Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1994-10-31
1995-12-12
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526332, C08F 200
Patent
active
054750695
ABSTRACT:
Process for the polymerization of selected vinyl ethers catalyzed by yttrium or rare earth metal perfluoroalkylsulfonates. A preferred perfluoroalkylsulfonate anion is triflate (trifluoromethanesulfonate). The resulting polymers are useful as tackifiers in adhesives as well as in other uses (e.g., plasticizers, viscosity modifiers).
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Cho, C. G. et al., "Initiation of Vinyl Ether Polymerization by Trimethylsilyl Triflate, Dimethyl Sulfide, and Adventitous Water", Macromolecules, 25, 2081-2085 (1992).
Cho, C. G. et al, "Cationic Polymerization of Isobutyl Vinyl Ether: Livingness Enhancement by Dialkyl Sulfides", Macromolecules, 23, 1918-1923 (1990).
U.S. Ser. No. 08/283,108 filed Jul. 29, 1994.
E. I. Du Pont de Nemours and Company
Sarofin N.
Schofer Joseph L.
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