Dynasylan® PTMO

Dynasylan® PTMO an alkyltrialkoxysilane is important component in sol­gel systems. Dynasylan® PTMO is a colorless, low­viscosity liquid. Dynasylan® PTMO is regarded as trifunctional since all three alkoxy groups can hydrolyze. Dynasylan® PTMO also contains a propyl group that adds hydrophobic character to sol­gel coatings. Hydrolysis leads to silanol groups which, in a subsequent condensation reaction, form very stable siloxane bonds (­Si­O­Si­). Condensation occurs parallel to hydrolysis once a certain amount of silanol groups have been formed. The absolute and relative rates of hydrolysis and condensation depend on a number of factors. The most important factors include pH, concentration, solvent, temperature and the catalyst.

Principal: Evonik Corporation Silanes

Functions: Surface Modifier

Chemical Family: Silanes

Features: Low Viscosity, Mar Resistance, UV Resistance

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Enhanced TDS

Identification & Functionality

Blend
No
CASE Ingredients Functions
Chemical Family
Chemical Name
Function
Surface Modifier
Product Code
MITM04178
Single Ingredient
Yes
Technologies
Product Families

Features & Benefits

Applications & Uses

Markets
Applications
Product Application

Dynasylan® PTMO reacts faster with water than Dynasylan® PTEO. To regulate the rate of hydrolysis and condensation a catalyst (mineral acids or ammonia, or even acetic acid and amines) can be added. Hydrolysis can also be furthered by adding a co­solvent such as an alcohol.

Properties

Physical Form
Key Properties
  • In some sol­gel applications Dynasylan® PTMO is partially hydrolyzed to form a preproduct that can be further crosslinked using temperature. This pre­hydrolysis often is done in conjunction with other organofunctional silanes (e.g. Dynasylan® GLYMO), silicic acid esters or even an aqueous silica sol.
  • This pre­product can be further modified by addition of organic resins or inorganic nanoparticles such as AEROSIL®. It is also possible to construct an inorganic/organic network by adding silanes containing organofunctional groups (e.g. aminopropyl groups) and organic resins.
  • The mixture is then cured using standard organic methods. In this way it is possible to obtain mar resistant coatings having a higher UV­stability than traditional organic coatings. This can also lead to more flame resistant materials than using traditional resins.

Regulatory & Compliance

Packaging & Availability

Packaging Type
Product Packaging

Dynasylan® PTMO is sold in 25 kg and 180 kg drums.

Storage & Handling

Storage Conditions

Dynasylan® PTMO must be stored with exclusion of moisture.

Other

Appearance
Clear colorless liquid
Autoignition Temperature (SDS)
245.0 °C
Boiling Point (SDS)
137.0 °C
Color (SDS)
Colorless
Density
0.94 g/cm³
Density (SDS)
0.94 g/cm³
Flash Point
35.0 °C
Flash Point (SDS)
35.0 °C
IATA/ICAO UN Number
UN 1993
IMO/IMDG EmS Fire
F-E
IMO/IMDG EmS Spill
S-E
IMO/IMDG UN Number
UN 1993
Immiscible In (SDS)
Water
Initial Boiling Point
137.0 °C
Item Number
Melting Point (SDS)
max. -20.0 °C
Odor (SDS)
Aromatic
Other Hazards
None known.
Principal
Shelf Life
12.0 mo
USA/DOT UN Number
UN 1993
Vapor Pressure (SDS)
93.0 hPa
Viscosity
0.7 mPa.s
Viscosity (SDS)
0.7 mPa.s
Shelf Life & Stability
ValueUnitsTest Method / Conditions
Shelf Life12.0 momo
Physical Properties
ValueUnitsTest Method / Conditions
Density0.94 g/cm³g/cm³DIN 51757 At 20°C
Flash Point35.0 °C°CDIN 51755
Initial Boiling Point137.0 °C°CDIN 51751 At 1013 Hpa
Viscosity0.7 mPa.smPa.sDIN 53015 At 20°C
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Autoignition Temperature (SDS)245.0 °C°CDIN 51794
Boiling Point (SDS)137.0 °C°CDIN 51751 at 1013 hPa
Density (SDS)0.94 g/cm³g/cm³DIN 51757 at 20°C
Flash Point (SDS)35.0 °C°CDIN EN ISO 13736
Melting Point (SDS)max. -20.0 °C°C
Vapor Pressure (SDS)93.0 hPahPaat 20°C
Viscosity (SDS)0.7 mPa.smPa.sDIN 53015 at 20°C