Release film, laminate and method for manufacturing same, and method for manufacturing fuel cell
US-2016276689-A1 · Sep 22, 2016 · US
Preparation of ion exchange membranes from polyolefins and polycyclic olefins
US12410289B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12410289-B2 |
| Application number | US-201917282512-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 7, 2019 |
| Priority date | Oct 5, 2018 |
| Publication date | Sep 9, 2025 |
| Grant date | Sep 9, 2025 |
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- Title
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Abstract
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Ion exchange membranes for use in electrochemical energy conversion and storage applications include copolymers having a backbone produced from an olefin, such as ethylene, and a cyclic olefin, such as norbornene. Haloalkyl side chains with terminal halide groups are connected to the polymer backbone via Friedel-Crafts alkylation. The halide groups are then replaced with ionic groups via substitution. The ion exchange membrane material can then be cast or impregnated into a reinforcing mesh to form cation exchange membrane or anion exchange membranes. Rigidity of the ion exchange membranes can be controlled by varying the ratio of olefin to cyclic olefin in the polymer backbone.
First claim
Opening claim text (preview).
What is claimed is: 1. An ion exchange membrane material comprising a polymer according to Formula II: wherein m+n=1, x≥2, Ak is a hydrocarbyl group, and R3 is an ionic group, a polar group, or combinations thereof. 2. The ion exchange membrane material according to claim 1 , wherein R3 includes one or more ammonium groups, one or more multication hydrocarbyl chains, one or more spiro-type ammonium groups, one or more sulfonate groups, one or more phosphonate groups, one or more carboxylate groups, one or more alcohols, one or more amines, or combinations thereof. 3. The ion exchange membrane material according to claim 1 , wherein m is between about 0.1 and about 0.5.
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Classifications
Fuel cells · CPC title
with aliphatic cyclic olefins · CPC title
grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title
Metallocene catalysts · CPC title
with non-conjugated dienes, e.g. EPT rubbers · CPC title
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- What does patent US12410289B2 cover?
- Ion exchange membranes for use in electrochemical energy conversion and storage applications include copolymers having a backbone produced from an olefin, such as ethylene, and a cyclic olefin, such as norbornene. Haloalkyl side chains with terminal halide groups are connected to the polymer backbone via Friedel-Crafts alkylation. The halide groups are then replaced with ionic groups via substi…
- Who is the assignee on this patent?
- Rensselaer Polytech Inst
- What technology area does this patent fall under?
- Primary CPC classification C08J5/2243. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 09 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).