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Water-soluble copolyester and preparation method thereof

A copolyester, water-soluble technology, used in textiles, papermaking, fiber processing, etc., can solve the problems of affecting production efficiency, fabric quality, poor hairiness attached to the slurry, and increased yarn breakage. Good adhesion to hairiness, reducing the effect of broken ends

Active Publication Date: 2011-06-01
中瀚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of fine-count, high-density and high-grade fabrics, and the widespread use of shuttleless and high-speed looms, the number of warp yarns after sizing these materials increases significantly during the weaving process, which seriously affects production efficiency and fabric quality.
The reason is that the adhesion of this type of textile sizing material is not enough, resulting in poor hairiness of the size

Method used

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  • Water-soluble copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put 14.6kg of terephthalic acid, 6.6kg of isophthalic acid, 9.5kg of dimethyl isophthalate-5-sodium sulfonate, 15.8kg of ethylene glycol and 2.5kg of caprolactone into a 100L stainless steel reaction kettle, Add 28g of zinc acetate and 28g of trifluoromethanesulfonic acid, stir at a speed of 55-80rpm under a nitrogen system, rapidly raise the temperature to 60-100°C and react for 0.3 hours, then gradually raise the temperature to 220°C and keep it warm for 1 hour, then Raise the temperature to 230-270°C to react for about 2.2 hours, and stop the reaction when the amount of by-products produced reaches 6.3kg. Cool down to about 190°C, add 24g of antimony acetate and 15g of triphenyl phosphate, continue to heat up and decompress slowly, adjust the speed to 30-50rpm, control the temperature to 255-285°C, and gradually reduce the pressure to below 100Pa polycondensation reaction. Sampling analysis, when the viscosity of the polymer reaches the expected value, the stirring ...

Embodiment 2

[0033]Put 19.9kg of terephthalic acid, 2.6kg of isophthalic acid, 7.1kg of dimethyl isophthalate-5-sodium sulfonate, 15.3kg of ethylene glycol and 4.4kg of caprolactone into a 100L stainless steel reaction kettle, And add 32g of manganese acetate and 35g of trifluoromethanesulfonic acid, stir at 55-80rpm under the nitrogen system, rapidly raise the temperature to 70-110°C for 0.4 hours, then gradually raise the temperature to 230°C and keep it warm for 0.8 hours, then Raise the temperature to 245-275°C to react for about 1.5 hours, and stop the reaction when the amount of by-products reaches 6.1kg. Cool down to about 190°C, add 25g of antimony acetate and 15g of triphenyl phosphate, continue to heat up and decompress slowly, adjust the speed to 35-45rpm, control the temperature to 275-295°C, and gradually reduce the pressure to below 100Pa polycondensation reaction. Sampling analysis, when the viscosity of the polymer reaches the expected value, the stirring is stopped, the v...

Embodiment 3

[0036] Put 15.9kg of terephthalic acid, 7.9kg of isophthalic acid, 4.7kg of dimethyl isophthalate-5-sodium sulfonate, 16kg of ethylene glycol and 7.1kg of caprolactone into a 100L stainless steel reaction kettle, and Add 23g of manganese acetate and 45g of methanesulfonic acid, stir at 60-70rpm under nitrogen system, rapidly raise the temperature to 65-120°C and react for 0.45 hours, then gradually raise the temperature to 225°C and keep it warm for 1 hour, then raise the temperature to 240°C The reaction was carried out at ~270°C for about 1.8 hours, and the reaction was terminated when the amount of by-products produced reached 6.0 kg. Cool down to about 190°C, add 24g of germanium dioxide and 15g of triphenyl phosphate, continue to heat up and decompress slowly, adjust the speed to 40-50rpm, control the temperature to 260-285°C, and gradually reduce the pressure to below 100Pa polycondensation reaction. Sampling analysis, when the viscosity of the polymer reaches the expec...

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Abstract

The invention discloses water-soluble copolyester and a preparation method thereof. Caprolactone, dicarboxylic acid or ester thereof, m-benzene sulfonate and dihydric alcohol are adopted as raw materials, and the method comprises the following steps of: raising the temperature to catalyze quick ring opening; and raising the temperature for esterification and polycondensation. The polyester resin has good water solubility and better adhesion; and when used for textile sizing, the polyester resin can well adhere to hairs to greatly reduce the end breakage of warp yarns in the weaving process; therefore, the production efficiency and the quality of textiles are improved.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and relates to the preparation of water-soluble copolyester, in particular to a water-soluble copolyester for textile sizing and a preparation method thereof. Background technique [0002] Warp sizing is very important in the textile process and directly affects textile efficiency and quality. For a long time, polyvinyl alcohol (PVA) has been used as one of the main textile sizing materials. It is not easy to dissolve in use, the sizing film is too hard, the price is high, and desizing is not easy to degrade and pollute the environment. It is an "unclean sizing material". The import of PVA size and fabrics containing PVA size has been expressly prohibited. Our country also clearly proposes to "use less or no PVA" as the development direction. Therefore, people have been working hard to develop new polymers for textile sizing. Starting from the "similar compatibility" of polymers, the d...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/78D06M15/507
Inventor 金旭贾林华道本黄志远
Owner 中瀚新材料科技有限公司
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