Preparation of flame-retardant polyester for preparing industrial yarn

A flame-retardant polyester and manufacturing industry technology, which is applied in the field of preparation of flame-retardant polyester to achieve the effect of decreasing and improving mechanical properties

Active Publication Date: 2009-03-04
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The invention provides a preparation method of flame-retardant polyester for manufacturing 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 products produced

Method used

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

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Experimental program
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Embodiment 1～4

[0028] 1. Esterification process:

[0029] The monomer terephthalic acid, ethylene glycol, pentaerythritol and the reactive flame retardant undergo esterification reaction, and the reactive flame retardant is a compound with the following structural formula:

[0030]

[0031] The feeding ratio of raw materials is controlled respectively as follows:

[0032] In molar ratio, terephthalic acid: ethylene glycol=100:110~200;

[0033]In terms of weight ratio, terephthalic acid: pentaerythritol=100:0.01~0.12, specific data and content of pentaerythritol in flame-retardant polyester products are shown in Table 1;

[0034] In terms of weight ratio, terephthalic acid: reactive flame retardant = 100: 1.40-7.50, see Table 1 for specific data and flame retardant content in flame-retardant polyester products.

[0035] The way of adding nano-kaolin is selected before the esterification reaction. When the raw materials are beaten and mixed before the esterification reaction, the require...

Embodiment 5～8

[0042] The method of adding nano-kaolin is changed to adding before the polycondensation reaction. Firstly, nano-kaolin particles are beaten and mixed with ethylene glycol to prepare a slurry with a concentration of 20-45 wt%, and then added to the reaction system through the oligomer pipeline. 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 (TPA), ethylene glycol, pentaerythritol ester and a reactive flame-retardant having a structural formula I, wherein R in the structural formula I is hydroxyalkyl or carboxyalkyl of C1 to C4; and 2) sequentially carrying out the pre-polymerization reaction and the polycondensation reaction of the esterification products in the presence of a polycondensation catalyst to obtain the esterification product, that is, the flame-retardant polyester. Nano kaolin particles which serve as a flame-retardant polyester crystallization nucleating agent are added to the reaction system, wherein 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 reaction type and finishing type. Therefore, the flame retardant performance is more stable and long-lasting. Phosphorus-based reactive flame retardants have excellent flame retardant ...

Claims

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Application Information

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IPC IPC(8): C08G63/46C08G63/183C08G63/78C08K5/5317D01F6/62D01F1/07C08K3/34
Inventor 林菘王鸣义郁培龄吴以准朱刚钱军张晓静
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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