METHOD OF PREPARING PIPERYLENE OLIGOMERS Russian patent published in 1999 - IPC

FIELD: chemistry of polymers. SUBSTANCE: oligomers are prepared by cooligomerization of piperylene, pyrolysis diene fractions containing five, eight or ten carbon atoms in the presence of catalyst. Said oligomers are used as film-forming agents for varnished products (drying oils, varnishes and paints) and for manufacture of coatings and impregnating compounds. Catalyst is homogeneous catalyst complex prepared by reacting AlCl₃ with unsymmetrical ethers of general formula: ROR′ wherein R is methyl, ethyl and isopropyl, and R′ is tert-butyl or phenyl in aromatic solvent at AlCl₃:ROR′ molar ratio of 1.0:0.5-1.5, respectively in amount of 0.25-1.50 wt.%. EFFECT: simplified technology of preparing catalyst, increased yield of oligomeric products using cheap pyrolysis stock and high quality of varnished products manufactured therefrom. 9 ex, 2 tbl