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:
Dec. 03, 2013
Filed:
May. 11, 2009
Bernadette Charleux, Lyons, FR;
Jutta Rieger, Paris, FR;
François Stoffelbach, Villejuif, FR;
Universite Pierre et Marie Curie, Paris, FR;
Centre National de la Recherche, Paris, FR;
Universite de Liege (Interface Entreprise Universite), Paris, FR;
Abstract
The invention relates to an amphiphilic block copolymer, to the preparation thereof, and to the use thereof in the form of a self-stabilizing latex. The copolymer has the formula RO—[—CHCH—O—]—C(═O)—CRR—[CHCRR]—S—C(═S)—S—Rwhere: Ris a straight or branched alkyl group, an alkenyl group having one or more —C═C— bonds, or an alkynyl group having one or more —C≡C— bonds, said groups including 8 to 18 carbon atoms; 20≦n≦100; Rand Reach are independently H, an alkyl group with 1 to 4 carbon atoms, or a nitrile group, at least one of Rand Rbeing different than H; Ris a phenyl group or an alkoxycarbonyl group in which the alkoxy group includes 1 to 8 carbon atoms; Ris a hydrogen atom or a methyl radical; and 20≦m≦1000. The preparation method comprises: preparing an aqueous solution of a compound R—S—C(═S)—S—CRR—C(═O)—ORin which Ris R—[—O—CHCH—]—, Rbeing a hydrophilic group and 20≦n≦100; adding to said solution one or more hydrophobic monomers of the formula (II) R—CR═CHand a free radical polymerization initiator; and heating said aqueous solution to a temperature of 60-90° C.