Ceskoslovenska Akademie Ved

Jan Pecka

Miroslav Marek

Ludek Toman

Method for the cationic polymerization of at least one olefinic monomer and more particularly the homopolymerization of a mono-olefinic monomer such as isobutylene and the copolymerization thereof with a di-olefinic monomer (diene) such as butadiene and optionally another mono-olefinic monomer in the presence of, as initiator of a halide of tetravalent vanadium, titanium and zirconium, an activator and under the influence of visible ultraviolet or infra-red light.

Method for controlled radiation polymerization of olefinic monomers

Method for controlled radiation polymerization of olefinic monomors

Method of radiation polymerization and copolymerization of isobutylene

Method for radiation polymerization and copolymerization of isobutylene

Process for polymerization and copolymerization of momo-olefinic monomers, such as isobutylene, either with one another or with dienes, catalyzed by tetravalent metal halides, and initiated or accelerated by the action of ultraviolet, visible or infrared light. The polymerization or copolymerization can be affected with or without solvent. Suitable solvents are aliphatic, aromatic or halogenated hydrocarbons. The polymerization is carried out at a temperature in a range of from about -140.degree. C. to about +30.degree. C.

Growing community of inventors

Prague, Czechia

Jan Pecka