Polyester heat-resistant canvas and preparation method thereof

A heat-resistant, canvas technology, applied in the field of polyester fibers, can solve the problem of low strength, and achieve the effects of increasing strength, increasing free volume of voids, and good interface bonding

Active Publication Date: 2019-05-14
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect of low strength in the prior art, to provide a kind of polyester heat-resistant canvas with good strength and its preparation method

Method used

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  • Polyester heat-resistant canvas and preparation method thereof
  • Polyester heat-resistant canvas and preparation method thereof
  • Polyester heat-resistant canvas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The preparation method of polyester heat-resistant canvas, the steps are as follows:

[0069] (1) prepare modified polyester;

[0070] (1.1) Preparation of 2,6,6-trimethyl-2,5 heptanediol;

[0071] (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%;

[0072] (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 ;

[0073] (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, ...

Embodiment 2

[0089] The preparation method of polyester heat-resistant canvas, the steps are as follows:

[0090] (1) prepare modified polyester;

[0091] (1.1) Preparation of 2,6,6-trimethyl-2,5 heptanediol;

[0092] (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%;

[0093] (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 ;

[0094] (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, ...

Embodiment 3

[0104] The preparation method of polyester heat-resistant canvas, the steps are as follows:

[0105] (1) prepare modified polyester;

[0106] (1.1) Preparation of 2,6,6-trimethyl-5-ethyl-2,5-heptanediol;

[0107] (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%;

[0108] (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 ;

[0109] (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 obtai...

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Abstract

The invention relates to polyester heat-resistant canvas and a preparation method thereof. The preparation method comprises the steps that after modified polyester industrial yarn weaving cloth is padded with RFL impregnation liquid, a rubber layer is calendered on the surface of the modified polyester industrial yarn weaving cloth, then vulcanizing is conducted, and thus the polyester heat-resistant canvas is prepared; the modified polyester industrial yarn is prepared from a modified polyester melt through solid-phase polycondensation viscosity increasing, melting, metering, extruding, cooling, oiling, stretching, thermal shaping and winding; and a preparation method of modified polyester before solid-phase polycondensation viscosity increasing comprises the steps that terephthalic acid,ethylene glycol, dihydric alcohol with a trimethylsilyl pendant group, and dihydric alcohol with a tert-butyl pendant group are mixed evenly and then subjected to esterification reaction and polycondensation reaction successively; and the peeling grade of a prepared product is five, the use temperature range is minus 50 DEG C to plus 150 DEG C, the tear strength is greater than or equal to 7.0 N/mm, and the bonding strength is greater than or equal to 7.0 N/mm. The preparation method is simple in technology and low in cost; and the prepared product is high in bonding strength and good in application prospect.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a polyester heat-resistant 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-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/695D06M15/41B32B25/10B32B27/02B32B27/36D06M101/32
Inventor 杨超明康爱旗王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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