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Hydrophobic modified polyester and preparation method thereof

A hydrophobic modification, polyester technology, applied in polyester coatings, coatings and other directions, can solve the problems of high cost and large consumption, and achieve the effects of simple operation, simple preparation method, and easy industrial-scale implementation.

Active Publication Date: 2010-07-14
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are more and more literature reports on hydrophobic materials, the preparation process of most hydrophobic surfaces involves expensive low surface energy substances, which are used in large quantities and at high cost; in addition, some methods design specific equipment and harsh conditions, such as static electricity

Method used

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  • Hydrophobic modified polyester and preparation method thereof
  • Hydrophobic modified polyester and preparation method thereof
  • Hydrophobic modified polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Bishydroxyethyl terephthalate oligomer with a degree of polymerization of 2 to 4, ethylene glycol, and a fluorine-containing silicon modifier with a degree of polymerization of 45 (R f It is a straight-chain fluoroalkyl group with 6 carbon atoms with a fluorocarbon ratio of 1:1) mixed with antimony acetate, wherein the molar ratio of bishydroxyethyl terephthalate oligomer to ethylene glycol is 1:2, fluorosilicone The quality of the modifier is 6% of the quality of the bishydroxyethyl terephthalate oligomer, the consumption of antimony acetate is 0.013% of the quality of the bishydroxyethyl terephthalate oligomer, and the above mixture is under the protection of an inert gas Raise the temperature to 190°C, react for 1.5 hours, start vacuuming, and stir, and at the same time raise the temperature to 240°C, under the pressure of 0.1MPa, react for 1.5 hours, continue to increase the reaction temperature to 280°C, continue polycondensation under the pressure of 50Pa, and stir...

Embodiment 2

[0050] Mix bishydroxyethyl terephthalate oligomers with a degree of polymerization of 2 to 4, ethylene glycol, and antimony acetate, wherein the molar ratio of bishydroxyethyl terephthalate oligomers to ethylene glycol is 1:1.8, The consumption of antimony acetate is 0.013% of the bishydroxyethyl terephthalate oligomer quality, and this mixture is heated up to 200 ℃ under the protection of inert gas, and reacts for 1.3 hours; Start to vacuumize, start stirring, and heat up to 250 ℃ simultaneously, Under the pressure of 0.1MPa, after reacting for 15 minutes, stop the vacuum and stirring, and under the protection of inert gas, add the fluorosilicone modified with a polymerization degree of 45 in an amount of 6% of the mass of the bishydroxyethyl terephthalate oligomer. agent (R f Fluorocarbon ratio 1: 1 straight-chain fluoroalkyl group with 10 carbon atoms), after stirring for 15 minutes, continue to vacuumize, and react for 1 hour; continue to increase the reaction temperature ...

Embodiment 3

[0054] Mix bishydroxyethyl terephthalate oligomers with a degree of polymerization of 2 to 4, ethylene glycol, and antimony acetate, wherein the molar ratio of bishydroxyethyl terephthalate oligomers to ethylene glycol is 1:2.4, The consumption of antimony acetate is 0.013% of the bishydroxyethyl terephthalate oligomer quality, and the mixture is heated up to 210°C under the protection of an inert gas, and reacted for 1.4 hours; vacuumizing is started, stirring is started, and the temperature is raised to 245°C simultaneously, Under the pressure of 0.1MPa, after reacting for 15 minutes, stop the vacuum and stirring, and under the protection of inert gas, add the fluorosilicone modified with a polymerization degree of 45 in an amount of 12% of the mass of the bishydroxyethyl terephthalate oligomer. agent (R f Fluorocarbon ratio 1: 1 straight-chain fluoroalkyl group with 3 carbon atoms), after stirring for 15 minutes, continue vacuuming, and react for 1 hour; continue to increas...

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Abstract

The invention provides hydrophobic modified polyester, with a structural formula, wherein R1 and R2 are respectively C2-C8 alkyl, aryl or cycloalkyl, Rf is C1-C20 fluoroalkyl, n ranges from 6 to 141, m is 42-104. The preparation method of the polyester is as follows: mixing of dibasic acid, dibasic alcohol and a catalyst or mixing of dibasic ester, dibasic alcohol and a catalyst or mixing of oligomer of dibasic acid and dibasic alcohol, dibasic alcohol and a catalyst, and polyreaction under the temperature of 140-300 DEG C and the vacuum degree of 5-150Pa until the expected degree of polymerization is realized, thereby obtaining the hydrophobic modified polyester. The modified polyester has low surface energy and excellent hydrophobic properties, and is suitable for both spinning and textile processing.

Description

technical field [0001] The invention relates to a polyester polymer material, and specifically designs a hydrophobically modified polyester and a preparation method thereof. Background technique [0002] Hydrophobic materials have broad application prospects in daily life, industrial and agricultural production, military defense and other fields due to their special properties such as excellent anti-fouling, hydrophobic and oleophobic properties. For example, hydrophobic technology is used on outdoor antennas to avoid the influence of snow, thereby ensuring communication quality; used on the shell of ships and submarines, it can reduce water resistance; in the field of textiles, it can be made into hydrophobic fibers to weave new waterproof and moisture-permeable fabric; in addition, it can also be used for anti-corrosion surfaces, resistors, optical filters, chemical barriers, etc. [0003] Commonly used material modification methods include surface modification treatment ...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G81/00C08G63/695C09D167/02
Inventor 金剑
Owner CHINESE TEXTILE ACAD
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