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US 2010/0168335 A1Published application
Method for producing polymer mixtures
AssigneeInnogel AG
InventorsRolf Muller, Federico Innerebner
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Abstract
The invention relates to a process for the advantageous production of polymer mixtures with specific molecular weight distributions, having a quantitatively low short-chained proportion and substantially improved processing characteristics, the working up steps during or after the synthesis of the main portion of the polymer mixture being used to produce the mixture.
Claims28
Process for the production of a polymer mixture M, wherein the polymer mixture comprises a polymer P1 and a polymer P2, comprising the steps of
- using as polymer P1 a polymer that has an average molecular weight Mn of >20,000 g/mol and at least one block of >10 monomers M1, and
- using as polymer P2 a polymer that has a viscosity in the range of 0.1 to <3,000 mPas above the melting point and comprises at least one block of >10 monomers M2, wherein the monomers M1 and M2 are identical,
- adding polymer P2 is to polymer P1 in a reactor,
- the proportion of P2 in % by weight based on P1 and P2 is in the range of 0.1 to 25, and
- using devices for the synthesis and working up of synthesized polymers for the process with an output for each production line being >1 to/h.
2 more elements
Dependencies are inferred from the claim text.