| US 7,470,744 B2 | ||
| Copolymers useful as demulsifiers and clarifiers | ||
| Jacqueline Behles, Sugar Land, Tex. (US) | ||
| Assigned to Baker Hughes Incorporated, Houston, Tex. (US) | ||
| Filed on Apr. 12, 2006, as Appl. No. 11/402,697. | ||
| Prior Publication US 2007/0244248 A1, Oct. 18, 2007 | ||
| Int. Cl. C08F 222/14 (2006.01) | ||
| U.S. Cl. 524—555 [524/556; 526/303.1; 526/318.43; 526/319; 526/330; 526/335; 526/336; 526/346] | 19 Claims |
| 1. A copolymer useful as a demulsifier or clarifier comprising the product of polymerizing:
at least one aromatic monomer having one or more polymerizable double bonds;
at least one oleophilic monomer having one or more polymerizable double bonds;
at least one ionizable monomer having a polymerizable double bond; and
at least one hydrophilic monomer having one or more polymerizable double bonds, under polymerization conditions sufficient
to prepare a copolymer wherein:
the at least one aromatic monomer having one or more polymerizable double bonds is selected from the group consisting of:
styrene, methylstyrene, t-butyl styrene, 4-acetoxystyrene, benzyl methacrylate, 4-chloromethyl styrene, bromostyrene, 4-methoxystyrene
polystyrene monomethacrylate, 9-anthracenylmethyl (meth)acrylate,chlororhenyl acrylate, 4-methacryloxy -2-hydroxybenzorhenone,
2-(2′-methacryloxy-5′-methylphenyl) benzotriazole, 2-naphthyl (meth)acrylate, 2-phenylethyl (meth)acrylate, phenyl (meth)acrylate,
1 -pyrenylmethyl (meth)acrylate, 9-vinylanthracene, vinyl benzoate, Divinylbenzene, cinnamyl (meth)acrylate, 2-cinnamoyloxyethyl
(meth)acrylate and mixtures thereof;
the at least one oleophilic monomer having one or more polymerizable double bonds is selected from the group consisting of:
allyl (meth)acrylate, butanediol di(meth)acrylate, bisphenol A di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, pentaerythritol
diacrylate monostearate vinyl acetate, N-cyclohexylacrylamide, poly(prorylene glycol) monomethacrylate, methyl (meth)acrylate,
ethyl (meth)acrylate, proryl (meth)acrylate, butyl (meth)acrylate, t-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate,
cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, octyl (meth)acrylate, isodecyl (meth)acrylate, decyl (meth)acrylate,
lauryl (meth)acrylate, undecyl (meth)acrylate, stearyl (meth)acrylate, hexadecyl (meth)acrylate, and mixtures thereof;
the at least one ionizable monomer having a polymerizable double bond is selected from the group consisting of: (meth)acrylic
acid, 2- (dimethylamino)ethyl (meth)acrylate, 2-(diethylamino)ethyl (meth)acrylate, 2- or 4-vinyl pyridine, 3-(dimethylamino)proryl
(meth)acrylamide, 2-carboxyethyl (meth)acrylate, 2-(diisopropylamino)ethyl (meth)acrylate, 3- (dimethylamino) neorentyl (meth)acrylate,
1 -vinylimidazole, methacrylamidopropyl trimethyl ammonium chloride, acryloyloxyethyl trimethyl ammonium chloride, and mixtures
thereof; and
the at least one hydrophilic monomer having one or more polymerizable double bonds is selected from the group consisting of:
2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, poly(ethylene glycol) (meth)acrylate, 4-(meth)acryloylmorpholine,
tetrahydrofurfuryl (meth)acrylate. N-vinylcaprolactam, 1 -vinyl-2-pyrrolidone, ethylene glycol dimethacrylate, poly(ethylene
glycol) dimethacrylate, N,N′-methylene bisacrylamide, N,N′-ethylene bisacrylamide, isopropyl (meth)acrylamide, (meth)acrylamide,
N-vinyl formamide, allyl glycidyl ether, N,N-diallyl acrylamide, diallyl maleate, diallylamine, N,N-diethyl acrylamide, diethyl
fumarate, 2-methacryloxyethyl glucoside, 2-N-morpholinoethyl (meth)acrylate, glycidyl (meth)acrylate, acrylonitrile, and mixtures
thereof.
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