Vinylene carbonate polymers, a process for their preparation and their use
AssigneeHoechst Aktiengesellschaft
InventorsOtto Mauz, Klaus Sauber, Siegfried Noetzel
Life of this patent
Estimating the term…
Abstract
The invention relates to bead polymers based on vinylene carbonate which are distinguished, in particular, by high porosity and which are well suited as carrier materials for biologically active substances. The preparation of these bead polymers is carried out, according to the invention, in the presence of certain dispersion stabilizers.
Claims12
A polymer essentially composed of units which are derived from vinylene carbonate or a derivative thereof which is substituted by a monovalent hydrocarbon radical having up to 8 carbon atoms, and of at least one other monomer which can be copolymerized with it, the mean particle size of the polymer particles being in the range from 20 to 800 um, wherein the polymer particles have an essentially spherical shape and a mean pore diameter of 5 to 1,000 nm.
Dependencies are inferred from the claim text.