Carbocationic catalysts and process for using said catalysts

Details Carbocationic catalysts and process for using said catalysts Carbocationic catalysts and process for using said catalysts

1994-11-07

1996-04-09

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526196, 5263487, 525314, 525319, 502150, 502152, 502202, 502203, C08F 452, C08F 1010

Patent

active

055063160

ABSTRACT:
A living carbocationic catalyst composition comprising an initiator of a tertiary alkyl halide, a tertiary aralkyl halide or polymeric halide a co-initiator of a methylaluminum or methylboron compound, and a solvent medium with a dielectric constant between 2.5 and 7 is used to produce narrow molecular weight distribution polymers particularly isobutylene polymers.

REFERENCES:
patent: 4276394 (1991-06-01), Kennedy
patent: 4278822 (1981-07-01), Verstrate
patent: 4910321 (1990-03-01), Kennedy
patent: 4929683 (1990-05-01), Kennedy
patent: 4946899 (1990-08-01), Kennedy et al.
patent: 5169914 (1992-12-01), Kaszas
patent: 5350819 (1994-09-01), Shaffer
M. Gyor, et al. Polym. Prepr. Amer. Chem. Soc. 33(1) 158 (1992).
Kennedy, et al. "Carbocationic Polymerization in the Presence of Sterically Hindered Bases . . . " J. Macromol. Sci-Chem., A 18(1), pp. 119-128 (1982).
Living Cationic Polymerization of .alpha.-methyl Styrene, Matyjaszewski, et al.

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