Method for preparation of polyolefins containing exo-olefin chain ends
AssigneesChevron Oronite Company LLC, The University of Southern Mississippi
InventorsCasey Stokes, Kelby Simison, Robson Storey, James Harrison
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Abstract
The present invention is directed to a method for preparation of polyolefins containing exo-olefin chain ends. The method involves quenching a cationic quasi-living polyolefin polymer system with one or more hindered secondary or tertiary amines.
Claims47
A method for preparing a polyolefin containing one or more exo-olefinic end groups on the polymer chain, comprising quenching a cationic quasi-living polyolefin polymer system with one or more hindered secondary or tertiary amines containing only carbon, hydrogen, and nitrogen atoms, provided the hindered secondary or tertiary amines are not:
- (a) Triethylamine;
- (b) Tri-n-butylamine;
- (c) Trihexylamine;
- (d) Triisooctylamine;
- (e) 2-phenylpyridine;
- (f) 2,3-cyclododenopyridine;
- (g) Di-p-tolylamine;
- (h) Quinaldine;
- and
- (i) 1-pyrrolidino-1-cyclopentene.
A method for preparing a polyolefin containing one or more exo-olefinic end groups on the polymer chain, comprising quenching a cationic quasi-living polyolefin polymer system with one or more hindered secondary or tertiary amines containing only carbon, hydrogen, and nitrogen atoms, wherein the hindered secondary or tertiary amine compounds are pre-reacted with a Lewis acid, and provided the hindered secondary or tertiary amines are not:
- (a) Triethylamine;
- (b) Tri-n-butylamine;
- (c) Trihexylamine;
- (d) Triisooctylamine;
- (e) 2-phenylpyridine;
- (f) 2,3-cyclododenopyridine;
- (g) Di-p-tolylamine;
- (h) Quinaldine;
- and
- (i) 1-pyrrolidino-1-cyclopentene.
Dependencies are inferred from the claim text.