PBAT fiber and preparation method thereof

A fiber and chain segment technology, applied in the field of polymer fiber preparation, can solve problems such as adhesion, inability to solve fibers, and change polymer crystallization properties, so as to speed up crystallization speed, avoid style changes, and improve dyeing performance.

Active Publication Date: 2021-07-16
XINJIANG BLUE RIDGE TUNHE CHEM IND JOINTSTOCK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent "A PBAT material with fast crystallization speed and its preparation method" (201810122762.7) provides a PBAT material with fast crystallization speed and its preparation method, which is obtained by adding a nucleating agent dimethylen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] Example 1

[0052] The preparation method of PBAT fibers, the steps are specific:

[0053] (1) Paralylene terephthalic acid esterification: phenylene terephthalic acid, butanediol, catalyst I (titanate titanate) and antioxidant I (phosphate triphenyl ester) were esterified after mixing in a certain proportion The reaction obtained by the polymerization of 2 parsenethemate;

[0054] The addition of the catalyst I is 5 ppm relative to the terephthalic acid; the addition amount of an antioxidant I is 100 ppm relative to the terephthalic acid; the molar ratio of terephthalic acid and butanediol is 1: 1.1;

[0055] The temperature of the esterification reaction is 180 ° C, the absolute pressure is 100 Pa, the esterification time is 300 min; the amount of water is deemed as esterification when the water is equal to 98% of the theoretical effluent;

[0056] (2) Esterification of adipic acid: adipic acid, butanediol, catalyst II (tetrabutyrate) and antioxidants II (triphenyl phosph...

Example Embodiment

[0071] Example 2

[0072] The preparation method of PBAT fibers, the steps are specific:

[0073] (1) Paralylene terephthalic acid esterification: phenylene terephthalic acid, butanediol, catalyst I (titanate titanate) and antioxidant I (phosphate triphenyl ester) were esterified after mixing in a certain proportion The reaction obtained by the polymerization of 4 terephthalate;

[0074] The addition amount of the catalyst I is 10 ppm relative to benzothylene terephthalic; the addition amount of an antioxidant I is 150 ppm relative to benzoic acid; the molar ratio of terephthalic acid and butanediol is 1: 1.1;

[0075] The temperature of the esterification reaction is 190 ° C, the absolute pressure is 0.1 MPa, the esterification time is 250 min; the amount of water is deemed to be esterified when the water is equal to 98% of the theoretical effluent;

[0076] (2) Esterification of adipic acid: adipic acid, butanediol, catalyst II (tetrabutyrate) and antioxidants II (triphenyl phos...

Example Embodiment

[0091] Example 3

[0092] The preparation method of PBAT fibers, the steps are specific:

[0093] (1) Esterification of terephthalic acid: terephthalic acid, butanediol, catalyst I (titanium titanate) and an antioxidant I (antioxidant 300) were esterified after mixing in a certain proportion The reaction is obtained to obtain a terephthalate which is 6 polymerization;

[0094] The addition amount of the catalyst I is 20 ppm relative to benzothylene terephthalic acid; the addition amount of an antioxidant I is 200 ppm relative to benzothylene terephthalic acid; the molar ratio of terephthalic acid and butanediol is 1: 1.2;

[0095] The temperature of the esterification reaction is 200 ° C, the absolute pressure is 0.2 MPa, the esterification time is 200 min; the amount of water is equal to 98% of the theoretical effluent is deemed to end;

[0096] (2) Esterification of adipic acid: adipate, butanediol, catalyst II (tetrabutyate) and antioxidants II (antioxidants 300) are mixed afte...

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Abstract

The invention relates to a PBAT fiber and a preparation method. Molecular chain segments of the PBAT fiber comprise a butylene terephthalate chain segment, a butylene adipate chain segment and an isophthalic acid-5-sodium sulfoisophthalic acid butanediol ester chain segment, the molar content of the butylene adipate chain segment is 50%-150% relative to the molar content of the butylene terephthalate chain segment, and the molar content of the isophthalic acid-5-sodium sulfoisophthalic acid butanediol ester chain segment is 0.5%-4% relative to the molar content of the terephthalic acid butanediol ester chain segment; and the breaking strength of the PBAT fiber is 2.0-5.5 cN/dtex, the elongation at break is 15%-60%, and the AA rate is greater than or equal to 98%. The preparation method comprises the following steps that terephthalic acid and adipic acid are correspondingly esterified and then subjected to pre-polycondensation, then two prepolymers are mixed, an isophthalic acid-5-sodium sulfonate ester is added, then final polycondensation is carried out, and finally the PBAT fiber is prepared by a melt spinning method. According to the PBAT fiber, the balance relation between the crystallization capacity and the performance of PBAT is regulated and controlled through the length of the chain segment, and the performance of the fiber is improved by introducing SSIPA into the chain segment.

Description

technical field [0001] The invention belongs to the technical field of polymer fiber preparation, and relates to a PBAT fiber and a preparation method. Background technique [0002] Poly(butylene adipate-butylene terephthalate) (PBAT), as an emerging biodegradable copolyester, is mainly based on 1,4-butanediol (BDO), hexylene Diacid (AA) and terephthalic acid (PTA) are prepared as raw materials. PBAT not only has the good thermal stability and mechanical properties of PBT polyester, but also has the good stretchability and ductility of aliphatic polyester, and can be degraded into water and carbon dioxide under natural conditions. PBAT can be used in fields such as packaging, medical and agricultural films. [0003] As a degradable plastic with excellent performance, PBAT can also be used in the field of textile and clothing. However, at present, PBAT is mainly produced by direct esterification or transesterification. The obtained high polymer is a random copolymer with l...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/688
CPCD01F6/84C08G63/6886
Inventor 丁建萍王华平翟春军吉鹏黎万丽张志峰刘博
Owner XINJIANG BLUE RIDGE TUNHE CHEM IND JOINTSTOCK
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