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Preparation method of water-soluble intumescent flame retardant for acrylic fabric

An intumescent flame retardant and water-soluble technology, which is applied in the field of preparation of water-soluble intumescent flame retardants for acrylic fabrics, can solve the problems of large smoke generation, and achieve no organic pollution, high reaction yield, and safe raw materials stable effect

Inactive Publication Date: 2016-08-17
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the acrylic fibers that have been industrialized in the world are produced by the copolymerization method. Acrylic fiber is produced by this method. It has good flame retardancy. However, when it burns violently, it will generate a large amount of smoke and produce a large amount of harmful gases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] According to the molar ratio of phosphoric acid and triisopropanolamine 1:6, the amount of p-toluenesulfonic acid is 1% of the total mass of phosphoric acid and triisopropanolamine, m (toluene): m (phosphoric acid and alcohol amine) is 1.1:1 , weigh the medicine and add it to a 250mL four-necked bottle equipped with a thermometer, agitator, water separator and spherical condenser, stir, heat up, and start timing. After boiling and steaming, the water phase toluene was separated in the water separator and the toluene was refluxed. After 4 hours of reaction, the reaction was terminated. Distill the filtrate under reduced pressure at 125°C at a vacuum degree of 0.07 MPa or above to distill off unreacted phosphoric acid and water-carrying agent toluene (for recycling), and obtain the flame retardant intermediate product A as a light yellow viscous liquid substance.

[0016] According to the condition that the mass ratio of intermediate A to melamine is 15:1, weigh the drug,...

Embodiment 2

[0018] According to the molar ratio of phosphoric acid and triisopropanolamine 1:6, the amount of p-toluenesulfonic acid is 1% of the total mass of phosphoric acid and triisopropanolamine, m (toluene): m (phosphoric acid and alcohol amine) is 1.1:1 , weigh the medicine and add it to a 250mL four-necked bottle equipped with a thermometer, agitator, water separator and spherical condenser, stir, heat up, and start timing. After boiling and steaming, the water phase toluene was separated in the water separator and the toluene was refluxed. After 4 hours of reaction, the reaction was terminated. Distill the filtrate under reduced pressure at 125°C at a vacuum degree of 0.07 MPa or above to distill off unreacted phosphoric acid and water-carrying agent toluene (for recycling), and obtain the flame retardant intermediate product A as a light yellow viscous liquid substance.

[0019] According to the condition that the mass ratio of intermediate A to melamine is 10:1, weigh the drug,...

Embodiment 3

[0021] According to the molar ratio of phosphoric acid and triisopropanolamine 1:6, the amount of cation exchange resin is 8% of the total mass of phosphoric acid and triisopropanolamine, m (toluene): m (phosphoric acid and alcohol amine) is 0.9:1, Weigh the medicine and add it to a 250mL four-necked bottle equipped with a thermometer, stirrer, water separator and spherical condenser, stir, heat up, and start timing. In the state of boiling, azeotrope the water generated by the reaction with toluene After steaming, separate the water phase toluene in the water separator and reflux. After 3 hours of reaction, the reaction is terminated. Distill the filtrate under reduced pressure at 125°C at a vacuum degree of 0.07 MPa or above to distill off unreacted phosphoric acid and water-carrying agent toluene (for recycling), and obtain the flame retardant intermediate product A as a light yellow viscous liquid substance.

[0022] According to the condition that the mass ratio of interm...

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Abstract

The invention relates to a preparation method for a water-soluble intumescent flame retardant for acrylic fabric, and belongs to the technical field of synthesis. The synthesis process comprises the two steps: firstly, alkylol amine, phosphoric acid, a catalyst and a water-carrying agent are subjected to the azeotropic reaction to obtain alkylol amine phosphate; then, the alkylol amine phosphate and melamine being a salt-forming agent are subjected to salifying to obtain a liquid water-soluble intumescent flame retardant. The intumescent flame retardant prepared by the method is good in water solubility, convenient to use and excellent in acrylic flame retardant property, and belongs to an environment-friendly flame retardant which is non-poisonous, low-smoke and efficient. The synthesis process of the flame retardant is simple, raw materials are low in price and easy to obtain, the water-carrying agent can be recycled, the organic pollution is avoided, the production efficiency is high, the energy consumption is low, and the industrial implementation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of synthesis, and in particular relates to a preparation method of a water-soluble intumescent flame retardant for acrylic fabrics. Background technique [0002] The fluffy, curly and soft properties of polyacrylonitrile fiber (acrylic fiber) are similar to wool, and it has the feel and warmth similar to wool. In addition, acrylic fabrics are easy to wash and dry, easy to care for, and have light fastness, weather resistance, mold resistance, and excellent chemical stability. However, acrylic fiber is a flammable fiber, and its limiting oxygen index is the lowest among synthetic fibers, and it emits toxic cyanide when burned, so the flame retardant research of acrylic fiber is particularly important. [0003] At present, the existing preparation methods of flame-retardant acrylic fibers can be divided into copolymerization method, blending method, chemical modification method, finishing method, etc. accordi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/44D06M101/28
Inventor 丁斌刘群郝凤岭关昶李祥王海东
Owner JILIN INST OF CHEM TECH
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