Manufacture of polymeric beads

Details Manufacture of polymeric beads Manufacture of polymeric beads

C - Chemistry, Metallurgy

08

F

117/46.8

C08F 2/20 (2006.01) A61K 9/16 (2006.01)

Patent

CA 1245105

ABSTRACT Manufacture of Polymeric Beads Beads comprising a polymeric matrix containing a releasable lipophilic compound are made by precipitating the compound from solution within the matrix. Beads may be made by forming a homogeneous blend of the compound in lipophilic polymerisable material and subjecting the blend to bead polymerisation while the blend is dispersed as beads in an aqueous medium containing hydrophilic polymerisation stabiliser. The lipophilic compound may be a behenyl ester wax inhibitor or other reagent useful downhole or for other purposes and preferably has a relatively high melting point. The polymerisable material preferably dissolves the lipophilic compound and may include acrylic acid, methacrylic acid or other hydrophilic polymerisable material.

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