Semiconductor device and method for manufacturing semiconductor device
US-2017162463-A1 · Jun 8, 2017 · US
Method for producing polytetrafluoroethylene powder
US11518826B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11518826-B2 |
| Application number | US-201816957288-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 25, 2018 |
| Priority date | Dec 25, 2017 |
| Publication date | Dec 6, 2022 |
| Grant date | Dec 6, 2022 |
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- Title
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Abstract
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A method for producing a polytetrafluoroethylene powder, which includes applying an ultrasonic wave to a polytetrafluoroethylene aqueous dispersion containing polytetrafluoroethylene particles to coagulate the polytetrafluoroethylene particles.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a polytetrafluoroethylene powder, comprising: applying an ultrasonic wave to a polytetrafluoroethylene aqueous dispersion containing a polytetrafluoroethylene particle and an anionic hydrocarbon surfactant to coagulate the polytetrafluoroethylene particle, wherein the application of the ultrasonic wave is performed with an output of 100 W or more and at a frequency of 15 kHz or more. 2. The production method according to claim 1 , wherein the polytetrafluoroethylene aqueous dispersion is obtained by polymerizing tetrafluoroethylene in an aqueous medium in the presence of the anionic hydrocarbon surfactant.
Assignees
Inventors
Classifications
by coagulating dispersions {(C08J3/122 takes precedence)} · CPC title
Homopolymers or copolymers of tetrafluoroethylene · CPC title
Treatment by wave energy or particle radiation · CPC title
anionic · CPC title
- C08F14/26Primary
Tetrafluoroethene · CPC title
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Frequently asked questions
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- What does patent US11518826B2 cover?
- A method for producing a polytetrafluoroethylene powder, which includes applying an ultrasonic wave to a polytetrafluoroethylene aqueous dispersion containing polytetrafluoroethylene particles to coagulate the polytetrafluoroethylene particles.
- Who is the assignee on this patent?
- Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F14/26. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 06 2022 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).