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Flame-retardant low-melting copolyester compound and preparation method thereof

A technology of copolyester and compound, which is applied in the field of flame retardant low melting point copolyester compound and its preparation, can solve the problems of different polyester degradation characteristics, no flame retardant system, and different flame retardant methods, etc. Achieve the effect of industrialization of processing technology, excellent anti-droplet effect, and easy processing technology

Active Publication Date: 2022-05-17
NINGBO HUAXING SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the low-melting point polyester fiber introduces a third monomer into the polyester to form a copolyester, which lowers the melting point, it has different degradation characteristics from polyester, so its method of achieving flame retardancy is also different from that of ordinary polyester.
At present, there are some sporadic reports about low melting point copolyester and low melting point copolyester fiber. Although ester fiber can also improve the oxygen index of the material, 2-hydroxyethylphenylphosphorous acid is a flame retardant used in traditional polyester, so the flame retardant efficiency is not high, and the copolymerization process has a great impact on the performance of the material itself. Impact
At present, there is no report on the flame retardant system for the characteristics of low melting point copolyester

Method used

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  • Flame-retardant low-melting copolyester compound and preparation method thereof
  • Flame-retardant low-melting copolyester compound and preparation method thereof
  • Flame-retardant low-melting copolyester compound and preparation method thereof

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preparation example Construction

[0071] Correspondingly, the embodiment of the present application also provides a method for preparing the above-mentioned flame-retardant low-melting polyester compound, including:

[0072] Step S1: In terms of mass percentage, mix 90%-94% polyester with a melting point not higher than 180°C, 4.5%-7% composite flame retardant, 0.1%-1% viscosity regulator, 0.5% -1.5% flame retardant synergist and 0.1%-1% antioxidant to obtain a mixture;

[0073] Step S2: masticating and cooling the mixture to obtain a flame-retardant low-melting copolyester compound with a melting point not higher than 180°C.

[0074] In some embodiments, the copolyester has a melting point of 110°C to 180°C.

[0075] The mixture is masticated by using a screw extruder, and the temperature during mastication is 180° C. to 200° C.

Embodiment 1

[0077] 940g copolyester (melting point 110°C), 10g first flame retardant 40g second flame retardant 2g of viscosity modifier (TGIC), 5g of flame retardant synergist (MCA-MMT) and 3g of antioxidant 1010, mixed uniformly with a high-speed mixer, and the resulting mixture was placed in a screw extruder at 180°C to 200°C Extruded and cooled to obtain a short-fiber-oriented high-efficiency flame-retardant low-melting copolyester compound. Test specimens were made by injection molding.

[0078] The melting point and limiting oxygen index (LOI) of the high-efficiency flame-retardant low-melting copolyester compound oriented to short fibers were tested, and the UL-94V-0 level test was carried out. Among them, the higher the LOI, the material is not easy to burn. Generally, LOI 27 belongs to flammable materials.

[0079] The melting point of the high-efficiency flame-retardant low-melting-point copolyester compound oriented to short fibers is measured to be less than 180°C, and ...

Embodiment 2

[0081] 9000g of copolyester (melting point 120°C), 100g of the first flame retardant 600g second flame retardant 100g of viscosity regulator (P-Si), 100g of flame retardant synergist (MCA-MMT) and 100g of antioxidant 168, mixed uniformly with a high-speed mixer, and the resulting mixture was heated in a screw extruder at 180°C to 200°C Extruded under conditions, cooled to obtain a short-fiber-oriented high-efficiency flame-retardant low-melting polyester compound. Test specimens were made by injection molding.

[0082] The high-efficiency flame-retardant low-melting point polyester compound for short fibers has a melting point of less than 180°C, and its flame-retardant properties are as follows: LOI is 35.8%, can pass the UL-94V-0 level test, and has good anti-dripping effect and spinnability sex.

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Abstract

The technical solution of the present application provides a flame-retardant low-melting-point copolyester compound and a preparation method thereof, wherein the flame-retardant low-melting-point copolyester compound includes: 90%-94% of melting point Copolyester above 180℃, 4.5%-7% composite flame retardant, 0.1%-1% viscosity modifier, 0.5%-1.5% flame retardant synergist and 0.1%-1% antioxidant . The flame-retardant low-melting-point copolyester compound of the technical solution of the present application not only has excellent flame-retardant properties, but also has good spinnability, and is of natural color, so that the subsequent processing will not be restricted by color, and the processing is convenient, and at the same time Inexpensive.

Description

technical field [0001] The present application relates to the technical field of polymer materials, in particular to a flame-retardant low-melting copolyester compound and a preparation method thereof. Background technique [0002] Polyester has excellent comprehensive properties and good processability, and can be used as engineering plastics, fibers, films, etc. Among them, polyester fiber has become the most widely used and most consumed synthetic fiber variety due to its many advantages. However, polyester fiber is relatively flammable, and its limiting oxygen index is only about 22%, which cannot meet the requirements of its flame retardant performance in public places. Therefore, it is very necessary to improve the flame retardant performance of polyester. Since the 1970s, countries around the world have conducted a lot of research on the development of flame-retardant polyester, and developed a series of flame-retardant polyester products. Although my country's rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K3/34C08K5/3492C08K5/5313C08K5/5419C08K13/02
CPCC08K13/02C08K3/346C08K5/34928C08K5/34924C08K5/5419C08K5/5313C08L2201/02C08L67/02
Inventor 黄金德黄翔陈必胜李娟郭正虹
Owner NINGBO HUAXING SCI & TECH