Hydrophilic polyester and preparation method thereof

A hydrophilic, polyester technology, applied in the direction of one-component copolyester rayon, etc., to achieve the effect of improving hydrophilic performance, improving hydrophilic performance and reducing development cost

Active Publication Date: 2013-02-13
SHANGHAI YITAN NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of sorbi

Method used

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  • Hydrophilic polyester and preparation method thereof
  • Hydrophilic polyester and preparation method thereof
  • Hydrophilic polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]

[0041] Mix terephthalic acid and ethylene glycol in proportion to prepare slurry. Mix the prepared slurry with the catalyst tetrabutyl titanate in proportion and then add it to the esterification reactor for the first esterification reaction. The temperature of the first esterification reaction is 225°C, the reaction time is 4 hours, and the relative pressure of the reaction is 0 MPa. The by-product water is separated and collected by a fractionating tower, and the collection amount is measured with a graduated cylinder, and the theoretical value is calculated according to the reaction formula. When the collection amount of water reaches 82% of the theoretical value, add sorbitol and polyethylene glycol (PEG-2000 ) to carry out the second esterification reaction, the temperature of the second esterification reaction is 240° C., the pressure is normal pressure, and the esterification reaction time is 1 h. After the esterification reaction is completed, the esterifi...

Embodiment 2

[0045]

[0046]

[0047] Mix terephthalic acid and ethylene glycol in proportion to prepare slurry. Mix the prepared slurry with ethylene glycol antimony, antioxidant 1010 and trimethyl phosphate in proportion and then add it to the esterification reactor for the first esterification reaction. The temperature of the first esterification reaction is 250°C, and the reaction time is 0.5h, the relative pressure of the reaction is 0.4MPa. Water is separated and collected by a fractionating tower, and the collected amount is measured with a measuring cylinder, and the theoretical value is calculated according to the reaction formula. When the collected amount of by-product water reaches 95% of the theoretical value, add sorbitol and polyethylene glycol (PEG-4000 ) to carry out the second esterification reaction, the temperature of the second esterification reaction is 260°C, the pressure is normal pressure, and the esterification reaction time is 0.5h. After the esterificatio...

Embodiment 3

[0049]

[0050] Mix terephthalic acid and ethylene glycol in proportion to prepare slurry. Mix the prepared slurry with the mixture of antimony trioxide and tetrabutyl titanate, antioxidant 168 and alkyl phosphoric acid diester in proportion, and then add it to the esterification reactor for the first esterification reaction. The temperature of the first esterification reaction is The temperature is 240°C, the reaction time is 3h, and the relative pressure of the reaction is 0.3MPa. Water is separated and collected by a fractionating tower, and the collected amount is measured with a graduated cylinder, and the theoretical value is calculated according to the reaction formula. When the collected amount of by-product water reaches 92% of the theoretical value, add sorbitol and polyethylene glycol (PEG-6000 ) to carry out the second esterification reaction, the temperature of the second esterification reaction is 250° C., the pressure is normal pressure, and the esterificatio...

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PUM

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Abstract

The invention provides a hydrophilic polyester and a preparation method of the hydrophilic polyester. The hydrophilic polyester is characterized in that the molecular chain comprises two chain segments like -COC6H4COOCH2CH2O- and -COC6H4COOCH2CH(OH)CH(OH)CH(OH)CH(OH)CH2O- with a quantitative proportion of 100:0.1-2.0; the intrinsic viscosity is 0.50-0.85g/dl and the melting temperature is 210-265 DEG C. The introduction of the hydrophilic groups into the polyester macromolecular chain and the change of the polyester crystal structure by increasing an amorphous zone are beneficial to the enterance of the water molecules, thereby increasing the hydrophilicity of the polyester, and the surface contact angle of the polyester chip is 40-65 degrees. The spun fiber has higher moisture regain rate and can be used for underwear, sporting suit, liner and the like. The method provided by the invention applys trace additive for the modification of the polyester, the additive has a few effects on the polymerization process, polyester quality and spinnability owing to the small addition amount. The obtained polyester has good modification effect and is especially suitable for melt direct spinning. The method provided by the invention reduces the development cost of the product and is easy to realize industrial production.

Description

technical field [0001] The invention relates to a hydrophilic polyester and a preparation method thereof. Background technique [0002] Since polyester and polyester fiber entered large-scale industrialization in the 1970s, the development speed is much faster than other synthetic materials and synthetic fibers. In 2010, the output of polyester fiber in my country was 25.13 million tons, accounting for about 81% of my country's chemical fiber output; [0003] It accounts for about 70% of the world's polyester fiber production. In the next 10 years, the world's polyester and polyester fiber will still maintain a growth rate of more than 3%, and polyester fiber will account for more than 60% of the world's total fiber products. The physical and mechanical properties of polyester fibers such as strength, abrasion resistance, resilience and dimensional stability can better meet the needs of various uses. However, polyester fiber is a typical hydrophobic fiber with a moisture r...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/85C08G63/86D01F6/84
Inventor 王朝生王华平张玉梅陈向玲李建武王琼王勇
Owner SHANGHAI YITAN NEW MATERIAL CO LTD
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