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Hyperbranched polyester and preparation method thereof

A technology of hyperbranched polyester and catalyst, applied in polyester coatings, coatings, etc., can solve problems such as inability to adapt to large-scale production or industrial equipment, and achieve the effect of no solvent pollution and high efficiency

Pending Publication Date: 2021-11-19
扬州帅帅高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis method of industrial polyester adopts melt polymerization, and there is no solvent in the system. On the one hand, it is economical, and on the other hand, it is environmentally friendly and pollution-free.
Therefore, the existing hyperbranched polyester synthesis methods are generally not suitable for large-scale production or industrial equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take by weighing: terephthalic acid 2000g, ethylene glycol 900g, tetramethyl pyromellitic acid 20g, zinc acetate 1g, ethylene glycol antimony 1.5g, trimethyl phosphate 3g, antioxidant 1010 (tetra[β-propane Acid] pentaerythritol ester) 3.6g.

[0023] Weigh terephthalic acid, ethylene glycol, tetramethyl pyromellitate, zinc acetate, trimethyl phosphate, and antioxidant 1010 in proportion and mix them evenly, add them to the reactor, and then cover the jacket of the reactor. Heating in an oil bath to 270°C with a heating rate of 2°C / min, judging the degree of transesterification and esterification by collecting by-products, when the overall reaction degree reaches above 95%, the first step of reaction ends;

[0024] Add the antimony ethylene glycol, and then carry out polycondensation reaction under a high vacuum environment with an absolute pressure of 50 pa. After the polycondensation reaction is completed, discharge, cool, and pelletize to obtain hyperbranched polyester...

Embodiment 2

[0026] Take by weighing: terephthalic acid 2000g, ethylene glycol 1200g, trimethyl citrate 35g, tetrabutyl titanate 0.8g, antimony oxide 1.2g, triethyl phosphate 4g, antioxidant 1010 (tetra[β-propane Acid] pentaerythritol ester) 6g.

[0027] Weigh and mix terephthalic acid, ethylene glycol, trimethyl citrate, tetrabutyl titanate, triethyl phosphate, and antioxidant 1010 in proportion, add them to the reaction kettle, and then clamp the reaction kettle The sleeve is heated to 270°C in an oil bath, and the heating rate is 1.5°C / min. The degree of transesterification and esterification is judged by collecting by-products. When the overall reaction degree reaches more than 95%, the first step of the reaction ends;

[0028] Add the above-mentioned antimony oxide, and then carry out polycondensation reaction under a high vacuum environment with an absolute pressure of 50 Pa. After the polycondensation reaction is completed, discharge, cool, and pelletize to obtain hyperbranched poly...

Embodiment 3

[0030] Take by weighing: terephthalic acid 2000g, ethylene glycol 1200g, tetramethyl hexahydropyromellitic acid 30g, zinc acetate 1g, ethylene glycol antimony 1g, trimethyl phosphate 2g, antioxidant 168 (three (2, 4-di-tert-butyl) phenyl phosphite) 4g.

[0031] Weigh terephthalic acid, ethylene glycol, tetramethyl hexahydropyromellitic acid, zinc acetate, trimethyl phosphate, and antioxidant 168 in proportion and mix them evenly, add them to the reaction kettle, and then clean the reaction kettle The jacket is heated in an oil bath to 270°C, and the heating rate is 3°C / min. The degree of transesterification and esterification reaction is judged by collecting by-products. When the overall reaction degree reaches more than 95%, the first step of reaction ends;

[0032] Add the above antimony ethylene glycol, and then carry out polycondensation reaction under a high vacuum environment with an absolute pressure of 50pa. After the polycondensation reaction is completed, discharge, ...

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PUM

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Abstract

The invention discloses hyperbranched polyester and a preparation method thereof. The preparation method of the hyperbranched polyester comprises the steps: weighing the following components in parts by mass: 100 parts of terephthalic acid, 40-100 parts of dihydric alcohol, 0.5-5 parts of polybasic acid methyl ester, 0.04-0.1 part of a first catalyst, 0.04-0.1 part of a second catalyst, 0.05-0.3 part of a stabilizer and 0.08-0.5 part of an antioxidant; uniformly mixing terephthalic acid, dihydric alcohol, polybasic acid methyl ester, the first catalyst and the stabilizer, adding the mixture into a reaction container, slowly heating to 270 DEG C, collecting byproducts in the reaction process to judge the reaction completion degree of ester exchange and esterification reaction, and ending the reaction when the reaction completion degree reaches 95% or above; and adding the second catalyst into the reaction container, then carrying out condensation polymerization under high vacuum, and after the reaction is finished, discharging, cooling and pelletizing to obtain the hyperbranched polyester. Compared with other hyperbranched polymers, the hyperbranched polymer is synthesized by a one-step method, is high in efficiency and can be amplified. Solvent pollution is avoided, and post-treatment is not needed.

Description

technical field [0001] The invention relates to the field of polyester molecular structure design and synthesis preparation methods, in particular to a 3D ink surface photocuring protective paint and a preparation method thereof. Background technique [0002] The synthesis of hyperbranched polymers usually requires controlled polymerization or multi-step repeated growth of macromolecular arms. In addition, the synthesis of most hyperbranched polymers requires organic solvents for dissolution and post-reaction. However, the synthesis method of industrial polyester adopts melt polymerization, and there is no solvent in the system. On the one hand, it is economical, and on the other hand, it is environmentally friendly and pollution-free. Therefore, the existing hyperbranched polyester synthesis methods are generally not suitable for large-scale production or industrial equipment. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior ...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/185C08G63/78C09D167/02
CPCC08G63/183C08G63/185C08G63/78C09D167/02C08G2150/00
Inventor 孙帅凌海坤王爽钟文
Owner 扬州帅帅高分子科技有限公司