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Polyester and fiber

A technology of polyester and fiber, which is applied in the field of monomer composition and ratio to form the polyester, and can solve the problems of expensive and difficult acquisition of low-melting nylon raw materials

Active Publication Date: 2020-08-07
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the low-melting-point fibers used in the production of woven shoe uppers are mainly single-component nylon long fibers, and their melting point can be lower than 110°C, but low-melting-point nylon raw materials are expensive and difficult to obtain

Method used

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  • Polyester and fiber
  • Polyester and fiber
  • Polyester and fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]With 300 grams (1.545mol) of DMT, 75 grams (0.386mol) of DMI, 34.8 grams (0.241mol) of CBDO, 320 grams (2.7mol) of ethylene glycol, and 200ppm (based on theoretical product weight) of Zinc acetate is added in the reaction tank. Nitrogen was introduced, heated to 200°C, and the stirring speed was 150 rpm to carry out the transesterification reaction. After continuing the reaction for three hours, the condensed methanol was removed and 0.055 g of thermal stabilizer phosphoric acid (the same molar amount as zinc acetate) and 0.0778 g of C-94 titanium catalyst (150 ppm, based on theoretical product weight) were added. The pressure in the reaction system was gradually reduced to 50 torr within 30 minutes to remove excess hexanediol monomer. Gradually heat the temperature to 280° C. and gradually reduce the reaction pressure to below 1 torr, and continue the reaction for 120 minutes. Finally, the vacuum was broken with nitrogen and the heating and stirring were stopped, and ...

Embodiment 2

[0028] With 300 grams (1.545mol) of DMT, 75 grams (0.386mol) of DMI, 41.7 grams (0.29mol) of CBDO, 320 grams (2.7mol) of ethylene glycol, and 200ppm (based on theoretical product weight) of Zinc acetate is added in the reaction tank. Nitrogen was introduced, heated to 200°C, and the stirring speed was 150 rpm to carry out the transesterification reaction. After continuing the reaction for three hours, the condensed methanol was removed and 0.055 g of thermal stabilizer phosphoric acid (the same molar amount as zinc acetate) and 0.0778 g of C-94 titanium catalyst (150 ppm, based on theoretical product weight) were added. The pressure in the reaction system was gradually reduced to 50 torr within 30 minutes to remove excess hexanediol monomer. Gradually heat the temperature to 280° C. and gradually reduce the reaction pressure to below 1 torr, and continue the reaction for 120 minutes. Finally, the vacuum was broken with nitrogen and the heating and stirring were stopped, and ...

Embodiment 3

[0030] With 75 grams (0.386mol) of DMT, 284.3 grams (1.545mol) of DmFDCA, 55.6 grams (0.386mol) of CBDO, 320 grams (2.7mol) of hexanediol, and 200ppm (based on theoretical product weight) of Zinc acetate is added in the reaction tank. Nitrogen was introduced, heated to 200°C, and the stirring speed was 150 rpm to carry out the transesterification reaction. After continuing the reaction for three hours, the condensed methanol was removed and 0.055 g of thermal stabilizer phosphoric acid (the same molar amount as zinc acetate) and 0.0778 g of C-94 titanium catalyst (150 ppm, based on theoretical product weight) were added. The pressure in the reaction system was gradually reduced to 50 torr within 30 minutes to remove excess hexanediol monomer. Gradually heat the temperature to 280° C. and gradually reduce the reaction pressure to below 1 torr, and continue the reaction for 120 minutes. Finally, the vacuum was broken with nitrogen and the heating and stirring were stopped, and...

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Abstract

Provided herein is a polyester obtained by copolymerizing (a) a diacid or a diester, which is (a1) and (a2) or a combination thereof, and (b) a diol, wherein each R1 is H or a C1-10 alkyl group, the diol is (b1) hexanediol and (b2) 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol, 1, 4-cyclohexanedimethanol, tricyclo [5.2. 1.0 (2, 6)] decanedimethanol, or a combination thereof, and the molar ratio of the (b1) hexanediol and (b2) 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol, 1, 4-cyclohexanedimethanol, tricyclo [5.2. 1.0 (2, 6)] decanedimethanol, or the combination thereof is 75:25 to 92:8. The invention also provides a fiber which comprises the polyester.

Description

technical field [0001] This disclosure pertains to polyesters and fibers comprising the polyesters, and more particularly to the composition and ratios of monomers that form the polyesters. Background technique [0002] Low-melting long-fiber fibers need to have sufficient fiber strength to meet the needs of high-speed weaving and high-production capacity when weaving shoe uppers on a flat knitting machine. The fibers cured by low-temperature heat-melting can reduce the shrinkage rate of the woven shoe upper, have good dimensional stability, and can improve the overall product production efficiency and reduce costs. At present, the low-melting-point fibers used in the production of woven shoe uppers are mainly single-component nylon long fibers, whose melting point can be lower than 110°C, but low-melting-point nylon raw materials are expensive and difficult to obtain. [0003] The use of polyester materials to develop low-melting-point fiber applications can overcome the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/199D01F6/84
CPCC08G63/199D01F6/84C08G63/183C08L67/02C08L2203/12
Inventor 黄承钧李秋煌张光伟詹淑华李淑真
Owner IND TECH RES INST
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