Gelest and Bimax are actively monitoring the global COVID-19 situation. We are working with our key suppliers to ensure uninterrupted supply chains and have not seen significant delays. With the safety of our employees uppermost in mind, our manufacturing sites continue to operate at full capacity in compliance with guidelines set out by the Commonwealth of Pennsylvania and the United States Government. We will provide updates if the situation changes.

Tools & Calculators

Silane Required for Surface Coverage - Hydrolytic Deposition Creating a Minimum Uniform Coverage

The majority of surface modifications are affected by the hydrolytic deposition of trialkoxysilanes. Specific Wetting Surface (SWS) is a value determined empirically for the amount of silane required to obtain a minimum uniform multilayer coverage of a substrate. This calculator uses SWS numbers for different silanes to tell you the suggested amount of silane to use on a substrate.

Amount of Silane Required (g)

0

Surface Area of Common Substrates

Type

E-Glass

Silica, ground

Silica, diatomaceous

Calcium silicate

Clay, kaolin

Talc

Silica, fumed

m^2/g

0.10-0.12

1.0-2.0

1.0-3.5

2.6

7

7

150-250


Suggested Starting Ratios of Hydride Functional Siloxanes (Parts) to 100 Parts Vinylsiloxane

Calculation below is based on 1:1.5 molar ratio of vinyl to hydride

Parts Hydrosiloxane

0

Parts Vinylsiloxane

100

Formulation is based on 1.5 Si-H to 1 Vinyl-Si; filled formulations may require up to 3x of Si-H amount listed. Optimal cure ratio is determined by measuring the hardness of cured elastomers at different ratios


©

Copyright 1991 - 2020 Gelest, Inc.