C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/296, 117/31,
C08F 2/02 (2006.01) C09J 7/02 (2006.01)
Patent
CA 1265890
557-2871 ABSTRACT OF THE DISCLOSURE The invention relates to a process and a polymer prepared by the process. The process is a process of polymerizing one or more free radical polymerizable vinyl compounds which may be in the liquid or solid state which process comprises: a) continuously feeding to a wiped surface reactor raw materials which comprise the vinyl compounds and at least two initiators for free radical polymerization under the following conditions: i) all raw materials being fed substantially free of oxygen, and ii) any liquid vinyl compounds having a viscosity less than about 4,000 centipoise being fed under a pressure at least as high as the vapor pressure of the combined raw materials at the temperature to which the exotherm of the free radical poly- merization brings them in the reactor; b) reacting the raw materials to desired conversion; and c) continuously withdrawing a polymeric material from the reactor. This invention provides a new process for continuous, bulk polymerization of vinyl compounds, particularly of pressure sensitive adhesives and for direct coating of the polymerized PSA onto useful articles without the need for solvents. 33379 CAN SA
477221
Barber Ronald L.
Kotnour Thomas A.
Krueger Walter L.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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