Patent ID: 8389643
Filing Date: 2013-03-05
Classification: C08F,C08L

Abstract:
1. Preparation process for the preparation of a copolymer comprising a backbone based on methacrylate units which comprises the step of polymerizing one or more methacrylate monomers which are precursors of the said methacrylate units in the presence: of at least one polymerization initiator, chosen from organic or inorganic peroxides, azo compounds, redox pairs and/or alkoxyamines; of at least one reversible addition fragmentation transfer (RAFT) transfer agent capable of generating a primary radical of formula where R is CH where Z is selected from the group consisting of hydrogen, chlorine, an optionally substituted alkyl group, an optionally substituted aryl group, an optionally substituted heterocycle group, an optionally substituted alkylthio group —SR2, an optionally substituted alkoxycarbonyl group, an optionally substituted aryloxycarbonyl group (—COOR2), a carboxyl group (—COOH), an optionally substituted acyloxy group (—OOCR2), an optionally substituted carbamoyl group (—CONR2), a cyano group (—CN), a dialkyl- or diarylphosphonato group [—P(═O)OR2 where R2 and R3, which are identical or different, are selected from the group consisting of an optionally substituted C of one or more acrylic monomers; and optionally of one or more comonomers chosen from styrene monomers, acrylonitrile, acrylamide or substituted acrylamides, 4-acryloylmorpholine, N-methylolacrylamide, acrylamidopropyltrimethylammonium chloride (APTAC), acrylamidomethylpropanesulphonic acid (AMPS) or its salts, methacrylamide or substituted methacrylamides, N-methylolmethacrylamide, methacrylamidopropyltrimethylammonium chloride (MAPTAC), itaconic acid, maleic acid or its salts, maleic anhydride, alkyl or alkoxy or aryloxy polyalkylene glycol maleates or hemimaleates, vinylpyridine, vinylpyrrolidinone, (alkoxy)poly(alkylene glycol) vinyl ether or divinyl ether, methoxy poly(ethylene glycol) vinyl ether or poly(ethylene glycol) divinyl ether, olefinic monomers, ethylene, propylene, butene, hexane, 1-octene, fluorinated olefinic monomers, vinylidene monomers, vinylidene fluoride, vinylidene chloride, and mixtures thereof; whereby the one or more methacrylate monomers, the one or more acrylic monomers, and the optional one or more comonomers randomly copolymerize.