Method for preparing polyolefins containing vinylidene groups using azole compounds
申请人:Chevron Oronite Company LLC
公开号:EP1803741A1
公开(公告)日:2007-07-04
Disclosed is a method for preparing polyolefins containing vinylidine end groups from quasiliving carbocationically terminated polyolefin polymers by contacting the quasiliving carbocationically terminated polymer with a suitable azole quenching agent and substituted derivatives thereof.
Method for preparing polyolefins containing vinylidene end groups using nonaromatic heterocyclic compounds
申请人:Chevron Oronite Company LLC
公开号:EP1803748A1
公开(公告)日:2007-07-04
Disclosed is a method for preparing polyolefins containing vinylidine end groups from quasiliving carbocationically terminated polyolefin polymers by contacting the quasiliving carbocationically terminated polymer with a suitable nonaromatic heterocyclic ring quenching agent and substituted derivatives thereof.
Method for preparing polyolefins containing vinylidene end groups using polymeric nitrogen compounds
申请人:Chevron Oronite Company LLC
公开号:EP1803751A1
公开(公告)日:2007-07-04
Disclosed is a method for preparing polyolefins containing vinylidine end groups from quasiliving carbocationically terminated polyolefin polymers by contacting the quasiliving carbocationically terminated polymer with quenching agent selected from the group consisting of polypyrrole, polyvinylpyridine, polyphenothiazine, polyoxazine, and polypyrrole-co-thiophene and substituted derivatives thereof.
Polyisobutenyl sulfonates having low polydispersity
申请人:Chevron Oronite Company LLC
公开号:EP1932859A2
公开(公告)日:2008-06-18
The present invention provides for polyisobutenyl sulfonates, methods for preparing them, and composition employing them; wherein said polyisobutenyl sulfonates have improved low temperature and high temperature viscometric properties. The polyisobutenyl sulfonates are prepared by sulfonating polyisobutene and reacting the polyisobutenyl sulfonate with an alkali metal or alkaline earth metal, wherein the polyisobutene is characterized by having at least 90 mole percent methyl-vinylidene, a number average molecular weight of about 350 to 5,000, and a ratio of weight average molecular weight to number average molecular weight Mw/Mn of from about 1.01 to about 1.4.
Provided herein are methods for preparing a functionalized polyolefin from an unsaturated polyolefin containing one or more non-aromatic main-chain double bonds and for reducing the size and/or polydispersity index (i.e., increasing the homogeneity) of the unsaturated polyolefin.