Addition-fragmentation oligomers having high refractive index groups
US-2016346170-A1 · Dec 1, 2016 · US
Fluoroaluminosilicate glass powder
US9937107B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9937107-B2 |
| Application number | US-201515318873-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 24, 2015 |
| Priority date | Jun 30, 2014 |
| Publication date | Apr 10, 2018 |
| Grant date | Apr 10, 2018 |
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Abstract
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Provided is a fluoroaluminosilicate glass powder that can provide a dental glass ionomer cement hardened body excellent in acid resistance, the glass powder including sodium and potassium which have an effect of lowering the reflective index of glass. A mass ratio of potassium to sodium in the component is in the range of from 1.2 to 1.9 in terms of oxide.
First claim
Opening claim text (preview).
The invention claimed is: 1. A fluoroaluminosilicate glass powder wherein a mass ratio of potassium to sodium in component is in the range of from 1.2 to 1.9 in terms of oxide, and the content of fluorine in the component is 13 mass % to 40 mass %. 2. The fluoroaluminosilicate glass powder according to claim 1 , further comprising a rare earth element or bismuth, wherein a mass ratio of the rare earth element or bismuth to the sodium in the fluoroaluminosilicate glass powder is in the range of from 0.1 to 1.5 in terms of oxide. 3. The fluoroaluminosilicate glass powder according to claim 1 having a refractive index n d of in the range of from 1.42 to 1.47. 4. A dental glass ionomer cement composition comprising the fluoroaluminosilicate glass powder according to claim 1 . 5. The fluoroaluminosilicate glass powder according to claim 2 having a refractive index n d of in the range of from 1.42 to 1.47. 6. A dental glass ionomer cement composition comprising the fluoroaluminosilicate glass powder according claim 2 . 7. A dental glass ionomer cement composition comprising the fluoroaluminosilicate glass powder according claim 3 . 8. A dental glass ionomer cement composition comprising the fluoroaluminosilicate glass powder according claim 5 . 9. A fluoroaluminosilicate glass powder wherein a mass ratio of potassium to sodium in component is in the range of from 1.2 to 1.9 in terms of oxide, and the content of silicon in the component is 15 mass % to 30 mass % in terms of oxide. 10. The fluoroaluminosilicate glass powder according to claim 9 , further comprising a rare earth element or bismuth, wherein a mass ratio of the rare earth element or bismuth to the sodium in the fluoroaluminosilicate glass power is in the range of from 0.1 to 1.5 in terms of oxide. 11. The fluoroaluminosilicate glass powder according to claim 9 having a refractive index n d of in the range of from 1.42 to 1.47. 12. A dental glass ionomer cement composition comprising the fluoroaluminosilicate glass powder according claim 9 .
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- What does patent US9937107B2 cover?
- Provided is a fluoroaluminosilicate glass powder that can provide a dental glass ionomer cement hardened body excellent in acid resistance, the glass powder including sodium and potassium which have an effect of lowering the reflective index of glass. A mass ratio of potassium to sodium in the component is in the range of from 1.2 to 1.9 in terms of oxide.
- Who is the assignee on this patent?
- G C Dental Ind Corp
- What technology area does this patent fall under?
- Primary CPC classification A61K6/889. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Apr 10 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).