Dynasylan® SILBOND® Condensed

Identification & Functionality

Chemical Family

Silicates

Chemical Name

Tetraethyl orthosilicate

CASE Ingredients Functions

Adhesion Promoter,

Binder & Resin,

Coupling Agent,

Surface Modifier

Plastics & Elastomers Functions

Crosslinking Agent

Technologies

CASE Ingredients,

Elastomers,

Industrial Additives & Materials

Product Families

CASE Ingredients — Additives

Functional Additives,

Surface Modifiers

Elastomers — Elastomer Additives

Catalysts, Initiators & Crosslinkers

Industrial Additives & Materials — Processing Aids

Other Processing Additives

CASE Ingredients — Resins & Binders

Other Resins & Binders

Features & Benefits

Labeling Claims

Low VOC

CASE Ingredients Features

Abrasion Resistance,

Excellent Scratch Resistance,

Low Viscosity

Materials Features

Chemical Resistant,

Good Mechanical Properties,

Good Thermal Stability,

Low Viscosity

Applications & Uses

Markets

Adhesives & Sealants,

Building & Construction,

Electrical & Electronics,

Paints & Coatings

Applications

Adhesives & Sealants — Building & Construction

Sealants & Caulks

Building & Construction — Building Materials

Pipes & Plumbing

Paints & Coatings — Industrial Coatings

Industrial Coatings

Electrical & Electronics — Wire & Cable

Jacketing & Insulation

Applicable Processes

Investment Casting

Compatible Polymers & Resins

Silicones

Plastics & Elastomers End Uses

Cables,

Pipes

Application Characteristics

• Dynasylan® SILBOND® Condensed is a ready source of silicic acid for many applications. Silicic acid is usually obtained by hydrolysis, or thermally by condensation at elevated temperatures.
• The resulting silicic acid bonds well to many inorganic substrates and can be deposited in-situ in a controlled manner.
• The surfaces of glass, metals, pigments, fillers, and synthetic fibers can be coated withy a very thin SiO2 layer in order to improve chemical and thermal stability, and mechanical properties.
• Other applications are:
• binders for fillers in inorganic zinc-rich paints or precision investment castings
• crosslinkers in silicone rubber systems
• drying agents in sealing compositions
• Dynasylan® SILBOND® Condensed is an important starting material for sol-gel processes, where the additional use of alkylalokoxysilanes (e.g. Dynasylan® MTES) can give the siloxane network a slight organic character as a result of the incorporation of alkyl groups.
• It is also possible to construct an inorganic/organic network by adding silanes containing organofunctional groups (e.g. aminopropyl groups) and polymerizing with organic precursors.
• This principle makes it possible to obtain highly scratch- and abrasion-resistant coatings.
• Dynasylan® SILBOND® Condensed is immiscible with water, so hydrolysis requires the use of a co-solvent such as ethanol.
• Suitable catalysts are mineral acids or ammonia, or even acetic acid and amines.
• Partial hydrolysis gives hydrolysates of Dynasylan® SILBOND® Condensed whose shelf-life depends on the amount of water and solvent used.
• The amount of water determines the activity of the hydrolysate.
• Activity and shelf-life are inversely proportional.
• The correct choice for the amount of water can give hydrolysates, which have a shelf-life of up to a year (from the time of manufacture).

Properties

Physical Form

Liquid

Appearance

Clear low - viscous liquid

Technical Data

	Value	Units	Test Method / Conditions
Density (at 20°C)	0.930 - 0.940	g/cm³	QC07100P
Boiling Point	167.0	°C	—
Viscosity (at 20°C)	0.75	mPa.s	—
Flash Point	46.0	°C	—
Silica Content (as SiO₂)	min. 28.0	% wt	QC07106P
Purity (GC-TCD)	min.96.5	%	QC07105P

Packaging & Availability

Packaging Type

Bulk,

Drums,

Pails,

Totes (IBC)

Packaging Information

Dynasylan® SILBOND® Condensed could be available in pails, drums, totes, and tanker quantities.

Storage & Handling

Shelf Life

24 months