Preparation method of expandable graphite modified petroleum resin

A technology of expanded graphite and petroleum resin, applied in the field of preparation of expandable graphite modified petroleum resin, can solve the problems of easy aging, can not meet the requirements of the material market, petroleum resin cannot be used, etc., and achieves the effect of improving thermal oxidation resistance

Inactive Publication Date: 2018-09-04
钱万琦
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the defect that the current ordinary petroleum resin is easy to age under high temperature, light and oxygen, which makes the petroleum resin unusable and cannot meet the requirements of the material market, a kind of expandable graphite modified petroleum resin is provided. Preparation

Method used

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  • Preparation method of expandable graphite modified petroleum resin

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Embodiment Construction

[0019] Weigh 36-42g of natural flake graphite and grind it for 11-13min to obtain natural flake graphite powder, then mix concentrated sulfuric acid solution with a mass fraction of 85%, hydrogen peroxide with a concentration of 0.5mol / L and Acetic anhydride was mixed and stirred for 12 to 15 minutes to obtain a mixed solution; the natural flake graphite powder, mixed solution and potassium permanganate were mixed and stirred for 27 to 30 minutes in a mass ratio of 7:2:1, and the filtrate was filtered to obtain a filter residue. Put the filter residue into an oven, dry at a temperature of 75-81°C for 32-36 minutes, cool to room temperature naturally, grind for 16-20 minutes, and then pass through a 85-mesh sieve to obtain self-made expandable graphite powder; calculated in parts by weight , weigh 24-32 parts of xylene, 10-12 parts of dicyclopentadiene, 9-11 parts of isoprene, 3-5 parts of styrene and 1-3 parts of n-pentene and mix them in the reactor , stirred for 12-16 minute...

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Abstract

The invention discloses a preparation method of expandable graphite modified petroleum resin, and belongs to the technical field of resin preparation. Firstly, xylene, dicyclopentadiene, isoprene, styrene, n-pentene and the like are mixed in a reaction kettle and stirred under high temperature and high pressure for a reaction to obtain copolymerized petroleum resin, and then benzotriazole is addedinto the copolymerized petroleum resin; natural flake graphite powder is surface-modified by utilizing a concentrated sulfuric acid solution and hydrogen peroxide and then blended with acetic anhydride and potassium permanganate, expandable graphite is prepared under the high-temperature condition, the expansion times can be tens to hundreds of times or even thousands of times, the original flakeshape is changed into a worm shape with low density, a dense heat-insulation carbon layer is formed, the invasion of external high temperature, illumination and oxygen is prevented, even though polymer molten droplets exist at high temperature, the petroleum resin can flow into the space between graphite sheet layers but cannot drop to the exterior, the thermal aging resistance of the petroleum resin is further improved, and the petroleum resin has broad application prospects.

Description

technical field [0001] The invention discloses a preparation method of expandable graphite modified petroleum resin, which belongs to the technical field of resin preparation. Background technique [0002] Petroleum resin is a thermoplastic resin produced by the C5 and C9 fractions produced by petroleum cracking by pretreatment, polymerization, distillation and other processes. It is not a high polymer, but an oligomer with a molecular weight between 300 and 3000. Petroleum resin is named after the source of petroleum derivatives. It has low acid value, good miscibility, water resistance, ethanol resistance and chemical resistance, chemical stability to acid and alkali, and good viscosity adjustment and thermal stability. features. Petroleum resins are generally not used alone, but are used together as accelerators, regulators, modifiers and other resins. [0003] Petroleum resins are divided into aliphatic resins (C5), cycloaliphatic resins (DCPD), aromatic resins (C9), a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L57/02C08K7/24C08K5/3475C08F240/00
CPCC08F240/00C08K5/3475C08K7/24C08L57/02
Inventor 钱万琦杨明忠陈可
Owner 钱万琦
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