Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1989-10-06
1990-07-10
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526192, 526194, 526221, 526262, 526286, 5263031, 526312, 526328, 5263297, 526341, C08F 416, C08F 402, C08F 2014
Patent
active
049407600
ABSTRACT:
Group Transfer Polymerization (GTP) process for preparing a "living" polymer, the process comprising contacting under polymerizing conditions in a polymerization medium, at least one acrylic or maleimide monomer with an initiator which is a tetracoordinate organosilicon, organotin or organogermanium compound having at least one GTP initiating site and a catalyst which is or is a source of an anion selected from the group consisting of bifluoride, fluoride, cyanide, azide or a selected oxyanion, or a selected Lewis acid or Lewis base, the process further characterized in that the initiator or the anion or Lewis acid catalyst is chemically attached (grafted) to a solid support that is insoluble in the polymerization medium.
REFERENCES:
patent: 4588795 (1986-05-01), Dicker et al.
Sogah et al., Group Transfer Polymerization. Polymerization of Acrylic Monomers, Macromolecules, 20, 1473, 1987.
Grubbs et al., Organometallic Polymers as Catalysts Organometallic Polymers, Carraher, Jr., et al., (ed), Academic Press, N.Y., N.Y., 129 (1978).
Boettcher Fritz P.
Dicker Ira B.
Ebersole Richard C.
Hertler Walter R.
E. I. Du Pont de Nemours and Company
Schofer Joseph L.
Teskin F. M.
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