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Preparation method of normal pressure cation dyeable copolyester

A technology of cationic and copolyester, which is applied in the field of preparation of cationic dyeable copolyester at normal pressure, can solve the problems of inability to dye at normal pressure and high dyeing temperature, achieve optimized preparation method, simple raw material components, and reduce cost Effect

Active Publication Date: 2011-11-09
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the dyeing performance of the above-mentioned cationic dyeable copolyester is greatly improved, the dyeing temperature still needs to be above 100°C, and normal pressure dyeing cannot be carried out.
CN200810093836.5 discloses a copolyester polymer that can be dyed with cationic dyes under atmospheric pressure. It is modified by copolymerization of SIPE and dibasic fatty acid. Due to the limitation of the preparation method, although the obtained copolyester polymer spun fiber Can be dyed under atmospheric pressure, but the dyeing temperature is still as high as 95°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Put 3000kg of PTA, 50kg of IPA, 1369kg of EG, 0.09kg of cobalt acetate, 0.6kg of antimony trioxide and 0.36kg of trimethyl phosphate into the first esterification kettle, carry out esterification reaction at 250°C, and dehydrate 650L Finally, introduce the second esterification tank and lower the temperature to 240°C. After stirring evenly, add 253kg of EG and stir for 5 minutes. After the solution is mixed evenly, add 750L of SIPE solution, react at 240°C for 90min, and collect about 500kg of EG. The reaction mixture is introduced into the polycondensation kettle, and 150kg of adipic acid is quantitatively added to the polycondensation kettle, and the temperature is raised. When the temperature reaches 250°C, vacuuming is started, and the polycondensation reaction is carried out at a temperature below 60Pa for 150min. The temperature is controlled at 250°C-285°C. material, pelletized to obtain copolyester chip 1.

Embodiment 2

[0043]Put 3000kg of PTA, 50kg of IPA, 1369kg of EG, 0.15kg of cobalt acetate, 0.75kg of antimony trioxide and 0.36kg of trimethyl phosphate into the first esterification kettle, carry out esterification reaction at 250°C, and dehydrate 650L Afterwards, introduce the second esterification tank and lower the temperature to 240°C, add 167kg of EG, stir for 10min, mix the solution evenly, add 560L of SIPE solution, react at 240°C for 90min, and collect a total of 400kg of EG. The reaction mixture is introduced into the polycondensation kettle, and 160kg of adipic acid is quantitatively added to the polycondensation kettle, and the temperature is raised. When the temperature reaches 250°C, vacuuming is started, and the polycondensation reaction is carried out at a temperature below 60Pa for 120min. The temperature is controlled at 250°C-285°C. material, pelletized to obtain copolyester chip 2.

Embodiment 3

[0045] Put 2000kg of PTA, 25kg of IPA, 1002kg of EG, 0.1kg of cobalt acetate, 0.5kg of antimony trioxide and 0.24kg of trimethyl phosphate into the first esterification kettle, carry out esterification reaction at 250°C, and dehydrate 432L Afterwards, introduce the second esterification tank and lower the temperature to 240°C, add 253kg of EG, stir for 10min, mix the solution evenly, add 1000L of SIPE solution, react at 240°C for 90min, and collect 600kg of EG in total. The reaction mixture is introduced into the polycondensation kettle, and 170kg of succinic acid is quantitatively added to the polycondensation kettle, and the temperature is raised. When the temperature reaches 250°C, vacuuming is started, and the polycondensation reaction is carried out at a temperature below 60Pa for 180min. The temperature is controlled at 250°C-285°C. material, pelletized to obtain copolyester chip 3.

[0046] The physical indexes of copolyester chips 1-3 are shown in Table 1.

[0047] Ta...

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Abstract

The invention relates to a preparation method of normal pressure cation dyeable copolyester, comprising the following steps of: (1) carrying out esterification reaction to glycol, terephthalic acid and m-phthalic acid; (2) adding glycol, mixing uniformly, then adding SIPE solution and carrying out ester exchange reaction; and (3) adding aliphatic dibasic acid into mixture obtained after ester exchange reaction, uniformly mixing, then carrying out polycondensation reaction and preparing normal pressure cation dyeable copolyester, wherein the molar ratio of the terephthalic acid and m-phthalic acid is 50:1 to 90:1, the ratio of mole number of the aliphatic dibasic acid and the sum of the mole numbers of the terephthalic acid and m-phthalic acid is 0.05:1 to 0.15:1; the ratio of the mole number of the added glycol in the step (2) and the sum of the mole numbers of the terephthalic acid and m-phthalic acid is 0.1:1 to 0.5:1; the ratio of the sum of the mole numbers of the terephthalic acid, m-phthalic acid and the aliphatic dibasic acid and the mole number of the sulfonic acid group in SIPE solution is 9:1 to 28:1.

Description

technical field [0001] The invention relates to a preparation method of normal pressure 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 transesterified by dimethyl isophthalate-5-sodium sulfonate (hereinafter referred to as SIPM) and ethylene glycol. Obtain, because transesterification is the equilibrium reversible reaction, therefore the SIPE solution of gained is actually the mixed solution of SIPE, SIPM and methyl isophthalate hydroxyethyl ester-5-sodium sulfonate, and the total sulfonic acid groups in the solution are used for metering Group molar count. However, although the dyeing performance...

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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