Method for producing polyisobutene

Details Method for producing polyisobutene Method for producing polyisobutene

2007-05-15

2007-05-15

Teskin, Fred M. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S209000, C526S212000, C526S237000, C526S348700, C585S521000, C585S525000

Reexamination Certificate

active

10542928

ABSTRACT:
A process is described for preparing polyisobutene having a content of terminal vinylidene groups of at least 75 mol % by polymerizing isobutene or isobutenic hydrocarbon mixtures in the liquid phase in the presence of a boron trifluoride complex catalyst of the compositionin-line-formulae description="In-line Formulae" end="lead"?(BF3)a.L1b.L2c.L3din-line-formulae description="In-line Formulae" end="tail"?where L1is water, a primary C1–C5-alkanol and/or a secondary C3–C5-alkanol, L2is at least one aldehyde and/or one ketone, L3is an ether having at least 5 carbon atoms, a secondary alkanol having at least 6 carbon atoms, a primary alkanol having at least 6 carbon atoms and/or a tertiary alkanol, the b:a ratio is in the range from 0.9 to 3.0, the c:a ratio is in the range from 0.01 to 0.5, and the d:a ratio is in the range from 0 to 1.0.

REFERENCES:
patent: 5286823 (1994-02-01), Rath
patent: 6407186 (2002-06-01), Rath et al.
patent: 27 02 604 (1978-07-01), None
patent: 0 628 575 (1994-12-01), None
patent: 0 896 967 (1999-02-01), None
patent: 1 026 175 (2000-08-01), None
patent: 1 081 165 (2001-03-01), None
patent: 93/10063 (1993-05-01), None
patent: 02/40553 (2002-05-01), None
Research Disclosure Database No. 424060, “Polymerisation Process,” Research Disclosure Journal ISSN 0374-4353, Kenneth Mason Publications Ltd., UK, Aug. 1999 (Anonymous).
English language translation of CN 1323841, published Nov. 28, 2001.

Affiliated with

Also associated with

Rating

Method for producing polyisobutene 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 producing polyisobutene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing polyisobutene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3751753