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The development of production and application of petroleum resin is slow

author£ºadmin Date£º2017/3/13 17:20:36
As the use of raw materials and polymerization process is different from the colorless resin to the reddish brown color, the main reason is that the polymer chain contains unsaturated double bond, oxidation stability is not good. In recent years, with the hot melt adhesives and other high demand for high-quality demand for high-quality petroleum resin, many companies use hydrogenation process to hydrogenate the unsaturated components of the resin, the oxidation stability of the white or close to the colorless petroleum resin. Hydrogenation using a fixed bed process, the catalyst for the palladium /aluminum oxide, the solvent is n-heptane (or n-hexane), the reaction pressure is 2.2 ~ 3.5MPa, temperature is 260 ~ 310 ¡æ, space velocity 0.2 ~ 2.0h-1, hydrogen oil ratio is 100 to 400. At present, most manufacturers have different degrees of expansion, and its production capacity greatly improved. Some western countries have developed hydrogenated liquid (or semi-solid) mixed C5 petroleum resin, and has formed a certain scale of production.
Due to the unstable supply of raw materials, the large fluctuations in quality, coupled with the competition of natural rosin and the quality of petroleum resin itself, making the production and application of petroleum resin developing slowly. China's petroleum resin production plant to C9 petroleum resin-based, accounting for 70% of the total production capacity, C5 petroleum resin accounted for 30%. Most of the production scale is small, the variety is single, the product quality is not high, especially the product color, softening point and other major quality indicators are unstable.
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