C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 4/64 (2006.01) C08F 16/12 (2006.01) C08F 26/02 (2006.01) C08F 26/06 (2006.01) C08F 30/02 (2006.01) C08F 30/08 (2006.01) C08F 36/20 (2006.01)
Patent
CA 2128691
2128691 9412547 PCTABS00032 Catalysts derived from the reaction of Cp*2ZrMe2 with B(C6F5)3 or [N,N-dimethylanilinium][B(C6F5)4] (denoted as [Cp*2ZrMe]+X-, Cp* = pentamethylcyclopentadienyl, X = B(C6F5)4 or CH3B(C6F5)3) are active for the homopolymerization of functionalized dienes and alpha-olefins such as 4-TMSO-1,6-heptadiene (TMSO = trimethylsiloxy), 5-TBDMSO-1-pentene (TBDMSO = tert-butyldimethylsiloxy), 5-N,N-diisopropylamino-1-pentene, 5-diphenylphosphino-1-pentene and N-(1-penten-4-yl)carbazole. Other metallocene catalysts such as [rac-(EBTHI)ZrMe]+X- and [EBIZrMe2]+X- (EBTHI = ethylene-1,2-bis(n5-4,5,6,7-tetrahydro-1-indenyl, EBI = ethylene-1,2-bis(1-indenyl)) are active polymerization catalysts for the polymerization of functionalized olefins although they are more easily poisoned by silyl ethers; [rac-(EBTHI)ZrMe]+X- catalysts polymerize 4-TBDMSO-1,6-heptadiene and 5-N,N-diisopropylamino-1-pentene. A variety of other silyl ethers were polymerized. Preliminary 13C NMR analyses of polymers obtained from the functionalized alpha-olefins with [(EBTHI)ZrMe]+X- catalysts are consistent with highly isotactic microstructures. Predominantly syndiotactic polymers are produced at -25 ·C in the presence of [Cp*2ZrMe]+X- catalysts which is consistent with chain end control. Treatment of the polysilylethers with HCl affords novel polyalcohols. Addition of HCl to poly(5-N,N-diisopropylamino-1-pentene) yields the corresponding polyelectrolyte. Metallocene/methylaluminoxane catalysts are active for the polymerization of alpha-olefins containing silyl ether groups.
Coates Geoffrey W.
Kesti Michael R.
Waymouth Robert M.
Board Of Trustees Of The Leland Stanford Junior University (the)
Gowling Lafleur Henderson Llp
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