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Preparation method and recovery method of recoverable PETG material

A recovery method and slurry technology, which is applied in the field of preparation of recyclable PETG materials, can solve the problems of insignificant effect and difficulty in maintaining the intrinsic viscosity of polyurethane, and achieve high recovery efficiency, excellent intrinsic viscosity, and the effect of maintaining intrinsic viscosity

Active Publication Date: 2022-07-12
河南源宏高分子新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chain extender effect used in the prior art is often not obvious, and it is not easy to maintain the intrinsic viscosity of polyurethane

Method used

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  • Preparation method and recovery method of recoverable PETG material
  • Preparation method and recovery method of recoverable PETG material
  • Preparation method and recovery method of recoverable PETG material

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0050] 294g of biphenyltetracarboxylic dianhydride and 1860g of ethylene glycol were added to the reactor, and the reaction was carried out at 60°C for 24h.

[0051] Add 16268g of terephthalic acid and 10080g of 1,4 cyclohexanedimethanol into the reactor, under nitrogen atmosphere, add 0.5% antimony trioxide of the total mass at room temperature, slowly heat up, and react at 100°C 2h, the temperature was raised to 140°C for 1h reaction, the temperature was raised to 180°C for 1h reaction, the temperature was raised to 230°C and the reaction was incubated for 2h, and dehydration.

[0052] Under nitrogen protection, add 0.5% antimony acetate by total mass at room temperature, evacuate, and slowly heat up to 280°C until the on-line test torque reaches the set value.

preparation Embodiment 2

[0054] 441 g of biphenyltetracarboxylic dianhydride and 1860 g of ethylene glycol were added to the reactor, and the reaction was carried out at 60° C. for 24 h.

[0055] 16102g of terephthalic acid and 10080g of 1,4 cyclohexanedimethanol were added to the reactor, under nitrogen atmosphere, 0.5% antimony trioxide of the total mass was added at room temperature, the temperature was slowly raised, and the reaction was carried out at 100 ° C for 2h, The temperature was raised to 140 °C for reaction for 1 h, the temperature was raised to 180 °C for reaction for 1 h, the temperature was raised to 230 °C and the reaction was incubated for 2 h, and then dehydrated.

[0056] Under nitrogen protection, add 0.5% antimony acetate by total mass at room temperature, evacuate, and slowly heat up to 280°C until the on-line test torque reaches the set value.

preparation Embodiment 3

[0058] 588g of biphenyltetracarboxylic dianhydride and 1860g of ethylene glycol were added to the reactor, and the reaction was carried out at 60°C for 24h.

[0059] Add 15936g of terephthalic acid and 10080g of 1,4 cyclohexanedimethanol into the reactor, under nitrogen atmosphere, add 0.5% antimony trioxide of the total mass at room temperature, slowly heat up, and react at 100°C 2h, the temperature was raised to 140°C for 1h reaction, the temperature was raised to 180°C for 1h reaction, the temperature was raised to 230°C and the reaction was incubated for 2h, and dehydration.

[0060] Under nitrogen protection, add 0.5% antimony acetate by total mass at room temperature, evacuate, and heat up to 280° C. until the on-line test torque reaches the set value.

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Abstract

The invention discloses a preparation method and a recycling method of a recyclable PETG (polyethylene terephthalate glycol) material. The recyclable PETG material prepared by the preparation method has the advantages of excellent intrinsic viscosity, mild reaction conditions, high efficiency and aging resistance; the recovery method has high recovery efficiency, and can maintain the original intrinsic viscosity of the original PETG material.

Description

technical field [0001] The invention relates to a recyclable PETG material, and more particularly to a preparation method of the recyclable PETG material and a recycling method thereof. Background technique [0002] Poly(ethylene terephthalate-1,4-cyclohexylenedimethylene terepthalate) (PETG) is composed of terephthalic acid (PTA), ethylene glycol (EG ) and 1,4-cyclohexanedimethanol (CHDM) monomers are obtained by transesterification and polycondensation. They have excellent molding properties, can be made into various shapes, and are easy to bond. It will not produce unpleasant odor during thermal processing, will not release toxic gas during incineration, and will not pollute groundwater sources after landfill treatment. It is a new type of environmentally friendly copolyester chemical industry. Material. [0003] At the same time, as an amorphous and highly transparent engineering plastic, PETG is widely used in daily necessities and industrial supplies. Because of its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/199C08G63/86C08J11/10C08L67/02
CPCC08G63/199C08G63/866C08J11/10C08J2367/02Y02W30/62
Inventor 董冲宋厚春王洋朱亚凯
Owner 河南源宏高分子新材料有限公司
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