Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1994-03-15
1994-09-20
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526160, 5263482, 5263484, 5263486, 526351, 502152, 556 12, C08F 464
Patent
active
053490320
ABSTRACT:
A metallocene having an asymmetric ligand which is represented by the formula below and its enantiomer: ##STR1## and a process for producing a polyolefin using the same as a catalyst component. The metallocene and its enantiomer are particularly effective in the production of highly stereospecific polyolefins.
REFERENCES:
patent: 5017714 (1991-05-01), Welborn, Jr.
patent: 5071808 (1991-12-01), Antberg et al.
patent: 5126303 (1992-06-01), Resconi et al.
patent: 5132262 (1992-07-01), Rieger et al.
Ewen, J. A., et al., "Syndiospecific Propylene Polymerizations with Group 4 Metallocenes", J. Am. Chem. Soc., vol. 110, pp. 6255-6256, 1988.
Song, X., et al., "Stereospecific Polymerization of Olefins with ansa-Metallocene Derivatives/Methylaluminoxane Catalyst Systems," Polymer Preprints, Japan, vol. 40, No. 2, p. 265, 1991.
Collins, S., et al., "Variation of Poly(propylene) Microtacticity by Catalyst Selection", Organometallics, vol. 10, pp. 2061-2068, 1991.
Mise, Takaya et al., "Excellent Stereoregular Isotactic Polymerizations of Propylene with C.sub.2 -Symmetric Silylene-Bridged Metallocene Catalysts", Chemistry Letters, pp. 1853-1856, 1989.
Ewen, J. A., et al., "Crystal Structures and Stereospecific Propylene Polymerizations with Chiral Hafnium Metallocene Catalysts", J. Am. Chem. Soc., vol. 109, pp. 6544-6545, 1987.
Ewen, J. A., "Mechanisms of Stereochemical Control in Propylene Polymerizations with Soluble Group 4B Metallocene/Methylalumoxane Catalysts", J. Am. Chem. Soc., vol. 106, pp. 6355-6364, 1984.
Inazawa Shintaro
Kibino Nobuyuki
Miyake Shigenobu
Monoi Takashi
Ohira Hiroyuki
Schofer Joseph L.
Showa Denko K.K.
Wu David
LandOfFree
Metallocene and process for producing polyolefin using 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 Metallocene and process for producing polyolefin using the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metallocene and process for producing polyolefin using the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2429961