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:
Nov. 15, 1994
Filed:
Mar. 14, 1994
Randal M Hill, Midland, MI (US);
Steven A Snow, Sanford, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
A method of entrapping a water-soluble substance in vesicles formed from a siloxane surfactant is carried out by dissolving the substance to be entrapped in water, adding a siloxane surfactant, mildly agitating the mixture, and removing excess of water and substance. Water-insoluble substances can be entrapped in the vesicles by dissolving the substance to be entrapped in the siloxane surfactant, and mildly agitating the substance and the siloxane surfactant. Suitable siloxane surfactants are R--[Si(Me).sub.2 O].sub.14 --Si(Me).sub.2 --R in which R is --(CH.sub.2).sub.3 (OCH.sub.2 CH.sub.2).sub.7 OH, R--[Si(Me).sub.2 O].sub.14 --Si(Me).sub.2 --R in which R is --(CH.sub.2).sub.3 (OCH.sub.2 CH.sub.2).sub.12 OH, Me.sub.3 SiO[Si(Me).sub.2 O].sub.22 --[SiMeRO].sub.2 --SiMe.sub.3 in which R is --(CH.sub.2).sub.3 (OCH.sub.2 CH.sub.2).sub.12 OH, and Me.sub.3 SiO[Si(Me).sub.2 O].sub.103 --[SiMeRO].sub.10 --SiMe.sub.3 in which R is --(CH.sub.2).sub.3 (OCH.sub.2 CH.sub.2).sub.12 OH.