C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/474
C08F 136/06 (2006.01) C08F 4/48 (2006.01)
Patent
CA 1259745
ABSTRACT OF THE DISCLOSURE A polybutadiene having an average 1,2-bond content of 18 to 32% by mole, a branched polymer chain content of 60% by weight or more and a Mooney viscosity at 100°C of 40 to 90, the viscosity of a 5% by weight concentration solution of this polybutadiene in styrene at 25°C being 60 to 90 cps, and a process for preparing the polybutadiene comprising starting the polymerization of 1,3-butadiene in an inert hydrocarbon solvent in the presence of a Lewis basic compound and an organolithium compound, the latter compound being in an amount of 0.5 to 3 millimoles per 100 g of 1,3-butadiene, at a temperature selected from the range of 30 to 80°C, carrying out the polymerization by controlling the temperature so that the temperature at the end of polymerization may be 5 to 40°C higher than the temperature at the start of polymerization, and adding to the resulting polymer solution a poly- functional halogen compound in an amount of 0.6 to 1 equivalent per equivalent of the organolithium compound to further react the polymer with the polyfunctional halogen compound.
475159
Imai Akio
Okamoto Yasushi
Saito Masatoshi
Fetherstonhaugh & Co.
Sumitomo Chemical Company Limited
LandOfFree
Polybutadiene and process for preparing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polybutadiene and process for preparing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polybutadiene and process for preparing the same will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1304169