Phosphorus-containing flame retardant monomer, halogen-free flame retardant polyester containing the same and preparation method thereof

A flame-retardant monomer and flame-retardant polyester technology, which is applied in the field of flame-retardant polyester manufacturing, can solve the problems of applications that cannot meet the strict requirements of crystallization performance, large molecular weight drop, and symmetrical structure destruction, so as to ensure the esterification reaction The effect of activity, high crystallization performance, and good overall performance

Active Publication Date: 2014-03-19
JIANGSU YUXING FILM TECH
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Problems solved by technology

[0005] From the practical application results, although the reactive flame retardant overcomes the above-mentioned shortcomings of the additive flame retardant, the symmetric structure of the prepared polyester is severely damaged due to the introduction of a large side group, resulting in a relatively low molecular weight drop

Method used

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  • Phosphorus-containing flame retardant monomer, halogen-free flame retardant polyester containing the same and preparation method thereof
  • Phosphorus-containing flame retardant monomer, halogen-free flame retardant polyester containing the same and preparation method thereof
  • Phosphorus-containing flame retardant monomer, halogen-free flame retardant polyester containing the same and preparation method thereof

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preparation example Construction

[0026] The preparation method of phosphorus-containing flame-retardant monomer of the present invention, carries out according to the following steps:

[0027] (1) Add 272ml of phosphorus oxychloride and 68g of pentaerythritol into the reactor. The reactor can be heated to 60°C with a mechanical stirrer, condenser, thermometer, and tail gas absorption device, reacted for 1 hour, and then heated Reflux until no HCl gas is released, filter after cooling to room temperature, wash and dry the resulting filter cake to obtain white solid pentaerythritol diphosphate diphosphoryl chloride, the present invention can wash the filter cake twice with toluene, and then use Washing with distilled water three times, and drying in vacuum to obtain pentaerythritol diphosphate diphosphoryl chloride, the yield can reach 83.4%.

[0028] ⑵, the pentaerythritol diphosphate diphosphoryl chloride of 297g, the toluene of 368g and the aluminum chloride AlCl of 293.7g 3 Add to the reactor, excess tolue...

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Abstract

The invention relates to a preparation method of halogen-free flame retardant polyester phosphorus containing a phosphorus-containing flame retardant monomer. The preparation method includes: according to a mass ratio, adding 100 parts of terephthalic acid, 3.6-15.2 parts of the phosphorus-containing flame retardant monomer, 46.3-54.7 parts of ethylene glycol, 0.035-0.062 part of a catalyst and 0.008-0.015 part of a heat stabilizer into a synthesis reaction kettle, and carrying out a conventional polyester synthesis process to prepare the halogen-free flame retardant polyester with a phosphorus content of 0.8-1.5wt% and an intrinsic viscosity number of 0.63-0.69dL g<-1>. The halogen-free flame retardant polyester provided by the invention has the characteristics of high structural regularity, high degree of crystallinity, and high melting point.

Description

technical field [0001] The invention relates to a phosphorus-containing flame-retardant monomer, a halogen-free flame-retardant polyester containing the monomer and a preparation method thereof, and belongs to the technical field of flame-retardant polyester manufacture. Background technique [0002] Polyethylene terephthalate (PET) has the advantages of high modulus, high strength and elasticity, acid resistance and heat resistance, and has become the largest and most widely used fiber variety in synthetic fibers. Since the 1990s, the polyester and polyester fiber industry has developed rapidly, and my country has become the world's largest producer of polyester. However, due to the flammability of polyester, it is easy to catch fire and cause huge losses to people's lives and property safety, thus limiting its application in some fields. Therefore, the research on flame retardant polyester has always been a hot spot in polyester research, which is of great significance to...

Claims

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Application Information

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IPC IPC(8): C07F9/6574C08G63/692
Inventor 蒙钊王继伟张兴宏闵玉勤徐莹磊夏毅杜滨阳徐君庭
Owner JIANGSU YUXING FILM TECH
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