China Drying Network News The preparation method of the relative molecular mass polyisobutylene in the boron trifluoride initiating system declared by Jilin Petrochemical Fine Chemicals Plant was authorized by the national invention patent. Based on the successful development of high-activity polyisobutylene synthesis technology for the boron trifluoride catalytic system, the invention achieved new breakthroughs in controlling the molecular weight of the polymerization and increasing the polymerization conversion rate by improving the catalyst formulation and polymerization process, and completed 2,000 tons. The experimental study of the relative molecular mass polyisobutylene plant in mid-year has laid a solid technical foundation for the further expansion of industrial production and installations.
At present, only the relative molecular mass polyisobutylene in the production of aluminum trichloride catalytic system can be used in China. Due to the limitation of the catalytic system and process technology, the product has low purity, wide distribution of relative molecular mass, and poor appearance. Due to the inability to reach medical grade and food grade requirements, the scope and number of applications have been greatly affected. In particular, the use of chewing gum bases in food-grade medium-molecular-weight polyisobutylenes is still unacceptable and can only rely on imported products.
The medium molecular weight polyisobutylene is a colorless, odorless, non-toxic semi-solid with excellent acid and alkali resistance, salt resistance, water resistance and aging resistance, and excellent air tightness and electrical insulation in adhesives. , food additives, waterproof materials, oil modification, electrical and pharmaceutical industries are widely used.
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