat resistance and processing fluidity at the same time; the glass-transition temperature is 95-160 DEG C, the melt viscosity within the temperature range of 240-260 DEG C is lower than 1,000Pa.S, and the device can be widely applied to stirring cups of wall-breaking foodprocessers, portable juice makers, noodle makers and other equipment, juicing barrels of juice makers, feeding bottle cup bodies 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 Applications(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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