Amphiphilic block copolymer and method for preparing same

US8598289B2 · kind B2 · utility

Assignees

• Université Pierre et Marie Curie · FR
• CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · FR
• UNIVERSITE DE LIEGE INTERFACE ENTERPRISES UNIVERSITE · FR

Inventors

• Bernadette Charleux · Saint-Mandé, FR
• Jutta Rieger · Paris, FR
• Francois Stoffelbach · Val-de-Reuil, FR

Key dates

• Filing date: May 11, 2009
• Grant date: Dec 3, 2013
• Expiry date: Jun 7, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L53/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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 R5O—[—CH2CH2—O—]n—C(═O)—CR3R4—[CH2CR6R7]m—S—C(═S)—S—R1 where: R1 is 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; R3 and R4 each are independently H, an alkyl group with 1 to 4 carbon atoms, or a nitrile group, at least one of R3 and R4 being different than H; R6 is a phenyl group or an alkoxycarbonyl group in which the alkoxy group includes 1 to 8 carbon atoms; R7 is a hydrogen atom or a methyl radical; and 20≦m≦1000. The preparation method comprises: preparing an aqueous solution of a compound R1—S—C(═S)—S—CR3R4—C(═O)—OR2 in which R2 is R5—[—O—CH2CH2—]n—, R5 being a hydrophilic group and 20≦n≦100; adding to said solution one or more hydrophobic monomers of the formula (II) R6—CR7═CH2 and a free radical polymerization initiator; and heating said aqueous solution to a temperature of 60-90° C.