Borchi Gel Thixo 2 Bayer-Börchers Rheology Modifier/ Thickener Alkyd Resins Chlorinated Rubber Epoxy Resins Polyester Polyurethane Coatings >> Solventborne Borchi® Gel Thixo 2 2 Thickener for solvent-based lacquers and paints Description Borchi® Gel Thixo 2 is a thixotropic agent and thickener for paints containing solvents of a mainly non-polar or weakly polar nature. Borchi® Gel Thixo 2 is suitable for use in binder systems based on drying oils, alkyd resins, epoxy resin esters, unsaturated polyesters, polyurethanes, chlorinated rubber, etc. Borchi® Gel Thixo 2 is supplied as a fine white powder and is used in gloss, silk finish and matt paints. Properties Borchi® Gel Thixo 2 is a thickener which enhances the thixotropic character of paints. Borchi® Gel Thixo 2 reduces settling and floating of pigments and promotes pigment dispersion during manufacture. Borchi® Gel Thixo 2 improves the properties of the finished paint (e.g. spreadability, rheological behaviour), permits the application of thicker layers, reduces curtaining and increases the depth of color of the paint. Applications Borchi® Gel Thixo 2 is effective in gloss to matt paints containing solvents of a non-polar or weakly polar nature. Polar solvents are unsuitable although a small amount of polar solvent in a non-polar or weakly polar solvent combination does not adversely affect the efficiency of Borchi® Gel Thixo 2. The nature of the binder to be used with Borchi® Gel Thixo 2 is of secondary importance. Suitable film-forming agents include alkyd resins, drying oils, chlorinated rubber, epoxy resin esters, unsaturated polyesters and polyurethanes. The choice of pigment has hardly any effect on use of Borchi® Gel Thixo 2. Mixing and addition rate Borchi® Gel Thixo 2 can be added in the supply form as a powder or (with prior preparation) as a paste. Its addition in the form of a paste is preferable for the sake of optimum efficiency. When being incorporated in powder form, Borchi® Gel Thixo 2 is added during preparation of the pigment paste which is then milled in the usual milling unit. The temperatures reached during this process should be between 35 and 55 °C. With insufficient milling, however, this type of mixing may lead to agglomeration and subsequently to grain formation in the paint. lt is therefore a good idea to formulate Borchi® Gel Thixo 2 into a paste using a suitable solvent before incorporating it into the pigment paste. This should preferably be performed at a high temperature of 70 to 80 °C by gentle stirring, resulting in a homogeneous, clear paste. This paste is then added to the pigment paste prior to milling. The optimum addition rate of Borchi® Gel Thixo 2 is dependent on the paint system and the desired effect and must therefore be determined beforehand in trials. Excessive addition rates should be avoided as too high quantities of Borchi® Gel Thixo 2 may adversely affect the properties of the paint (gloss, suitability for sanding). We recommend an addition rate of between 0.1 and 2.0% Borchi® Gel Thixo 2 relative to the total paint formulation, depending on the paint system. Thixotropic agent and thickener for paints containing solvents of a mainly non-polar or weakly polar nature. Suitable for use in binder systems based on drying oils, alkyd resins, epoxy resin esters, unsaturated polyesters, polyurethanes, chlorinated rubber,etc. Can be used in gloss, silk finish and matt paints. Enhances the thixotropic character of paints. Reduces settling and floating of pigments and promotes pigment dispersion during manufacture. Improves the properties of the finished paint (e.g. spreadability, rheological behaviour), permits the application of thicker layers, reduces curtaining and increases the depth of color of the paint. The choice of pigment has hardly any effect. Can be added in the supply form as a powder or (with prior preparation) as a paste. Its addition in the form of a paste is preferable for the sake of optimum efficiency. When being incorporated in powder form, added during preparation of the pigment paste which is then milled in the usual milling unit. The temperatures reached during this process should be between 35 and 55 °C. With insufficient milling, however, this type of mixing may lead to agglomeration and subsequently to grain formation in the paint. Formulated into a paste using a suitable solvent before incorporating it into the pigment paste. This should preferably be performed at a high temperature of 70 to 80 °C by gentle stirring, resulting in a homogeneous, clear paste. This paste is then added to the pigment paste prior to milling. Excessive addition rates should be avoided as too high quantities may adversely affect the properties of the paint (gloss, suitability for sanding). Recommended usage level: 0.1 and 2.0% relative to the total paint formulation, depending on the paint system.