CA2116443A1 - Process for producing water-repellent, porous plaster moulded bodies - Google Patents
Process for producing water-repellent, porous plaster moulded bodiesInfo
- Publication number
- CA2116443A1 CA2116443A1 CA 2116443 CA2116443A CA2116443A1 CA 2116443 A1 CA2116443 A1 CA 2116443A1 CA 2116443 CA2116443 CA 2116443 CA 2116443 A CA2116443 A CA 2116443A CA 2116443 A1 CA2116443 A1 CA 2116443A1
- Authority
- CA
- Canada
- Prior art keywords
- alkylhydropolysiloxanes
- plaster
- water
- added
- repellent
- 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.)
- Abandoned
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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
-
- 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
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
ABSTRACT
A Process for Producing Water-Repellent, Porous Plaster Molded Bodies The process for producing water-repellent porous plaster molded bodies, more specifically, porous plaster panels, from the components plaster powder, mixing water, foam and optionally, further common additives by adding alkylhydropolysiloxanes is effected in that the alkyl-hydropolysiloxanes are added to the mixing water or par-tial streams thereof containing common additives, followed by intense mixing of the mixture in a tube several meters long using turbulent flow.
A Process for Producing Water-Repellent, Porous Plaster Molded Bodies The process for producing water-repellent porous plaster molded bodies, more specifically, porous plaster panels, from the components plaster powder, mixing water, foam and optionally, further common additives by adding alkylhydropolysiloxanes is effected in that the alkyl-hydropolysiloxanes are added to the mixing water or par-tial streams thereof containing common additives, followed by intense mixing of the mixture in a tube several meters long using turbulent flow.
Description
3 Oh~ Z ~
-.:
KH
A Process for Producina Water-Repellent, Porous Plaster Molded Bodies The present invention is directed to a process for producing water-repellent porous plaster molded bodies, more specifically, porous plaster panels, from the com-ponents plaster powder, mixing water, foam and optionally, further common additives by adding alkylhydropoly-siloxanes.
From the DE-AS-12,23,287, there is known a process for producing water-repellent molded bodies and coatings from inorganic masses setting on addition of water, where-in, in order to achieve water-repellency, organosilicon compounds in the form of aqueous emulsions are added to the inorganic masses prior to molding. In practice, these pre-produced emulsions have proven worthwhile; however, they are significantly more expensive than the organo~
silicon compounds in non-emulsified form marketed in the form of oily suspensions.
From DE-OS 27,40,049, it is known to admix linear monomethylpolysiloxanes to the plaster powder in the ab-sence of water and only thereafter to paste this plaster with water. In practice, this process has not proven bene-ficial since, on the one hand, a relatively high amount of monomethylpolysiloxane is required and, on the other hand, a plaster powder pre-treated in such fashion is consider ably poorer in further processing.
.
From EP-PS-0,171,018, there is known a process wherein water-repellent porous plaster molded bodies are 2~16~3 produced using alkylhydropolysiloxanes by forming a foam from water, surfactant and polyalkylhydrosiloxane, and adding this foam to the aqueous plaster paste consisting of mixing water, plaster powder and optionally further common additives. This process has proven useful in prac-tice as long as highly specific parameters are maintained which, however, are not indicated in the patent specifica-tion. A substantial drawback of this process is that in practice, in the production of plaster panels on appropri-ate large-scale plants metering the mixed plaster paste is controlled by varying the added amount of foam, among other. Therefore, the varying amounts of foam likewise result in variably strong hydrophobizing of the final product.
It is the object of the present invention to de~
velop a process for producing water-repellent porous plas-ter molded bodies, more specifically, porous plaster panels, wherein perfect products are formed from the com-ponents plaster powder, mixing water, foam and optionally, further common additives and alkylhydropolysiloxanes, without the necessity of employing the alkylhydropoly-siloxanes in the form of pre-produced emulsions or in the form of a foam immediately generated prior to production.
Thus, the attempt is made to combine the advantages of continuous metering of the alkylhydropolysiloxanes when adding emulsions with the substantial lower costs when adding alkylhydropolysiloxanes to the foam wherein, how-ever, the drawback must be accepted that dosage of varying amounts of foam likewise results in varying hydrophobiz-ing Now, this object could be attained .in a surpris~
ingly simple fashion by adding the alkylhydropolysiloxanes to the mixing water or partial streams thereof containing common additives, followed by intense mixing of the mix-ture in a tube several meters long using turbulent flow.
2 1 1 6 4~ 4 3 Regarding the state of the art, this result was in no way predictable. Still, in the EP~PS-0,171,018, column 1, lines 27-39, it is expressly stated that in practice, it is impossible to disperse the oil, due to its insolu-bility in water, in the aqueous plaster paste consisting of mixing water and plaster powder. Although addition of non-emulsified oils represents the substantially more economic form, there was no process for uniformly dispers~
ing the oil in the plaster paste.
Large-scale technical experiments in Applicant's existing production plants have demonstrated that accord-ing to the invention, it is nonetheless possible to work with oil and to abandon metering in foam generation. It is of decisive significance that the alkylhydropolysiloxanes as an oil are thoroughly mixed with the mixing water in a tube several meters long using turbulent flow, before they come in contact with the plaster powder. For such inten-sive mixing, 2 m of tube are just sufficient. Tube lengths of from 4 to 6 m have proven excellently useful. While it is possible to use even longer tubes, the effect herein is not further improved unless the required amount of water calls for relatively large tube diameters. Namely, in order to generate turbulent flow within the tube, the tube diameter should be 2% of the tube length at maximum. Pre-ferably, tube diameters having from 0.1 to 1~ of the tube length are selected. With turbulent flow, a constant time-averaged velocity profile is formed in flow direction only after 50 to 100 tube diameters. Then, the Reynolds number is no longer significant. Vnder such conditions of turbu-lent flow, water and silicon oil may be processed into an emulsion which can be processed immediately.
The examinations have led to the result that it is not only possible to add the alkylhydropolysiloxanes to the main stream of mixing water but that it is likewise possible to add the alkylhydropolysiloxanes to the various 21~6~
partial streams containing common additives. Proven par-ticularly useful as the additive to the partial stream has one containing pasted paper pulp. However, since not all the porous plaster panels contain paper pulp, the alkyl-hydropolysiloxanes may also~be added to that partial stream which does not contain foaming surface-active sub-stances. Finally, the alkylhydropolysiloxanes may also be added to that partial stream which contains gelatinated starch.
As another surprising advantage, it was determined that according to the invention, the foaming agent con-sumption may be lowered by about 20% compared to a process wherein the silicon oil is added to the foam generator.
Examination of the finished plaster panels has led to the result that the quality of the plaster panels ac-cording to the invention is in any respect comparable to products wherein the silicon oil has been supplied to the foaming plant.
.
.
. : : . :: :~ - -.: :.. ,: , : : - ~ ,: . :: . ,
-.:
KH
A Process for Producina Water-Repellent, Porous Plaster Molded Bodies The present invention is directed to a process for producing water-repellent porous plaster molded bodies, more specifically, porous plaster panels, from the com-ponents plaster powder, mixing water, foam and optionally, further common additives by adding alkylhydropoly-siloxanes.
From the DE-AS-12,23,287, there is known a process for producing water-repellent molded bodies and coatings from inorganic masses setting on addition of water, where-in, in order to achieve water-repellency, organosilicon compounds in the form of aqueous emulsions are added to the inorganic masses prior to molding. In practice, these pre-produced emulsions have proven worthwhile; however, they are significantly more expensive than the organo~
silicon compounds in non-emulsified form marketed in the form of oily suspensions.
From DE-OS 27,40,049, it is known to admix linear monomethylpolysiloxanes to the plaster powder in the ab-sence of water and only thereafter to paste this plaster with water. In practice, this process has not proven bene-ficial since, on the one hand, a relatively high amount of monomethylpolysiloxane is required and, on the other hand, a plaster powder pre-treated in such fashion is consider ably poorer in further processing.
.
From EP-PS-0,171,018, there is known a process wherein water-repellent porous plaster molded bodies are 2~16~3 produced using alkylhydropolysiloxanes by forming a foam from water, surfactant and polyalkylhydrosiloxane, and adding this foam to the aqueous plaster paste consisting of mixing water, plaster powder and optionally further common additives. This process has proven useful in prac-tice as long as highly specific parameters are maintained which, however, are not indicated in the patent specifica-tion. A substantial drawback of this process is that in practice, in the production of plaster panels on appropri-ate large-scale plants metering the mixed plaster paste is controlled by varying the added amount of foam, among other. Therefore, the varying amounts of foam likewise result in variably strong hydrophobizing of the final product.
It is the object of the present invention to de~
velop a process for producing water-repellent porous plas-ter molded bodies, more specifically, porous plaster panels, wherein perfect products are formed from the com-ponents plaster powder, mixing water, foam and optionally, further common additives and alkylhydropolysiloxanes, without the necessity of employing the alkylhydropoly-siloxanes in the form of pre-produced emulsions or in the form of a foam immediately generated prior to production.
Thus, the attempt is made to combine the advantages of continuous metering of the alkylhydropolysiloxanes when adding emulsions with the substantial lower costs when adding alkylhydropolysiloxanes to the foam wherein, how-ever, the drawback must be accepted that dosage of varying amounts of foam likewise results in varying hydrophobiz-ing Now, this object could be attained .in a surpris~
ingly simple fashion by adding the alkylhydropolysiloxanes to the mixing water or partial streams thereof containing common additives, followed by intense mixing of the mix-ture in a tube several meters long using turbulent flow.
2 1 1 6 4~ 4 3 Regarding the state of the art, this result was in no way predictable. Still, in the EP~PS-0,171,018, column 1, lines 27-39, it is expressly stated that in practice, it is impossible to disperse the oil, due to its insolu-bility in water, in the aqueous plaster paste consisting of mixing water and plaster powder. Although addition of non-emulsified oils represents the substantially more economic form, there was no process for uniformly dispers~
ing the oil in the plaster paste.
Large-scale technical experiments in Applicant's existing production plants have demonstrated that accord-ing to the invention, it is nonetheless possible to work with oil and to abandon metering in foam generation. It is of decisive significance that the alkylhydropolysiloxanes as an oil are thoroughly mixed with the mixing water in a tube several meters long using turbulent flow, before they come in contact with the plaster powder. For such inten-sive mixing, 2 m of tube are just sufficient. Tube lengths of from 4 to 6 m have proven excellently useful. While it is possible to use even longer tubes, the effect herein is not further improved unless the required amount of water calls for relatively large tube diameters. Namely, in order to generate turbulent flow within the tube, the tube diameter should be 2% of the tube length at maximum. Pre-ferably, tube diameters having from 0.1 to 1~ of the tube length are selected. With turbulent flow, a constant time-averaged velocity profile is formed in flow direction only after 50 to 100 tube diameters. Then, the Reynolds number is no longer significant. Vnder such conditions of turbu-lent flow, water and silicon oil may be processed into an emulsion which can be processed immediately.
The examinations have led to the result that it is not only possible to add the alkylhydropolysiloxanes to the main stream of mixing water but that it is likewise possible to add the alkylhydropolysiloxanes to the various 21~6~
partial streams containing common additives. Proven par-ticularly useful as the additive to the partial stream has one containing pasted paper pulp. However, since not all the porous plaster panels contain paper pulp, the alkyl-hydropolysiloxanes may also~be added to that partial stream which does not contain foaming surface-active sub-stances. Finally, the alkylhydropolysiloxanes may also be added to that partial stream which contains gelatinated starch.
As another surprising advantage, it was determined that according to the invention, the foaming agent con-sumption may be lowered by about 20% compared to a process wherein the silicon oil is added to the foam generator.
Examination of the finished plaster panels has led to the result that the quality of the plaster panels ac-cording to the invention is in any respect comparable to products wherein the silicon oil has been supplied to the foaming plant.
.
.
. : : . :: :~ - -.: :.. ,: , : : - ~ ,: . :: . ,
Claims (4)
1. A process for producing water-repellent porous plaster molded bodies, more specifically, porous plas-ter panels, from the components plaster powder, mixing water, foam and optionally, further common additives, by addition of alkylhydropolysiloxanes, characterized in that the alkylhydropolysiloxanes are added to the mixing water or partial streams thereof containing common additives, followed by intense mixing of the mixture in a tube several meters long using turbulent flow.
2. The process accordiny to claim 1, character-ized in that the alkylhydropolysiloxanes are added to the partial stream of a pasted paper pulp.
3. The process according to claim 1, character-ized in that the alkylhydropolysiloxanes are added to the partial stream containing non-foaming surface-active substances.
4. The process according to claim 1, character-ized in that the alkylhydropolysiloxanes are added to the partial stream containing gelatinated starch.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4128424.0 | 1991-08-27 | ||
| DE4128424A DE4128424A1 (en) | 1991-08-27 | 1991-08-27 | METHOD FOR THE PRODUCTION OF WATER REPELLENT POROUS PLASTER MOLDED BODIES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2116443A1 true CA2116443A1 (en) | 1993-03-04 |
Family
ID=6439243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2116443 Abandoned CA2116443A1 (en) | 1991-08-27 | 1992-08-25 | Process for producing water-repellent, porous plaster moulded bodies |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0601007B2 (en) |
| JP (1) | JP3314931B2 (en) |
| AT (1) | ATE128444T1 (en) |
| CA (1) | CA2116443A1 (en) |
| DE (2) | DE4128424A1 (en) |
| DK (1) | DK0601007T3 (en) |
| ES (1) | ES2077430T5 (en) |
| FI (1) | FI114461B (en) |
| NO (1) | NO311756B1 (en) |
| WO (1) | WO1993004009A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7892472B2 (en) | 2004-08-12 | 2011-02-22 | United States Gypsum Company | Method of making water-resistant gypsum-based article |
| US8070895B2 (en) | 2007-02-12 | 2011-12-06 | United States Gypsum Company | Water resistant cementitious article and method for preparing same |
| US8329308B2 (en) | 2009-03-31 | 2012-12-11 | United States Gypsum Company | Cementitious article and method for preparing the same |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19837170A1 (en) * | 1998-08-17 | 2000-02-24 | Dennert Kg Veit | Hydrophobic mineral insulation board and process for its production |
| CA2327430A1 (en) * | 1999-12-30 | 2001-06-30 | United States Gypsum Company | Application of polymethylhydrogen siloxane for producing a water resistant gypsum product and gypsum/wood fiber board and gypsum board |
| DE10003495C2 (en) | 2000-01-27 | 2003-04-03 | Wacker Polymer Systems Gmbh | Hydrophobing agent for the hydrophobization of gypsum-bound building materials, process for its production and its use |
| DE10060992C2 (en) * | 2000-11-11 | 2003-02-20 | Arwed Biedermann Fassadenrenov | Stucco component for building facades |
| FR2826360B1 (en) * | 2001-06-21 | 2003-10-17 | Strasservil Erovente S A | NOVEL HEMP CONCRETE AND MORTARS, THEIR PREPARATION PROCESS AND THEIR APPLICATIONS |
| FR2897863B1 (en) * | 2006-02-28 | 2008-07-11 | Bpb Plc | METHOD OF HYDROFUGATING A GYPSUM-BASED PRODUCT FROM A PLASTER-BASED COMPOSITION |
| DE102007062773A1 (en) | 2007-12-27 | 2009-07-02 | Baerlocher Gmbh | Hydrophobic binder mixture and building materials made therefrom |
| UA124057C2 (en) * | 2015-12-22 | 2021-07-14 | Кнауф Гіпс Кг | Method for porosification of construction materials using siloxanes and porosified building materials |
| JP6674558B2 (en) | 2016-04-20 | 2020-04-01 | ダウ シリコーンズ コーポレーション | Lithium alkylsiliconate composition, coating film, and method for producing the same |
| KR102072498B1 (en) * | 2018-08-23 | 2020-02-03 | 백혜나 | Gypsum Paste for Crafts, Method for Production Thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1389508A (en) * | 1973-09-17 | 1975-04-03 | Apv Co Ltd | Turbulence promoting devices |
| DE3429311C1 (en) * | 1984-08-09 | 1985-12-05 | Bayer Ag, 5090 Leverkusen | Process for the production of water-repellent porous molded body from plaster |
| JPS6242728A (en) * | 1985-08-14 | 1987-02-24 | Ono Bankin Kogyosho:Kk | Fluid mixer |
| DE3704439A1 (en) * | 1987-02-12 | 1988-08-25 | Wacker Chemie Gmbh | METHOD FOR PRODUCING WATER-REPELLENT OBJECTS FROM PLASTER AND HYDROPHOBIC AGENTS CONTAINING PLASTER POWDER |
| US5135805A (en) * | 1990-07-27 | 1992-08-04 | Georgia-Pacific Corporation | Method of manufacturing a water-resistant gypsum composition |
-
1991
- 1991-08-27 DE DE4128424A patent/DE4128424A1/en not_active Withdrawn
-
1992
- 1992-08-25 ES ES92918205T patent/ES2077430T5/en not_active Expired - Lifetime
- 1992-08-25 WO PCT/EP1992/001944 patent/WO1993004009A1/en active IP Right Grant
- 1992-08-25 JP JP50413293A patent/JP3314931B2/en not_active Expired - Lifetime
- 1992-08-25 DK DK92918205T patent/DK0601007T3/en active
- 1992-08-25 EP EP19920918205 patent/EP0601007B2/en not_active Expired - Lifetime
- 1992-08-25 DE DE59203860T patent/DE59203860D1/en not_active Expired - Fee Related
- 1992-08-25 CA CA 2116443 patent/CA2116443A1/en not_active Abandoned
- 1992-08-25 AT AT92918205T patent/ATE128444T1/en not_active IP Right Cessation
-
1994
- 1994-02-23 NO NO19940615A patent/NO311756B1/en not_active IP Right Cessation
- 1994-02-24 FI FI940868A patent/FI114461B/en active IP Right Grant
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7892472B2 (en) | 2004-08-12 | 2011-02-22 | United States Gypsum Company | Method of making water-resistant gypsum-based article |
| US8070895B2 (en) | 2007-02-12 | 2011-12-06 | United States Gypsum Company | Water resistant cementitious article and method for preparing same |
| US8568544B2 (en) | 2007-02-12 | 2013-10-29 | United States Gypsum Company | Water resistant cementitious article and method for preparing same |
| US8329308B2 (en) | 2009-03-31 | 2012-12-11 | United States Gypsum Company | Cementitious article and method for preparing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06510269A (en) | 1994-11-17 |
| ATE128444T1 (en) | 1995-10-15 |
| NO940615L (en) | 1994-02-23 |
| WO1993004009A1 (en) | 1993-03-04 |
| DE59203860D1 (en) | 1995-11-02 |
| JP3314931B2 (en) | 2002-08-19 |
| EP0601007B1 (en) | 1995-09-27 |
| FI114461B (en) | 2004-10-29 |
| NO311756B1 (en) | 2002-01-21 |
| NO940615D0 (en) | 1994-02-23 |
| FI940868A (en) | 1994-02-24 |
| DE4128424A1 (en) | 1993-03-04 |
| FI940868A0 (en) | 1994-02-24 |
| EP0601007B2 (en) | 2003-03-12 |
| ES2077430T5 (en) | 2003-11-16 |
| EP0601007A1 (en) | 1994-06-15 |
| DK0601007T3 (en) | 1996-02-05 |
| ES2077430T3 (en) | 1995-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |