Fluororubber composition
US-9045614-B2 · Jun 2, 2015 · US
Diaphragm
US10000619B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10000619-B2 |
| Application number | US-201214234346-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 16, 2012 |
| Priority date | Aug 25, 2011 |
| Publication date | Jun 19, 2018 |
| Grant date | Jun 19, 2018 |
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Abstract
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A diaphragm including a cross-linked fluororubber layer obtained by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B), the cross-linked fluororubber layer having a loss modulus E″ of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test under conditions of measurement temperature: 160° C., tensile strain: 1%, static tension under a constant static load condition for measuring strain distribution: 157 cN, and frequency: 10 Hz.
First claim
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The invention claimed is: 1. A diaphragm comprising: a cross-linked fluororubber layer obtained by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B), the cross-linked fluororubber layer having a loss modulus E″ of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test under conditions of measurement temperature: 160° C., tensile strain: 1%, static tension under a constant static load condition for measuring strain distribution: 157 cN, and frequency: 10 Hz, wherein the carbon black (B) is a carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 79 m 2 /g or larger, wherein the fluororubber (A) is a vinylidene fluoride fluororubber, and wherein the vinylidene fluoride fluororubber is a vinylidene fluoride (VdF)/hexafluoropropylene (HFP) copolymer. 2. The diaphragm according to claim 1 , wherein the cross-linked fluororubber layer has a storage modulus E′ of 1,500 kPa or higher and 20,000 kPa or lower determined by a dynamic viscoelasticity test under conditions of measurement temperature: 160° C., tensile strain: 1%, static tension under a constant static load condition for measuring strain distribution: 157 cN, and frequency: 10 Hz. 3. The diaphragm according to claim 1 , wherein the fluororubber composition contains 5 to 50 parts by mass of the carbon black (B) to 100 parts by mass of the fluororubber (A). 4. The diaphragm according to claim 1 , wherein the carbon black (B) is a carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 79 to 180 m 2 /g and a dibutyl phthalate (DBP) oil absorption of 40 to 180 mL/100 g. 5. The diaphragm according to claim 1 , wherein the fluororubber composition further contains a cross-linking agent (C) and/or a cross-linking aid (D). 6. The diaphragm according to claim 1 , wherein the cross-linked fluororubber layer has an elongation at break at 160° C. of 100 to 700%. 7. The diaphragm according to claim 1 , wherein the cross-linked fluororubber layer has a tensile strength at break at 160° C. of 1.0 to 20 MPa. 8. The diaphragm according to claim 1 , wherein the cross-linked fluororubber layer has an elongation at break at 200° C. of 90 to 700%. 9. The diaphragm according to claim 1 , wherein the cross-linked fluororubber layer has a tensile strength at break at 200° C. of 1.0 to 20 MPa. 10. The diaphragm according to claim 1 , wherein the cross-linked fluororubber layer has an elongation at break at 230° C. of 80 to 700%. 11. The diaphragm according to claim 1 , wherein the cross-linked fluororubber layer has a tensile strength at break at 230° C. of 1.0 to 20 MPa.
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- What does patent US10000619B2 cover?
- A diaphragm including a cross-linked fluororubber layer obtained by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B), the cross-linked fluororubber layer having a loss modulus E″ of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test under conditions of measurement temperature: 160° C., tensile strain: 1%, static ten…
- Who is the assignee on this patent?
- Terada Junpei, Ota Daisuke, Kitaichi Masanori, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C08K3/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 19 2018 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).