Patent · US Active

Composite polyamide membrane with improved structure

US9630149B2 · kind B2 · utility

2Cited by

69References

4Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

Abhishek Roy · Edina, US
Tina L. Arrowood · Lakeville, US
Anand S. Badami · Midland, US
Robert C. Cieslinski · Midland, US
David D. Hawn · Midland, US
Steven D. Jons · Eden Prairie, US
Mou Paul · Edina, US
Steven Rosenberg · Shorewood, US
Huang-Chun Wu · Midland, US

Key dates

Filing date	Jul 3, 2013
Grant date	Apr 25, 2017
Priority date	—
Expiry date	Sep 25, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2325/20
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A thin film composite polyamide membrane having a porous support and a thin film polyamide layer comprising a reaction product of m-phenylene diamine (mPD) and trimesoyl chloride (TMC), characterized by the thin film polyamide layer having a critical strain value of less than 10%. In another embodiment, the thin film polyamide layer has a modulus of greater than 0.75 (GPa). In yet another embodiment, the thin film polyamide layer has an equilibrium swelling value of at least 45%. In another embodiment, the thin film polyamide layer has a thickness of at least 230 nm.

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