IE810456L - Gypsum plaster. - Google Patents
Gypsum plaster.Info
- Publication number
- IE810456L IE810456L IE45681A IE45681A IE810456L IE 810456 L IE810456 L IE 810456L IE 45681 A IE45681 A IE 45681A IE 45681 A IE45681 A IE 45681A IE 810456 L IE810456 L IE 810456L
- Authority
- IE
- Ireland
- Prior art keywords
- water demand
- gypsum plaster
- reducing agent
- formaldehyde condensates
- sulphonated
- Prior art date
Links
- 239000011507 gypsum plaster Substances 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 239000003638 chemical reducing agent Substances 0.000 abstract 2
- SQAINHDHICKHLX-UHFFFAOYSA-N 1-naphthaldehyde Chemical class C1=CC=C2C(C=O)=CC=CC2=C1 SQAINHDHICKHLX-UHFFFAOYSA-N 0.000 abstract 1
- 229920001732 Lignosulfonate Polymers 0.000 abstract 1
- 239000004117 Lignosulphonate Substances 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 239000002270 dispersing agent Substances 0.000 abstract 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical class O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 abstract 1
- 229910052602 gypsum Inorganic materials 0.000 abstract 1
- 239000010440 gypsum Substances 0.000 abstract 1
- 235000019357 lignosulphonate Nutrition 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
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
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
The water demand of gypsum plaster is reduced by adding a water demand reducing agent to powdered gypsum rock before or during calcination. The preferred water demand reducing agent are natural or synthetic polymeric dispersing agents, such as sulphonated naphthalene- formaldehyde condensates or sulphonated melamine-formaldehyde condensates. Ligno sulphonates can also be used for this purpose.
[GB2086869A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000364273A CA1157893A (en) | 1980-11-07 | 1980-11-07 | Gypsum calcination method and composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE810456L true IE810456L (en) | 1982-05-07 |
| IE51013B1 IE51013B1 (en) | 1986-09-03 |
Family
ID=4118386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE45681A IE51013B1 (en) | 1980-11-07 | 1981-03-03 | Gypsum calcination method and composition |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1157893A (en) |
| FR (1) | FR2493827B1 (en) |
| GB (1) | GB2086869B (en) |
| IE (1) | IE51013B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0708382D0 (en) | 2007-05-01 | 2007-06-06 | Bpb Plc | Gypsum based compositions |
| FR3166631A1 (en) * | 2024-09-20 | 2026-03-27 | Saint-Gobain Placo | Process for preparing alpha hemihydrate of calcium sulfate. |
-
1980
- 1980-11-07 CA CA000364273A patent/CA1157893A/en not_active Expired
-
1981
- 1981-02-27 GB GB8106378A patent/GB2086869B/en not_active Expired
- 1981-02-27 FR FR8104018A patent/FR2493827B1/en not_active Expired
- 1981-03-03 IE IE45681A patent/IE51013B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IE51013B1 (en) | 1986-09-03 |
| CA1157893A (en) | 1983-11-29 |
| GB2086869A (en) | 1982-05-19 |
| GB2086869B (en) | 1984-04-26 |
| FR2493827B1 (en) | 1985-12-06 |
| FR2493827A1 (en) | 1982-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed |