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Polyester with high heat resistance and high toughness, polyester product, and preparation method and application thereof

A high-toughness, high-heat-resistant technology, applied in the field of polyester, high-heat-resistant high-toughness polyester, polyester products and their preparation, can solve problems such as insufficient heat resistance, achieve improved transparency, excellent elongation at break, The effect of high structural rigidity

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

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a high heat-resistant high-toughness polyester and its preparation method to overcome the shortcomings of insufficient heat resistance of existing polyesters

Method used

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  • Polyester with high heat resistance and high toughness, polyester product, and preparation method and application thereof
  • Polyester with high heat resistance and high toughness, polyester product, and preparation method and application thereof
  • Polyester with high heat resistance and high toughness, polyester product, and preparation method and application thereof

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preparation example Construction

[0034] One aspect of the embodiments of the present invention provides a method for preparing a class of high heat-resistant and high-toughness polyester, which includes:

[0035] reacting the first mixed reaction system comprising bishydroxyethoxy polycyclic aromatic hydrocarbons, dibasic acids or esterified products thereof, dibasic alcohols, esterification or transesterification catalysts at 160-240°C to obtain intermediate products, wherein the dibasic acids The basic acid is any one or a combination of two or more of thiophenedicarboxylic acid, furandicarboxylic acid, and terephthalic acid;

[0036] reacting the second mixed reaction system comprising the intermediate product, the polycondensation catalyst and the stabilizer at 220-290°C under vacuum conditions to obtain a high heat-resistant and high-toughness polyester;

[0037] The bishydroxyethoxy polycyclic aromatic hydrocarbon has a structure as shown in any one of formula (1) to formula (9):

[0038] .

[0039]...

Embodiment 1

[0107] Dimethyl 2,5-thiophenedicarboxylate, bishydroxyethoxy polycyclic aromatic hydrocarbons (formula (2)), ethylene glycol, and 1,4-cyclohexanedimethanol in a molar ratio of 1:0.20:2.1:0.2 Add it into the reactor, then add the transesterification catalyst anhydrous zinc acetate with a molar weight of 0.8‰ of dimethyl 2,5-thiophenedicarboxylate, under the condition of nitrogen protection, gradually raise the temperature to 180°C for esterification, react for 4.0h, and then Add polycondensation catalyst antimony trioxide with a molar mass of dimethyl 2,5-thiophenedicarboxylate of 1.0‰, and stabilizer trimethyl phosphate with a molar weight of 1.0‰, gradually raise the temperature to 230°C, gradually reduce the vacuum degree to 50Pa, and react for 3.5 hours. The poly-2,5-thiophenedicarboxylic acid bishydroxyethoxy polycyclic aromatic hydrocarbon glycol 1,4-cyclohexanedimethanol copolyester is obtained, the structure of which is shown in formula (35). The intrinsic viscosity of ...

Embodiment 2

[0111] Add dimethyl 2,5-thiophenedicarboxylate, bishydroxyethoxy polycyclic aromatic hydrocarbon (formula (2)), and ethylene glycol into the reactor at a molar ratio of 1:0.1:2.1, and then add 2,5- Anhydrous zinc acetate with a molar mass of dimethyl thiophenedicarboxylate of 0.8‰, under the condition of nitrogen protection, gradually raise the temperature to 180°C for esterification, react for 3.5 hours, then add dimethyl 2,5-thiophenedicarboxylic acid with a molar mass of 0.8‰ antimony trioxide, 1.0‰ stabilizer trimethyl phosphate, gradually increase the temperature to 220°C, gradually reduce the vacuum degree to 20Pa, and react for 3.0h to obtain poly-2,5-thiophenedicarboxylic acid bishydroxyethoxy polycyclic aromatic hydrocarbons Ethylene glycol copolyester, the structure is as formula (36), the intrinsic viscosity of the copolyester is 0.76 dL / g, the glass transition temperature is 94 ℃, the cut-off is 700nm, the visible light transmittance is 90%, and the elongation at br...

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Abstract

The invention discloses polyester with high heat resistance and high toughness, a polyester product, and a preparation method and application of the polyester product. The preparation method comprisesthe step of copolymerizing bis (hydroxyethoxy) polycyclic aromatic hydrocarbon, binary acid or ester thereof and dihydric alcohol to prepare the high-heat-resistance and high-toughness polyester, andthe binary acid adopts thiophenedicarboxylic acid, furandicarboxylic acid, terephthalic acid and the like. According to the invention, dihydroxyethyl polycyclic aromatic hydrocarbon with excellent rigidity, high-activity hydroxyethyl and free-rotation oxygen ether bond is copolymerized with thiophene dioctyl phthalate, furan dioctyl phthalate and terephthalic acid or ester thereof, rigid alicyclic diol is introduced, and through the cooperation of the technical elements, the glass-transition temperature, toughness and visible light transmittance of the copolyester are effectively improved, sothe obtained copolyester has excellent properties of high glass-transition temperature, high transparency and high elongation at break, and can be widely applied to baby feeding bottle bodies, watercups, kitchen electrical products, hot-filled beverage bottles, optical base films, decorative materials, automobile parts and other products.

Description

technical field [0001] The invention relates to a polyester, in particular to a high heat-resistant and high-toughness polyester, a polyester product and a preparation method and application thereof, belonging to the technical field of polymer materials. Background technique [0002] Polyethylene terephthalate (PET) and new bio-based aromatic polyesters polyethylene furandicarboxylate (PEF) and polyethylene thiophene dicarboxylate (PETH) have high transparency, solvent resistance, Excellent properties such as impact resistance, but the glass transition temperatures are only 70°C, 87°C and 68°C respectively, and the heat-resistant temperature is low. It will be thermally deformed when it encounters boiling water. It cannot be used for water cups, kitchen appliances, etc., nor can it be used for heating Other occasions where the deformation temperature is greater than 100°C, such as optical base films that require heat resistance, decorative materials such as lighting, and aut...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/672C08G63/197C08G63/181C08G63/199C08G63/183C08G63/682C08G63/78C08J5/18B29B9/06B29C48/92B29C69/02B32B27/36B32B27/06C08L67/02B29K67/00
CPCB29B9/06B29C69/02B29K2067/00B29L2007/00B29L2007/002B32B27/06B32B27/36B32B2307/306B32B2307/412B32B2307/558B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904C08G63/181C08G63/183C08G63/197C08G63/199C08G63/672C08G63/6826C08G63/6886C08G63/78C08J5/18C08J2367/02
Inventor 王静刚张小琴朱颜柳刘小青朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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