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A kind of isosorbide modified high heat-resistant biodegradable polyester and preparation method thereof

A biodegradable polyester and isosorbide technology, applied in the field of polyester materials, can solve the problems of non-biodegradability and achieve high isosorbide grafting rate, good color, and high heat resistance

Active Publication Date: 2022-05-24
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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  • A kind of isosorbide modified high heat-resistant 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: terephthalic acid and / or dialkyl terephthalate, 40-60% straight chain aliphatic diol, isosorbide, catalyst and stabilizer are added to the reactor , remove the air in the reactor with an inert gas and then heat up to 230-260 ° C, carry out the first-stage esterification reaction under 3MPa pressure until there is no distillate; then cool down to 150-210 ° C, add direct Chain fatty dicarboxylic acid and / or its dialkyl ester and / or its acid anhydride, and the remaining linear aliphatic diol, continue to esterify under normal pressure until the amount of distillate reaches more than 90% of the theoretical value, then proceed to the next step polycondensation reaction.

[0051] 2) Polycondensation reaction: after the esterification reaction is completed, slowly evacuate, remove the excess diol, make the vacuum degree within 60Pa after 50-70min, w...

Embodiment 1

[0054] 1) Esterification: 664.52g terephthalic acid, 121.04g ethylene glycol, 374.12g isosorbide, 0.016g stannous isooctoate and 0.21g trimethyl phosphate were added to the 2.5L reactor, and nitrogen was used to remove The air in the reactor is then heated up to 260°C to carry out the first-stage esterification reaction 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 nitrogen protection, usually Continue esterification 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, slowly vacuumize to remove excess diol, and the vacuum degree reaches the maximum in about 1h. While evacuating, the temperature was raised to 220°C. Continue to keep the vacuum degree below 60Pa for the reaction, and discharge the material after the reaction is completed...

Embodiment 2

[0057] 1) esterification reaction: 776.72g of dimethyl terephthalate, 121.04g of ethylene glycol, 374.12g of isosorbide, 0.016g of stannous isooctoate and 0.21g of trimethyl phosphate were added to the 2.5L reactor, After removing the air in the reactor with nitrogen, the temperature was raised to 250°C to carry out the first-stage esterification reaction until there was no distillate; then the temperature was lowered to 210°C, and 118.09g of succinic acid and the remaining 121.04g of ethylene glycol were added under the protection of nitrogen. alcohol, and continue to esterify under normal pressure until the amount of distillate reaches more than 90% of the theoretical value.

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

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Abstract

The invention relates to the field of polyester materials, and discloses a high heat-resistant biodegradable polyester modified by isosorbide and a preparation method thereof. The invention uses terephthalic acid or its dialkyl ester as a rigid component, and a linear Fatty dicarboxylic acids and / or their dialkyl esters and / or their dibasic acid anhydrides are degradation modification components, adding biomass-sourced isosorbide is a heat-resistant modification component, and isosorbide is obtained by direct esterification Alcohol-modified high heat-resistant biodegradable polyester. The polyester of the present invention has both biodegradability and high heat resistance. Compared with common degradable polyesters, the glass transition temperature (T g ) is at least 15°C higher than 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 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 landfill method is simple, but it takes more than 100 years for polyester to degrade completely; incineration is simple and fast, but it will cause serious pollution to the environment; in the way of recycling, the types of polyester that can be physically recycled and reused are limited, and the chemical recycling process is complex and high cost. Therefore, it is urgent to solve the current polyester environ...

Claims

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Application Information

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Patent Type & Authority Patents(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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