Dynasylan® SILBOND® 50

Dynasylan® SILBOND® 50 is a clear, low-viscosity liquid that is one of the most concentrated forms of available silica, ranging from 45.0% to 47.0% (the Si content of Dynasylan® SILBOND® 50 is calculated as SiO2 ). Dynasylan® SILBOND® 50 is an ethyl polysilicate that is the partially hydrolyzed product of tetraethyl orthosilicate (TEOS). The partial hydrolysis of TEOS (Si[OEt]4 ) results in the conversion of ethoxy groups to hydroxyl groups forming silanols. Subsequent condensation of silanols will form siloxane bonds (-Si-O-Si-O-) and eventually cause the material to gel. Dynasylan® SILBOND® 50 is often used as an intermediate, which is further hydrolyzed to produce a binder that can be used for many applications. This binder is used for inorganic zinc-rich primers, investment casting molds, cores and ceramic shapes, and coatings.

Principal: Silbond Corporation

Functions: Adhesion Promoter, Binder, Binder & Resin, Coupling Agent, Coupling Agent, Crosslinking Agent, Intermediate, Surface Modifier

Chemical Family: Silicates

End Uses: Chemical-Resistant Coatings, Primer, Slurries

Compatible Substrates & Surfaces: Ceramic, Glass, Metal

Compatible Polymers & Resins: Silicones

Applicable Processes: Investment Casting, Precision Casting, Sol-Gel Process

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Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Applicable Processes
Coating End Applications
Compatible Polymers & Resins
Compatible Substrates & Surfaces
Industrial Additives End Use
Markets
Applications
Application Information
  • Similar to Dynasylan® SILBOND® Condensed, Dynasylan® SILBOND® 40 is used to deposit silicic acid formed as a result of complete hydrolysis. The resulting silicic acid bonds well to many inorganic substrates, such as glass, ceramic, metal, fillers, pigments, and synthetic fibers. The deposition of a thin SiO2 layer improves the chemical and thermal stability and mechanical properties.

Other applications are:

  1. Binder, especially as Dynasylan® SILBOND® H- or HT- binders for inorganic zinc-rich coatings or precision investment castings.
  2. Encapsulant for hydroxyl poor fillers to enhance adhesion with functional silanes.
  3. Crosslinker component in cold-curing silicone rubber systems
  4. Hardening component in dentistry for impression materials and as a binder for embedding material.
  • Dynasylan® SILBOND® 40 is also used as starting material for sol-gel processes. It is usually used in conjunction with alkylsilanes (e.g. Dynasylan® MTES) organofunctional silanes and/or organic precursors (e.g. organic resins) to form siloxane networks. This makes it possible to obtain highly scratch-, abrasion-, and chemical-resistant coatings.
  • Dynasylan® SILBOND® 40 or its hydrolysates are also the binder component for 1- and 2-pack inorganic zinc-rich coatings, for corrosion protection on steel, and for slurries used in precision investment castings.

Properties

Physical Form

Packaging & Availability

Packaging Type

Principal Information

Group Principal Number
S000006
Principal

Other

Appearance
Clear liquid
Color (SDS)
Colorless
IATA/ICAO Proper Shipping Name
Flammable liquid, N.O.S. (ethyl silicate, ethyl alcohol)
IATA/ICAO UN Number
UN 1993
IMO/IMDG EmS Fire
F-E
IMO/IMDG EmS Spill
S-E
IMO/IMDG Proper Shipping Name
Flammable liquid, N.O.S. (ethyl silicate, ethyl alcohol)
IMO/IMDG UN Number
UN 1993
Immiscible In (SDS)
Water
Item Number
Odor (SDS)
Ester like
Other Hazards
None
USA/DOT Emergency Response Guide Number
128
USA/DOT Proper Shipping Name
Flammable liquids, N.O.S. (ethyl silicate, ethyl alcohol)
USA/DOT UN Number
UN 1993
Shelf Life & Stability
ValueUnitsTest Method / Conditions
Shelf Life12.0 momo
Physical Properties
ValueUnitsTest Method / Conditions
Boiling Point160.0 °C°C
Density1.095-1.15 g/cm³g/cm³At 20°C
Flash Point27.0 °C°C
Viscosity5.0 mPa.smPa.sAt 20°C
Material Composition
ValueUnitsTest Method / Conditions
Silicon Content45.0-47.0 %(W/W)%(W/W)as silicon dioxide
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Boiling Point (SDS)160.0 °C°CAt 1013 Hpa, Start Of Boiling
Decomposition Temperature (SDS)min. 200.0 °C°C
Density (SDS)1.06 g/cm³g/cm³DIN 51757 at 20°C
Flash Point (SDS)27.22 °C°C
Freeze Point (SDS)-60.0 °C°C
Ignition Temperature (SDS)235.0 °C°CDIN 51794
Vapor Pressure (SDS)max. 2.0 hPahPaat 20°C
Viscosity (SDS)5.0 mPa.smPa.sDIN 53015 at 20°C