09-05-2019 дата публикации
Номер: US20190136023A1
Copolymers comprising ethylene, vinyl esters, in particular vinyl acetate and esters of (meth)acrylic acid, selected from esters comprising branched alkyl, cyclic alkyl or optionally alkyl substituted aryl moieties and having a weight average molecular weight of 35,000 g/mol to 150,000 g/mol, formulations of such copolymers in organic solvents and their use as pour point depressant, wax inhibitor and flow enhancer for crude oils. 125.-. (canceled)26. A copolymer (A) comprising ethylene , a vinyl ester , and a (meth)acrylate , wherein the copolymer (A) comprises(M1) 83.5 mol % to 96.5 mol % of ethylene,{'sub': 2', '1', '4, 'sup': 1', '1, '(M2) 3 mol % to 11.5 mol % of at least one vinyl ester of the formula HC═CH—O—(O)C—R(I) where Ris H or a C— to Calkyl moiety, and'}{'sub': '2', 'sup': 2', '3', '2', '3, 'claim-text': [{'sup': '3a', 'R: branched alkyl moieties having 4 to 18 carbon atoms,'}, {'sup': '3b', 'R: cyclic alkyl moieties having 5 to 12 carbon atoms, and'}, {'sup': '3c', 'R: aryl moieties having 6 to 12 carbon atoms which are optionally alkyl substituted ,'}], '(M3) 0.5 mol % to 5 mol % of a (meth)acrylate of the formula HC═C(R)—COORwherein Ris H or methyl, and Ris selected from the group consisting of'}{'sub': 'w', 'and wherein the copolymer (A) has a weight average molecular weight Mof 35,000 g/mol to 150,000 g/mol.'}27. The copolymer (A) according to claim 26 , wherein Ris a methyl moiety.28. The copolymer (A) according to claim 26 , wherein Rhas 5 to 11 carbon atoms.29. The copolymer (A) according to claim 26 , wherein Rhas 8 to 10 carbon atoms.30. The copolymer (A) according to claim 26 , wherein Rhas 6 to 10 carbon atoms.31. The copolymer (A) according to claim 26 , wherein Ris selected from the group consisting of Rand R.32. The copolymer (A) according to claim 26 , wherein Ris R.33. The copolymer (A) according to claim 26 , wherein the weight average molecular weight Mof the copolymer (A) is 50 claim 26 ,000 g/mol to 120 claim 26 ,000 g/mol.34. A ...
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