Main > POLYMERS > Poly(Isobutene) > Co.: USA. E. (Producer) > Patent > Claims Etc > Claim 1 Catalyst System Formula > ##STR16##, R1,R2,R3,G=H Etc & > No. of ---(CH.sub.2 --CG.sub.2)-- > >1 Incorporated in Polymer Chain > , NCA=[(M)m+ Q.1. . . Q.n].d-, > M=Metal, Q1 to Qn=(Un)Bridged > Hydride Radicals Etc., m=Valence > of M, n=No. of Ligands Q, d>1. > Claim 4 Catalyst System (a) > Cation Compn Ge, Sn or Pb & (b) NCA > Claim 5 Catalyst System Formulae

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Claim 5 Catalyst System Formulae's subsections
E, F, G and H: ##STR19##, B=

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