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Preparation method of phenolic resin raw material for improving strength of phenolic resin fiber protofilament

The technology of phenolic resin fiber and phenolic resin is applied in the field of preparation of phenolic resin raw materials, which can solve the problems of low strength of raw silk, poor spinnability, low molecular weight of phenolic resin raw materials, etc., and achieves the effect of simple operation and improved spinnability.

Inactive Publication Date: 2020-01-03
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art and solve the technical problems of low molecular weight, poor spinnability and low filament strength of phenolic resin raw materials, the invention provides a method for preparing phenolic resin raw materials for improving the strength of phenolic resin fiber precursors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put the purified thermoplastic phenolic resin with a free phenol content of 0.02% into a sealed stirred tank, add polypropylene with a mass of 10% of the resin mass, seal it, heat it to 160°C under the protection of nitrogen, keep it warm and stir for 1 hour, take it out Slice after cooling to obtain highly spinnable phenolic resin. Put the resin into a spinning kettle, heat up to 160°C under nitrogen protection, pressurize to 1.0 MPa to carry out melt spinning, the spinning speed is 600 m / min, and the strength of the obtained raw yarn is 30 MPa.

Embodiment 2

[0021] Put the purified thermoplastic phenolic resin with a free phenol content of 0.5% into a sealed stirring tank, add polyamide with a mass of 30% of the resin mass, heat it to 170°C under the protection of nitrogen after sealing, keep stirring for 3 hours, and take out Slice after cooling to obtain highly spinnable phenolic resin. Put the resin into a spinning kettle, heat up to 180° C. under nitrogen protection, and pressurize to 1.2 MPa for melt spinning at a spinning speed of 700 m / min to obtain a raw fiber strength of 70 MPa.

Embodiment 3

[0023] Put the purified thermoplastic phenolic resin with a free phenol content of 0.2% into a sealed stirring tank, add polymethyl methacrylate with a mass of 3% of the resin mass, heat it to 150°C under the protection of nitrogen after sealing, and keep stirring After 0.5 hours, take it out and cool it down and slice it to obtain a phenolic resin with high spinnability. Put the resin into a spinning kettle, heat up to 150°C under nitrogen protection, pressurize to 0.8MPa to carry out melt spinning, the spinning speed is 550m / min, and the strength of the obtained raw yarn is 15MPa.

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PUM

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Abstract

The invention relates to a preparation method of a phenolic resin raw material for improving the strength of a phenolic resin fiber protofilament, and belongs to the technical field of a phenolic fiber preparation raw material. The technical problem that the phenolic resin raw material has low molecular weight, low spinnability and low protofilament strength. The method comprises the following steps: S1, purifying phenolic resin to obtain phenolic resin with low free phenol content; and S2, adding the phenolic resin with low free phenol content prepared in the step S1 and a macromolecular polymer, in an amount which is 3 to 30 percent of the mass of the phenolic resin, into a stirring kettle, heating the stirring kettle to 150 to 180 DEG C in inert gas atmosphere, heating the raw materialto a molten state, performing heat-preserving stirring for 0.5 to 3 hours, cooling the molten-state raw material along with the stirring kettle and cutting into slices to prepare the phenolic resin raw material. Compared with other methods, the preparation method has the following advantages: the spinnability of the phenolic resin and the strength of the phenolic fiber protofilament can be obviously improved; furthermore, the raw materials are easily available, and the preparation method is simple, convenient and rapid in operation.

Description

technical field [0001] The invention belongs to the technical field of phenolic fiber preparation raw materials, and in particular relates to a method for preparing phenolic resin raw materials for improving the strength of phenolic resin fiber precursors. Background technique [0002] Phenolic fiber is a three-dimensional cross-linked organic fiber, which has outstanding flame retardancy, heat insulation, high carbon residue rate, instantaneous high temperature resistance, chemical corrosion resistance, sound insulation and other properties, and can be used as heat insulation, insulation and Corrosion-resistant materials, and fireproof, anti-corrosion clothing and acid-resistant and corrosion-resistant materials for civil use; it is also the precursor of carbon fibers, graphite fibers, activated carbon fibers and other fibers, and is a special fiber with important practical value. [0003] Phenolic fibers are generally prepared from thermoplastic phenolic resins by melt spi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L77/00C08L33/12C08L25/06C08L61/06
CPCC08L23/12C08L25/06C08L33/12C08L77/00C08L2203/12C08L61/06
Inventor 刘占军张东卿李宏弟宋燕郭全贵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI