Fluoropolymer coating composition
US-2018155569-A1 · Jun 7, 2018 · US
Fluoropolymer coating composition
US11926754B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11926754-B2 |
| Application number | US-201917058028-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 20, 2019 |
| Priority date | May 24, 2018 |
| Publication date | Mar 12, 2024 |
| Grant date | Mar 12, 2024 |
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Abstract
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Provided is a coating film having excellent durability and wear resistance, and utility as mold surface release coating. The coating film has excellent releasability (non-adhesiveness) over a long period of time. Further provided is a coating composition capable of forming such a coating film, the coating composition containing a fluoropolymer and an oil that is a liquid at 25° C., wherein the decomposition temperature of the oil is higher than the melting point of the fluoropolymer.
First claim
Opening claim text (preview).
What is claimed is: 1. A fluoropolymer coating composition comprising: a fluoropolymer; and an oil that is a liquid at 25° C., wherein the decomposition temperature of said oil is higher than the melting point of said fluoropolymer, and wherein said oil is essentially free from fluorine and is dispersed in said fluoropolymer coating composition with an average particle diameter of 50 μm or less. 2. The fluoropolymer coating composition according to claim 1 , wherein said oil is contained in an amount from 1 to 35 wt. % of a total amount of polymer solids content and said oil in said coating composition. 3. The fluoropolymer coating composition according to claim 1 , wherein said decomposition temperature of said oil is at least 10° C. higher than said melting point of said fluoropolymer. 4. The fluoropolymer coating composition according to claim 1 , wherein said oil is silicone oil. 5. The fluoropolymer coating composition according to claim 1 , further comprising a surfactant. 6. The fluoropolymer coating composition according to claim 1 , wherein said fluoropolymer comprises melt-processable perfluoropolymer. 7. The fluoropolymer coating composition according to claim 1 , wherein said fluoropolymer comprises tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer (PFA) wherein the alkyl group of the perfluoro(alkyl vinyl ether) has 1 to 5 carbon atoms. 8. The fluoropolymer coating composition according to claim 1 , wherein said fluoropolymer coating composition is a water-based coating or a powder coating. 9. The fluoropolymer coating composition according to claim 1 , wherein said coating composition is a top coating. 10. A coating film forming method comprising applying said fluoropolymer coating composition according to claim 1 , and then heat treating the coated composition to a temperature of at least said melting point of said fluoropolymer. 11. A mold, wherein said coating film according to claim 10 is formed on a molding surface of said mold.
Assignees
Inventors
Classifications
- C09D127/18Primary
Homopolymers or copolymers of tetrafluoroethene · CPC title
containing fluorine · CPC title
Polysiloxanes · CPC title
Additives · CPC title
Spheres · CPC title
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- What does patent US11926754B2 cover?
- Provided is a coating film having excellent durability and wear resistance, and utility as mold surface release coating. The coating film has excellent releasability (non-adhesiveness) over a long period of time. Further provided is a coating composition capable of forming such a coating film, the coating composition containing a fluoropolymer and an oil that is a liquid at 25° C., wherein the …
- Who is the assignee on this patent?
- Chemours Co Fc Llc, Chemours Mitsui Fluoroproducts Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C09D127/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 12 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).