Water-repellent canvas and preparation method thereof

A canvas and woven fabric technology, applied in the field of polyester fibers, can solve the problems of large amount of antimony catalysts and low peel strength, and achieve the effects of improving peel strength, good interfacial bonding and improving adhesive strength

Active Publication Date: 2019-05-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of the prior art that the peeling strength is not high and the amount of antimony-based catalysts is relatively large, and provide a water-repellent canvas with good peeling strength and its preparation method

Method used

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  • Water-repellent canvas and preparation method thereof
  • Water-repellent canvas and preparation method thereof
  • Water-repellent canvas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The preparation method of water-repellent canvas, the steps are as follows:

[0073] (1) prepare modified polyester;

[0074] (1.1) Preparation of 2,6,6-trimethyl-2,5 heptanediol;

[0075] (a) Mix potassium hydroxide aqueous solution and isobutanol at a ratio of 5:1 in a molar ratio of isobutanol to potassium hydroxide, and react for 4 hours at a temperature of 100° C. to obtain potassium isobutoxide. During the reaction, With stirring, the mass concentration of potassium hydroxide aqueous solution is 43%;

[0076] (b) After removing the impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide to xylene of 1.3:2.2, and cool to 1°C ;

[0077] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethylpropanal into the system of (b), react at a temperature of 25°C for 3 hours, then carry out cooling crystallization and centrifugation And dry to obtain octyne diol, when the ...

Embodiment 2

[0095] The preparation method of water-repellent canvas, the steps are as follows:

[0096] (1) prepare modified polyester;

[0097] (1.1) Preparation of 2,6,6-trimethyl-2,5 heptanediol;

[0098] (a) Mix potassium hydroxide aqueous solution and isobutanol at a ratio of 5.5:1 in a molar ratio of isobutanol to potassium hydroxide, and react for 5 hours at a temperature of 100° C. to prepare potassium isobutoxide. During the reaction, With stirring, the mass concentration of potassium hydroxide aqueous solution is 40%;

[0099] (b) After removing impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide and xylene of 1.3:2.0, and cool to 3°C ;

[0100] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethylpropanal into the system of (b), react at a temperature of 30°C for 3 hours, then carry out cooling crystallization and centrifugation And dry to obtain octyne diol, when the ...

Embodiment 3

[0114] The preparation method of water-repellent canvas, the steps are as follows:

[0115] (1) prepare modified polyester;

[0116] (1.1) Preparation of 2,6,6-trimethyl-5-ethyl-2,5-heptanediol;

[0117](a) Mix potassium hydroxide aqueous solution and isobutanol according to the ratio of isobutanol to potassium hydroxide molar ratio of 5:1, and react at a temperature of 105°C for 4.5h to obtain potassium isobutoxide. During the reaction Accompanied by stirring, the mass concentration of potassium hydroxide aqueous solution is 48%;

[0118] (b) After removing impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide to xylene of 1.5:2.5, and cool to 0°C ;

[0119] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethyl-3-pentanone into the system of (b), react at 30°C for 3 hours, and then carry out cooling crystallization , centrifugal separation and drying to obtain octyne d...

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Abstract

The invention relates to a water-repellent canvas and a preparation method thereof. The preparation method comprises the following steps: padding modified polyester industrial yarn woven cloth with awaterproof finishing agent, and coating a waterproof coating on the surface of the woven cloth, thereby obtaining the water-repellent canvas. The modified polyester industrial yarns are prepared by the following steps: performing solid phase polycondensation tackifying on modified polyester melt, melting, metering, extruding, cooling, oiling, stretching, heat setting and winding. The preparation method of the modified polyester before solid phase polycondensation tackifying comprises the following steps: uniformly mixing terephthalic acid, ethylene glycol, dihydric alcohol with a tert-butyl side group and doped and modified Sb2O3 powder, and sequentially carrying out an esterification reaction and a condensation polymerization reaction so as to prepare modified polyester. The peel strengthof the prepared product is more than or equal to 10N/cm, the usage temperature ranges from 30 DEG C below zero to 60 DEG C, the hydrostatic pressure resistance value is more than or equal to 100KPa,and the friction resistance number is more than or equal to 3000. The preparation method disclosed by the invention is simple in process, the addition amount of an antimony catalyst is reduced, and the cost is low; and the prepared product is high in peel strength and excellent in application prospects.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a water-repellent canvas and a preparation method thereof. Background technique [0002] Since the appearance of polyethylene terephthalate (PET) fiber, it has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fiber in the world. Because polyester fiber has a series of excellent properties such as high breaking strength, high elastic modulus, moderate resilience, excellent heat setting performance, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, and the fabric prepared by it has With the advantages of anti-wrinkle and good stiffness, it is widely used in many fields. In our country, polyester with a polyethylene terephthalate content of more than 85% is called polyester. Due to its excellent performance, polyester filament has become one of the fastest-growing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10D06M11/00D06M13/00D06M15/00C08G63/183D06N3/14D06N3/00D06M101/32
Inventor 王丽丽钮臧臧汤方明
Owner JIANGSU HENGLI CHEM FIBER
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