C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/419, 402/425
C08F 4/62 (2006.01) C08F 36/04 (2006.01) C08F 136/04 (2006.01)
Patent
CA 1124945
Abstract There is disclosed a method for copolymerizing cis-1,3-pentadiene and trans-1,3-pentadiene to prepare cis-1,4 polypentadienes. Other conjugated diolefins, including butadiene, isoprene, 2-ethyl-1,3-butadiene and 2-methyl-1,3-pentadiene also may be copolymerized with the cis-1,3-pentadiene isomer to prepare elastomeric copolymers. There is also disclosed a method for the copolymerization of isoprene with trans-1,3-pentadiene. There is also disclosed the preparation of very high cis 1,4 polypentadiene which comprises polymerizing cis 1,3-pentadiene. The polymerization catalyst employed in all of these polymerizations is a ternary catalyst system comprising (a) an organometallic compound selected from the group consisting of aluminum trialkyls, magnesium dialkyls and zinc dialkyls, (b) a soluble chro- mium compound selected from the group consisting of chromium salts of organic acids containing from 2 to 20 carbon atoms, organic complex compounds of chromium con- taining tridentate ligands and .pi.-bonded organochromium compounds, and (c) a member selected from the group of dialkyl hydrogen phosphites, diaryl hydrogen phosphites and tris(2-chloro ethyl)phosphite. There is also disclosed as a composition of matter a catalyst comprising (a) an organometallic compound selected from the group consisting of aluminum trialkyls, magnesium dialkyls and zinc dialkyls, (b) a soluble chromium compound selected from the group consisting of chromium salts of organic acids containing from 2 to 20 carbon atoms, organic complex compounds of chromium con- taining tridentate ligands and .pi.-bonded organochromium compounds, and (c) a member selected from the group of dialkyl hydrogen phosphites, diaryl hydrogen phosphites and tris(2-chloro ethyl)phosphite.
322254
Suchma Charles J.
Throckmorton Morford C.
Smart & Biggar
The Goodyear Tire & Rubber Company
LandOfFree
Copolymerization of conjugated diolefins using a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Copolymerization of conjugated diolefins using a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copolymerization of conjugated diolefins using a... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-824794