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Preparation of flame-retardant polyester for preparing industrial fibre

A flame retardant polyester, industrial technology, applied in the field of preparation of flame retardant polyester, to achieve the effect of reducing the mechanical properties and improving

Active Publication Date: 2011-04-06
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for preparing flame-retardant polyester for industrial fibers. The technical problem to be solved is to reduce the deviation between the prepared flame-retardant polyester and conventional polyester in thermal transition performance, thereby overcoming Defects in the existing technology, at the same time, the technical measures required to solve the above technical problems will not adversely affect the manufacture of flame-retardant polyester industrial fibers or the performance of the produced products

Method used

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  • Preparation of flame-retardant polyester for preparing industrial fibre
  • Preparation of flame-retardant polyester for preparing industrial fibre
  • Preparation of flame-retardant polyester for preparing industrial fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0028] 1. Esterification process:

[0029] Monomer terephthalic acid and ethylene glycol undergo esterification reaction, and the molar ratio of monomer feeding is controlled as terephthalic acid: ethylene glycol = 100: 110-200.

[0030]The method of adding nano-kaolin is selected before the esterification reaction. When the esterification raw materials are beaten and mixed, the required amount of nano-kaolin particles is added to it. The average particle size of the nano-kaolin particles is 200-500nm. The specific feeding amount of nano-kaolin particles in each embodiment is determined according to the content of nano-kaolin in the flame-retardant polyester product, and the content of nano-kaolin in the flame-retardant polyester product in each embodiment is shown in Table 1.

[0031] The reaction temperature is controlled at 260-280° C., the reaction pressure is controlled at 100-300 kPa, and the residence time of the reactants is controlled at 1.5-4 hours.

[0032] 2. Prec...

Embodiment 5～8

[0040] The method of adding nano-kaolin is changed to adding before the polycondensation reaction. First, the nano-kaolin particles, pentaerythritol and reactive flame retardant are beaten and mixed with ethylene glycol as a solvent to prepare a slurry with a total concentration of 20-45wt%. It is then added to the reaction system through the oligomer line. All the other are with embodiment 1~4.

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Abstract

A method for preparing flame-retardant polyester for manufacturing industrial fiber comprises the following steps: 1) carrying out the esterification of monomer terephthalic acid and ethylene glycol; and 2) adding pentaerythritol ester and a reactive flame retardant having a structural formula I, and sequentially carrying out the pre-polymerization reaction and the polycondensation reaction in the presence of a polycondensation catalyst to obtain the polycondensation product, that is, the flame-retardant polyester, wherein R in the structural formula I is hydroxyalkyl or carboxyalkyl of C1 toC4. Nano kaolin particles which serve as a flame-retardant polyester crystallization nucleating agent are added to the reaction system, wherein the average particle diameter thereof is 200 to 600 nm,the nano kaolin particles are added before the esterification or before the pre-polymerization reaction, and the adding amount by the content of the nano kaolin particles existing in the polycondensation products at the end is 0.06 wt% to 1.0 wt%. The deviation of the thermal transformation performance existing between the conventional polyester and the prepared flame-retardant polyester is obviously reduced, so that the conventional polyester fiber manufacturing equipment and the manufacturing process thereof can be adopted to reliably manufacture the flame-retardant industrial fiber.

Description

technical field [0001] The invention relates to a preparation method of flame-retardant polyester, in particular to a preparation method of flame-retardant polyester containing phosphorus-based organic reactive flame retardant used for manufacturing industrial fibers. Background technique [0002] Polyester with flame-retardant properties has developed rapidly in recent years. The application fields of products involve civil and industrial applications. Among them, flame-retardant polyester fibers are the most widely used, especially industrial polyester fibers whose consumption is growing continuously. The flame retardancy has gradually become its basic performance requirement. The flame retardants used in flame retardant polyester mainly include three types: additive type, copolymerization type and finishing type. Relatively speaking, the flame retardant polyester of copolymerization type is linked to the macromolecular chain of polyester. Therefore, the flame retardant p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F1/07C08G63/86C08K5/5313C08G63/78D01F6/62C08L67/03C08G63/183C08K3/34
Inventor 林菘王鸣义郁培龄吴以准瞿中凯郭永林张晓静
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD