Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-10-23
2007-10-23
Lu, Caixia (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S146000, C526S147000, C526S161000, C526S172000, C526S139000, C526S141000, C502S103000, C502S121000, C502S122000, C502S123000
Reexamination Certificate
active
11130106
ABSTRACT:
This invention relates to a process for producing a polymeric product by the polymerisation of at least one olefinic compound in the form of an olefin or a compound including an olefinic moiety by contacting the at least one olefinic compound with a polymerisation catalyst. The catalyst comprises the combination of a source of a Group IV to VI transition metal; and a ligating compound of the formulain-line-formulae description="In-line Formulae" end="lead"?(R1)mX1(Y)X2(R2)n.in-line-formulae description="In-line Formulae" end="tail"?The process is characterised therein that when R1and R2are independently a hydrocarbyl group or a heterohydrocarbyl group which contains at least one non-polar substituent, the olefinic compound is contacted with the polymerisation catalyst at a reaction temperature from and above 70° C.; and where R1and R2are independently a hydrocarbyl group or a heterohydrocarbyl group which contains no substituent, the olefinic compound is contacted with the polymerisation catalyst at a reaction temperature from and above 90° C.
REFERENCES:
patent: 6800702 (2004-10-01), Wass
patent: 7022788 (2006-04-01), Wass
patent: 2005/0113622 (2005-05-01), Drent et al.
patent: 2006/0211903 (2006-09-01), Blann et al.
Blann Kevin
De Wet-Roos Deon
Dixon John Thomas
Du Toit Aletta
Joubert Dawid Johannes
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Lu Caixia
Sasol Chemical Industries Limited
LandOfFree
Polymerisation of olefinic compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polymerisation of olefinic compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymerisation of olefinic compounds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3872486