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:
Apr. 30, 2013
Filed:
Mar. 28, 2007
Lucilla Del Gaudio, Milan, IT;
Thomas Paul Lockhart, Lodi, IT;
Alessandra Belloni, Milan, IT;
Rossella Bortolo, Novara, IT;
Roberto Tassinari, Novara, IT;
Lucilla Del Gaudio, Milan, IT;
Thomas Paul Lockhart, Lodi, IT;
Alessandra Belloni, Milan, IT;
Rossella Bortolo, Novara, IT;
Roberto Tassinari, Novara, IT;
ENI S.p.A., Rome, IT;
Polimeri Europa S.p.A., Milan, IT;
Abstract
Process for the preparation of a water-in-oil or oil-in-water nanoemulsion wherein the dispersed phase is distributed in the dispersing phase in the form of droplets having a diameter ranging from 1 to 500 nm, comprising: 1) the preparation of a homogeneous water/oil blend (I) characterized by an interface tension lower than 1 mN/m, comprising water in an amount of 30 to 70% by weight, at least two surface-active agents having a different HLB, selected from non-ionic, anionic, polymeric surface-active agents, said surface-active agents being present in such a quantity as to make the blend homogeneous; 2) the dilution of the blend (I) in a dispersing phase consisting of oil or water with the addition of a surface-active agent, selected from non-ionic, anionic, polymeric surface-active agents, the quantity of the dispersing phase and surface-active agent being such as to obtain a nanoemulsion having a HLB different from that of the blend (I).