Combustion inhibitor and preparing method and flame-proof acrylic fibre using the same

A technology of flame retardant, ethylacrylamide phosphorothioate, which is applied in the field of flame retardant acrylic fiber, can solve the problem of copolymer heat resistance, weather resistance, dyeability and dimensional stability, affect the use effect and popularize the application , application prospect constraints and other issues, to achieve the effect of easy industrial production, wide application range, and durable flame retardancy

Inactive Publication Date: 2008-01-30
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the copolymerization method has the following defects: it is necessary to change the original polymerization and spinning production process of conventional acrylic fiber spinning; when using inorganic solvent spinning, the content of flame retardant monomer in the polyacrylonitrile copolymer is generally required to be ≤25wt %, and such a content is difficult to meet the requirements of flame retardancy, such as the copolymer of vinyl chloride or vinylidene chloride and acrylonitrile requires the content of vinyl chloride or vinylidene chloride to be above 40wt%; when organic solvent is used as spinning solvent, although it can Increase the content of the flame retardant comonomer to more than 40wt%, but i

Method used

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  • Combustion inhibitor and preparing method and flame-proof acrylic fibre using the same
  • Combustion inhibitor and preparing method and flame-proof acrylic fibre using the same
  • Combustion inhibitor and preparing method and flame-proof acrylic fibre using the same

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preparation example Construction

[0038] The preparation method of the flame-retardant acrylic fiber of the present invention is based on the mass percentage formula of the flame-retardant acrylic fiber of the present invention, and the following process is adopted: first, 1.6% to 2.4% of the amount of acrylonitrile is mixed with sodium bisulfite and 1% of the amount of acrylonitrile 3.7-6.8% sodium lauryl sulfate is put into distilled water which is 5-10 times of the total amount of sodium bisulfite and sodium lauryl sulfate, after dissolving, pour it into an autoclave washed with distilled water ; Mix and stir the four kinds of comonomers according to the proportion of the formula of the present invention, and then pour them into the reactor; In the reaction kettle; feed nitrogen to drive off the air in the reaction kettle, close the reaction kettle; start the stirring device to stir for 5-10 minutes, and react at a temperature of 40-65°C for 0.5-1 hour, then stop the reaction; move the reaction product into ...

Embodiment 1

[0043] Synthetic flame retardant.

[0044] Dissolve the newly distilled 0.5mol N-methylolacrylamide in 250ml of dry ether and pour it into a 500ml four-neck reaction flask equipped with a constant pressure dropping funnel, a reflux condenser and a magnetic stirrer, and Add 0.52 mol of distilled triethylamine, start the magnetic stirrer, keep the reaction temperature at 0°C, then drop 0.5 mol of distilled O, O-dimethylphosphorous thio into the reaction flask through the constant pressure dropping funnel Acyl chloride, control the drop within 6h; then stop the reaction after reacting at room temperature for 48h, filter to remove triethylamine hydrochloride, wash the filtrate with 5% aqueous sodium hydroxide solution, then wash with distilled water, and distill off ether and water, and then dried with anhydrous magnesium sulfate, the O, O-dimethyl-O-methacrylamido phosphorothioate can be obtained; the yield is 85%.

Embodiment 2

[0046] Synthetic flame retardant.

[0047] The N-methylolacrylamide in Example 1 is replaced by N-Hydroxyethylacrylamide, the synthesis process is the same as in Example 1, and O, O-dimethyl-O-ethylacrylamide sulfur can be obtained Phosphate generation; yield 83.5%.

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Abstract

The invention relates to a flame retardant, a preparation method and purposes thereof. The flame retardant is called O-alkyl acrylamide dialkyl thiophosphate. The preparation method is that: 1mol new distilled N- hydroxyalkyl acrylamide is dissolved in 500ml dry aether and poured into a 1000ml four-neck reaction flask with a constant pressure funnel, a refluxing condensing tube and a magnetic stirrer, and 1.05mol distilled triethylamine is added, and the reaction temperature is kept at 0-50 DEG C, then 1mol distilled sulfur dialkyl phosphoryl chloride is dripped into the reaction flask through the constant pressure funnel and the time of dripping is controlled for 1-6h; reaction is kept for 10-48 hours under room temperature, then the reaction is stopped and filtration is made to take out triethylamine hydrochloride, the filtrate is washed with 5 percent sodium hydroxide solution, then is washed with distilled water, and distillation is carried out to remove the aether and water, finally drying is carried out with anhydrous magnesium sulfate so as to obtain the O-alkyl acrylamide dialkyl thiophosphate. The flame retardant of the invention is particularly applicable to be used as a comonomer to prepare flame retardant Orlon.

Description

technical field [0001] The present invention relates to a kind of flame retardant and its preparation method technology, especially a kind of technology of using the flame retardant to prepare non-additive flame retardant acrylic fiber. The international patent main classification number is proposed to be Int.Cl.C08L 101 / 00 2006.01). Background technique [0002] At present, many foreign industries and fields have quite strict flame-retardant requirements for fiber fabrics, such as interiors, carpets, curtains, wall coverings, etc. Protective clothing used in industries such as baby clothes, clothing for the elderly, bed sheets for hospital beds, and firefighting clothing must also be made of flame-retardant fiber materials. Although the current domestic industry standards, laws and regulations in this area are not yet perfect, with the development of the national economy and the continuous improvement of people's living standards, people will gradually realize the necessit...

Claims

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Application Information

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IPC IPC(8): C08K5/521C08F220/44C08F2/44D01F1/07
Inventor 陆正鸣程博闻黄翔宇任元林严国良西鹏黄胜德李振环张金树康卫民
Owner CHINA PETROLEUM & CHEM CORP
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