Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1976-10-29
1977-07-26
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
252429B, 526143, 526308, C08F 478, C08F 3204, C08F 3206
Patent
active
040384713
ABSTRACT:
There is disclosed a method which comprises polymerizing a cycloolefin selected from the group consisting of cyclooctene and 1,5-cyclooctadiene by subjecting said cycloolefin to a catalyst comprising (A) a tungsten halide salt of the general formula R.sub.m.sub.-n WX.sub.n wherein X represents chlorine or bromine and R is selected from the group consisting of alkoxy, haloalkoxy, aryloxy, alkaryloxy, and acetyl acetonyl radicals containing up to 20 carbon atoms; m being 6 when X= Cl or 5 when X = Br; and wherein n may be 3 to 6 inclusive when X = Cl or 3 to 5 inclusive when X = Br and (B) an organoaluminum compound of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 may independently represent an alkyl or aralkyl radical containing up to 20 carbon atoms or a halogen atom, and (C) a hydroxyl compound of the formula ROH wherein R is selected from the group consisting of alkyl, haloalkyl, cycloalkyl, aralkyl, alkoxyalkyl and aryl containing up to 20 carbon atoms, and (D) a hindered phenol of the formula ##STR2## wherein R.sub.1 represents an alkyl group with a tertiary carbon attached to the aromatic ring, and R.sub.2, R.sub.3 and R.sub.4 represent either a hydrogen atom or an alkyl group containing up to 20 carbon atoms, to form polyalkenamers having a cis-vinylene content of at least about 85 percent, and wherein the molar ratio of A:B:C:D ranges from 1:2-8:0.5-3:3-24.
REFERENCES:
patent: 3652487 (1972-03-01), Ward et al.
patent: 3943116 (1976-03-01), Bell
patent: 3974094 (1976-08-01), Streck et al.
Brunner F. W.
Clowney J. Y.
Smith Edward J.
The Goodyear Tire & Rubber Company
LandOfFree
Method for preparing high-cis polyalkenamers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for preparing high-cis polyalkenamers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing high-cis polyalkenamers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-727404