Back to results
US 8,507,641 B2Granted
Production of vinylidene-terminated and sulfide-terminated telechelic polyolefins via quenching with disulfides
AssigneeChevron Oronite Company LLC
InventorCasey D. Stokes
Life of this patent
Estimating the term…
Abstract
Provided herein are methods for preparing vinylidene-terminated polyolefins. Further provided herein are sulfide-terminated polyolefins.
Claims52
A method for preparing a compound of formula V:
- wherein:
- R1 is a polyolefin group;
- and
- RC2 is alkyl, aryl, aralkyl, alkaryl, substituted alkyl, or substituted aryl;
- comprising:
- (a) ionizing a polyolefin in the presence of a Lewis acid or mixture of Lewis acids to form an ionized polyolefin;
- (b) reacting the ionized polyolefin with one or more compounds of formula VI:
- RA—S—S—RB VI
- to form an intermediate;
- wherein RA and RB are each, independently, alkyl, aryl, aralkyl, or alkaryl;
- and
- (c) reacting the intermediate from step (b) with one or more compounds of formula VII:
- RC2—SH VII.
10 more elements
A method for preparing a vinylidene terminated polyolefin, comprising:
- (a) ionizing a polyolefin in the presence of a Lewis acid or mixture of Lewis acids to form an ionized polyolefin;
- (b) reacting the ionized polyolefin from step (a) with one or more disulfides to form an intermediate;
- and
- (c) reacting the intermediate of step (b) with one or more alcohols or amines.
1 more element
Dependencies are inferred from the claim text.