A procedure for preparing linear polymers based on unsaturated monomers of formula generl cri rii = criiiriv (Machine-translation by Google Translate, not legally binding)

摘要

A process for preparing linear polymers based on unsaturated monomers of the general formula C RIRII = C RIIIRIV wherein RI is different from RII and RII is different from RIV, and at least RI and/or RII are different from both RIII and RIV (R radicals each represent hydrogen, deuterium or tritium or alkyl groups, alkenyl, aryl, arylalkyl or cycloaliphatics, or organic groups containing atoms other than hydrogen, such as O, S, N, P, halogen, Si, Sn), which polymers comprise macromolecules in which at least one of the two asymmetric C atoms of each successive monomer unit, has the same steric configuration, at least for portions of the chain, a process comprising contacting said monomers with stereospecific catalysts and fractionating the polymer blends having different degree of steric regularity thus obtained by solvent extraction. (Machine-translation by Google Translate, not legally binding)