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Cationic dyeable copolyester

A copolyester, cationic technology, applied in the direction of single-component copolyester rayon, single-component polyester rayon, fiber chemical characteristics, etc., can solve the problem of polyester heat resistance deterioration, spinning nozzle gold Short replacement cycle, yellow color and other problems

Inactive Publication Date: 2019-03-15
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two patents disclose that the dyeability can be improved by increasing the amount of sulfonate. The increase in the amount of sulfonate will not only bring about the problem of foreign matter, but also increase the spinning filter pressure and shorten the replacement period of spinning nozzle gold. Although the patent CN104109231A Use surfactants to suppress, but because surfactants are also salts, they also have the problem of incompatibility with polyester, so the effect of foreign matter improvement is limited; and it will lead to poor heat resistance of polyester, yellowish color, low yarn strength

Method used

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  • Cationic dyeable copolyester
  • Cationic dyeable copolyester
  • Cationic dyeable copolyester

Examples

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preparation example Construction

[0028] The preparation method of the cationic dyeable copolyester of the present invention includes esterification or transesterification reaction and polycondensation reaction.

[0029] The esterification reaction can be carried out while continuously adding the slurry of dibasic alcohol and dibasic carboxylic acid with a molar ratio of 1.1 to 2.5 in the esterification reaction tank in which the oligomer is pre-stored; It can be in the esterification reaction tank with the oligomer in advance, before the esterification reaction starts, after adding all the dibasic carboxylic acid and the dibasic alcohol, and then carrying out the esterification reaction; Acid and carboxylic acid are respectively added into the esterification tank, and the esterification reaction is carried out while stirring. The esterification reaction may not add a catalyst, or may add metal catalysts such as cobalt, magnesium, manganese, tin, and titanium.

[0030] In the transesterification reaction, the...

Embodiment 1

[0066] The slurry of 11.32kg terephthalic acid and 12.2kg 1,4-butanediol was subjected to esterification reaction in 500ppm tetrabutyl titanate and 500ppm n-butyl stannic acid catalyst, and after about 5 hours of reaction, the by-products were judged , when the esterification reaction rate reaches more than 97%, the prepared low molecular weight esterified product is moved into the polymerization kettle; the stabilizer phosphorus compound phosphoric acid 200ppm is added to the esterified product; wt% dimethyl isophthalate-5-sodium sulfonate (SIPM), bisphenol A polyoxyethylene ether (n+m=10 in formula 2) accounting for 8.0wt% of the total copolyester, catalyst titanium Acetate tetrabutyl ester (TBT) 500ppm, metal salt potassium acetate 1000ppm. Subsequently, the temperature was increased under reduced pressure at 250° C., and polymerization was carried out by conventional polyester polycondensation method to obtain a cationic dyeable copolymer. The physical properties are show...

Embodiment 2～4

[0068] Change the addition amount of dimethyl isophthalate-5-sodium sulfonate, others are the same as Example 1, and the results are shown in Table 1.

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Abstract

The invention discloses cationic dyeable copolyester which is mainly prepared by copolymerizing diol and aromatic dibasic acid or a derivative thereof, wherein the copolyester contains 0.05 to 2.00 percent by weight of a sulfonate structural unit A relative to the total amount of the copolyester based on a sulfur element, and 0.1 to 10.0 percent by weight of a bisphenol A polyoxyethylene ether structural unit B relative to the weight of the copolymer. The cationic dyeable copolyester has good color tone and is low in filtration pressure during spinning. A prepared fiber can be dyed with a cationic dye, has a bright color and excellent dyeing characteristics, and is high in yarn strength and good in fabric handfeel.

Description

technical field [0001] The invention relates to a cationic dyeable copolyester which reduces the melt spinning pressure and improves the yarn strength through polymer composition. Background technique [0002] The physical and mechanical properties of polyester are excellent, but due to the tight molecular chain structure of polyester, high degree of crystallinity and orientation, low polarity, and lack of hydrophilicity, there is no suitable accommodation for dye molecules between the long chain molecules of polyester. Gaps, so the dyeing effect of polyester is poor. [0003] In order to improve the dyeing effect of polyester fibers, researchers in this industry have conducted a lot of research. Chinese patent CN104109231A discloses a cationic dyeable polyester composition, the dyeability is improved by increasing the amount of sulfonate, and a surfactant is added to suppress the foreign matter generated by the sulfonate. Chinese patent CN102011207A discloses a cationic d...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08L67/02D01F6/84D01F6/92D01F1/10
CPCC08G63/6886C08J5/18C08J2367/02C08L67/02C08L2203/12C08L2203/16D01F1/10D01F6/84D01F6/92
Inventor 吴亚薇成娟柏立军旦浩一
Owner TORAY FIBER RES INST(CHINA) CO LTD
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