KBM-503

Shin-Etsu Chemical Co., Ltd.

Shin-Etsu Chemical Co., Ltd. · KBM

KBM-503 is a di-functional silane coupling agent with a reactive methacrylic group and three hydrolyzable methoxy groups. It is used to improve adhesion and physical properties in composites and polymers. KBM-503 can cross-link organic polymers with inorganic fillers and metallic substrates, providing enhanced mechanical strength. It is commonly used in optical fibers, acrylics, epoxies, and sol-gel systems.

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Specifications

Identifiers

Chemical name
3-Methacryloxypropyltrimethoxysilane
CAS number(s)
2530-85-0
EC number
219-785-8
Molecular formula
C10H20O5Si
InChI key
XDLMVUHYZWKMMD-UHFFFAOYSA-N
Synonyms
Di-functional Silane Coupling Agent, (3-Methacryloxypropyl)trimethoxysilane, 3-(Trimethoxysilyl)propyl Methacrylate, Methacryloxypropyltrimethoxysilane

Technical specifications

Properties

PropertyValueUnit
Physical StateLiquid-
ColorColorless-
OdorAcryl odor-
Boiling Point84 - 85 (at 4 mmHg)°C
Melting Point< -80°C
Flash Point79 (Closed cup)°C
Specific Gravity1.032 (at 25 °C)-
Vapor Density5.87 (Air = 1)-
Solubility in WaterNot soluble (Hydrolyzed with water)-

Specifications

Test ConditionSpecificationValueUnitTest Method
-AppearanceColorless to light straw, transparent--
at 25 °CKinematic Viscosity2.5cSt-
at 25 °CSpecific Gravity1.045--
at 25 °CRefractive Index1.431--
-Flash Point92°C-
at 1 mmHgBoiling Point80°C-
-Spreading Rate314m²/g-
-Purity by GC98%-
Industries
CareCeramics & glassChemical ManufacturingElectronics & Electrical
Product groups
SiliconesSilane Coupling AgentsSilanes & Siloxanes
Applications
Optical fibersFiller surface treatmentResinsGlass-reinforced compositesPolymers
Functions
AdditiveCoupling agentAdhesion promoterSurface modifierMonomer
Market segments
Glass & opticsElectronic componentsSpecialty chemicals

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