Patent · US Active

Drag-reducing copolymer compositions

US8865632B1 · kind B1 · utility

65Cited by

24References

18Claims

0Family size

Assignee

CESI Chemical, Inc. · US

Inventors

Earl Parnell · Longview, US
Todd Sanner · Duncan, US
Marlin D. Holtmyer · Duncan, US
David Philpot · Marlow, US
Andrei Zelenev · Spring, US
Gydeon Gilzow · Conroe, US
Lakia M. Champagne · Diemelstraße, US
Thomas R. Sifferman · El Cajon, US

Key dates

Filing date	Nov 10, 2008
Grant date	Oct 21, 2014
Priority date	—
Expiry date	Sep 29, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2208/28
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A drag-reducing additive includes 40-85% by weight of a polymer emulsion that includes a polymer, a first surfactant, and a first solvent; 10-35% by weight of a second surfactant with an HLB greater than 8; and 5-30% by weight of a second solvent. In a preferred embodiment, the second solvent includes a terpene. In another preferred embodiment, the polymer is a copolymer that includes acrylamide and acrylic acid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.