GB447478A - The production of moulds, particularly for use in dentistry - Google Patents
The production of moulds, particularly for use in dentistryInfo
- Publication number
- GB447478A GB447478A GB3258634A GB3258634A GB447478A GB 447478 A GB447478 A GB 447478A GB 3258634 A GB3258634 A GB 3258634A GB 3258634 A GB3258634 A GB 3258634A GB 447478 A GB447478 A GB 447478A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parts
- phosphoric acid
- moulds
- substances
- phosphate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Preparations (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Moulds for casting are produced by embedding a model in a composition produced from two solid components, one containing one or more ceramic substances which harden on burning and one containing one or more substances which react with phosphoric acid ions with the formation of a phosphate which hardens at ordinary temperature, and a solution containing a phosphoric acid or a phosphoric acid ester e.g. ethyl phosphate. Alternatively a solid phosphoric acid or phosphorus pentoxide may be incorporated with the solid components and water used to produce the composition. Ceramic substances specified are clay, kaolin, loam and mixtures of aluminium oxide, silicic acid or silicates. Hardening phosphate forming substances specified are oxides, hydroxides, phosphates, carbonates and other readily decomposable salts of the alkaline earth metals, iron, copper, zinc and cadmium. In examples, a mixture containing 60 parts of quartz powder, 5 parts kaolin, 10 parts chamotte, 15 parts aluminium oxide, 5 parts magnesium oxide 5 parts zinc oxide is mixed with 50 parts of 25 per cent phosphoric acid and with a solution of 9 parts of phosphorus pentoxide in 41 parts of water respectively. The moulds produced according to the invention are particularly suitable for the casing of metals of high melting point such as stainless steels and of ceramic masses such as porcelain for instance in dentistry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3258634A GB447478A (en) | 1934-11-12 | 1934-11-12 | The production of moulds, particularly for use in dentistry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3258634A GB447478A (en) | 1934-11-12 | 1934-11-12 | The production of moulds, particularly for use in dentistry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB447478A true GB447478A (en) | 1936-05-12 |
Family
ID=10340942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3258634A Expired GB447478A (en) | 1934-11-12 | 1934-11-12 | The production of moulds, particularly for use in dentistry |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB447478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2013218A (en) * | 1978-01-27 | 1979-08-08 | G C Dental Ind Corp | Dental compositions |
-
1934
- 1934-11-12 GB GB3258634A patent/GB447478A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2013218A (en) * | 1978-01-27 | 1979-08-08 | G C Dental Ind Corp | Dental compositions |
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