Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1994-06-29
1995-11-07
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
502155, 502157, 526217, 526335, 526338, 526340, 526347, 5263471, C08F 448, C08F23610
Patent
active
054649145
ABSTRACT:
A liquid hydrocarbon soluble difunctional organolithium initiator (DFI) is reacted with an anionically polymerizable monomer, such as isoprene or 1,3-butadiene, in the presence of a diamine or a triamine to form a polymer having low polydispersity and high tensile strength. The DFI is prepared by reacting a dialkenylarylene compound with an alkyllithium in a nonpolar solvent and in the presence of sufficient quantities of a trisubstituted amine to prevent precipitation of the DFI in the solvent.
REFERENCES:
patent: 3663634 (1972-05-01), Morton
patent: 3668263 (1972-06-01), Morrison
patent: 3725368 (1973-04-01), Morrison
patent: 3766964 (1973-12-01), Morrison
patent: 4138536 (1979-02-01), Hsieh
patent: 4196154 (1980-04-01), Tung et al.
patent: 4427837 (1984-01-01), Tung
patent: 4960842 (1990-10-01), Lo
patent: 5089572 (1992-02-01), Marchand et al.
"An Efficient Bifunctional Lithium-Organic Initiator to Be Used in Apolar Solvents" listed in Polymer, 1982, vol. 23, Dec., by Pierre Lutz, Emile Franta and Paul Rempp.
"Bifunctional Anionic Iniators: A Critical Study and Overview" listed in Makromol Chem. 186, 2017-2024 (1985) by Friedhelm Bandermann, Hans-Dieter Speikamp, Ludwig Weigel.
"A New Difunctional Anionic Initiator" listed in Macromolecules vol. 10, No. 2, Mar.-Apr. 1977 by R. P. Foss, H. W. Jacobson and W. H. Sharkey.
"Addition of Sec-butylithium to m-diisopropenylbenzene" listed in Polymer 1979 Vo. 20 Sep. by G. Gordon Cameron and Gavin M. Buchan.
Gatzke Arnold L.
Lo Grace Y.
The Dow Chemical Company
Zitomer Fred
LandOfFree
Preparation of a low polydisperse polymer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of a low polydisperse polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of a low polydisperse polymer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-198011