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Polyester with high glass-transition temperature and high transparency, polyester product, and preparation method and application of polyester

A transition temperature, high vitrification technology, used in applications, flat products, other household appliances, etc., can solve problems such as thermal deformation, inability to use water cups, unusable, etc., to achieve good heat resistance, high transparency and visible light transmission. The effect of high rate and glass transition temperature

Active Publication Date: 2021-03-30
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

[0002] At present, the output of polyethylene terephthalate (PET) in China exceeds 40 million tons, and the global output exceeds 70 million tons, of which more than 5 million tons are used for beverage bottles and other container packaging, which must be highly transparent and impact-resistant. However, the glass transition temperature of PET is only 70°C. Above this temperature, thermal deformation occurs, so it cannot be used in occasions where the temperature is higher than 70°C. For example, it cannot be used in water cups, kitchen appliances, high-temperature disinfection products, automobile manufacturing, electronics, etc. Display film and other fields

Method used

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  • Polyester with high glass-transition temperature and high transparency, polyester product, and preparation method and application of polyester
  • Polyester with high glass-transition temperature and high transparency, polyester product, and preparation method and application of polyester
  • Polyester with high glass-transition temperature and high transparency, polyester product, and preparation method and application of polyester

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preparation example Construction

[0059] In some embodiments, the preparation method comprises:

[0060] Under a protective atmosphere, reacting the first mixed reaction system at 160-260° C. for 1.5-5.0 hours to obtain an intermediate product; and

[0061] The second mixed reaction system is reacted for 1.5-6.0 hours under the conditions of a temperature of 260-300° C. and a vacuum degree of 200 Pa or less, to obtain the high-glass-transition-temperature high-transparency polyester.

[0062] In some embodiments, the preparation method specifically includes:

[0063] The preparation method of the high glass transition temperature and high transparent polyester specifically includes: bishydroxyethoxy polycyclic aromatic hydrocarbons, terephthalic acid or its esterified products, diols, esterification or transesterification catalysts, at 160-260 React at ℃ for 1.5-5.0 hours to obtain the first product; then add polycondensation catalyst and stabilizer at 260-300℃, vacuum degree below 200Pa, react for 1.5-6.0 ho...

Embodiment 1

[0091] Add dimethyl terephthalate, bishydroxyethoxy polycyclic aromatic hydrocarbons, and ethylene glycol into the reactor according to the molar ratio of 1:0.10:2.1, and then add dimethyl terephthalate with a molar weight of 0.6‰ without Zinc acetate in water, under the condition of nitrogen protection, gradually raise the temperature to 180°C, react for 4.0h, then add antimony trioxide with a molar weight of 0.8‰ of dimethyl terephthalate, and 0.8‰ phosphorous acid, gradually raise the temperature to 280°C, Reduce the vacuum degree to 30Pa, react for 3.0h, and obtain polyterephthalic acid bishydroxyethoxy polycyclic aromatic hydrocarbon glycol copolyester, the structure is as shown in formula (III), and its intrinsic viscosity is 0.85dL / 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 98°C, and the thermal weight loss T 5% at 418°C, the TGA spectrum is as image 3 As shown, the cut-off 700nm visible ligh...

Embodiment 2

[0095] Add dimethyl terephthalate, bishydroxyethoxy polycyclic aromatic hydrocarbons, and ethylene glycol into the reactor according to the molar ratio of 1:0.20:2.1, and then add dimethyl terephthalate with a molar weight of 0.8‰ without Manganese acetate in water, under the condition of nitrogen protection, gradually raise the temperature to 170°C, react for 4.5h, then add antimony ethylene glycol with a molar weight of 1.0‰ of dimethyl terephthalate, and trimethyl phosphate with a molar weight of 1.0‰, and gradually raise the temperature to 282 ℃, vacuum reduced to 40Pa, and reacted for 3.5 hours to obtain polyterephthalic acid bishydroxyethoxy polycyclic aromatic hydrocarbon glycol copolyester, the structure of which is shown in formula (III), and its intrinsic viscosity is 0.82dL / g, glass The transition temperature is 107°C, and the visible light transmittance at 700nm is 91%.

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Abstract

The invention discloses polyester with a high glass-transition temperature and high transparency, a polyester product, and a preparation method and application of the polyester. The high-glass-transition-temperature high-transparency polyester has a structure as shown in a formula which is described in the specification. In the formula, x and y are integers from 1 to 10, z is an integer from 10 to100, and R is a residue of dihydric alcohol with 2 to 20 carbon atoms. The glass-transition temperature of the polyester is 90-160 DEG C, the visible light transmittance of the polyester is excellent, and the problem that the PET polyester is insufficient in heat resistance in the fields of baby bottle bodies, water cups, kitchen electrical products, hot-filled beverage bottles, optical base films, decorative materials, automobile manufacturing and the like can be effectively solved.

Description

technical field [0001] The invention relates to a polyester, in particular to a high-glass-transition-temperature high-transparency polyester and a preparation method and application thereof, belonging to the technical field of polymer materials. Background technique [0002] At present, the output of polyethylene terephthalate (PET) in China exceeds 40 million tons, and the global output exceeds 70 million tons, of which more than 5 million tons are used for beverage bottles and other container packaging, which must be highly transparent and impact-resistant. However, the glass transition temperature of PET is only 70°C. Above this temperature, thermal deformation occurs, so it cannot be used in occasions where the temperature is higher than 70°C. For example, it cannot be used in water cups, kitchen appliances, high-temperature disinfection products, automobile manufacturing, electronics, etc. display film and other fields. Contents of the invention [0003] The main pu...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/197C08G63/199C08G63/183C08G63/682C08G63/78C08J5/18B29B9/06B29C48/92B29C69/02B32B27/36B32B27/06C08L67/02B29K67/00
CPCB29B9/06B29C69/02B29K2067/00B29L2007/00B29L2007/002B32B27/06B32B27/36B32B2307/306B32B2307/412B32B2307/558B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904C08G63/183C08G63/197C08G63/199C08G63/672C08G63/6826C08G63/78C08J5/18C08J2367/02
Inventor 王静刚刘小青张小琴樊林慎昂朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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