C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1, 402/5.5
C08F 14/06 (2006.01) C08F 6/16 (2006.01) C08F 6/24 (2006.01)
Patent
CA 1107431
168.105-Can. NLJr ABSTRACT OF THE DISCLOSURE In the process for steam-stripping residual monomer from an aqueous polymer dispersion comprising injecting steam into an aqueous polymer dispersion contain- ing residual monomers and the customary amounts of emulsi- fiers and/or protective colloids, said dispersion having a solids content of from 15% to 55% by weight with simultaneous evacuation of the gas space above the dispersion whereby said gas space is maintained at a subatmospheric pressure and said residual monomers are volatilized, the improvement consisting of injecting a sufficient volume of steam into said aqueous polymer dispersion whereby from 5% to 50% by weight of the injected steam passes through said dispersion uncondensed, thereby substantially preventing formation of foam above said dispersion.
312389
Balwe Thomas
Bauer Johann
Birke Johann
Rostock Kai
Wiedholz Rudolf
Macrae & Co.
Wacker-Chemie Gmbh
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