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A kind of modified flame-retardant polyethylene terephthalate system and preparation method thereof

A technology of ethylene glycol phthalate and polyparaffin, which is applied in the field of polytetrafluoroethylene-zinc borate composite modified flame-retardant PET system and its preparation, can solve the problems of restricting the application of phosphorus-containing flame retardants, melt drop Avoid problems such as falling and smoke release, and achieve the effects of reducing fire hazards, inhibiting degradation, and easy operation

Active Publication Date: 2018-05-29
BEIJING INST OF CLOTHING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the flame retardant effect of halogen-based flame retardants is good and the addition amount is small, its combustion products have certain negative effects on the environment, such as releasing toxic and corrosive hydrogen halide gases, etc.; and halogen-free flame retardants For example, phosphorus-based flame retardants have the advantages of safety, non-toxicity, and low price, so their applications are gradually increasing.
However, the existing phosphorus-containing flame-retardant PET system has the defects of obvious melt dripping and smoke release while having high flame retardancy, which restricts the application of phosphorus-containing flame retardants.

Method used

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  • A kind of modified flame-retardant polyethylene terephthalate system and preparation method thereof
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  • A kind of modified flame-retardant polyethylene terephthalate system and preparation method thereof

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preparation example Construction

[0039] According to a second aspect of the present invention, the preparation method of the modified flame-retardant PET system comprises the following steps:

[0040] Step 1), weighing each component according to the weight ratio, and pre-mixing;

[0041] In step 2), each component is sequentially added to the compounding equipment for melt blending.

[0042] In step 2), the compounding equipment is a single-screw extruder or a twin-screw extruder, preferably a twin-screw extruder. The process parameters of the extruder are: 230°C in the first zone, 260°C in the second zone, and 270°C in the third zone. ℃, the fourth zone is 270°C, the fifth zone is 260°C, the sixth zone is 240°C, and the screw speed is 15-20r / min.

[0043] Optionally, the obtained product is dried, and the drying is any possible implementation method in the prior art, including any one of normal pressure drying and low pressure drying, preferably vacuum drying, the drying temperature is 110-150 ° C, and the...

Embodiment 1

[0046] 1) Weigh 910g PET, 40g CEPPA, 40gZB, 10gPTFE, 0.32g antioxidant 1010, 0.32g triphenyl phosphite, and mix well;

[0047]2) Add each component into the twin-screw extruder in turn. The process parameters of the extruder are: 230°C in the first zone, 260°C in the second zone, 270°C in the third zone, 270°C in the fourth zone, 260°C in the fifth zone, and 240°C in the sixth zone. °C, the screw speed is 20r / min; the obtained product is vacuum dried at 130 °C for 10 h. The mass content of PTFE (relative to the PET blend) in the obtained blend is 1 wt%, the mass content of ZB (relative to the PET blend) is 4 wt%, and the blend is named F-Z4F1.

Embodiment 2

[0049] 1) Weigh 910gPET, 40gCEPPA, 30gZB, 20gPTFE, 0.32g antioxidant 1010, 0.32g triphenyl phosphite, and mix well; 2) Add each component to the twin-screw extruder in turn, and the process parameters of the extruder 230°C in the first zone, 260°C in the second zone, 270°C in the third zone, 270°C in the fourth zone, 260°C in the fifth zone, 240°C in the sixth zone, the screw speed is 20r / min; the obtained product is vacuum dried at 140°C for 9 hours. The mass content of PTFE (relative to the PET blend) in the obtained blend is 2 wt%, the mass content of ZB (relative to the PET blend) is 3 wt%, and the blend is named F-Z3F2.

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Abstract

The invention discloses a modified inflaming retarding polyethylene glycol terephthalate (PET) system and a preparation method thereof. The modified inflaming retarding PET system comprises, by weight, 100 parts of PET resin, 1-10 parts of phosphorus containing fire retardant, 1-6 parts of flame retardant synergist, 1-10 parts of molten drop resistance additive, 0.01-0.08 part of heat stabilizer and 0.01-0.08 part of antioxidant. The modified inflaming retarding PET system has the advantages of being high in flame retardance, resistant to molten drop and obvious in smoke suppression effect, and the preparation method is easy and convenient to operate, free of pollution and convenient to implement.

Description

technical field [0001] The invention relates to a flame-retardant PET system, in particular to a polytetrafluoroethylene-zinc borate composite modified flame-retardant PET system and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET), as a synthetic fiber with the fastest development, the highest output and the widest application range, has excellent properties such as high strength, stable size and chemical corrosion resistance, and is widely used in clothing, indoor Exterior decoration and various special materials. However, the limiting oxygen index (LOI) of PET is only about 22%. It is a flammable polymer material, which cannot meet the requirements for flame retardancy in some fields, and has obvious melt dripping during the combustion process. , It is often the cause of ignition, spread and scalds in fires, and it is easy to cause secondary injuries. How to improve the flame retardancy of PET and reduce its hazard in fire has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L27/18C08K13/02C08K5/5313C08K3/38C08K5/134C08K5/526
CPCC08L67/02C08L2201/02C08L2201/08C08L2201/22C08L27/18C08K13/02C08K5/5313C08K2003/387C08K5/1345C08K5/526
Inventor 朱志国王锐董振峰马萌魏丽菲
Owner BEIJING INST OF CLOTHING TECH