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Preparation method of low-chroma high-softening-point dicyclopentadiene petroleum resin

A technology of dicyclopentadiene and petroleum resin, which is applied in the field of petroleum resin preparation, can solve the problems of low softening point, deep hue, low softening point, etc., and achieves the effects of high petroleum resin yield and easy implementation.

Active Publication Date: 2013-07-03
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that the existing dicyclopentadiene petroleum resin has deep hue but low softening point or low softening point under low chroma

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In a 5-liter high-pressure reactor, add 800g of decahydronaphthalene and 1200g of dicyclopentadiene (purity > 87%), close the reaction system, replace it with nitrogen for three or more times, and gradually heat up to a reaction temperature of 240°C. After reacting at MPa for 8 hours, unreacted dicyclopentadiene monomer, toluene and oligomers were removed by vacuum distillation, and dried at 150°C and -0.1MPa negative pressure for 8 hours to obtain dicyclopentadiene petroleum resin product with a softening point of 143 °C, the Garner chroma is 4.1, and the product yield is 87%.

Embodiment 2

[0028] In a 5-liter high-pressure reactor, add 1200g of decahydronaphthalene and 800g of dicyclopentadiene (purity > 87%), close the reaction system, replace it with nitrogen for three or more times, and gradually heat up to a reaction temperature of 240°C. After reacting at MPa for 8 hours, unreacted dicyclopentadiene monomer, reaction solvent and oligomers were removed by vacuum distillation, and dried at 150°C and -0.1MPa negative pressure for 8 hours to obtain dicyclopentadiene petroleum resin product, softening point At 122°C, the Garner chroma is 3.6, and the product yield is 75%.

Embodiment 3

[0030] In a 5-liter high-pressure reactor, add 1000g decahydronaphthalene and 1000g dicyclopentadiene (purity > 87%), seal the reaction system, replace it with nitrogen for three or more times, and gradually heat up to a reaction temperature of 275°C. After reacting at MPa for 8 hours, unreacted dicyclopentadiene monomer, reaction solvent and oligomers were removed by vacuum distillation, and dried at 150°C and -0.1MPa negative pressure for 8 hours to obtain dicyclopentadiene petroleum resin product, softening point At 180°C, the Garner chroma is 8.3, and the product yield is 91%.

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PUM

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Abstract

The invention discloses a preparation method of low-chroma high-softening-point dicyclopentadiene petroleum resin. The method is characterized by comprising the following steps of: undergoing a thermal polymerization reaction under the condition that dicyclopentadiene is taken as a raw material, decahydronaphthalene is taken as a solvent, the ratio of the solvent to the dicyclopentadiene is 1:5, the temperature is 180-300 DEG C and the pressure is 1.0-3.0 MPa for 6-20 hours; and after the polymerization reaction, distilling under reduced pressure and removing unreacted monomers, solvents and low polymers to obtain the dicyclopentadiene petroleum resin.

Description

technical field [0001] The invention relates to the preparation technology of petroleum resin; it is a preparation method of dicyclopentadiene petroleum resin with low chroma and high softening point. Background technique [0002] Most petroleum resin products are prepared by cationic catalyzed polymerization. This polymerization reaction requires cationic catalysts to be well dispersed. Otherwise, gel may be generated, resulting in uneven performance of the polymerized product. At the same time, the post-reaction treatment process is complicated and requires alkaline washing, neutralization, Washing, vacuum distillation / stripping, drying and other steps can get the final product. In the process of post-treatment, not only does the alkali washing consume a large amount of water, which causes environmental pollution, but also there may be emulsification in the process of alkali washing and washing, which makes it more difficult to remove the catalyst, and even the removal is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F240/00C08F2/06
Inventor 刘新普于海斌南军曲晓龙张玉婷耿姗张景成石芳杨建国
Owner CHINA NAT OFFSHORE OIL CORP