Silanes

Silanes

Silanes are organofunctional silicone monomers playing a critical role in bonding incompatible materials, specifically bridging the gap between inorganic substrates like glass, silica and metals and organic polymers. They function as coupling agents, adhesion promoters and surface modifiers.

Grade Chemical Name Structural Formula Molecular Weight Specific Gravity @ 25°C Refractive Index x @25°C Flash Point, °C Boiling Point, °C Minimum coverage m2/g List # Applicable Resins
SC-13 Vinyl trichlorosilane CH2=CHSiCI3 161.5 1.26 1.432 9.0 91 480 2.2037 Unsaturated polyesters
SC-23 Vinyl tris (2-methoxyethoxy) silane CH2=CHSi(OC2H4OCH3)3 280.4 1.04 1.427 146 285 278 2.2067 Unsaturated polyesters
SC-33 Vinyl triethoxysilane CH2=CHSi (OC2H5)3 190.3 0.90 1.397 59 161 410 2.2066 Crosslinked polyethylene
SC-43 Vinyl trimethoxysilane CH2=CHSi(OCH3)3 148.2 0.97 1.391 32 123 515 2.2066 Crosslinked polyethylene
SC-35 3-Methacryloxy propyl trimethoxysilane
CH3 | CH2=C-C-O-C3H6Si(OCH3)3 ⇓ O
 248.4 1.04 1.429 125 255 314 2.2076 Unsaturated polyesters
SC-38 Ethylenetrimethoxy-silane C2H4Si(OCH3)3 247.4 1.06 1.448 163 310 317 3.2647 Epoxy, phenolic melamine
SC-48 3-Glycidyloxypropyl trimethoxysilane
CH2--CHCH2OC3H6Si(OCH3)3 \ / O
 236.3 1.07 1.427 149 290 330 2.2071 Epoxy, phenolic melamine
SC-42 3-Glycidyloxypropyl methyldiethoxysilane
CH3 | CH2--CHCH2OC3H6Si(OC2H5)2 \ / O
 248.4 0.98 1.431 128 259 356 2.2072 Epoxy, phenolic, melamine
SC-36 N-2-(Aminoethyl)-3-aminopropyl trimethoxysilane H2NC2H2NHC3H6Si(OCH3)3 222.4 1.02 1.445 128 259 351 2.2083 Epoxy, phenolic melamine
SC-26 N-2-(Aminoethyl)-3-aminopropyl trimethoxysilane
CH3 | H2NC2H4NHC3H6Si(OCH3)2
 206.4 0.97 1.445 110 234 380 2.2084 Epoxy, phenolic melamine furan.
SC-39 3-Aminopropyl Triethoxysilane H2NC3H6Si(OC2H5)3 221.4 0.94 1.420 98 217 353 2.2061 Nylon, epoxy phenolic, melamine
SC-75 N-Phenyl-3-aminopropyl trimethoxysilane C6H5NHC3H6Si(OCH3)3 255.4 1.07 1.504 165 312 307 3.2644 Polyimide epoxy phenolic melamine
SC-81 3-Mercaptopropyl trimethoxysilane HSC3H6Si(OCH3)3 196.4 1.06 1.440 99 219 398 2.2045 Rubbers
SC-17 3-Chloropropyl trimethoxysilane ClC3H6Si(OCH3)3 198.7 1.08 1.418 83 196 393 2.2079 Epoxy

Silanes Applications

Silanes are first categorized by their primary function – coupling agents or crosslinking agents – and secondly by their specific molecular functional groups.

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Chemical Group Functionality and Use Applications
Aminosilanes
(SC-26, SC-36, SC-39, SC-75) 		Adhesion Promotion Bonding on glass, metal, ceramics
Industrial Fillers Glass fiber reinforcement
Used in mineral filler treatments
Pigment dispersion
Compatibility Polyurethane, phenolic, epoxy resins
Use Composites, molding, electronics encapsulants,
automotive sealants
Vinylsilanes
(SC-13, SC-23, SC-33, SC-43) 		Polymerization/Crosslinking Thermoplastics Modifiers
Mechanical Reinforcement Increased strength and flexibility of plastics and rubbers
Use Plastic packaging, heat resistant pipes, aerospace
parts, high voltage cables
Epoxysilanes
(SC-42, SC-48) 		Chemical and thermal resistance Compatiblity to epoxy, polyurethane, acrylic resins
Use Heavy-duty adhesives, protective paints, water
Resistant industrial coatings, electronics packaging
Alkoxy & Chlorosilanes
(SC-17, SC-37,
SC-38) 		Silylation Chemical manufacturing of intermediates
Surface Modification Rendering hydrophobicity to substrates
Use Water repellant treatments
Moisture scavangers
Chemical synthesis reagents
Mercaptosilanes
(SC-81) 		Elastomer coupling Create strong bonds of silica fillers and natural or synthetic rubbers
Enhancement of physical properties Increase tearing resistance and flexibility of compounds under high dynamic stress
Use Industrial gaskets, mechanical seals, automotive
belts, high performance tire treads
Metacryloxy silanes
(SC-35) 		Reactive curable agent for UV and
Acrylic systems 		Specifically made for acrylic pressure-sensitive
adhesives, radiation-cured inks and light-curable
systems
Use Dental composites, adhesives, industrial coatings,
artificial stones