Vinylidene fluoride copolymer, method for producing the same, gel electrolyte, and non-aqueous battery
US-10227429-B2 · Mar 12, 2019 · US
Process for manufacturing heat treated PVDF
US12060463B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12060463-B2 |
| Application number | US-201917293971-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 20, 2019 |
| Priority date | Nov 22, 2018 |
| Publication date | Aug 13, 2024 |
| Grant date | Aug 13, 2024 |
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- Title
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Abstract
Official abstract text for this publication.
The present invention relates to a process for producing heat-treated vinylidene fluoride polymer particles which exhibit excellent dispersibility and solubility in aprotic polar solvents, improved colour and are less prone to agglomeration and to uses of said vinylidene fluoride polymer particles in electrodes or separators in electrochemical devices and in filtration membranes. The process comprises providing an aqueous dispersion of the VDF-based polymer particles, thermally treating it under stirring and isolating the heat-treated polymer particles.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for manufacturing (semi)-crystalline vinylidene fluoride (VDF) polymer particles [polymer (F f ) particles], said process comprising: (i) providing an aqueous dispersion [dispersion (D)] consisting of an aqueous medium and of particles of at least one (semi)-crystalline VDF-based polymer [polymer (F) particles], (ii) thermally treating the dispersion (D) provided in step (i) at a temperature comprised in the range from 100 to 180° C., under stirring, and (iii) isolating polymer (F f ) particles from the thermally treated dispersion obtained in step (ii). 2. The process according to claim 1 wherein the dispersion (D) has a solid content of polymer (F) particles dispersed in aqueous medium ranging from 5 to 50% by weight. 3. The process according to claim 1 , wherein the polymer (F) comprises at least 0.01% by moles of recurring units derived from at least one functional hydrogenated monomer, wherein the molar amounts of said recurring units are relative to the total moles of recurring units in said polymer (F). 4. The process according to claim 3 , wherein the functional hydrogenated monomer is of formula (I): wherein each of R 1 , R 2 and R 3 , equal to or different from each other, is independently a hydrogen atom or a C 1 -C 3 hydrocarbon group, and R x is a hydrogen atom or a C 1 -C 5 hydrocarbon group comprising at least one hydroxyl group. 5. The process according to claim 1 wherein the polymer (F) particles are wet polymer (F) particles [(polymer (WF) particles].
Assignees
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Classifications
Polyolefins · CPC title
having a layered structure · CPC title
Manufacturing processes of separators, membranes or diaphragms · CPC title
fluorinated polymers · CPC title
as layered products · CPC title
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Frequently asked questions
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- What does patent US12060463B2 cover?
- The present invention relates to a process for producing heat-treated vinylidene fluoride polymer particles which exhibit excellent dispersibility and solubility in aprotic polar solvents, improved colour and are less prone to agglomeration and to uses of said vinylidene fluoride polymer particles in electrodes or separators in electrochemical devices and in filtration membranes. The process co…
- Who is the assignee on this patent?
- Solvay Specialty Polymers It
- What technology area does this patent fall under?
- Primary CPC classification C08J3/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 13 2024 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).