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:
Jun. 20, 2006
Filed:
Apr. 06, 2001
Charles T. Berge, Wilmington, DE (US);
John Chiefari, Armdale, AU;
Jeffery W. Johnson, Rochester Hills, MI (US);
Albert Mau, Wheelers Hill, AU;
Roshan Mayadunne, Wheelers Hill, AU;
Catherine Louise Moad, Sassafras, AU;
Graeme Moad, Sassafras, AU;
Ezio Rizzardo, Wheelers Hill, AU;
Gerry Swiegers, Wheelers Hill, AU;
San Thang, Clayton South, AU;
Gerry Wilson, Collingwood, AU;
Charles T. Berge, Wilmington, DE (US);
John Chiefari, Armdale, AU;
Jeffery W. Johnson, Rochester Hills, MI (US);
Albert Mau, Wheelers Hill, AU;
Roshan Mayadunne, Wheelers Hill, AU;
Catherine Louise Moad, Sassafras, AU;
Graeme Moad, Sassafras, AU;
Ezio Rizzardo, Wheelers Hill, AU;
Gerry Swiegers, Wheelers Hill, AU;
San Thang, Clayton South, AU;
Gerry Wilson, Collingwood, AU;
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Commonwealth Scientific and Industrial Research Organisation, Victoria, AU;
Abstract
The invention provides in one aspect a process for preparing a microgel by RAFT polymerizing in the presence of a RAFT chain transfer agent, one or more solvophobic monomers and one or more solvophilic monomers to form one or more block copolymers comprising one or more solvophobic blocks and one or more solvophilic blocks wherein the solvophobic block is insoluble in a dispersing medium and the solvophilic block is soluble in the dispersing medium. The block copolymer is dispersed in the dispersing medium to form micelles, which is then stabilized to form the microgel. The dispersing medium can be aqueous or lipophilic. The method of the present invention also permits one to encapsulate a wide variety of materials, such as pigments, dye molecules, and aluminum flakes used in metallized paints.