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Coupling and Interface Agents / ENVO-N028

3-Aminopropyltriethoxysilane

APTES (KH-550) is an aminosilane coupling agent. Moisture uptake and surface reactions affect interfacial performance.

3-Aminopropyltriethoxysilane · Chemical structure from PubChem.
Chemical structure from PubChem. · Image source
Trial objective
Glass or mineral surface coupling / Filler-modified composites
Acceptance checks
Density at 20 °C, Principal silane content, Wet adhesion retention
Density at 20 °C (g/cm³)
Evonik Dynasylan AMEO third-party typical value, approximately 0.95
01 / Applications and trials

Plan a trial for your application

Glass or mineral surface coupling

Use the same substrate and pretreatment. Compare dry adhesion and adhesion retention after humid heat aging.

Filler-modified composites

With the same filler and cure formulation, compare dispersion, strength and interfacial performance after water uptake.

02 / Quality and acceptance

Purchase specifications and incoming inspection

Include the intended grade or current specification in the enquiry. Use the table to compare selection criteria and inspection conditions. The specification agreed by both parties defines the contractual limits. Evonik · Dynasylan AMEO technical data and test conditions ↗

Property Unit Published or agreed specification Test conditions and checks
Density at 20 °C g/cm³ Evonik Dynasylan AMEO third-party typical value, approximately 0.95 The cited sheet specifies DIN 51757. Confirm the purity of the proposed silane separately when ordering.
Principal silane content % by mass Use the COA for the offered grade. Check the chromatographic reporting basis and list water and hydrolysis products separately.
Wet adhesion retention % Agree on the actual substrate. Fix curing and water-immersion conditions and compare wet and dry results.

When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.

Chemical identity

Database entry Molecular or composition formula Molar mass
(3-Aminopropyl)triethoxysilane C9H23NO3Si 221.37 g/mol

The values refer to the compound indicated. Confirm hydrate form, solution concentration and blend composition for the commercial grade.

03 / Packaging and delivery

From samples to commercial delivery

Packaging and receiving

Select sealed drums or smaller packs according to use per opening. Check closure and container dryness.

Storage and handling

Record lot and exposure time after opening. A repeatedly sampled container is not equivalent to a factory retention sample.

Sample and order lead times

State the finished part, machine trial quantity and routine order size. Match trial and commercial grades and agree MOQ, load unit, lead-time start and arrival.

Request a quote ↗

04 / Troubleshooting

Questions from the plant

Why does adhesion vary after apparently identical surface treatment?

Fix pretreatment and cure. Compare dry and wet adhesion before and after treatment.

Why did an opened drum perform differently on its second use?

Check sealing, sampling humidity and substrate moisture. Retest against an unopened sample from the same lot.

Report a delivery or batch issue

Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check chemical identity and purity, Moisture, substrate surface condition.

Report a batch issue ↗

05 / Product documents

Request documents for your application

TDS · Technical data sheet

For grade selection and sample approval, specify the grade and revision required.

Request a TDS ↗

SDS · Safety data sheet

Specify the country or region of use and the required language.

Request an SDS ↗

COA · Certificate of analysis

Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.

Request a COA ↗

06 / Sources and related products

Technical references and related products

Send enquiry

Compare application routes