Abstract
N-Octyltrimethoxysilane (CAS No. 3069-40-7), silane coupling agent SCA-K08M, is a monomeric medium-chain alkylfunctional silane. SCA-K08M is a clear colorless liquid and soluble in common non-polar organic solvents (e. G. Petroleum ether, toluene). However its low volatility and viscosity make SCA-K08M an easy-to-handle additive. During the hydrolysis reaction between water and SCA-K08M a certain amount of ethanol (VOC) is released.
Identification
Name n-Octyltrimethoxysilane
Synonyms Trimethoxyoctylsilane
Molecular Formula C11H26O3Si
Molecular Weight 234.41
CAS Registry Number 3069-40-7
EINECS 221-338-7
Equivalents
Z-6672
OCTMO
O9840
Properties
Density 0.91
Boiling point 246 C degree
Viscosity 2 mPa. S
Flash point 102 C degree
Water solubility REACTS
Application
N-Octyltrimethoxysilane (CAS No. 3069-40-7), silane coupling agent SCA-K08M, is an important additive for many applications. Examples are:
SCA-K08M silane can be used as a surface modifier to generate hydrophobicity (e. G. On concrete, glass, inorganic pigments, SCA-K08M or mineral fillers). The medium-chain alkyl functionality results in unique compound properties when SCA-K08M treated minerals or pigments are incorporated into polymers, e. G. Polyethylene or polypropylene. Loading levels of 0.5 to 1.5% wt. SCA-K08M based on the weight of fillers or pigments are typically recommended.
SCA-K08M silane can also be used to improve the compatibility of mineral fillers or pigments in polyolefins or to ease their dispersion in nonpolar matrices.
SCA-K08M silane is a small molecule to allow for deep penetration into the cementitious surface. This material reacts with moisture in the air and in the substrate in the presence of an alkaline or acidic environment to produce hydroxy 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.
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