Surface treatment agent for wax pattern and method of manufacturing dental prosthesis
US-2017304034-A1 · Oct 26, 2017 · US
Phosphate-based dental investment material
US10945927B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10945927-B2 |
| Application number | US-201815981980-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 17, 2018 |
| Priority date | May 17, 2017 |
| Publication date | Mar 16, 2021 |
| Grant date | Mar 16, 2021 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
To provide a phosphate-based dental investment material which can used for metal and press ceramic and especially can impart the lubricity to the surface of a press ceramic, and a phosphate-based dental investment material which can be subjected to a flash heating for press ceramic, can obtain sufficient the hardening expansion, and can easily remove the investment material after press molding. A phosphate-based dental investment material of the present disclosure comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 20 wt. %; (b) ammonium dihydrogenphosphate: 8 to 25 wt. % and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica.
First claim
Opening claim text (preview).
What is claimed is: 1. A phosphate-based dental investment material comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 20 wt. %; (b) ammonium dihydrogenphosphate: 8 to 25 wt. % and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica, wherein the cation-treated colloidal silica is colloidal silica surface-treated with a cationic silane coupling material or a cationic metal element. 2. The phosphate-based dental investment material according to claim 1 , wherein the content of alkali metals (in terms of oxide) in the (c) aqueous solution including cation-treated colloidal silica is in a range of 0.001 to 0.30 wt. %. 3. The phosphate-based dental investment material according to claim 1 , wherein the pH of the (c) aqueous solution including cation-treated colloidal silica is in a range of 8.0 to 10.0. 4. A phosphate-based dental investment material comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 20 wt.%; (b) ammonium dihydrogenphosphate: 8 to 25 wt.% and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica, wherein the cation-treatment is alumina compound treatment. 5. The phosphate-based dental investment material according to claim 2 , wherein the pH of the (c) aqueous solution including cation-treated colloidal silica is in a range of 8.0 to 10.0. 6. A phosphate-based dental investment material comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 20 wt.%; (b) ammonium dihydrogenphosphate: 8 to 25 wt.% and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica, wherein the content of alkali metals (in terms of oxide) in the (c) aqueous solution including cation-treated colloidal silica is in a range of 0.001 to 0.30 wt.%, and wherein the cation-treatment is alumina compound treatment. 7. A phosphate-based dental investment material comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 50 wt.%; (b) ammonium dihydrogenphosphate: 8 to 25 wt.% and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica, wherein the pH of the (c) aqueous solution including cation-treated colloidal silica is in a range of 8.0 to 10.0, and wherein the cation-treatment is alumina compound treatment.
Assignees
Inventors
Classifications
Leucite · CPC title
- A61C13/20Primary
Methods or devices for soldering, casting, moulding or melting {(A61C13/04, A61C13/081 take precedence)} · CPC title
Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof · CPC title
Magnesium oxides or oxide-forming salts thereof · CPC title
Binders based on silicon compounds · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10945927B2 cover?
- To provide a phosphate-based dental investment material which can used for metal and press ceramic and especially can impart the lubricity to the surface of a press ceramic, and a phosphate-based dental investment material which can be subjected to a flash heating for press ceramic, can obtain sufficient the hardening expansion, and can easily remove the investment material after press molding.…
- Who is the assignee on this patent?
- Shofu Inc
- What technology area does this patent fall under?
- Primary CPC classification A61C13/20. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Mar 16 2021 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).