04-01-2018 дата публикации
Номер: US20180002231A1
Novel copolymers obtained by polymerisation a mixture of monomers comprising: at least one anionic monomer (a) comprising a polymerisable unsaturated function and a carboxylic group; and at least one monomer (b) of formula (I): 1. A copolymer obtained by polymerization a monomer mixture comprising:at least one anionic monomer (a) comprising a polymerizable unsaturated function and a carboxylic group; and {'br': None, 'i': H', 'C═C', 'R', 'CH', '—O—', 'EO', 'PO', 'H, 'sub': 2', '1', '2', 'p', 'n', 'm]-, '(—)-()-[()-()\u2003\u2003(I)'}, 'at least one monomer (b) of formula (I)wherein:{'sub': 1', '3, 'Rrepresents a hydrogen atom or a CHgroup;'}p is 1 or 2;{'sub': n', 'm, '[(EO)-(PO)] represents a polyalkoxyl chain made of ethoxyl units EO and propoxyl units PO, distributed in blocks, alternately or randomly;'}m and n represent integers ranging between 1 and 250, the sum of m and n being greater than or equal to 10, with the proviso that the mole proportion of the ethoxyl units in the polyalkoxyl chain (n)/(m+n) is greater than or equal to 70% and strictly less than 90%.2. The copolymer of claim 1 , wherein the monomer (b) has formula (I′):{'br': None, 'i': H', 'C═C', 'R', 'CH', '—O', 'EO', 'PO', 'H, 'sub': 2', '1', '2', 'n', 'm, '(—)-—[()-()]-\u2003\u2003(I′).'}3. The copolymer of claim 1 , wherein monomer (b) has formula (II):{'br': None, 'i': H', 'C═C', 'CH', 'CH', '—O—', 'EO', 'PO', 'H, 'sub': 2', '3', '2', 'n', 'm, '(—)-[()-()]-\u2003\u2003(II).'}4. The copolymer of claim 1 , wherein the mole proportion of the ethoxyl units in the polyalkoxyl chain of monomer (b) is between 70% and 88%.5. The copolymer of claim 1 , wherein the total number of ethoxyl and propoxyl units (m+n) of the polyalkoxyl chain of the monomer (b) is between 10 and 150.6. The copolymer of claim 1 , where the monomer (b) represents from 1 to 50 mol % of the total mole number of monomers that constitute said copolymer.7. The copolymer of claim 1 , wherein the anionic monomer is at least one ...
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