Silane Coupling Agents | Ureido Silanes | Surface Modifiers

SiSiB® PC2520

3-Ureidopropyltriethoxysilane 50% solution in Methanol.
Synonym: N-(Triethoxysilylpropyl)urea 50% solution in Methanol

Countertype of DowCorning Z-6801

Chemical Structure


SiSiB® PC2520 is a bifunctional organosilane having a reactive organic ureido group and a hydrolyzable inorganic triethoxysilyl group. The dual nature of its reactivity allows SiSiB® PC2520 to bind chemically to both inorganic materials (e.g. glass, metals, fillers) and organic polymers (e.g. thermosets, thermoplastics, elastomers), functioning as an adhesion promoter and as a surface modifier.

SiSiB® PC2520 is a 100% 3-Uriedopropyltriethoxysilane.

SiSiB® PC2521 is a 50% solution of silane in methanol.

Typical Physical Properties

Chemical Name: gamma-Ureidopropyltriethoxysilane
CAS No.: 23779-32-0
EINECS No.: 245-876-7
Empirical Formula: C10H24N2O4Si
Molecular Weight: 264.39
Boiling Point: 305°C [760mmHg]
Flash Point: 138°C
Color and Appearance: Light amber paste
Density [25°C]: N/A
Refractive Index [25°C]: N/A
Purity: 97.0% by GC


SiSiB® PC2520 can be used with such polymers as epoxy, phenolic, furan and melamine resins, polyurethanes, PA, PBT, PE, EVA, PP, PVB, PVAC, acrylics and silicones.

SiSiB® PC2520 can be used as a size constituent of finish for glass fiber/glass fabric composites

SiSiB® PC2520 can be used as an additive to phenolic, furan and melamine resins for foundry resins and abrasives.

SiSiB® PC2520 can be used as an additive for sealants and adhesives.

SiSiB® PC2520 can be used as an additive and/or primer for paints and varnishes to improve adhesion to the substrate.The most important effects which can be achieved using PC2521 are improvements in product properties, such as:
Improved mechanical properties: e.g. flexural strength, tensile strength, impact strength, modulus of elasticity.
Improved resistance to moisture and corrosion.
Higher temperature of deflection under load.


SiSiB® PC2520 is usually supplied in 50% methanol solution. SiSiB® PC2521 is supplied in 180Kg steel drum, for more details, please visit Packing Centre. Custom packing is available.

Technical Library

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