C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1127, 400/30
C08F 287/00 (2006.01) C08F 279/02 (2006.01)
Patent
CA 1129139
ABSTRACT OF THE DISCLOSURE The present invention relates to an improved process for the continuous mass polymerization of solutions comprising a alkenyl aromatic monomer having a diene rubber polymer dissolved therein comprising the steps of polymerizing said solution in a first reaction zone to about 15 to 50% conversion dispersing said diene rubber or rubber particles in a partially polymerized solution, followed by further polymeriza- tion said partially polymerized solution in a second polymerization zone to about 20 to 95% conversion the improvement comprising having present in said solution, as fed to said first reaction zone, a polymer of said monomers in an amount sufficient to control the size of said diene rubber particles.
347174
Mcfadden Fincham
Monsanto Company
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