摘要:
Magnesium oxysulfate cement compositions for controlling fluid and gas flow through a wellbore may be implemented to provide a barrier to fluid and gas flow between casings or in other operations such as squeeze operations. Compositions may include an admixture of magnesium oxide, magnesium sulfate trihydrate and water. When admixed with water, the compositions rapidly transition from a flowable state to a solid state with formation of little or no gel strength before the transition and have a near-linear relationship between the time required for the transition to occur and the composition temperature at which the transition occurs enabling the user to determine the time within which the transition will occur. Accelerators and inhibitors can be added to modify the time in which the compositions make the transition from flowable state to solid state. Other agents can be added to modify the specific gravity and viscosity of the compositions.
摘要:
Die vorliegende Erfindung betrifft Magnesiumzemente enthaltend eine Magnesiumverbindung ausgewählt aus Magnesiumoxid, Magnesiumcarbonat und Magnesiumhydroxid sowie ein Magnesiumsalz, ein Kammpolymer und Quarzsand. Die erfindungsgemässe Zusammensetzung zeichnet sich durch eine vorteilhafte Verarbeitbarkeit aus sowie durch einen geringen Wassergehalt.
摘要:
Die Erfindung betrifft ein Bauprodukt oder substantieller Bestandteil eines Bauproduktes, jeweils umfassend:
a) Holzwollespäne, die untereinander mit einem Bindemittel unter Ausbildung eines offenporigen Strukturkörpers verbunden sind, b) mindestens einen, im Strukturkörper verteilten, gekapselten Latentwärmespeicher.
摘要:
An all-purpose two-component adhesive material and a process for its production that can be used both for fastening together flexible and porous material, such as for example wood, plastics, fabric, as well as for joining stiff material such as metal, stone. In particular the process can also be carried out using as reagents compounds resulting from processes of neutralization of exhausted sulphuric acid. In large amount adhesive material can be used to make coating material, such as tiles, whereas in different concentration the adhesive material can be used as fire-retardant varnish. The adhesive material is formed by: a first component that is an aqueous solution, having concentration higher than 5% in weight, of a sulphate, chloride, nitrate, acetate of magnesium or zinc; and a second component that is a mixture of magnesium oxide MgO, metal hydroxides, calcium sulphate hemi-hydrated. The magnesium or zinc salt are chosen among MgSO 4 , MgCl 2 ; MgNO 3 ; Mg(CH 3 COO) 2 , ZnSO 4 , ZnCl 2 ; ZnNO 3 ; Zn(CH 3 COO) 2 . In the second component the metal hydroxides are chosen among Mg(OH) 2 ; Al(OH) 3 ; Fe(OH) 3 ; Ti(OH) 4 .
摘要:
Compositions comprising a finely divided material such as a cellulosic material and an amount of a latex containing magnesium oxychloride and/or magnesium oxysulphate effective to impart water and fire resistance to the material are disclosed. Methods to make a water and fire resistant product are also disclosed.
摘要:
The application concerns a water and fire resistant building material consisting of a layered, shaped and hardened composition of one or more absorbant components, magnesia cement, chemically active fumed silica, alkali silicate, one or several inorganic fillers, one or several lignin sulphonates, eventually ethyl silicate, whereby the final product is built up of a two binder system, one consisting of fumed silica, alkali silicate and possibly magnesium oxide and the other consisting of magnesia cement and a lignin sulphonate salt. The application also concerns the method of producing the product. The procedure is characterized by forming a dual layered binder system and by having a very short press time.