Process for production of high-isoprene butyl rubber

Details Process for production of high-isoprene butyl rubber Process for production of high-isoprene butyl rubber

2007-08-31

2008-11-04

Teskin, Fred M (Department: 1796)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S105000, C525S332200, C525S332800, C525S340000, C525S350000, C525S355000, C525S374000, C525S384000, C525S385000, C526S336000, C526S339000

Reexamination Certificate

active

07446151

ABSTRACT:
The present invention relates to a continuous process for producing polymers at conversions ranging from 50% to 95% having a Mooney viscosity of at least 25 Mooney-units and a gel content of less than 15 wt. % containing repeating units derived from at least one isoolefin monomer, more than 4.1 mol % of repeating units derived from at least one multiolefin monomer and optionally further copolymerizable monomers in the presence of AlCl3and a suitable proton source (e.g. water) or cationogen and at least one multiolefin cross-linking agent wherein the process is conducted in the absence of transition metal compounds and organic nitro compounds.

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Rubber Chemistry & Technology 49, (month unavailable) 1976, pp. 960-966, W.A. Thaler and D.J. Buckley Sr., Meeting of the Rubber Division, ACS, Cleveland, Ohio, May 6-9, 1975, High-Molecular-Weight, High-Unsaturation Copolymers of Isobutylene and Conjugated Dienes. I. Synthesis.

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