GB497945A - Improvements in or relating to the manufacture of embedding masses containing calcium sulphate plaster - Google Patents
Improvements in or relating to the manufacture of embedding masses containing calcium sulphate plasterInfo
- Publication number
- GB497945A GB497945A GB18164/37A GB1816437A GB497945A GB 497945 A GB497945 A GB 497945A GB 18164/37 A GB18164/37 A GB 18164/37A GB 1816437 A GB1816437 A GB 1816437A GB 497945 A GB497945 A GB 497945A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plaster
- calcium sulphate
- parts
- addition
- relating
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/849—Preparations for artificial teeth, for filling teeth or for capping teeth comprising inorganic cements
- A61K6/858—Calcium sulfates, e.g, gypsum
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00836—Uses not provided for elsewhere in C04B2111/00 for medical or dental applications
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Ceramic Engineering (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Epidemiology (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dental Preparations (AREA)
- Materials For Medical Uses (AREA)
Abstract
Embedding masses, especially for dental purposes, comprising mainly calcium sulphate plaster and siliceous materials, are modified by the addition of ammonium salts of inorganic acids, e.g. diammonium phosphate, and ammonium chloride, nitrate, sulphate, or pyrophosphate. The addition has the effect of increasing the expansion on setting and the thermal expansion. In an example, an embedding mass comprising 800 parts of quartz powder, 312 parts of a semi-hydrate gypsum having the physical properties set forth in claim 1 of Specification 412,988 and 120 parts of plaster of Paris is modified by the addition of 1 per cent of diammonium phosphate or ammonium chloride or nitrate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18164/37A GB497945A (en) | 1937-06-30 | 1937-06-30 | Improvements in or relating to the manufacture of embedding masses containing calcium sulphate plaster |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18164/37A GB497945A (en) | 1937-06-30 | 1937-06-30 | Improvements in or relating to the manufacture of embedding masses containing calcium sulphate plaster |
Publications (1)
Publication Number | Publication Date |
---|---|
GB497945A true GB497945A (en) | 1938-12-30 |
Family
ID=10107746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18164/37A Expired GB497945A (en) | 1937-06-30 | 1937-06-30 | Improvements in or relating to the manufacture of embedding masses containing calcium sulphate plaster |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB497945A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002076325A1 (en) * | 2001-03-26 | 2002-10-03 | Wieland Dental + Technik Gmbh & Co. Kg | Expanding dental model material |
-
1937
- 1937-06-30 GB GB18164/37A patent/GB497945A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002076325A1 (en) * | 2001-03-26 | 2002-10-03 | Wieland Dental + Technik Gmbh & Co. Kg | Expanding dental model material |
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