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Preparation method of pitch for carbon fiber and pitch for carbon fiber

A carbon fiber and pitch technology, applied in the field of carbon fiber pitch, can solve the problems of easily leaving mesophase components and low yield, and achieve the effects of suppressing insoluble components, high yield, high softening point and high strength

Active Publication Date: 2019-11-01
GS CALTEX CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, isotropic pitch with a narrow range of molecular weight distribution can be prepared from raw materials with a wide molecular weight distribution by this method, but there are disadvantages in the homogeneity and spinnability of the prepared pitch, that is, , not only the yield is low, but also easy to leave mesophase components when heated

Method used

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  • Preparation method of pitch for carbon fiber and pitch for carbon fiber
  • Preparation method of pitch for carbon fiber and pitch for carbon fiber
  • Preparation method of pitch for carbon fiber and pitch for carbon fiber

Examples

Experimental program
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Effect test

Embodiment 1～ Embodiment 10

[0066] After loading pyrolysis fuel oil (PFO) and dicumyl peroxide (DCP, dicumyl peroxide) or hydrogen peroxide (hydrogen peroxide) in the reactor to mix, load ozone (O 3 ) gas while performing heat treatment, thereby performing a radical polymerization reaction.

[0067] After the radical polymerization reaction, nitrogen gas with a flow rate of 2 L / min was passed for a predetermined time to remove unreacted or low-reacted molecules, thereby obtaining the pitches prepared according to Examples 1 to 10.

[0068] The reaction conditions of each embodiment are shown in Table 1.

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Abstract

The invention relates to a carbon fiber asphalt preparation method and carbon fiber asphalt. The preparation method is characterized in that a peroxide compound and ozone are loaded into residual oil in a petroleum process, and a heat treatment is performed so as to carry out a reaction. According to the present invention, with the preparation method, the carbon fiber asphalt with characteristics of high yield at a lower temperature, high softening point, high strength, excellent oxidation stability, excellent oxidation infusibility, and low quinoline insoluble substance content can be provided.

Description

technical field [0001] The present invention relates to a pitch for carbon fibers, and more specifically relates to a method for preparing pitch for carbon fibers with a high softening point by free radical crosslinking (Crosslinking) and the pitch for carbon fibers prepared according to the preparation method. Background technique [0002] Carbon fibers are classified into polyacrylonitrile, cellulose, pitch, and phenolic resins according to their raw materials. Among them, pitch-based carbon fibers are roughly classified into mesophase according to the type of pitch used as a precursor. Pitch-based carbon fibers and isotropic (Isotropic) pitch-based carbon fibers. [0003] The aforementioned mesophase pitch-based carbon fibers are prepared using optically anisotropic mesophase pitch as a precursor, and the isotropic pitch-based carbon fibers are prepared using optically isotropic isotropic pitch as a precursor. Regarding the mechanical properties of carbon fibers, mesopha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/02D01F9/155
Inventor 朴相昱吴永世崔智受金基雄朴商希
Owner GS CALTEX CORP
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