25-06-2015 дата публикации
Номер: US20150175752A1
The invention relates to a copolymer comprising a main hydrocarbon chain and side groups including carboxylic groups and polyoxyalkylate groups, characterized in that it further includes gem acetophosphonate groups, an adjuvant for suspensions of mineral particles comprising said copolymer and a method for preparing said copolymer. 1. A copolymer comprising a main hydrocarbon chain and side groups , wherein the side groups comprise carboxylic groups , polyoxyalkylate groups and gem acetophosphonate groups.2. The copolymer according to claim 1 , wherein the polyoxyalkylate side groups are bound to the main chain through an ester claim 1 , ether or amide bond.4. The copolymer according to claim 3 , wherein the gem acetophosphonate groups are of formula (IA) claim 3 , L forming with a carboxylic group of the copolymer an amide function or an ester group.5. The copolymer according to claim 3 , wherein the gem acetophosphonate groups are of formula (IA) claim 3 , n being equal to 0.6. The copolymer according to claim 3 , wherein the gem acetophosphonate groups are of formula (IA) claim 3 , n being equal to 1 and X being a C-Calkylene group.7. The copolymer according to claim 3 , wherein the gem acetophosphonate groups are of formula (IA) claim 3 , Rbeing a hydrogen atom or an alkaline claim 3 , earth-alkaline or ammonium cation.8. The copolymer according to claim 3 , wherein the gem acetophosphonate groups are of formula (IA) claim 3 , Rbeing a hydroxyl group or a hydrogen atom.9. The copolymer according to claim 1 , wherein the polyoxyalkylate groups are of the formula (II) below:{'br': None, 'sub': 'e', '—R—Z-A\u2003\u2003(II)'}wherein:{'sub': e', '1', '12, 'Ris a C-Calkylene group or a C═O group or further absent; and'}{'sup': 4', '4, 'sub': 1', '6, 'Z is an oxygen atom or a group N—R, wherein Ris a hydrogen or a C-Calkyl group; and'}{'sub': 'm', 'sup': '3', 'claim-text': Q represents an alkylene group with 2 to 4 carbon atoms or a mixture of these alkylene groups;', ...
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