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Polyester-cotton one-bath soaping agent and preparation method and application thereof

The technology of soaping agent and polyester-cotton is applied in the field of polyester-cotton one-bath soaping agent and its preparation, which can solve the problems of complicated process and high energy consumption, and achieve the effects of improving dyeing efficiency, reducing COD content and low COD value.

Inactive Publication Date: 2019-07-09
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a polyester-cotton one-bath soaping agent and its preparation method and application, in order to solve the defect in the prior art that the dyeing of polyester-cotton blended fabrics is complicated and energy-intensive due to the two-bath method

Method used

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  • Polyester-cotton one-bath soaping agent and preparation method and application thereof

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preparation example Construction

[0030] A kind of preparation method of polyester-cotton one-bath soaping agent, is used for making described polyester-cotton one-bath soaping agent, or comprises the following steps:

[0031] S1. Mix terephthalic acid, isophthalic acid, biphenyltetracarboxylic dianhydride, ethylene glycol, diethylene glycol, and triethylene glycol under inert gas, 200-280°C, and gauge pressure 0-0.05Mpa Carry out esterification reaction; S2, when the esterification rate reaches or exceeds 90%, release to normal pressure, add m-benzene sulfonate, polycondensation catalyst, stabilizer; S3, gradually depressurize and cool the reaction system, the temperature is at 180 The polycondensation reaction is carried out at -250°C and the vacuum degree is 0.07-0.096Mpa to prepare the polyester-cotton one-bath soaping agent.

[0032]A preparation method of a polyester-cotton one-bath soaping agent, used for making the polyester-cotton one-bath soaping agent, or comprising the following steps: S11, mixing ...

Embodiment 1

[0046] In a 250mL four-necked flask equipped with an oil bath jacket, a stirrer, a gas inlet, and a rectifying column, add 132g of isophthalic acid, 398g of terephthalic acid, 30g of biphenyltetracarboxylic dianhydride, and ethylene glycol in sequence. 80g, diethylene glycol 200g, triethylene glycol 45g. Pressurize after replacing with nitrogen for several times, use the valve on the top of the fractionating column to adjust the pressure in the flask to 0-0.05Mpa (gauge pressure), stir at 65rpm, heat up to 200-280°C, and carry out the esterification reaction. When the water output reaches 120g, release the pressure and end the esterification, then add 90g of sodium isophthalic acid-5-sulfonate, 0.4g of antimony trioxide, and 0.4g of phosphoric acid, lower the temperature and reduce the pressure, and adjust the stirring speed to 40-55rpm , carry out polycondensation reaction under the conditions of 180-250 DEG C and vacuum degree of 0.07-0.096Mpa to prepare the polyester-cotton...

Embodiment 2

[0048] In a 250mL four-necked flask equipped with an oil bath jacket, a stirrer, a gas inlet, and a rectifying column, 132g of isophthalic acid, 398g of terephthalic acid, 33g of biphenyltetracarboxylic acid, 80g of ethylene glycol, and 200 g of diethylene glycol, 45 g of triethylene glycol, 90 g of sodium isophthalic acid-5-sulfonate, 0.4 g of antimony trioxide, and 0.4 g of phosphoric acid. Pressurize after replacing with nitrogen for several times, use the valve on the top of the fractionating column to adjust the pressure in the flask to 0-0.05Mpa (gauge pressure), stir at 65rpm, heat up to 200-280°C, and carry out the esterification reaction. When the water output reaches 120g, the pressure is released, the esterification is completed, then the temperature is reduced and the pressure is reduced, the stirring speed is adjusted to 40-55rpm, and the polycondensation reaction is carried out at 180-250°C and the vacuum degree is 0.07-0.096Mpa, and the described Polyester one b...

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Abstract

The invention relates to the field of soaping agents and relates to a polyester-cotton one-bath soaping agent and a preparation method and application thereof. The polyester-cotton one-bath soaping agent is prepared from one or more of a dibasic acid, a dibasic alcohol, an isophthalic sulfonate, a polycondensation catalyst, a stabilizer and an ester exchange catalyst, wherein a ratio of the totalmolar quantity of the dibasic acid to the total molar quantity of the dibasic alcohol is 1:1.1 to 1:2. The isophthalic sulfonate accounts for 10-18% of total weight of the polyester-cotton one-bath soaping agent; each of one or more of the stabilizer, the polycondensation catalyst and the ester exchange catalyst accounts for 0.025-0.1% of the total weight of the polyester-cotton one-bath soaping agent. The defect of the prior art is effectively overcome that the use of two-bath process in the dyeing of polyester-cotton blended fabrics causes high energy consumption to the process; the polyester-cotton blended fabrics can be dyed more efficiently.

Description

technical field [0001] The invention relates to the technical field of soaping agents, more specifically, to a one-bath soaping agent for polyester and cotton, its preparation method and application. Background technique [0002] The dyeing of polyester-cotton blended fabrics has long been a two-bath dyeing process (including pre-dyeing treatment, polyester dyeing with disperse dyes, reduction cleaning, water washing, reactive dye over-dyeing cotton and water washing steps), that is, first at high temperature (130 ℃) Dye polyester fibers with disperse dyes, after reduction cleaning, then dye cotton fibers with reactive dyes at room temperature (below 60 ℃). The traditional process includes pre-dyeing treatment, polyester dyeing with disperse dyes, reduction cleaning, water washing, over-dyeing cotton with reactive dyes, and water washing steps. Because of the complicated procedures and long processing time (12 hours), the production efficiency is low. Reactive dyes have bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P5/08C08G63/688C08G63/86
CPCC08G63/6886C08G63/866D06P5/08
Inventor 李峥嵘王康康黄钢王俊华曾显华
Owner WUYI UNIV
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