Hollow particles, method for producing hollow particles, resin compositon, and molded body
US-2024416313-A1 · Dec 19, 2024 · US
Method for producing fluoropolymer
US12528899B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12528899-B2 |
| Application number | US-202217592754-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 4, 2022 |
| Priority date | Aug 7, 2019 |
| Publication date | Jan 20, 2026 |
| Grant date | Jan 20, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A method for producing a fluoropolymer which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorine-containing diacyl peroxide represented by the formula (1): XRf a C(═O)OOC(═O)Rf b Y (wherein X and Y are each independently H or F; and Rf a and Rf b are each independently a C1-C6 linear or branched perfluoroalkylene group optionally containing an ether bond) and a fluorine-containing carboxylic acid represented by the following formula (2): Z 2 Rf c COOH (wherein Z 2 is H or F; and Rf c is a C1-C3 linear or branched perfluoroalkylene group optionally containing an ether bond when Z 2 is H, and Rf c is a C1 or C2 linear or branched perfluoroalkylene group optionally containing an ether bond when Z 2 is F) to provide a fluoropolymer.
First claim
Opening claim text (preview).
What is claimed is: 1 . A method for producing a fluoropolymer, the method comprising polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorine-containing diacyl peroxide represented by the following formula (1): XRf a C(═O)OOC(═O)Rf b Y (1) wherein(X and Y are each independently H or F; and Rf a and Rf b are each independently a C1-C6 linear or branched perfluoroalkylene group optionally containing an ether bond,) and CF 3 COOH, to provide a fluoropolymer, wherein the aqueous medium has a pH of 3.1 or lower. 2 . The production method according to claim 1 , wherein the aqueous medium has a pH of 2.90 or lower.
Assignees
Inventors
Classifications
Carboxylic acids containing halogens · CPC title
Hexyfluoropropene · CPC title
Tetrafluoroethene · CPC title
- C08F2/18Primary
Suspension polymerisation · CPC title
Hexafluoropropene · CPC title
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- What does patent US12528899B2 cover?
- A method for producing a fluoropolymer which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorine-containing diacyl peroxide represented by the formula (1): XRf a C(═O)OOC(═O)Rf b Y (wherein X and Y are each independently H or F; and Rf a and Rf b are each independently a C1-C6 linear or branched perfluoroalkylene group optionally containing an ether bond) …
- Who is the assignee on this patent?
- Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F2/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 20 2026 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).