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Preparation method of hydrophilic flame-retardant polyester slice added with renewable microcrystalline cellulose

A technology of microcrystalline cellulose and flame retardant polyester, which is applied in the field of polyester modification, can solve the problems of poor hydrophilicity and poor flame retardancy of PET polyester, improve the flame retardant effect, improve the phenomenon of melting and dripping, heat The effect of performance improvement

Active Publication Date: 2015-02-25
太仓逸枫化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention needs to overcome the technical problems of poor hydrophilicity and flame retardancy of PET polyester, and provide a method for improving the hydrophilicity and flame retardancy of polyester by adding microcrystalline cellulose and flame retardant additives in the polymerization process

Method used

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  • Preparation method of hydrophilic flame-retardant polyester slice added with renewable microcrystalline cellulose

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Experimental program
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Effect test

Embodiment 2

[0027] 1) The molar ratio of the total amount of ethylene glycol and the total amount of terephthalic acid is 1.5:1; this step puts no less than 70% of the total amount of ethylene glycol and the total amount of terephthalic acid into the beating kettle Make a mixed slurry;

[0028] 2) Put 10% ethylene glycol and a catalyst into a catalyst preparation kettle, stir evenly to make a catalyst solution, the catalyst is antimony acetate, and its consumption is 500ppm of the total mass of terephthalic acid;

[0029] 3) adding microcrystalline cellulose of 5% by terephthalic acid mass, 5% ammonium polyphosphate (according to terephthalic acid mass) to the remaining ethylene glycol, and dispersing by ultrasonic waves to obtain additive suspension; The particle size of the microcrystalline cellulose is 0.5-2 μm;

[0030] 4) Pour the mixed slurry and catalyst liquid into the first esterification kettle, and heat for esterification. The esterification reaction temperature in this exampl...

Embodiment 3

[0036] 1) The molar ratio of the total amount of ethylene glycol to the total amount of terephthalic acid is 1.6:1; this step puts no less than 70% of the total amount of ethylene glycol and the total amount of terephthalic acid into the beating kettle Make a mixed slurry;

[0037] 2) Put 10% ethylene glycol and a catalyst into a catalyst preparation kettle, stir evenly to make a catalyst solution, the catalyst is antimony acetate, and its consumption is 500ppm of the total mass of terephthalic acid;

[0038] 3) Add microcrystalline cellulose with 7% terephthalic acid mass, 5% ammonium polyphosphate (terephthalic acid mass) into the remaining ethylene glycol, and disperse with ultrasonic waves to prepare additive suspension; The particle size of the microcrystalline cellulose is 0.5-2 μm;

[0039] 4) Pour the mixed slurry and catalyst liquid into the first esterification kettle, and heat for esterification. The esterification reaction temperature in this example is 245° C., and...

Embodiment 4

[0045] Add the microcrystalline cellulose into the aqueous solution of the surface treatment agent and stir evenly, soak for 12 hours, centrifuge and wash with deionized water to make the pH neutral. Produced surface-treated microcrystalline cellulose. The surface treatment agent is an alkaline solution, preferably a NaOH solution.

[0046] 1) The molar ratio of the total amount of ethylene glycol and the total amount of terephthalic acid is 1.5:1; this step puts no less than 70% of the total amount of ethylene glycol and the total amount of terephthalic acid into the beating kettle Make a mixed slurry;

[0047] 2) Put 10% ethylene glycol and a catalyst into a catalyst preparation kettle, stir evenly to make a catalyst solution, the catalyst is antimony acetate, and its consumption is 500ppm of the total mass of terephthalic acid;

[0048] 3) The above-mentioned alkali-treated microcrystalline cellulose according to the mass of terephthalic acid 7%, and 5% ammonium polyphosp...

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Abstract

The invention relates to a preparation method of a hydrophilic flame-retardant polyester slice added with renewable microcrystalline cellulose. The technical problems of poor hydrophilcity and poor flame retardancy of PET polyester are required to be overcome. A preparation method comprises the following steps: 1) with the molar ratio of the total amount of ethylene glycol to the total amount of terephthalic acid of 1.2-1.6:1; putting ethylene glycol with the amount of not less than 70% of the total amount of ethylene glycol and the whole amount of terephthalic acid into a pulping kettle, and preparing a mixed slurry; 2) preparing a catalyst liquid from ethylene glycol with the amount of 5%-10% of the total amount of ethylene glycol and a catalyst; 3) preparing an additive suspension from microcrystalline cellulose, a flame retardant and the remaining amount of ethylene glycol; 4) carrying out heating esterification on the mixed slurry and the catalyst liquid to obtain an esterified material; 5) adding the additive suspension, and carrying out a second esterification reaction; 6) preparing a pre-polycondensation product; and 7) preparing a melt from the pre-polycondensation product, cooling, discharging, and carrying out grain-sized dicing.

Description

technical field [0001] The invention relates to a method for preparing polyester chips, in particular to a method for preparing hydrophilic flame-retardant polyester chips modified by adding renewable microcrystalline cellulose, and belongs to the field of polyester modification. Background technique [0002] The molecular structure of PET polyester is highly regular, the molecular arrangement is tight, and the molecular chain segment contains a rigid benzene ring structure, so PET has good physical and mechanical properties. PET polyester has high crystallinity, and the fiber after spinning has good shape retention, crispness, easy washing and quick drying, etc., so it is widely used in the field of clothing. However, PET polyester fiber has poor hygroscopicity. When it is used as a material for personal wear, it is difficult to absorb moisture and perspire, which affects the comfort of wearing. It is easy to generate static electricity and is flammable. Since the molecula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/86C08L67/02C08L1/02C08K3/32
Inventor 胡舒龙纪国营徐锦龙
Owner 太仓逸枫化纤有限公司
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