Manufacture of polymeric beads

Details Manufacture of polymeric beads Manufacture of polymeric beads

1984-11-23

1987-04-07

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524458, 524460, 524819, 524827, 524832, 524833, 524836, 525902, 5263184, 52631845, 252 8552, C08F 220

Patent

active

046562052

ABSTRACT:
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 polymerizable material and subjecting the blend to bead polymerization while the blend is dispersed as beads in an aqueous medium containing hydrophilic polymerization stabilizer. 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 polymerizable material preferably dissolves the lipophilic compound and may include acrylic acid, methacrylic acid or other hydrophilic polymerizable material.

REFERENCES:
patent: 3906087 (1975-09-01), Sim et al.
patent: 4178361 (1979-12-01), Cohen et al.
patent: 4344431 (1982-08-01), Yolles
patent: 4411754 (1983-10-01), Kaetsu et al.
patent: 4588640 (1986-05-01), Matlach
Chem. Abstracts, 94:214516n.

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