NO168166B - PROCEDURE FOR THE PREPARATION OF WATERPROOFING Gypsum - Google Patents
PROCEDURE FOR THE PREPARATION OF WATERPROOFING Gypsum Download PDFInfo
- Publication number
- NO168166B NO168166B NO853626A NO853626A NO168166B NO 168166 B NO168166 B NO 168166B NO 853626 A NO853626 A NO 853626A NO 853626 A NO853626 A NO 853626A NO 168166 B NO168166 B NO 168166B
- Authority
- NO
- Norway
- Prior art keywords
- water
- weight
- parts
- foam
- gypsum
- Prior art date
Links
- 229910052602 gypsum Inorganic materials 0.000 title claims description 16
- 239000010440 gypsum Substances 0.000 title claims description 16
- 238000000034 method Methods 0.000 title claims description 15
- 238000004078 waterproofing Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000006260 foam Substances 0.000 claims description 11
- 239000011505 plaster Substances 0.000 claims description 9
- 239000005871 repellent Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- -1 alkyl hydrogen Chemical compound 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 238000007654 immersion Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 3
- 150000003961 organosilicon compounds Chemical class 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 229920002323 Silicone foam Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000013514 silicone foam Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Landscapes
- Building Environments (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
Foreliggende oppfinnelse vedrører en fremgangsmåte til fremstilling av vannavstøtende gjenstander av gipspulver, spesielt til fremstilling av porøse gipskartongplater, hvor gipsmassen er tilsatt et polyalkylhydrogensiloksan. The present invention relates to a method for the production of water-repellent articles from gypsum powder, in particular for the production of porous gypsum cardboard sheets, where a polyalkyl hydrogen siloxane is added to the gypsum mass.
Det er kjent å gjøre gipsgjenstander, for ekaempel gipskartongplater som oppviser en høy evne til vannopptak, vannavstøtende under anvendelse av organosilisiumforbindelser. Gjenstanden kan gjøres hydrofob etter ferdig-stilling, men skjer i de fleste tilfellene ved tilsetning av egnede organosilisiumforbindelser til gipsbestanddelene. Denne fremgangsmåten betegnes også massehydrofobering. It is known to make plaster articles, for example plasterboard sheets which exhibit a high ability to absorb water, water repellent using organosilicon compounds. The object can be made hydrophobic after completion, but this is done in most cases by adding suitable organosilicon compounds to the plaster components. This method is also referred to as mass hydrophobing.
Innenfor rammen av denne massehydrofoberingen anvendes idag fortrinnsvis vandige emulsjoner på basis av polyalkylhydrogensiloksaner (DE-PS 1 223 287). Det er også kjent å anvende polyalkylhydrogensiloksaner på ren form (DE-OS 2 74 0 049). I det sistnevnte tilfellet er det imidlertid i praksis umulig å fordele oljen på grunn av dens vannuoppløslighet i vandig gipsmasse, bestående av vann og gipspulver. Som en følge av dette oppnår man på tross av tilsetningen av organo-silisiumf orbindelser ikke vannavstøtende egenskaper. I praksis utgjør anvendelsen av polyalkylhydrogensilkosaner et vesentlig mer økonomisk alternativ; men hittil har det ikke foreligget noen fremgangsmåte for å fordele oljen regelmessig i gipsmassen. Within the scope of this mass hydrophobing, aqueous emulsions based on polyalkyl hydrogen siloxanes (DE-PS 1 223 287) are preferably used today. It is also known to use polyalkylhydrogen siloxanes in pure form (DE-OS 2 74 0 049). In the latter case, however, it is practically impossible to distribute the oil due to its water insolubility in aqueous gypsum mass, consisting of water and gypsum powder. As a result, despite the addition of organo-silicon compounds, no water-repellent properties are achieved. In practice, the use of polyalkylhydrogensilcosanes constitutes a significantly more economical alternative; but until now there has been no method for distributing the oil regularly in the gypsum mass.
Det foreligger følgelig et behov for en egnet fremgangsmåte til å gjøre porøse gipskartongplater vannavstøtende innenfor rammen av en massehydrofobering under anvendelse av polyalkylhydrogensiloksan, som lar seg gjennomføre på enkel måte uten endring av produksjonsforløpet og som sammenlignet med tidligere kjente fremgangsmåter muliggjør en mer økonomisk fremstilling. Oppgaven for foreliggende oppfinnelse var følgelig å tilveiebringe en slik fremgangsmåte. There is consequently a need for a suitable method to make porous gypsum cardboard sheets water-repellent within the framework of a mass hydrophobization using polyalkylhydrogensiloxane, which can be carried out in a simple way without changing the production process and which, compared to previously known methods, enables a more economical production. The task of the present invention was therefore to provide such a method.
Gjenstand for foreliggende oppfinnelse er i henhold til dette en fremgangsmåte for fremstilling av vannavstøtende, porøse gipsgjenstander ved behandling med alkylhydrogenpolysiloksaner, og denne fremgangsmåte karakteriseres ved at man danner et skum av vann, tensid og polyalkylhydrogensiloksan idet man anvender 0,1 - 0,5 vektdeler tensid og 0,1 - 0,5 vektdeler polyalkylhydrogensiloksan pr. 100 vektdeler gipspulver, hvoretter skummet tilsettes til den vandige gipsmassen bestående av vann, gipspulver samt eventuelt andre vanlige tilsettingsstoffer. The object of the present invention is, according to this, a method for producing water-repellent, porous plaster objects by treatment with alkylhydrogenpolysiloxanes, and this method is characterized by forming a foam of water, surfactant and polyalkylhydrogensiloxane, using 0.1 - 0.5 parts by weight surfactant and 0.1 - 0.5 parts by weight of polyalkylhydrogensiloxane per 100 parts by weight of gypsum powder, after which the foam is added to the aqueous gypsum mass consisting of water, gypsum powder and possibly other common additives.
Som skumtensider anvendes i og for seg kjente forbindelser, spesielt fra stoffklassene alkylarylsulfat, henholdsvis alkylarylsulfonat, som på grunn av sine sterke skumme-egenskaper bidrar til poredannelse. As foaming surfactants, known compounds are used in and of themselves, especially from the substance classes alkylarylsulfate, respectively alkylarylsulphonate, which due to their strong foaming properties contribute to pore formation.
Det har overraskende vist seg at den lave tensidkonsentra-sjonen i skumdanneren er tilstrekkelig til å emulgere poly-alkylhydrogensiloksanet i vann og til å gi denne emulsjonen en tilstrekkelig stabilitet, som er påkrevet for å fordele den emulgerte silikonoljen regelmessig i gipsmassen. Skum-volumene og porestørrelsen i skummet påvirkes ikke i negativ retning ved tilsetning avpolyalkylhydrogensiloksanet i skumdanneren. Dette er desto mer overraskende siden det er kjent at silikonoljer virker som anti-skummemidler og ødelegger skummet. It has surprisingly turned out that the low surfactant concentration in the foaming agent is sufficient to emulsify the polyalkylhydrogensiloxane in water and to give this emulsion a sufficient stability, which is required to distribute the emulsified silicone oil regularly in the gypsum mass. The foam volumes and pore size in the foam are not adversely affected by the addition of the polyalkylhydrogensiloxane in the foam former. This is all the more surprising since silicone oils are known to act as anti-foam agents and destroy the foam.
Som skumdannere egner seg i og for seg kjente innretninger Devices known per se are suitable as foam generators
som generatorer, hurtigrørere og andre, som gjør det mulig å oppnå skum på enkel måte. such as generators, rapid stirrers and others, which make it possible to obtain foam in an easy way.
Gipsgjenstandene som er fremstilt ved fremgangsmåten ifølge oppfinnelsen, spesielt porøse gipskartongplater, viser ut-merkede vannavstøtende egenskaper. The plaster articles produced by the method according to the invention, especially porous plasterboard sheets, show excellent water-repellent properties.
Egnede midler for fremgangsmåten ifølge oppfinnelsen er polyalkylhydrogensiloksaner, fortrinnsvis polymetylhydrogensiloksan med en viskositet på 10-50 cP/25°C. Suitable agents for the method according to the invention are polyalkylhydrogensiloxanes, preferably polymethylhydrogensiloxane with a viscosity of 10-50 cP/25°C.
Den vannavstøtende virkningen for porøse gipskartongplater fremstilt ved fremgangsmåten ifølge oppfinnelsen inntrer umiddelbart etter at gipsen er herdet. Ufordelaktig inn-virkning på bøyefastheten, trykkfastheten og vekten av platene er ikke observert. The water-repellent effect for porous plasterboard produced by the method according to the invention occurs immediately after the plaster has hardened. Unfavorable effects on the bending strength, compressive strength and weight of the plates have not been observed.
Gjenstanden for foreliggende oppfinnelse skal i det følgende beskrives nærmere ved -hjelp av eksempler. Angivelsen "deler" The object of the present invention shall be described in more detail in the following with the help of examples. The indication "parts"
i de følgende eksemplene gjelder vektdeler. in the following examples, parts by weight apply.
Eksempel 1 Example 1
150 deler vann, 1 del etersulfat ("Zeliquid LP2") og 1,5 150 parts water, 1 part ether sulfate ("Zeliquid LP2") and 1.5
deler av en polymetylhydrogensiloksan av viskositet 15 cP/25°C blandes i en skumdanner med hverandre ved 1200 omdr./min. parts of a polymethylhydrogensiloxane of viscosity 15 cP/25°C are mixed together in a foam generator at 1200 rpm.
Det slik fremstilte tensid-silikon-skum tilsettes til The surfactant-silicone foam produced in this way is added to
700 deler av en vandig gipsmasse bestående av 200 deler vann, og 500 deler gipspulver, som inneholder 94,5% kalsiumsulfat, 700 parts of an aqueous gypsum mass consisting of 200 parts water, and 500 parts gypsum powder, which contains 94.5% calcium sulphate,
5% forurensninger og 0,5% avbindingsretardasjonsmiddel og fortykningsmiddel. Blandtiden utgjør 5 sekunder ved 400 omdr./ min. Den fremstilte blandingen helles i en metallform. Etter et tidsrom på 48 timer undersøkes vannopptaket ved et ned-dykkingsforsøk. Den fremstilte porøse gipsplaten legges 2 timer i et vannbad. Etter denne neddykkingen viser gipsplaten et vannopptak på 6 vekt-%. 5% contaminants and 0.5% debonding retarder and thickener. The mixing time is 5 seconds at 400 rpm. The prepared mixture is poured into a metal mold. After a period of 48 hours, the water absorption is examined by a diving test. The prepared porous plasterboard is placed in a water bath for 2 hours. After this immersion, the plasterboard shows a water absorption of 6% by weight.
Eksempel 2 (Sammenligning) Example 2 (Comparison)
Dersom man i eksempel 1 erstatter polymetylhydrogensiloksan med vann og følger fremgangsmåten som er beskrevet i eksempel 1, får man et produkt som etter vann-neddykkingen viser en vektøkning på 39 vekt-%. If in example 1 one replaces polymethylhydrogensiloxane with water and follows the procedure described in example 1, a product is obtained which, after immersion in water, shows a weight increase of 39% by weight.
Eksempel 3 (Sammenligning) Example 3 (Comparison)
Dersom man tilsetter mengden av det i eksempel 1 beskrevne polymetylhydrogensiloksanet direkte i den vandige gipsmassen og går frem som beskrevet i eksempel 1, får man et produkt som etter vann-neddykking viser en vektøkning på 39 vekt-%. If you add the quantity of the polymethylhydrogensiloxane described in example 1 directly to the aqueous gypsum mass and proceed as described in example 1, you get a product which, after immersion in water, shows a weight increase of 39% by weight.
Eksempel 4 (Sammenligning) Example 4 (Comparison)
Dersom man i eksempel 1 forhøyer tilsetningen av polymetylhydrogensiloksanet til 5 deler, tilsetter denne oljemengden direkte til den vandige gipsmassen og går frem som beskrevet i eksempel 1, får man et produkt som etter vann-neddykkingen viser en vektøkning på 37 vekt-%. If, in example 1, the addition of the polymethylhydrogen siloxane is increased to 5 parts, this amount of oil is added directly to the aqueous plaster mass and the procedure is as described in example 1, a product is obtained which, after immersion in water, shows a weight increase of 37% by weight.
Eksempel 5 Example 5
Dersom man i eksempel 1 reduserer tilsetningen av polymetylhydrogensiloksan til 1 del og går frem som beskrevet i eksempel 1, får man et produkt som etter vann-neddykkingen viser en vektøkning på 9 vekt-%. If in example 1 you reduce the addition of polymethylhydrogensiloxane to 1 part and proceed as described in example 1, you get a product which, after immersion in water, shows a weight increase of 9% by weight.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO853626A NO168166C (en) | 1985-09-16 | 1985-09-16 | PROCEDURE FOR THE PREPARATION OF WATERPROOFING Gypsum |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO853626A NO168166C (en) | 1985-09-16 | 1985-09-16 | PROCEDURE FOR THE PREPARATION OF WATERPROOFING Gypsum |
Publications (3)
Publication Number | Publication Date |
---|---|
NO853626L NO853626L (en) | 1987-03-17 |
NO168166B true NO168166B (en) | 1991-10-14 |
NO168166C NO168166C (en) | 1992-01-22 |
Family
ID=19888480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO853626A NO168166C (en) | 1985-09-16 | 1985-09-16 | PROCEDURE FOR THE PREPARATION OF WATERPROOFING Gypsum |
Country Status (1)
Country | Link |
---|---|
NO (1) | NO168166C (en) |
-
1985
- 1985-09-16 NO NO853626A patent/NO168166C/en unknown
Also Published As
Publication number | Publication date |
---|---|
NO853626L (en) | 1987-03-17 |
NO168166C (en) | 1992-01-22 |
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