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A kind of production technology of poly(p-phenylene benzobisoxazole) fiber continuous polymerization spinning

A technology of benzobisoxazole and poly-p-phenylene, which is applied in the production process of continuous polymerization spinning of poly-p-phenylene benzobisoxazole fiber, and in the field of fiber spinning production process, which can solve the problem that industrial continuous production cannot be realized , not the PBO fiber continuous production process and other issues, to reduce the risk of equipment failure, increase accuracy, and improve production efficiency

Active Publication Date: 2021-06-15
中蓝晨光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. This method is not a continuous production process of PBO fiber
[0009] But above-mentioned method is also a kind of intermittent polymerization spinning process, can't realize industrialized continuous production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A production process for continuous polymerization and spinning of poly-p-phenylene benzobisoxazole fibers, comprising the following process steps:

[0037] A. Degassing prepolymerization

[0038] With all 4,6-diaminoresorcinol hydrochloride, phosphorus pentoxide, the terephthalic acid of 80% of total charging capacity and the polyphosphoric acid of 76% of total charging capacity add in the degassing still, at 50 Under the temperature condition of ℃, the degassing reaction is carried out for 10 hours to obtain the prepolymer, and then the prepolymer is transferred to the defoaming mixed batch tank through the delivery pump;

[0039] B. TPA mix

[0040] In the slurry mixing tank, mix and stir terephthalic acid and polyphosphoric acid at a temperature of 50°C to prepare a 3% TPA / PPA slurry;

[0041] C. Post-polymerization

[0042] The prepolymer in the defoaming mixing batch tank in step A and the TPA / PPA slurry in the slurry mixing tank in step B are input into the tw...

Embodiment 2

[0046] A production process for continuous polymerization and spinning of poly-p-phenylene benzobisoxazole fibers, comprising the following process steps:

[0047] A. Degassing prepolymerization

[0048] With all 4,6-diaminoresorcinol hydrochloride, phosphorus pentoxide, the terephthalic acid of 99% of total charging capacity and the polyphosphoric acid of 98% of total charging capacity add in the degassing still, at 120 Under the temperature condition of ℃, the degassing reaction is carried out for 20 hours to obtain the prepolymer, and then the prepolymer is transferred to the defoaming mixed batch tank through the delivery pump;

[0049] B. TPA mix

[0050] In the slurry mixing tank, mix and stir terephthalic acid and polyphosphoric acid at a temperature of 100°C to prepare a 10% TPA / PPA slurry;

[0051] C. Post-polymerization

[0052] The prepolymer in the defoaming mixing batch tank in step A and the TPA / PPA slurry in the slurry mixing tank in step B are input into the t...

Embodiment 3

[0056] A production process for continuous polymerization and spinning of poly-p-phenylene benzobisoxazole fibers, comprising the following process steps:

[0057] A. Degassing prepolymerization

[0058] With all 4,6-diaminoresorcinol hydrochloride, phosphorus pentoxide, the terephthalic acid of 90% of total charging capacity and the polyphosphoric acid of 87% of total charging capacity add in the degassing still, at 85 Under the temperature condition of ℃, the degassing reaction was carried out for 15 hours to obtain the prepolymer, and then the prepolymer was transferred to the defoaming mixed batch tank through the delivery pump;

[0059] B. TPA mix

[0060] In the slurry mixing tank, mix and stir terephthalic acid and polyphosphoric acid at a temperature of 75°C to prepare a 6.5% TPA / PPA slurry;

[0061] C. Post-polymerization

[0062] The prepolymer in the defoaming mixing batch tank in step A and the TPA / PPA slurry in the slurry mixing tank in step B are input into th...

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PUM

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Abstract

The invention relates to a production process for continuous polymerization and spinning of poly-p-phenylene benzobisoxazole fibers, belonging to the technical field of high-performance fiber production. Through the steps of degassing pre-polymerization, TPA pulping, post-polymerization and spinning, the present invention can truly realize the uninterrupted continuous polymerization and spinning under the premise of ensuring the cost, quality and smoothness of the whole process, and realize the production of PBO fibers. Large-scale continuous production.

Description

technical field [0001] The invention relates to a production process of fiber spinning, more specifically, the invention relates to a production process of continuous polymerization spinning of poly-p-phenylene benzobisoxazole fiber, which belongs to the technical field of high-performance fiber production. Background technique [0002] Poly-p-phenylenebenzobisoxazole (PBO) fiber is known as the 21st century super fiber, which has a series of excellent properties such as high strength, high modulus, flame retardancy and heat resistance. Due to its excellent performance, PBO fiber has important application value in aerospace, national defense and military industry, high temperature protection and other fields. Developed by Dow Corporation of the United States, Toyobo Corporation of Japan realized industrialization in the 1990s. It is still in the stage of small test or pilot test in China, and has not realized real industrialized continuous production. [0003] The prerequis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/74C08G73/22
Inventor 范新年许伟黄治川赵亮付兴伟冉茂强杨文良
Owner 中蓝晨光化工有限公司
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