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Method for preparing cationic-dyeable copolyester

A copolyester, cationic technology, applied in the field of preparation of cationic dyeable copolyester, can solve the problems of no promotion value and use value, insignificant anti-hair and anti-pilling effect, insufficient softness to the hand, etc., and achieves optimized preparation. Method, good dyeability, smooth hand effect

Active Publication Date: 2013-07-17
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because SIPE is very easy to self-polymerize, when the amount of SIPE added is large, it will cause serious end breakage during spinning. Therefore, in order to ensure the spinning performance, the amount of SIPE added must be strictly limited.
At present, wool tops made by spinning cationic dyeable polyester have no obvious anti-pilling effect, and the softness is not enough, which is too different from natural fiber wool.
Therefore, there is no promotion value and use value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Put 3000kg of PTA, 1369kg of EG, 1kg of antimony trioxide and 0.45kg of trimethyl phosphate into the first esterification kettle, carry out esterification reaction at 250°C, dehydrate 650L, then introduce the second esterification kettle and cool down to 240°C, add TiO with a mass percentage concentration of 12.6% 2 96kg of EG solution, after stirring evenly, add 167kg of EG, stir for 5min, mix the solution evenly, add 375L of SIPE solution, react at 240°C for 90min, and collect about 300kg of EG in total. The reaction mixture was introduced into the polycondensation tank, and the temperature was raised. When the temperature reached 250°C, the vacuum was started, and the polycondensation reaction was carried out at a temperature below 60Pa for 60 minutes.

Embodiment 2

[0035] Put 3000kg of PTA, 1234kg of EG, 1kg of antimony trioxide and 0.45kg of trimethyl phosphate into the first esterification kettle, carry out esterification reaction at 250°C, dehydrate 650L, then introduce the second esterification kettle and cool down to At 240°C, add 222kg of EG, stir for 10min, and mix the solution evenly, then add 312L of SIPE solution, react at 240°C for 90min, and collect 250kg of EG in total. The reaction mixture was introduced into the polycondensation tank, and the temperature was raised. When the temperature reached 250°C, the vacuum was started, and the polycondensation reaction was carried out at a temperature below 60Pa for 80 minutes.

Embodiment 3

[0037]Put 3000kg of PTA, 1683kg of EG, 1kg of antimony trioxide and 0.45kg of trimethyl phosphate into the first esterification kettle, carry out esterification reaction at 250°C, dehydrate 650L, then introduce the second esterification kettle and cool down to At 240°C, add 111kg of EG, stir for 10min, and mix the solution evenly, then add 438L of SIPE solution, react at 240°C for 90min, and collect a total of 250kg of EG. The reaction mixture was introduced into the polycondensation tank, and the temperature was raised. When the temperature reached 250°C, the vacuum was started, and the polycondensation reaction was carried out at a temperature below 60Pa for 90 minutes.

[0038] The physical indexes of copolyester chips 1-3 are shown in Table 1.

[0039] Table 1 Physical indicators of copolyester chips

[0040] serial number

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PUM

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Abstract

The invention relates to a method for preparing cationic-dyeable copolyester. Wool tops manufactured by spinning the product obtained by the method have excellent anti-pilling effect and spinning property. The method for preparing the cationic-dyeable copolyester comprises the following steps that: (1) glycol and terephthalic acid undergo an esterification reaction; (2) a mixture obtained after the esterification reaction is added with the glycol and SIPE solution is added for ester exchange reaction after the mixture and the SIPE solution are uniformly mixed; (3) a mixture obtained after theester exchange reaction undergoes a condensation polymerization reaction to form the cationic-dyeable copolyester. In the step (2), the mol ratio of the added glycol to the terephthalic acid is 0.1:1-0.2:1, and the mole number of sulfonic acid groups in the SIPE solution is 2 to 3.5 percent of that in the terephthalic acid. The cationic-dyeable copolyester obtained by the method has excellent spinning property. Meanwhile, the wool tops manufactured by spinning have excellent dyeability and excellent anti-pilling effect and can replace wool.

Description

technical field [0001] The invention relates to a preparation method of cationic dyeable copolyester. Background technique [0002] Polyester fiber is a kind of common chemical fiber fabric fiber. Ordinary polyester is difficult to dye because of its regular molecular chain and no coloring group. It needs to be modified by adding a third monomer. The prepared cationic Dyed copolyester. The third monomer is dihydroxyethyl isophthalate-5-sodium sulfonate (hereinafter referred to as SIPE), which is esterified by dimethyl isophthalate-5-sodium sulfonate (hereinafter referred to as SIPM) and ethylene glycol. The exchange reaction is obtained, and ethylene glycol is used as a solvent at the same time. Because the transesterification is an equilibrium reversible reaction, the resulting SIPE solution is actually ethylene glycol mixed with SIPE, SIPM and methyl hydroxyethyl isophthalate-5-sulfonate The solution is measured by the total moles of sulfonic acid groups in the solution....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/78C08G63/688C08G63/183
Inventor 浦金龙陶冶沈建兴吴洪磊
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER
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