The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2014
Filed:
Sep. 09, 2010
Junji Oshima, Osaka, JP;
Junji Oshima, Osaka, JP;
Japan Envirochemicals, Ltd., Osaka-shi, Osaka, JP;
Abstract
Controlled release particles are obtained by dissolving a hydrophobic antibiotic compound in a hydrophobic polymerizable vinyl monomer without the presence of a solvent, thereby preparing a hydrophobic solution, the hydrophobic antibiotic compound having a melting point of 100° C. or less, a polar term δof 2 to 8 [(J/cm)] of a solubility parameter (δ) and a hydrogen bonding term δof 5.5 to 9.5 [(J/cm)] of the solubility parameter (δ), the solubility parameter (δ) defined by Hansen and calculated by van Klevelen and Hoftyzer method; dispersing the hydrophobic solution in water; and polymerizing the polymerizable vinyl monomer in the presence of an oil-soluble initiator by radical polymerization, thereby producing a polymer having a polar term δof 5 to 7 [(J/cm)] and a hydrogen bonding term δof 8 to 10 [(J/cm)] of the solubility parameter (δ).