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Polyester flame-retardant canvas and preparation method thereof

A polyester flame retardant and canvas technology, applied in the field of modified polyester fibers, can solve the problems of low thermal shrinkage, low peel strength and high thermal shrinkage, and achieve the effect of eliminating shrinkage

Active Publication Date: 2019-05-07
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 low peel strength and high heat shrinkage rate of polyester flame-retardant canvas in the prior art, and provide a polyester flame-retardant canvas with high peel strength and low heat shrinkage rate and its preparation method

Method used

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  • Polyester flame-retardant canvas and preparation method thereof
  • Polyester flame-retardant canvas and preparation method thereof
  • Polyester flame-retardant canvas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The preparation method of polyester flame-retardant canvas, the steps are as follows:

[0068] (1) prepare modified polyester;

[0069] (1.1) Esterification reaction;

[0070] Make a slurry of terephthalic acid, ethylene glycol, 2-carboxyethylphenylphosphorous acid and 3-trimethylsilyl-1,2-propanediol with a molar ratio of 1:1.2:0.03:0.02, and add trioxide After diantimony, titanium dioxide and triphenyl phosphate are mixed evenly, pressurize in a nitrogen atmosphere to carry out esterification reaction. When reaching 95% of the theoretical value, it is the end point of the esterification reaction, and the additions of antimony trioxide, titanium dioxide and triphenyl phosphate are respectively 0.03wt%, 0.20wt% and 0.01wt% of the addition of terephthalic acid;

[0071] (1.2) polycondensation reaction;

[0072] After the esterification reaction is over, start the polycondensation reaction in the low vacuum stage under negative pressure conditions. The pressure in this...

Embodiment 2

[0083] The preparation method of polyester flame-retardant canvas, the steps are as follows:

[0084] (1) prepare modified polyester;

[0085] (1.1) Esterification reaction;

[0086] Make a slurry of terephthalic acid, ethylene glycol, 2-carboxyethylphenylphosphinic acid and 3-trimethylsilyl-1,2-propanediol with a molar ratio of 1:1.4:0.032:0.022, add ethylene di After the antimony alcohol, titanium dioxide and triphenyl phosphate are mixed evenly, carry out the esterification reaction under pressure in a nitrogen atmosphere. When reaching 95% of the theoretical value, it is the end point of the esterification reaction, and the additions of ethylene glycol antimony, titanium dioxide and triphenyl phosphate are respectively 0.035wt%, 0.22wt% and 0.02wt% of the terephthalic acid addition;

[0087] (1.2) polycondensation reaction;

[0088] After the esterification reaction is over, start the polycondensation reaction in the low vacuum stage under negative pressure conditions. ...

Embodiment 3

[0095] The preparation method of polyester flame-retardant canvas, the steps are as follows:

[0096] (1) prepare modified polyester;

[0097] (1.1) prepare the diol with trimethylsilyl side group;

[0098] (1.1.1) Mix 3-trimethylsilyl-3-methylpropene, peracetic acid and dichloromethane at a molar ratio of 1:5:10, and react at a temperature of 35°C for 5 hours with stirring , the solvent is removed after the reaction, and trimethylsilylpropylene epoxide is obtained through purification and refinement;

[0099] (1.1.2) Mix water, concentrated sulfuric acid and trimethylsilyl propylene epoxide, heat it in a water bath to 80°C under stirring conditions, keep it warm for 10 minutes, cool to room temperature after the reaction, neutralize, distill, separate and purify Obtain the glycol of the band trimethylsilyl side group shown in formula (I), R in formula (I) is-CH(CH 3 )-, concentrated sulfuric acid is the sulfuric acid that mass concentration is 70%, when reaction starts, th...

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Abstract

The invention relates to polyester flame-retardant canvas and a preparation method thereof. The preparation method comprises the steps that the surface of a modified polyester industrial silk fabricis calendered and attached to a PVC film to prepare the polyester flame-retardant canvas; a modified polyester industrial fibre is prepared by carrying out solid-phase polycondensation and tackifying,melting, metering, extruding, cooling, oiling, stretching, heat setting, relaxation heat treatment and winding on a modified polyester melt; the preparation method of solid-phase polycondensation andtackifying pre-modified polyester comprises the following steps that terephthalic acid, ethylene glycol, dihydric alcohol with trimethylsilyl side group and 2-carboxylic ethyl phenyl hypophosphorousacid are uniformly mixed and then subjected to an esterification reaction and a polymerization reaction; and the relaxation heat treatment refers to the process that a modified polyester fibre bundlepasses through a space with the temperature of 200-240 DEG C under the state that the overfeeding rate of winding is 3.0 -5.0%. The preparation method is simple in process, and low in cost; and the mechanical property of a prepared product is excellent, the bonding strength is 50-60 N / cm, and the peel strength is greater than or equal to 8.5 N / cm.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to a polyester flame-retardant canvas and a preparation method thereof. Background technique [0002] Since its appearance, ethylene terephthalate (PET) fiber has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fibers 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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IPC IPC(8): B29C48/92B29C55/00B29C70/28B29C70/54B29C63/02B32B27/08B32B27/36B32B27/30C08G63/695
Inventor 杨超明王山水汤方明
Owner JIANGSU HENGLI CHEM FIBER
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