Process for the preparation of isoolefin copolymers

Details Process for the preparation of isoolefin copolymers Process for the preparation of isoolefin copolymers

2005-01-25

2005-01-25

Harlan, Robert D. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S113000, C526S158000, C526S348700, C502S124000, C502S132000

Reexamination Certificate

active

06846885

ABSTRACT:
The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides or hafnium halides or mixtures thereof and organic nitro compounds, especially for the preparation of butyl rubbers, as well as isoolefin copolymers composed of isobutene, isoprene and, optionally, further monomers.

REFERENCES:
patent: 2682531 (1954-06-01), Ernst et al.
patent: 5663470 (1997-09-01), Chen et al.
patent: 6015841 (2000-01-01), Langstein et al.
patent: 20010014726 (2001-08-01), Langstein et al.
patent: 0 279 456 (1988-08-01), None
patent: 0 279 456 (1988-08-01), None
patent: 0 556 965 (1993-08-01), None
patent: 9428037 (1994-12-01), None
Presented at a meeting of the Rubber Division, American Chemical Society, Cleveland, Ohio. May 6-9, 1975. Published in Rubber Chem. and Tech., 49 (month unavailable) 1976, pp. 960-966. High-Molecular-Weight, High-Unsaturation Copolymers of Isobutylene and Conjugated Dienes. I. Synthesis. W. A. Thaler and D. J. Buckley, Sr.

Affiliated with

Also associated with

Rating

Process for the preparation of isoolefin copolymers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of isoolefin copolymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of isoolefin copolymers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3373689