Patent · US Active

Polycarbonate block copolymers

US11155747B2 · kind B2 · utility

2Cited by

52References

43Claims

0Family size

Assignee

Saudi Aramco Technologies Company · SA

Inventors

Scott D. Allen · Ithaca, US
Chris A. Simoneau · Ithaca, US
John M. Salladay · Carmel, US
David M. Hatfield · Midland, US
John W. Stevens · Gillingham, GB

Key dates

Filing date	Jul 1, 2019
Grant date	Oct 26, 2021
Priority date	—
Expiry date	Jul 1, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/54
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The disclosure pertains to amphiphilic block copolymers comprising an aliphatic polycarbonate chain coupled to a hydrophilic polymer. Such amphiphilic polymers may have the formula A-L-B, where A- is a polycarbonate or polyethercarbonate chain having from about 3 to about 500 repeating units, L is a linker moiety and -B is a hydrophilic oligomer having from about 4 to about 200 repeating units. Provided copolymers are useful as surfactants capable of emulsifying aqueous solutions and supercritical carbon dioxide. Provided copolymers also have utility as additives for use in enhanced oil recovery methods.

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