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Polyester emulsion slurry and preparation method thereof

A polyester emulsion size, room temperature technology, used in fiber types, textiles and papermaking, fiber processing, etc., can solve the problems of high glass transition temperature and difficult to improve the hardness and brittleness of starch sizing films, and achieve good flexibility, elasticity, adhesion, etc. Good sex, the effect of reducing the rate of broken ends

Active Publication Date: 2016-04-06
SICHUAN ZHUKANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the sizing requirements of existing polyester-cotton blended yarns or pure cotton yarns, and the high glass transition temperature of existing WPET sizing, which is difficult to improve the hardness and brittleness of starch size films, the invention provides a polyester emulsion size ( PET emulsion) and its preparation process, suitable for mixing with starch or modified starch to sizing polyester-cotton blended yarn or pure cotton yarn

Method used

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  • Polyester emulsion slurry and preparation method thereof
  • Polyester emulsion slurry and preparation method thereof
  • Polyester emulsion slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the present embodiment, the polyester emulsion slurry is prepared in the polyester pilot test reactor as follows:

[0028] (1) Esterification: 60.19mol of purified terephthalic acid, 4.82mol of isophthalic acid, 3.73mol of sodium isophthalic acid-5-sulfonate, 27.37mol of 1,6-adipic acid, and 136.95mol of ethylene glycol , PEG-6000.5kg, 50g of catalyst monobutyltin oxide, and 40g of antioxidant 1010 were put into the pilot test reactor, stirred and mixed evenly, nitrogen was blown and the temperature was raised slowly, and the top temperature of the reflux condenser was controlled not to exceed 103°C. The reaction system When the temperature rises to 240-245°C, keep warm for esterification for 4-6 hours, until the theoretical effluent value of 3.5kg (192.22mol) is reached and the top temperature of the reflux condenser is not higher than 50°C to obtain a copolyester compound.

[0029] (2) Polycondensation: The temperature of the reaction system is lowered to 220°C±5, ...

Embodiment 2

[0033] (1) Esterification: 66.21mol of purified terephthalic acid, 4.75mol of isophthalic acid, 3.9mol of sodium isophthalic acid-5-sulfonate, 25.83mol of 1,8-suberic acid, and 136.95mol of ethylene glycol , PEG-10000.3kg, 50g of catalyst monobutyltin oxide and 40g of antioxidant 1010 were put into the pilot test reactor, stirred and mixed evenly, nitrogen was blown and the temperature was raised slowly, and the top temperature of the reflux condenser was controlled not to be higher than 103°C. The temperature of the reaction system When the temperature rises to 240°C, keep warm and esterify for 4-6 hours, until the theoretical effluent value of 3.6kg (201.18mol) is reached and the top temperature of the reflux condenser is not higher than 50°C to obtain a copolyester compound.

[0034] (2) Polycondensation: The temperature of the reaction system is lowered to 220°C±5, the nitrogen pipe is closed, and the polycondensation reaction is carried out under an absolute pressure of 10...

Embodiment 3

[0038](1) Esterification: 54.17mol of purified terephthalic acid, 9.03mol of isophthalic acid, 3.73mol of sodium isophthalic acid-5-sulfonate, 31.5mol of 1,6-adipic acid, and 128.89mol of ethylene glycol , put 50g of catalyst dibutyltin oxide and 40g of antioxidant 1010 into the reaction kettle, stir and mix evenly, blow nitrogen and slowly raise the temperature, control the top temperature of the reflux condenser to not be higher than 103°C, and keep warm when the temperature of the reaction system rises to 240°C After 4-6 hours, until the theoretical water output value is 3.5kg (195.44mol) and the top temperature of the reflux condenser is not higher than 50°C, a copolyester compound is obtained.

[0039] (2) Polycondensation: The temperature of the reaction system is lowered to 220°C±5, the nitrogen pipe is closed, and the polycondensation reaction is carried out under an absolute pressure of 100 Pa and vacuum for 3-5 hours to obtain a WPET melt.

[0040] (3) Emulsification...

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Abstract

The invention discloses polyester emulsion slurry which is prepared from, by molar content, purified terephthalic acid, isophthalic acid, isophthalic acid-5-sodium sulfonate, aliphatic dicarboxylic acid, ethylene glycol and polyethylene glycol PEG, and the total molar weight ratio of carboxylic acid to dihydric alcohol is (1:1.2)-(1:1.4). The PET emulsion polyester glass transition temperature ranges from -10 DEG C to 0 DEG C and is much lower than that of slurry in the prior art. The slurry is soft and not adhesive on yarn and is better in softness and elasticity and good in adhesion. The slurry can be used for polyester cotton blending and pure cotton yarn sizing after being mixed with starch or modified starch, the end breakage rate can be greatly reduced, and efficiency of a loom is improved.

Description

technical field [0001] The invention relates to a polyester textile size, in particular to a soft polyester emulsion size used for sizing polyester-cotton blended yarns and pure cotton yarns and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] The ideal warp yarn size should have sufficient adhesion to the sizing fibers, enhance the cohesion between fibers in the yarn and fit the hairiness, increase the strength of the warp yarn, improve wear resistance, and maintain the breaking elongation of the yarn. Long, thus improving the sizing effect and weaving efficiency. The main varieties of warp yarn size are modified starch, polyvinyl alcohol (PVA), and acrylic acid copolymer (PA). Among them, the biodegradability of PVA size is very poor, and it has become an irreversible trend to use no or less PVA in the development of textile size; PA's "soft, sticky, hard and brittle" and hygroscopic sticky properties limit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/672C08G63/85D06M15/507D06M15/11D06M101/32D06M101/06
CPCC08G63/672C08G63/6886C08G63/85D06M15/11D06M15/5075D06M2101/06D06M2101/32
Inventor 胡晓朱谱新赵春程飞
Owner SICHUAN ZHUKANG NEW MATERIAL CO LTD
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