Hydrophobic Silane

Product Name: Hydrophobic Silane

Item No: SilibaseWR-6403

Introduction:

SilibaseWR-6403 Hydrophobic Silane is high purity, undiluted iso-butyltriethoxysilane. When diluted with an appropriate solvent, it can be used in the formulation of water repellent products. Upon proper application, the formulated product will penetrate and provide water repellency by chemically reacting with the cementitious substrate. Treated substrates are hydrophobic and retain their original appearance.  

SilibaseWR-6403 Hydrophobic Silane is a small molecule to allow for deep penetration into the construction materials (especially concrete and reinforced concrete) surface. This material reacts with moisture in the air and in the substrate in the presence of an alkaline or acidic environment to produce hydroxyl groups. These hydroxy groups will bond with the substrate and itself to produce a hydrophobic treatment that inhibits water absorption into the substrate. An alkaline environment, such as new concrete, will catalyze the reaction and speed the formation of the hydrophobic surface. 

SilibaseWR-6403 Hydrophobic Silane is like DowCorning’s Z-6403 silane, Evonik Degussa’s Dynasylan IBTEO. 

Chemical Name: isobutyltriethoxysilane

Typical Physical Properties:

CAS No.: 17980-47-1

EINECS No.: 402-810-3

Formula: C10H24O3Si

Molecular Weight: 220.38

Boiling Point: 190℃ (760mmHg)

Flash Point: 63℃

Color and Appearance: Colorless clear liquid

Density 25/25℃: 0.90

Refractive Index: 1.3908 (25℃)

Purity: 99.0% by GC

Applications:

SilibaseWR-6403 Hydrophobic Silane should be diluted in solvents such as alcohols, chlorinated solvents, aliphatic solvents, and low molecular weight cyclic polydimethylsiloxane. Typical dilution levels are 40% and 20% SilibaseWR-6403 Hydrophobic Silane in a solvent. 

Blends of the solvents can also be used. The evaporation rate of the diluted material can be modified depending on the type and concentration of the solvent. Select the proper solvent for your application, as some silane/solvent blends may darken the surface.  

Methods of application include airless sprayer, roller and brush. When a brush or roller is used, repeated applications should be made until the surface remains moist for a few minutes. If an airless sprayer is used, application should continue until the substrate is thoroughly saturated. Sprayers should be fitted with solvent resistant hoses and gaskets. A test application is necessary on each surface to be treated to ensure compatibility and the desired water repellent result. Surfaces should be free of standing water, surface dirt, dust, oils, and other contaminants. The formulated SilibaseWR-6403 Hydrophobic Silane may be applied to damp surfaces although dry surfaces are preferred to achieve maximum penetration into the substrate. 

SilibaseWR-6403 Hydrophobic Silane can be used as a surface modifier to generate hydrophobicity and to increase compatibility to organic nonpolar matrices. 

SilibaseWR-6403 Hydrophobic Silane can be used as a component for the manufacture of Ziegler-Natta Catalysts. 

Packing and Storage:

SilibaseWR-6403 Hydrophobic Silane is supplied in net weight 180Kg steel drum.  

In the unopened original container SilibaseWR-6403 Hydrophobic Silane has a shelf life of one year in a dry and cool place.