Method and device for continuous production of polymers
AssigneeSiemens Axiva GmbH & Co. KG
InventorsDetlev Pysall, Olaf Wachsen, Thomas Bayer, Stefan Wulf
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Abstract
Process and apparatus for the continuous preparation of polymers Two reaction partners (starting materials) are stored in separate reservoirs 2, 3, 4 and 5 and are transported using overpressure via heated heat exchangers 11, 12 into a micromixer 18 by means of control and metering devices 6, 7, which can be metering pumps. In the heat exchangers 11, 12, the starting materials are heated, separately in each case, to the extent that during the mixing operation in the micromixer 18 the required reaction temperature is immediately reached. The polymerization takes place in a downstream tube reactor 20 which consists of tubes 21, 22, 23 which are connected in series.
Claims11
A process for the continuous preparation of polymers by free-radical polymerization in which at least two staring materials, one of monomers/solvent and another of initiator/solvent are conducted through a micromixer and combined and mixed with one another, which comprises the starting materials, prior to their entry into the micromixer (18), being preheated to the extent that they reach a required reaction temperature after entry into the micromixer (18), in which they are mixed with one another by diffusion and/or turbulence in such a manner that formation of bimodal molar mass distributions or insoluble high-molecular-weight fractions is suppressed and that a polymerization of monomers takes place in a tube reactor (20) downstream of the micromixer.
Dependencies are inferred from the claim text.