Dip a thickener effects on really stone paint film performance

The influence of film performance really stone paint sand mining has the characteristics of high content, high density, easy to precipitate. Should add thickener to increase viscosity, improving thixotropy, machinability and prolong shelf life. That is commonly used in really stone paint thickener including cellulose, alkali soluble thickener and associated thickener. Cellulose thickener is convenient to use, the thickening effect is good. The more amount, the base material of adhesive, the better. However, it will extend the drying time of coating. Coating will become soft and hard to dry for a long time. In addition, the cellulose thickener perishable and metamorphism. Hydrophilic will affect the water resistance of emulsion, often will reduce the resistance to water and whiteness of the emulsion, is not conducive to 0 5 ℃ and 85% relative humidity really stone paint film formation. Hydrophobic modification of alkali soluble thickener has better than cellulose mouldproof. It can be thickening water and emulsion, improve the water resistance. Polyurethane association only thickening emulsion thickener, and the associated thickener containing at least two of the hydrophobic groups of molecules. Association thickener is not only mutual association, also with emulsifiers in emulsion association, in water to form a three-dimensional network structure, so as to achieve the thickening effect, has the very good mouldproof and water resistance. Texanol, ethylene glycol monobutyl ether and benzyl alcohol as the silicone acrylic emulsion and the color sand preparation really stone paint film forming additive, and adding different thickener test film performance. Results show that hydroxyethyl cellulose really stone paint film white, alkali soluble thickener film pale mild, alkali soluble thickener and polyurethane association thickener film performance is good, no white phenomenon. In does not affect the coating resistance to water and on the basis of the cost of raw materials, reduce the water retentivity good thickening agent, has a strong thixotropy hydrophobic modification of alkali soluble thickener and the combination of polyurethane association thickener is more advantageous to the performance of the really stone paint.