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US 2021/0340436 A1Published application
Polymer dispersion by controlled radical polymerization
AssigneeRhodia Operations
InventorsZhenxing Cheng, Zhihua Zhang, Man Chen, Chee Fei Chin, David James Wilson
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Abstract
Disclosed is a polymer dispersion prepared by controlled radical polymerization and a use of the polymer dispersion as a friction reducer in oil field processes.
Claims12
A polymer dispersion comprising:
- a) 2 to 30 weight percentage of a water soluble copolymer;
- b) 10 to 50 weight percentage of a water soluble salt;
- c) 0 to 5 weight percentage of a polyol;
- and
- d) water;
- weight percentages are based on total weight of the polymer dispersion;
- wherein said copolymer is obtained by a process comprising the steps of-:
- (A) an ionic charged polymeric dispersant is prepared from at least an ionic monomer in the presence of a radical polymerization control agent to obtain a living polymer,
- (B) said living polymer is charged into an aqueous solution comprising a nonionic monomer, and optionally an ionic monomer, the mixture is then subject to continuous polymerization to obtain said copolymer.
6 more elements
A polymer dispersion comprises:
- a) 2 to 30 weight percentage of a water soluble copolymer;
- b) 10 to 50 weight percentage of a water soluble salt;
- c) 0 to 5 weight percentage of a polyol;
- and
- d) water;
- weight percentages are based on total weight of the polymer dispersion;
- wherein said copolymer comprises (i) a block of an ionic charged polymeric dispersant at one terminal;
- and (ii) a block of a nonionic monomer, optionally containing an ionic monomer.
5 more elements
Dependencies are inferred from the claim text.