A kind of preparation method of liquid piperylene petroleum resin

Abstract

The invention relates to a preparation method of liquid m-pentadiene petroleum resin. The preparation method comprises the following steps: taking the C5 alkene fraction obtained by a C5 separating device as the raw material, wherein the m-pentadiene content of the C5 alkene fraction is not less than 65% by mass, and the cyclopentene content of the C5 alkene fraction is not less than 15.0% by mass; adding alkene-containing silane coupling agent with a mass percentage of 0.1 to 10.0% as the room temperature curing agent, taking toluene as the solvent and waterless aluminum trichloride as the catalyst, adding 100 to 2000 ppm of water to carry out molecular chain transfer, controlling the resin molecular weight, controlling the temperature below 20 DEG C, the balance reaction temperature in a range of 0 to 80 DEG C, and the reaction time in a range of 0.5 to 4 hours during the dropwise adding process so as to obtain the liquid m-pentadiene resin. The reaction time of preparation method is short. Because the m-pentadiene resin is in a liquid state, a curing promoter accounting for 0.1 to 3.0% of the total weight of the resin is added to promote the curing before using the resin. The resin is energy saving and environment-friendly, requires little washing water, and can save water by 30% or more. The preparation technology is convenient and safe.

Description

technical field [0001] The present invention relates to C 5 After the cyclopentadiene and isoprene are removed from the distillate, the resulting piperylene concentrate containing 60-70% is used as a raw material to prepare liquid piperylene petroleum resin. Background technique [0002] In the process of petroleum cracking to ethylene, by-product C 5 Fractions account for 15% to 20%, C 5 The distillate contains diolefins such as isoprene, cyclopentadiene and piperylene. These diolefins have active chemical properties and their main purpose is to manufacture C 5 Aliphatic petroleum resins, which usually have the characteristics of light color, low density and high saturation, are widely used in adhesives, hot-melt road marking paints, coatings, inks, rubber additives and other industries. [0003] Piperylene petroleum resin is generally prepared by cationic polymerization of piperylene, usually using piperylene concentrate as raw material (piperylene content greater than ...

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Problems solved by technology

[0005] Patent US482492 proposes that the C5 fraction with olefin mass fraction of 4% to 80% (wherein the mass fraction of isoprene is less than 1.5%, the mass fraction of piperylene is 50% to 80%, and the mass fraction of monoolefin is greater than 20%), only using styrene or methyl styrene as a modifying agent to prepare petroleum resin, although a resin with strong viscosity can be obtained, the softening point of the resin is too low (less than 90°C)

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