	US 11,912,934 B2
	Stabilized friction reducer emulsions
Helène Martin, Chatillon (FR); Patrick Moreau, Saint-Denis (FR); and Arnaud Cadix, Lille (FR)
Assigned to RHODIA OPERATIONS, Aubervilliers (FR)
Appl. No. 17/436,848
Filed by RHODIA OPERATIONS, Aubervilliers (FR)
PCT Filed Mar. 11, 2020, PCT No. PCT/EP2020/056570 § 371(c)(1), (2) Date Sep. 7, 2021, PCT Pub. No. WO2020/182919, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 19162084 (EP), filed on Mar. 12, 2019.
Prior Publication US 2022/0177774 A1, Jun. 9, 2022
Int. Cl. C09K 8/68 (2006.01); C09K 8/60 (2006.01)

CPC C09K 8/68 (2013.01) [C09K 8/602 (2013.01); C09K 2208/28 (2013.01)]

8 Claims

1. A friction reducer formulation comprising friction reducer polymers within the dispersed phase of an inverse emulsion, wherein said inverse emulsion contains a composition C comprising a mixture of:

from 1% to 5% of at least an alkanolamide emulsifier selected from the group consisting of alkyl and alkenyl diethanolamides; and

from 0.01 to 0.5% of a block copolymer, wherein the copolymer is a di-block copolymer comprising:

a block A comprising repeating units derived from N-vinyl pyrrolidone; and

a block B comprising repeating units derived from 2-ethyl-hexyl acrylate, and

wherein % is in mass, based on a total mass of the inverse emulsion containing the composition C.