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US 7,001,966 B2Granted
Method for the production of isobutene polymers
AssigneeBASF SE
InventorsGabriele Lang, Arno Lange, Hans Peter Rath, Helmut Mach
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Abstract
The present invention relates to a process for preparing an isobutene polymer using a cyclopentene derivative as initiator and to the isobutene polymer obtainable by means of the process and to particular functionalization products thereof.
Claims14
A process for preparing an isobutene polymer comprising
- reacting
- a) isobutene and
- b) a compound of the formula I
- in the presence of
- c) a Lewis acid
- to obtain a living isobutene polymer having at least one distal end,
- wherein
- X is halogen, C1–C6-alkoxy or C1–C6-acyloxy and
- n is 1, 2 or 3.
6 more elements
An isobutene polymer terminated at at least one end of the molecule by a group of the formula II
- or a functionalization product thereof, obtainable by
- i) hydrosilylation,
- ii) hydrosulfurization,
- iii) electrophilic substitution on aromatics,
- iv) epoxidation and, optionally, reaction with nucleophiles,
- v) hydroboration and, optionally, oxidative cleavage,
- vi) reaction with an enophile in an ene reaction,
- vii) addition of halogens or hydrogen halides or
- viii) hydroformylation,
- wherein n is 1, 2 or 3.
7 more elements
Dependencies are inferred from the claim text.