Preparation of flame-retardant polyester for preparing industrial yarn

A flame-retardant polyester, manufacturing industry technology, applied in the field of preparation of flame-retardant polyester, to achieve the effect of improving the decline in 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 method for preparing flame-retardant polyester for industrial yarns. 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 themselves will not adversely affect the manufacture of flame-retardant polyester industrial yarn or the performance of the produced product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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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

Examples

Experimental program
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Effect test

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] Among them, R 1 is methylene, R 2 , R 3For hydroxyethyl.

[0032] The feeding ratio of raw materials is controlled respectively as follows:

[0033] In molar ratio, terephthalic acid: ethylene glycol=100:110~200;

[0034] 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;

[0035] In terms of weight ratio, terephthalic acid: reactive flame retardant = 100: 2.90-14.60, see Table 1 for specific data and flame retardant content in flame-retardant polyester products.

[0036] The way of adding nano-kaolin is selected before the esterification reaction. When the raw materi...

Embodiment 5～8

[0043] 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 yarn 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 R1 in the structural formula I is alkylidene of C1 to C4, and R2 and R3 are respectively H and hydroxyalkyl or carboxyalkyl of C2 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 yarn.

Description

technical field [0001] The invention relates to a method for preparing a flame-retardant polyester, in particular to a method for preparing a flame-retardant polyester containing a phosphorus-based organic reactive flame retardant for manufacturing industrial yarns. 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 (or industrial polyester fibers) whose consumption is growing continuously. Polyester industrial yarn), good flame retardancy has gradually become its basic performance requirements. 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 macromo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/78C08G63/86C08K5/5357C08L67/03D01F6/62D01F1/07C08K3/34
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
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