USRE19506E - Cellular gypsum product - Google Patents
Cellular gypsum product Download PDFInfo
- Publication number
- USRE19506E USRE19506E US19506DE USRE19506E US RE19506 E USRE19506 E US RE19506E US 19506D E US19506D E US 19506DE US RE19506 E USRE19506 E US RE19506E
- Authority
- US
- United States
- Prior art keywords
- cellular
- gypsum
- hydrogen peroxide
- gas
- gypsum product
- 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
- 229910052602 gypsum Inorganic materials 0.000 title description 25
- 239000010440 gypsum Substances 0.000 title description 25
- 230000001413 cellular Effects 0.000 title description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 20
- 239000000203 mixture Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 11
- 210000004369 Blood Anatomy 0.000 description 9
- 239000008280 blood Substances 0.000 description 9
- 235000013312 flour Nutrition 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 210000004027 cells Anatomy 0.000 description 7
- 239000004615 ingredient Substances 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H Aluminium sulfate Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- -1 aluminum sulphate Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 210000003850 cellular structures Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012213 gelatinous substance Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 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
- 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
Definitions
- This invention relates to improvements in cellular gypsum products, and more particularly to a composition of matter for building purposes of which calcined gypsum is the base, andhaving a 5 cellular texture calculated to promote lightness in weight and to improve the heat and sound insulating properties of the material when formed into boards or blocks, cast as an insulating filler or applied to wall surfaces as a covering having acoustic properties.
- the object of the invention is to provide an improved composition for a cellular gypsum having the requisite qualities of lightness, hardness and uniformityof cellular texture by the utilization and addition to the basic calcined gypsum of relatively inexpensive ingredients, having the property of creating a uniform and stable cell structure within a comparatively short period of time.
- the more common gas producing ingredients used have been an acid salt, such as aluminum sulphate, and a carbonate of the alkali group,-so dium, magnesium or the like-the resulting gas being carbon dioxide (CO2)
- CO2 carbon dioxide
- the generation of CO2 by this reaction has long been known and used in other arts, as for instance, in the baking of bread, and hence the introduction of this gas into a mass of calcined gypsum presents no particular problem.
- the control of the gas after it has been liberated has beenthe source of considerable difficulty, and it is to the solution of this problem that considerable effort has been directed.
- the real problem is to control the mix, and hence to .produce a mixture which can be accurately controlled as to the uniformity of cell structure, and the stability of the mass when in its plastic or wet condition.
- the basic ingredient'of the com position is commercial calcined gypsum, that'is, raw gypsum rock partially calcined at 'a-temperature of about 350 (CaSO-;.1/2Hz0
- H202 hydrogen peroxide
- a catalyzer such as blood flour
- an accelerator such as anhydrate
- a waste product in the manufacture of g'ypsurnproducts or the waste gypsum products themselves as for instance, finely ground plaster board, block or other previously manufactured product which available as waste.
- the hydrogen peroxide is the principal ing're client added to generate the gas upon which the cellular structure is dependent, its chemical properties being best known by the readiness with gypsum and blood flour in the proportions of substantially two hundred (200) parts to one (1) part, and mixing the same with water containing substantially one (1) part of a three per cent (3%) solution of hydrogen peroxide.
- a method of producing a cellular gypsum mix consisting of adding to a predetermined quantity of calcined gypsum, a relatively small quantity of blood flour, adding to a predetermined quantity of water a relatively small amount of hydrogen peroxide solution, and mixing the solid and liquid materials together into a plastic mass.
- a method of producing a cellular gypsum product consisting of adding a relatively small quantity of blood flour to a predetermined quantity of calcined gypsum and mixing therewith a quantity of a solution of hydrogen peroxide and water sufiicient to form a plastic mass.
- a method of producing a cellular product consisting of mixing a solution of hydrogen peroxide and water with a mixture of calcined gypsum and blood flour.
- a method of producing a cellular gypsum product consisting of mixing a solution of hydrogen peroxide and water with a mixture of calcined gypsum, blood flour and an accelerator.
- a method of producing a cellular gypsum mix consisting of forming a dry mix of calcined gypsum and blood flour and mixing the same with water containing less than one per cent (1%) 01' hydrogen peroxide.
- a method of producing a cellular gypsum mix consisting of forming a dry mix of calcined gypsum, blood flour and an accelerator and mixing the same with water containing less than one per cent (1%) of hydrogen peroxide.
- a method of producing a cellular gypsum mix consisting of forming a dry mix of calcined gypsum and relatively small amounts of blood flour and an accelerator and mixing the same with water containing a relatively small quantity of hydrogen peroxide.
Description
Reissued Mar. 19, 1935 CELLULAR GYPSUM PRODUCT Gustave Adolph New, Lakewood, Ohio, assignor,
by mesne assignments, to Buffalo-Electro- Chemical Co., Inc., Buffalo, N. Y.
No Drawing. Original No. 1,770,797, dated Jill v 15,1930, Serial No. 242,960, December 27, 1927. Application for-reissue August 21, 1933, Serial v 8 Claims. (01. 1os 24) This invention relates to improvements in cellular gypsum products, and more particularly to a composition of matter for building purposes of which calcined gypsum is the base, andhaving a 5 cellular texture calculated to promote lightness in weight and to improve the heat and sound insulating properties of the material when formed into boards or blocks, cast as an insulating filler or applied to wall surfaces as a covering having acoustic properties.
The object of the invention is to provide an improved composition for a cellular gypsum having the requisite qualities of lightness, hardness and uniformityof cellular texture by the utilization and addition to the basic calcined gypsum of relatively inexpensive ingredients, having the property of creating a uniform and stable cell structure within a comparatively short period of time.
The meritof a composition having the foregoing characteristics will be better appreciated from a brief discussion of what has been accomplished heretofore in the attempt to produce a satisfactory cellular mix. In general, the basis of cell production has been the generation or liberation of gases within the mass by the addition of certain chemical ingredients reacting in the presence of water, giving off a free gas calculated to spread throughout the mass and form a cellular texture whenthe same has set and hardened. The more common gas producing ingredients used have been an acid salt, such as aluminum sulphate, and a carbonate of the alkali group,-so dium, magnesium or the like-the resulting gas being carbon dioxide (CO2) As a chemical phenomenon, the generation of CO2 by this reaction has long been known and used in other arts, as for instance, in the baking of bread, and hence the introduction of this gas into a mass of calcined gypsum presents no particular problem. However, the control of the gas after it has been liberated has beenthe source of considerable difficulty, and it is to the solution of this problem that considerable effort has been directed. It follows naturally'that a gas liberated into a more or less plastic mass will seek to rise and escape, and therefore means must be employed for holding or entangling the gas bubbles within the mass. This result has been accomplished to some degree by adding so-called entangling agents, such as glue, gelatinous substances and one of the several commercial retarders, so-called. But these expedients have only proved to be partially effective, since once having entrapped the gas, it is essential that it shall be distributed in bubbles or cells of uniform size and uniformly throughout the mass, since otherwise the cells would tend-to be larger at, the top than atthe bottom with the result that the structure would be'relatively weak and spongy'at the top'and quite dense at thebot- 'Another difficulty encountered has been the prolongation ,of the period required "to complete the gas' generation, with the resultthat the cells continue to form'and the bulk of the'material to increase for a considerable time after it has been poured andcommenced to set." Hence it is diflicult, if not impossible, to gauge the volume of the wet mixture that'will. occupy any given space, or the ultimate thickness of a layerof the material to be spread over: a given area. In short, the real problem is to control the mix, and hence to .produce a mixture which can be accurately controlled as to the uniformity of cell structure, and the stability of the mass when in its plastic or wet condition.
In previous applications filed by me, to wit: Serial No. 192,793, filedMay 19', 1927;No. 197,517, filed June 8, 1927; No. 213,227, filed August 15', 1927; and No. 237,985, filed December 5,1927, I have sought to overcome the technical difliculties hereinabove discussed and have disclosed as many different and practical methods of attaining this end, by the use of different ingredients and combinations of ingredients. The present disclosure is still a further improvement and development in the same direction and one in which I have sought to bring the factors of uniformity and stability of cell structure within still narrower limits of' probable error, and at the same time'to simplify the process of productionand to improve the quality of the product in other respects. The extent to which this object has been attained will be seen from'the following discussion:
As heretofore, the basic ingredient'of the com position is commercial calcined gypsum, that'is, raw gypsum rock partially calcined at 'a-temperature of about 350 (CaSO-;.1/2Hz0 To'a given volume or weight of the gypsum is added relatively small amounts of hydrogen peroxide (H202) a catalyzer such as blood flour, together with an accelerator such as anhydrate,"a waste product in the manufacture of g'ypsurnproducts or the waste gypsum products themselves, as for instance, finely ground plaster board, block or other previously manufactured product which available as waste.
The hydrogen peroxide is the principal ing're client added to generate the gas upon which the cellular structure is dependent, its chemical properties being best known by the readiness with gypsum and blood flour in the proportions of substantially two hundred (200) parts to one (1) part, and mixing the same with water containing substantially one (1) part of a three per cent (3%) solution of hydrogen peroxide.
2. A method of producing a cellular gypsum mix, consisting of adding to a predetermined quantity of calcined gypsum, a relatively small quantity of blood flour, adding to a predetermined quantity of water a relatively small amount of hydrogen peroxide solution, and mixing the solid and liquid materials together into a plastic mass.
3. A method of producing a cellular gypsum product consisting of adding a relatively small quantity of blood flour to a predetermined quantity of calcined gypsum and mixing therewith a quantity of a solution of hydrogen peroxide and water sufiicient to form a plastic mass.
4. A method of producing a cellular product consisting of mixing a solution of hydrogen peroxide and water with a mixture of calcined gypsum and blood flour.
5. A method of producing a cellular gypsum product consisting of mixing a solution of hydrogen peroxide and water with a mixture of calcined gypsum, blood flour and an accelerator.
6. A method of producing a cellular gypsum mix consisting of forming a dry mix of calcined gypsum and blood flour and mixing the same with water containing less than one per cent (1%) 01' hydrogen peroxide.
7. A method of producing a cellular gypsum mix consisting of forming a dry mix of calcined gypsum, blood flour and an accelerator and mixing the same with water containing less than one per cent (1%) of hydrogen peroxide.
8. A method of producing a cellular gypsum mix consisting of forming a dry mix of calcined gypsum and relatively small amounts of blood flour and an accelerator and mixing the same with water containing a relatively small quantity of hydrogen peroxide.
GUSTAVE ADOLPH NEW.
Publications (1)
Publication Number | Publication Date |
---|---|
USRE19506E true USRE19506E (en) | 1935-03-19 |
Family
ID=2083679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US19506D Expired USRE19506E (en) | Cellular gypsum product |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE19506E (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2878133A (en) * | 1955-02-17 | 1959-03-17 | Uccelli Augusto | Composition for insulating covering |
-
0
- US US19506D patent/USRE19506E/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2878133A (en) * | 1955-02-17 | 1959-03-17 | Uccelli Augusto | Composition for insulating covering |
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