Five-membered ring static dissipative copolyester and its preparation method and application

A technology of electrostatic dissipation and copolyester, which is applied in the field of polyester, can solve problems such as unstable mechanical and thermal properties, and decreased crystallization properties, so as to maintain stable mechanical and thermal properties, improve mechanical properties, and change regularity Effect

Active Publication Date: 2021-04-13
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For example, a bio-based static dissipative polyester and its preparation method disclosed in the patent CN201810478570, a bio-based static dissipative polyester prepared on the basis of furan is mentioned, but the bio-based static dissipative polyester After the secondary processing, the mechanical properties and thermal properties become unstable, and the crystallization properties decrease significantly.

Method used

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  • Five-membered ring static dissipative copolyester and its preparation method and application
  • Five-membered ring static dissipative copolyester and its preparation method and application
  • Five-membered ring static dissipative copolyester and its preparation method and application

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preparation example Construction

[0054] The preparation flow chart of five-membered ring static dissipative copolyester of the present invention is as follows figure 1 As shown, the specific content is as follows:

[0055] (1) Esterification process stage:

[0056] The present invention introduces 2,5-thiophene dicarboxylic acid (TDCA), 2,5-furandicarboxylic acid (FDCA) and / or 2,5-pyrrole dicarboxylic acid (PDCA) in the esterification process section, and ethylene glycol ( EG) esterification reaction, the reason is that the aromaticity and structural symmetry of TDCA are weaker than that of the benzene ring, and the presence of a sulfur atom containing a lone pair of electrons in the thiophene ring increases the polarity of TDCA.

[0057] Therefore, the five-membered ring copolyester polyester material can be prepared by replacing TDCA; in addition, TDCA will increase the chemical polarity of the five-membered ring copolyester material and endow it with static dissipative properties.

[0058] (2) Condensati...

Embodiment 1

[0081] (1) In a 5L stainless steel autoclave, add 1032.9g 2,5-thiophene dicarboxylic acid (TDCA), 595.2g ethylene glycol (EG), 2g tetrabutyl titanate, and replace the air in the autoclave with nitrogen , carry out the esterification reaction at 240°C-250°C and 0.3-0.4MPa, and when no more water evaporates, release the pressure to normal pressure.

[0082] (2) 200g PEG 6000, 0.1g cobalt acetate, 0.28g phosphoric acid, 0.6g triphenyl phosphite, 75g bishydroxyethyl isophthalate-5-sodium sulfonate (SIPE) and 120g ethylene glycol (EG ) mix, stir evenly, add to the reaction kettle, raise the temperature to 270°C, gradually reduce the absolute pressure in the kettle to below 50Pa, and the reaction time is 2-3 hours until the viscosity of the system does not rise any more.

[0083] (3) After the reaction is finished, feed nitrogen gas to extrude the obtained melt, pelletize and dry to obtain five-membered ring copolyester static dissipative thiophene dicarboxylate ethylene glycol este...

Embodiment 2

[0086](1) In a 5L stainless steel autoclave, add 516.45g 2,5-thiophene dicarboxylic acid (TDCA), 468.27g 2,5-furandicarboxylic acid (FDCA), 595.2g ethylene glycol (EG), 2g titanium For tetrabutyl ester, after introducing nitrogen to replace the air in the kettle, carry out esterification reaction at 240°C-250°C and 0.3-0.4MPa, and release the pressure to normal pressure when no more water evaporates.

[0087] (2) Mix 0.1g of cobalt acetate, 0.28g of phosphoric acid, 0.6g of triphenyl phosphite with 120g of ethylene glycol (EG), stir evenly, add to the reaction kettle, raise the temperature to 270°C, and gradually The absolute pressure drops below 50Pa, and the reaction time is 2-3 hours until the viscosity of the system no longer rises.

[0088] (3) After the reaction is finished, feed nitrogen gas to press out the melt, pelletize and dry to obtain five-membered ring copolyester static dissipative thiophene dicarboxylate ethylene glycol ester chips.

[0089] Characterization:...

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Abstract

The invention relates to a five-membered ring static dissipative copolyester and its preparation method and application, belonging to the technical field of polyester. The general formula of the five-membered ring static dissipative copolyester is shown in the following formula I: wherein, x+y+z=50-300, and y and z are not 0 at the same time. The addition of thiophene dicarboxylic acid, furandicarboxylic acid, and pyrrole dicarboxylic acid to the five-membered ring static dissipative copolyester improves the flexibility of the polyester material chain segment, expands the range of molecular chain activities, and greatly changes The regularity of conventional polyester is broken, and the degree of chaos increases during the melting process, which is beneficial to the improvement of mechanical properties.

Description

technical field [0001] The invention relates to the technical field of polyester, in particular to a five-membered ring static dissipative copolyester and its preparation method and application. Background technique [0002] Polyethylene terephthalate (PET) has good physical and mechanical properties and chemical stability, large output and low price. It is used in textile fibers, films, bottled containers, food packaging, and engineering plastics industries such as automobiles and electronics. fields, have been widely and important applications. But there is a problem, the molecular structure of PET is regular, easy to crystallize, the moisture absorption rate is only 0.4% under the standard environment, and the surface resistivity is as high as 10 14 ohms / square, prone to static electricity. According to statistics, the annual loss of electronic products caused by electrostatic discharge in the US electronics industry is as high as 20 billion US dollars. [0003] In ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/688C08G63/685C08G63/672C08G63/78C08K3/22
CPCC08G63/672C08G63/6856C08G63/6886C08G63/78C08K3/22C08K2201/001C08K2201/011C08K2201/017
Inventor 杨崇岭
Owner GUANGDONG IND TECHN COLLEGE
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