C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/321, 400/914
C08F 236/02 (2006.01) C08F 236/04 (2006.01) C08L 9/00 (2006.01) C08L 41/00 (2006.01)
Patent
CA 1198547
ABSTRACT OF THE DISCLOSURE The present invention relates to a free radical copolymerization process for the preparation of sulfonate containing water insoluble co- or terpolymers, wherein the resultant co- or terpolymers have an ?n as measured by GPC of 5,000 to 200,000 and these co- or terpolymers have at least 0.5 weight percent of chemically combined sulfur therein, are substantially gel free, thermally stable, and stable oxidatively. The free radical copolymerization process of the instant invention can be generally described as a free radical emulsion polymerization of at least one conjugated diene with a sulfonate monomer which is water soluble, at a temperature sufficient to cause polymerization, wherein the initiator is preferably based on a peroxide initiator accelerated by a reducing agent, and suitable surfactants are employed. Upon completion of the free radical polymerization, the resultant latex is coagulated and the water insoluble elastomer polymer is recovered.
369240
Lenz Robert W.
Lundberg Robert D.
Oster Bernd
Siadat Bahram
Weiss Robert A.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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