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Isosorbide-modified high-heat-resistance biodegradable polyester and preparation method thereof

A technology for biodegrading polyester and isosorbide, applied in the field of polyester materials, can solve problems such as non-biodegradability, and achieve the effects of high isosorbide grafting rate, optimized synthesis process, and good hue.

Active Publication Date: 2020-05-01
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned polyester has good heat resistance, it does not have biodegradability

Method used

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  • Isosorbide-modified high-heat-resistance biodegradable polyester and preparation method thereof

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preparation example Construction

[0049] A preparation method of high heat-resistant biodegradable polyester, comprising the following steps:

[0050] 1) Esterification reaction: Add terephthalic acid and / or dialkyl terephthalate, 40-60% straight-chain fatty diol, isosorbide, catalyst and stabilizer into the reaction kettle , use an inert gas to remove the air in the reactor and then raise the temperature to 230-260°C, carry out the first-stage esterification reaction under the pressure of 3MPa until there is no distillate; then cool down to 150-210°C, and add directly under the protection of nitrogen Chain aliphatic dicarboxylic acid and / or its dialkyl ester and / or its anhydride, and the remaining straight-chain aliphatic dihydric alcohol, continue to esterify under normal pressure until the amount of distillate reaches more than 90% of the theoretical value, then enter the next step polycondensation reaction.

[0051] 2) Polycondensation reaction: After the esterification reaction is completed, slowly vacuu...

Embodiment 1

[0054] 1) Esterification reaction: Add 664.52g of terephthalic acid, 121.04g of ethylene glycol, 374.12g of isosorbide, 0.016g of stannous isooctanoate and 0.21g of trimethyl phosphate into a 2.5L reaction kettle, and exhaust with nitrogen After the air in the reactor is warmed up to 260°C, the esterification reaction of the first stage is carried out until there is no distillate; then the temperature is lowered to 210°C, and 118.09g of succinic acid and the remaining 121.04g of ethylene glycol are added under the protection of nitrogen, usually The esterification is continued under pressure until the amount of distillate reaches more than 90% of the theoretical value.

[0055] 2) Polycondensation reaction: After the esterification reaction is completed, vacuumize slowly to remove excess glycol, and the vacuum degree reaches the maximum in about 1 hour. While evacuating, the temperature was raised to 220°C. Continue to keep the vacuum to react below 60Pa, and discharge the ma...

Embodiment 2

[0057] 1) Esterification reaction: 776.72g dimethyl terephthalate, 121.04g ethylene glycol, 374.12g isosorbide, 0.016g stannous octoate and 0.21g trimethyl phosphate were added to a 2.5L reaction kettle, Exclude the air in the reactor with nitrogen, then raise the temperature to 250°C to carry out the first stage esterification reaction until there is no distillate; then cool down to 210°C, add 118.09g of succinic acid and the remaining 121.04g of ethylene glycol under the protection of nitrogen Alcohol, under normal pressure, continue to esterify until the amount of distillate reaches more than 90% of the theoretical value.

[0058] 2) Polycondensation reaction: After the esterification reaction is completed, vacuumize slowly to remove excess glycol, and the vacuum degree reaches the maximum in about 1 hour. While evacuating, the temperature was raised to 220°C. Continue to keep the vacuum to react below 60Pa, and discharge the material after the reaction finishes.

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Abstract

The invention relates to the field of polyester materials, and discloses isosorbide modified high-heat-resistance biodegradable polyester and a preparation method thereof. According to the invention,terephthalic acid or dialkyl ester thereof is used as a rigid component, linear aliphatic dicarboxylic acid and / or dialkyl ester thereof and / or dibasic acid anhydride thereof is used as a degradationmodification component, biomass-derived isosorbide is added as a heat-resistant modification component, and the isosorbide-modified high-heat-resistance biodegradable polyester is obtained by a directesterification method. The polyester disclosed by the invention has biodegradability and high heat resistance; and compared with common degradable polyester, the glass transition temperature (Tg) ofthe polyester disclosed by the invention is increased by at least more than 15 DEG C in comparison with the glass transition temperature before modification.

Description

technical field [0001] The invention relates to the field of polyester materials, in particular to an isosorbide-modified high heat-resistant biodegradable polyester and a preparation method thereof. Background technique [0002] Since the industrial production of polyester by DuPont in the United States in 1953, polyester has been widely used because of its excellent performance and low price. In 2017, China's polyester output was 41.325 million tons, a year-on-year increase of 12.76%. At present, common polyester waste disposal methods include landfill, incineration and recycling. The way of landfill is simple, but it takes more than 100 years for polyester to be completely degraded; incineration is simple and fast, but it will cause serious pollution to the environment; the way of recycling, the types of polyester that can be physically recycled and reused are limited, and the chemical recycling process is complex, high cost. Therefore, it is urgent to start from the m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/20C08G63/78
CPCC08G63/20C08G63/78
Inventor 吴海强王松林徐锦龙
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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