Abstract:
A settable thixotropic material comprises a thixotrope and a settable substance, the material being capable of gelling reversibly in a gelling time of less than 60 seconds. The thixotrope conveniently comprises a fine grained clay, especially smectite clays, e.g. hectorites. It is preferred to use synthetic smectite type clay colloids, and good results have been obtained with the synthetic clay known as Laponite RDS. The settable material conveniently comprises cement, particularly Portland cement. The thixotropic material finds use generally in oilwell applications, e.g. to plug lost circulation zones, to repair damaged or corroded casing, as grouts, and to limit annular gas migration. The material also finds particular application in techniques for completion of horizontal wells completed with slotted or pre-drilled liners, as described in International Application WO-95/00739.
Abstract:
A low viscosity ceramic tile grout composition is produced by mixing three components, the first component comprising a curable epoxy resin, the second comprising a hardener for the epoxy resin and the third comprising a filler. The grout is applied to ceramic floor tiles precoated with wax and after curing the excess grout is removed from the surface of the tiles with the wax.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zum Lackieren von Spanplatten, insbesondere Zementspanplatten, umfassend die Schritte a) des Auftragens von mindestens einem ersten Lack mit einer Viskosität zwischen 10 bis 100 dPas zur Ausbildung von mindestens einer ersten Lackschicht, b) der zumindest teilweise Härtung der mindestens ersten Lackschicht, und c) des Auftragens von mindestens einem zweiten Lack mit einer Viskosität zwischen 10 bis 100 dPas zur Ausbildung von mindestens einer zweiten Lackschicht auf der mindestens ersten Lackschicht. Die Erfindung betrifft ebenfalls eine Spanplatte herstellbar nach diesem Verfahren und deren Verwendung.
Abstract:
The present invention relates to a thickener system which is suitable for preparing a thickener composition and consists of (A) at least one anionic surfactant A and (B) at least one polymer B which comprises at least one hydrophobic group and at least one hydrophilic group, the concentration of the polymer B in the thickener composition being below the overlap concentration c* of the polymer, to the use of an inventive thickener system for preparing a thickener composition, to a thickener composition comprising an inventive thickener system and to the use of inventive thickener compositions.
Abstract:
The invention concerns a method for inerting clays in sand intended for preparing hydraulic compositions, comprising a step which consists in adding to the composition or one of its constituents a cationic polymer having a cationic charge density more than 0.5 meq/g and an intrinsic viscosity less than 1 dg/l.
Abstract:
A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a gypsum based dry mortar composition wherein the amount of the cellulose ether in the gypsum based dry mortar composition is significantly reduced. When this gypsum based dry mortar composition is mixed with water and applied to a substrate, the water retention, sag resistance, and workability of the wet plaster mortar are comparable or improved as compared to when using conventional similar cellulose ethers.
Abstract:
A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a dry tile cement composition wherein the amount of the cellulose ether in the tile cement composition is significantly reduced. When this tile cement composition is mixed with water and applied to a substrate, the correction time, applicability, and sag resistance of the wet mortar are comparable or improved as compared to when using conventional similar cellulose ethers.
Abstract:
The invention concerns a method for treating a material based on concrete, mortar, cement, stone, stucco or the like, comprising steps which consist in: mixing one or several active products with a gel; applying a continuous coat of the resulting mixture over the entire surface of the material to be treated.
Abstract:
The present invention relates to a method for the production of a macroporous ceramic foam, which method comprises: (a) forming a ceramic slip comprising a substantially homogeneous mixture of a ceramic particulate, an organic binder in a liquid carrier, and optionally one or more surfactants, wherein at least one surfactant is present if the organic binder does not function as a surfactant, and wherein the ceramic slip preferably has a viscosity in the range of from 15 to 200 mPas-1; (b) foaming the ceramic slip; and (c) heating the foamed ceramic slip at a temperature sufficient to substantially burn out the organic binder. The macroporous ceramic foam is suitable for use in biomedical applications such as synthetic bones, tissue engineering scaffolds or drugdelivery devices.