Binder

Dynasylan® A

Dynasylan® A is the ethyl ester of orthosilicic acid. In the literature it is frequently also referred to under the name TEOS (tetraethoxysilane). Dynasylan® A is a colourless, low-viscosity liquid with SiO₂ content of 28.5%. Use requires acid- or alkali-catalysed hydrolysis. Since all 4 ethoxy groups are able to participate in this reaction, Dynasylan® A is regarded as tetrafunctional. Hydrolysis leads to silanol groups which, in a subsequent condensation reaction, form very stable siloxane bonds (-Si-O-Si-). Condensation starts before hydrolysis is complete. During storage of these hydrolysates condensation continues until a gel is formed. The rate of gelation depends on the concentration of water.

Product information

Type

Binder

Sub type

Silane

Markets

Technologies

High solids (solventborne)
Solventborne
Solventfree

Manufacturer

Dynasylan Logo

Availability

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