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

Method used

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  • Water-soluble copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] 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 were put into the 100L stainless steel reactor, And add 28g of zinc acetate, 28g of trifluoromethanesulfonic acid, under nitrogen system, stir at 55~80rpm rotating speed, heat up rapidly to 60~100 ℃ and react for 0.3 hours, then gradually heat up to 220 ℃ and heat preservation for 1 hour, and then react. The temperature was raised to 230-270°C and the reaction was carried out for about 2.2 hours, and the reaction was terminated when the amount of by-products produced reached 6.3 kg. Cool down to about 190°C, add 24g of antimony acetate and 15g of triphenyl phosphate, continue to heat up and slowly depressurize, adjust the rotational speed to 30~50rpm, control the temperature to between 255~285°C, and gradually reduce the pressure to below 100Pa. polycondensation reaction. Sampling and analysis...

Example Embodiment

[0032] Example 2

[0033]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 were put into the 100L stainless steel reactor, And add manganese acetate 32g, trifluoromethanesulfonic acid 35g, under nitrogen system, stir with 55~80rpm rotating speed, heat up rapidly to 70~110 ℃ after reaction 0.4 hour, be gradually warmed up to 230 ℃ insulation to carry out reaction 0.8 hour, then The temperature was raised to 245-275° C. to react for about 1.5 hours, and the reaction was terminated when the amount of by-products produced reached 6.1 kg. Cool down to about 190°C, add 25g of antimony acetate and 15g of triphenyl phosphate, continue to heat up and slowly depressurize, adjust the rotational speed to 35~45rpm, control the temperature to between 275~295°C, and gradually reduce the pressure to below 100Pa. polycondensation reaction. Sampling and analysis, when the viscosity of ...

Example Embodiment

[0035] Example 3

[0036] 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 were put into the 100L stainless steel reactor, and Add 23g of manganese acetate and 45g of methanesulfonic acid, stir with 60~70rpm rotating speed under nitrogen system, rapidly heat up to 65~120℃ and react for 0.45 hours, then gradually heat up to 225℃ and heat preservation for 1 hour, then heat up to 240 ℃ 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 slowly depressurize, adjust the rotational speed to 40-50rpm, control the temperature to between 260-285°C, and gradually reduce the pressure to below 100Pa A polycondensation reaction is carried out. Sampling and analysis, when the vis...

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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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