KBM-403

Shin-Etsu Chemical Co., Ltd.

Shin-Etsu Chemical Co., Ltd. · KBM

KBM-403 is an epoxy-functional silane coupling agent, specifically 3-glycidoxypropyltrimethoxysilane, used to enhance adhesion and durability in composite materials. It improves mechanical strength, water resistance, and heat resistance in heat-curable systems like epoxies, phenolics, and melamines. It is suitable for applications with substrates such as glass, metals, and fillers in thermoplastics and thermosets.

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Specifications

Identifiers

Chemical name
(3-Glycidoxypropyl)trimethoxysilane
CAS number(s)
2530-83-8
EC number
219-784-2
Molecular formula
C9H20O5Si
InChI key
BPSIOYPQMFLKFR-UHFFFAOYSA-N
Synonyms
Epoxy Silane Coupling Agent, Trimethoxy[3-(2-oxiranylmethoxy)propyl]silane, 3-Glycidyloxypropyltrimethoxysilane

Technical specifications

Properties

PropertyValueUnit
Physical StateLiquid-
ColorColorless, transparent-
OdorSlight odor-
Boiling Point290°C
Vapor Pressure< 10 (at 25 °C)mmHg
Vapor Density> 1 (Air = 1)-
Specific Gravity1.07 (at 25 °C)-
Evaporation Rate< 1 (Butyl acetate = 1)-
Solubility in WaterHydrolyzed gradually-
Flash Point149 (Open cup), > 94 (Closed cup)°C

Specifications

Test ConditionSpecificationValueUnitTest Method
-AppearanceColorless, transparent--
at 25 °CSpecific Gravity1.07--
-Flash Point135°C-
at 25 °CRefractive Index1.429--
at 2 mmHgBoiling Point120°C-
Industries
Adhesives & SealantsCASECarePaints & CoatingsPlastics & Rubber
Product groups
Silanes & SiloxanesSilane Coupling AgentsSilicones
Applications
Plastic manufacturingAdhesives & sealants formulationsIndustrial coatings
Functions
Coupling agentCuring agentMonomerAdhesion promoter
Market segments
Protective coatingsAdhesivesPlastics

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