Ureido-functionalized aqueous polymeric dispersion
US-9212292-B2 · Dec 15, 2015 · US
Ion Exchange Membranes
US2018200708A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018200708-A1 |
| Application number | US-201615744340-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 1, 2016 |
| Priority date | Jul 14, 2015 |
| Publication date | Jul 19, 2018 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A composite ion exchange membrane comprising a cationically-charged membrane and an oppositely charged compound covalently bound thereto, the composite ion exchange membrane having: (i) a zeta-potential lower than −8 mV; and (ii) an effective charge lower than 20 μmol/m 2 .
First claim
Opening claim text (preview).
1 . A composite ion exchange membrane comprising a cationically-charged membrane and an oppositely charged compound covalently bound thereto, the composite ion exchange membrane having: (i) a zeta-potential lower than −8 mV; and (ii) an effective charge lower than 20 μmol/m 2 . 2 . (canceled) 3 . The composite membrane according to claim 1 wherein the oppositely charged compound comprises a sulpho group. 4 . The composite membrane according to claim 1 wherein the cationically-charged membrane further comprises a porous support. 5 . The composite membrane according to claim 1 having an effective charge of less than 10 mol/m 2 . 6 . The composite membrane according to claim 1 having: (i) a zeta-potential lower than −10 mV; and (ii) an effective charge lower than 10 μmol/m 2 . 7 . The composite membrane according to claim 1 wherein only one side of the cationically-charged membrane has an oppositely charged compound covalently bound thereto. 8 . The composite membrane according to claim 1 wherein both sides of the cationically-charged membrane have an oppositely charged compound covalently bound thereto. 9 . A membrane stack comprising two or more composite membranes according to claim 1 . 10 . (canceled) 11 . The composite membrane according to claim 1 wherein the cationically-charged membrane has been obtained by a process comprising the polymerisation of a composition comprising a crosslinking agent and a monofunctional ethylenically unsaturated monomer having a cationic charge. 12 . The composite membrane according to claim 1 wherein the zeta-potential is lower than −10 mV and the effective charge is lower than 5 μmol/m 2 . 13 . The composite membrane according to claim 1 wherein the zeta-potential is measured using an Anton Paar SurPASS Electrokinetic Analyzer using 1 mM KCl solution at pH 5 in milli-Q ultrapure water as electrolyte. 14 . The composite membrane according to claim 1 wherein the effective charge constitutes the amount of sodium ions washed from the composite membrane surface by 0.5M KCl after an overnight washing with 0.5M NaCl. 15 . A membrane stack comprising two or more composite membranes according to claim 3 .
Assignees
Inventors
Classifications
Homopolymers or copolymers of acrylic acid esters · CPC title
Homopolymers or copolymers of amides or imides · CPC title
using wave energy or particle radiation · CPC title
After-treatment · CPC title
and containing other heteroatoms · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2018200708A1 cover?
- A composite ion exchange membrane comprising a cationically-charged membrane and an oppositely charged compound covalently bound thereto, the composite ion exchange membrane having: (i) a zeta-potential lower than −8 mV; and (ii) an effective charge lower than 20 μmol/m 2 .
- Who is the assignee on this patent?
- Fujifilm Mfg Europe Bv
- What technology area does this patent fall under?
- Primary CPC classification C08F220/60. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jul 19 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).