A kind of aromatic modified petroleum resin and preparation method thereof

Abstract

The invention discloses an aromatic modified petroleum resin and a preparation method thereof, comprising a base resin, a maleic anhydride copolymer, a hydrogenation catalyst, a hydrogenation solvent, and hydrogen, and a preparation method of an aromatic modified petroleum resin. One or several mixtures of the by-product fractions of cracked ethylene are used as raw materials, and the base resin is obtained after thermal polymerization with the initiator to obtain the base resin. Under the action of inert gas, the base resin undergoes modification reaction with maleic anhydride copolymer to increase petroleum Resin compatibility, improve the chemical properties of petroleum resin, modified petroleum resin, under the action of hydrogenation catalyst, undergo modification reaction with hydrogen, improve the stability of petroleum resin, reduce the color of petroleum resin, use this The method can reduce the large-scale use of catalysts, save resources, protect the environment, and is simple to operate. The petroleum resin prepared by adopting the present invention has the advantages of light color, good compatibility, good stability, and improved softening point, etc., and increases the petroleum resin. application field.

Description

technical field [0001] The invention relates to a modification method of petroleum resin, in particular to an aromatic modified petroleum resin and a preparation method thereof. Background technique [0002] Petroleum resin is made of one or more mixtures of C5 fraction, C9 fraction, pure monomer, dicyclopentadiene fraction and other fractions rich in unsaturated olefins produced in the process of petroleum cracking to ethylene, through thermal polymerization process Or a thermoplastic resin obtained by catalytic polymerization. Petroleum resin is cheap, low melting point, good water resistance and widely used in rubber, paint, coatings, additives, printing inks, etc., but petroleum resin contains a large number of unsaturated bonds. The petroleum resin produced by the thermal polymerization process has dark color, strong odor, poor stability and compatibility. The petroleum resin produced by catalytic polymerization is relatively light in color and low in odor, but the amou...

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Problems solved by technology

[0002] Petroleum resin is made of one or more mixtures of C5 fraction, C9 fraction, pure monomer, dicyclopentadiene fraction and other fractions rich in unsaturated olefins produced in the process of petroleum cracking to ethylene, through thermal polymerization process Or a thermoplastic resin obtained by catalytic polymerization. Petroleum resin is cheap, low melting point, good water resistance and widely used in rubber, paint, coatings, additives, printing inks, etc., but petroleum resin contains a large number of unsaturated bonds. The petroleum resin produced by the thermal polymerization process has dark color, strong odor, poor stability and compatibility. The petroleum resin produced by catalytic polymerization is relatively light in color and low in odor, but the amount of catalyst used is large, and the catalyst is not easy to handle, which increases the cost of use. The environment also causes certain pollution, so modern technology adopts thermal polymerization method to make petroleum resin. How to improve the performance of petroleum resin needs to modify petroleum resin

[0003] Petroleum resin modification generally includes hydrogenation modification and polar functional group modification. Hydrogenation modification can saturate the double bonds in the resin, and improve the hue, heat resistance, and softening point, but the disadvantage is that the resin is saturated. The strength increases, and the cohesive force, compatibility, and adhesion performance all decrease. Patent CN200910242177.1 discloses a method for preparing dicyclopentadiene hydrogenated petroleum resin, using liquid Pt catalyst to dicyclopentadiene petroleum resin After hydrogenation, the stability, hue, heat resistance, and softening point of the hydrogenated petroleum resin obtained are improved accordingly, but the compatibility and adhesion properties are all reduced, and the Pt catalyst is expensive, and the cost of hydrogenation is high , patent CN103386302B discloses a petroleum resin hydrogenation catalyst and its preparation method, that is, Al2O3 is used as a carrier, loaded with noble metal Pd and oxide additives, the catalyst activity is high, and the preparation method is simple. The disadvantage is that the catalyst is sensitive to impurities. It is easy to be poisoned and deactivated, and the life of the catalyst is affected. The modification of polar functional groups can introduce polar functional groups to improve the compatibility of petroleum resins. Patent CN200480018371.7 discloses acid-modified petroleum resins and hot-melt road markings. The material is a petroleum resin mainly composed of ethylenically unsaturated hydrocarbon monomer units with 4 to 6 carbon atoms, and a carboxyl group or acid anhydride derived from an ethylenically unsaturated carboxylic acid with 8 or less carbon atoms or an anhydride thereof is introduced It is obtained from the base, has low melt viscosity, shows good fluidity at relatively low temperatures, and has excellent color tone and heat-resistant color tone stability, but the color is darker and the taste is relatively strong. The structure of petroleum resin does not change much and softens. The point and cohesive strength have not been greatly improved, and the application fields of petroleum resin are still limited

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