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A method of in-situ grafting modified spinning of high-strength flame-retardant polyester

A technology of in-situ grafting of flame-retardant polyester, which is applied in the field of in-situ grafting and modified spinning of high-strength flame-retardant polyester, to achieve the effects of suppressing droplet, obvious flame-retardant effect, and good flame-retardant performance

Inactive Publication Date: 2017-10-24
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PET itself is easy to burn, and it will release a lot of heat when it burns, accompanied by a lot of smoke and toxic gases. Therefore, flame retardant modification of PET, especially environmental protection flame retardant modification, reduces its potential fire hazard. It has always been a major problem that urgently needs to be solved in the field of PET applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add TPA and EG with a molar ratio of 1.2:1, and DOPO accounting for 2% of the total mass of TPA and EG into the reactor, and react at 150°C for 100 minutes to obtain a prepolymer flame-retardant polyester.

[0025] (2) The catalyst zinc acetate and antimony trioxide (mass ratio of 1:1) accounting for 0.2% of the total mass of TPA and EG, and the phenolic antioxidant accounting for 0.1% of the total mass of TPA and EG are added to the obtained prepolymer, and then Together output to the main reactor twin-screw.

[0026] (3) The twin-screw length-to-diameter ratio of the main reactor is 1:20, the temperature of the twin-screw first-zone mixing and melting zone is 230°C, the pressure is 0.8KPa, the temperature of the second-zone reaction zone is 250°C, the pressure is 0.6KPa, and the third-zone reaction zone The temperature is 270°C, the pressure is 0.4KPa, the temperature in the fourth-zone reaction zone is 270°C, the pressure is 0.2KPa, the temperature in the five-zo...

Embodiment 2

[0031] (1) Add TPA and EG with a molar ratio of 1.4:1, and DOPO accounting for 6% of the total mass of TPA and EG into the reactor, and react at 230°C for 140 minutes to obtain a prepolymer flame-retardant polyester.

[0032] (2) The catalyst zinc acetate and antimony trioxide (mass ratio of 1:1) accounting for 0.6% of the total mass of TPA and EG, and the phenolic antioxidant accounting for 0.3% of the total mass of TPA and EG are added to the obtained prepolymer, and then Together output to the main reactor twin-screw.

[0033] (3) The twin-screw length-to-diameter ratio of the main reactor is 1:60, the temperature of the twin-screw first-zone mixing and melting zone is 250°C, the pressure is 0.6Kpa, the temperature of the second-zone reaction zone is 270°C, the pressure is 0.4Kpa, and the third-zone reaction zone The temperature is 290°C, the pressure is 0.2Kpa, the temperature in the fourth-zone reaction zone is 275°C, the pressure is 0.1Kpa, the temperature in the five-zo...

Embodiment 3

[0038] (1) Add TPA and EG with a molar ratio of 1.3:1, and DOPO accounting for 5% of the total mass of TPA and EG into the reactor, and react at 210°C for 130 minutes to obtain a prepolymer flame-retardant polyester.

[0039] (2) The catalyst zinc acetate and antimony trioxide (mass ratio of 1:1) accounting for 0.5% of the total mass of TPA and EG, and the phenolic antioxidant accounting for 0.2% of the total mass of TPA and EG are added to the obtained prepolymer, and then Together output to the main reactor twin-screw.

[0040] (3) The twin-screw length-to-diameter ratio of the main reactor is 1:50, the temperature of the twin-screw first-zone mixing and melting zone is 240°C, the pressure is 0.5Kpa, the temperature of the second-zone reaction zone is 260°C, the pressure is 0.3Kpa, and the third-zone reaction zone The temperature is 280°C, the pressure is 0.1Kpa, the temperature in the fourth-zone reaction zone is 270°C, the pressure is 0.1Kpa, the temperature in the five-zo...

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Abstract

The invention relates to an in-situ graft modified spinning method of high-strength flame-retardant polyester, comprising: adding TPA, EG and a flame retardant into a reaction kettle, and reacting at 150°C to 230°C for 100min to 140min to obtain a prepolymerized Integral flame retardant polyester; then add catalyst and additives, output to the twin-screw reactor; exhaust, pressurize and filter the high-viscosity melt, extrude and spin through the spinneret hole, and enter the cooling bath after passing through the gap of the air layer , to obtain raw silk; the raw silk is stretched by high-power heating in a water bath, and further heated and stretched, and finally heat-set and wound into high-strength flame-retardant polyester. The method is convenient, green, and economical. The PET grafted with DOPO in situ has obvious flame retardant effect, and the LOI reaches more than 34%. can suppress the generation of droplets.

Description

technical field [0001] The invention belongs to the field of polyester modified spinning methods, in particular to an in-situ graft modified spinning method of high-strength flame-retardant polyester. Background technique [0002] With the continuous improvement of people's living standards, the requirements for textiles are getting higher and higher. Fires caused by textiles frequently cause serious personal casualties and huge economic losses. Therefore, improving the flame retardancy of textiles plays an important role in ensuring the safety of property and reducing fire accidents. The application of qualified flame-retardant textiles in announcement places can reduce its fire load, reduce fire hazards, improve fire safety levels, and protect the personal and property safety of the people. [0003] Polyester is an important variety of synthetic fibers and is the trade name of polyester fibers in China. It is a fiber-forming high polymer-polyethylene terephthalate (PE) p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/07C08G63/692C08G63/183D01D13/00D01D5/12D01D10/02
Inventor 余木火杨燕平张玥张锡明于永山周荣伟耿晓宇邓雅唐静文陆帅羽
Owner DONGHUA UNIV
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