Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-05-24
2005-05-24
Teskin, Fred (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S164000, C526S335000, C526S340400
Reexamination Certificate
active
06897270
ABSTRACT:
A continuous process for producing conjugated diene polymers comprising the steps of contacting, within an hydrocarbon solvent and within a continuous reactor, conjugated diene monomer and a catalyst composition prepared by combining: (a) a lanthanide compound, (b) an alkylating agent, and (c) a halogen-containing compound, and maintaining a non-ideal flow pattern within the continuous reactor so that 10% of the reagents entering the reactor at a reference time t0are still present within the continuous reactor at a time t0+xtrt, where trtis the residence time corresponding to ideal flow within the continuous reactor and x is a numeral greater than 1.5.
REFERENCES:
patent: 4619982 (1986-10-01), Jenkins
patent: 4668773 (1987-05-01), Marks et al.
patent: 4689368 (1987-08-01), Jenkins
patent: 4699960 (1987-10-01), Gordini et al.
patent: 4716257 (1987-12-01), Marks et al.
patent: 4736001 (1988-04-01), Carbonaro et al.
patent: 4801666 (1989-01-01), Marks et al.
patent: 5182244 (1993-01-01), Pettijohn
patent: 5260244 (1993-11-01), Pettijohn
patent: 5567784 (1996-10-01), Wieder et al.
patent: 5686371 (1997-11-01), Ansell et al.
patent: 5798416 (1998-08-01), Kamata et al.
patent: 5844050 (1998-12-01), Fukahori et al.
patent: 6391990 (2002-05-01), Ishino et al.
patent: 6399726 (2002-06-01), Windisch et al.
patent: 6441107 (2002-08-01), Muruganandam et al.
patent: 6780948 (2004-08-01), Rachita et al.
patent: 20010018394 (2001-08-01), Brown
patent: 20020183467 (2002-12-01), Windisch et al.
patent: 20030069365 (2003-04-01), Grun et al.
patent: 20030134999 (2003-07-01), Windisch et al.
patent: 20030162920 (2003-08-01), Windisch et al.
patent: 20030176573 (2003-09-01), Grun et al.
patent: 20040147694 (2004-07-01), Sone et al.
patent: 1 010 710 (2000-06-01), None
patent: WO 9604323 (1996-02-01), None
patent: WO 00 69928 (2000-11-01), None
“The Characteristics of Lanthanide Coordination Catalysts and the Cis-Polydienes Prepared Therewith” by Shen Zhiquanet al., J. of Polymer Science: Polymer Chemistry Edition, vol. 18, pp. 3345-3357 (1980).
“Polymerization of Dienes on Lanthanide Containing Catalytic Systems” by Marina et al., Polymer Science, vol. 26, No. 6, pp. 1251-1268 (1984).
“Polymerization of Butadiene and Isoprene with Lanthanide Catalysts: Characterization and Properties of Homopolymers and Copolymers” by Hsieh, Rubber Chemistry and Technology, vol. 58, pp. 117-145 (1985).
“Modification of Neodymium High Cis-1, 4-Polybutadiene with Tin Compounds” by Hattori et al., J. Elastomers and Plastics, vol. 23, pp. 135-151 (Apr. 1991).
“Chemical Modification of Neodymium High Cis-1,4-POlybutadiene with Styreneoxide,” by Hattori et al., Polymers for Advanced Technology, vol. 4, pp. 450-456 (1993).
Antkowiak Thomas A.
Luo Steven
Masaki Koji
Miller H. Jerrold
Ozawa Yoichi
Bridgestone Corporation
Reginelli Arthur M.
Teskin Fred
LandOfFree
Continuous process for the production of conjugated diene... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous process for the production of conjugated diene..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process for the production of conjugated diene... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3369226