KBM-585

Shin-Etsu Chemical Co., Ltd.

Shin-Etsu Chemical Co., Ltd. · KBM

KBM-585 is a ureido-functional silane coupling agent, specifically 100%-active (solvent-free) hydrolysable silane, Ureidopropyltrimethoxysilane. It enhances filler dispersion, lowers viscosity during processing, and improves the performance of thermoplastics and thermosets, particularly in systems with high filler content like polyamide and epoxy composites. Its ureido group offers reduced reactivity and improved shelf life compared to traditional aminosilanes.

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Specifications

Identifiers

Chemical name
3-Ureidopropyltrimethoxysilane
CAS number(s)
23843-64-3
EC number
245-904-8
Molecular formula
C7H18N2O4Si
InChI key
LVACOMKKELLCHJ-UHFFFAOYSA-N
Synonyms
Silane Coupling Agent, 1-[3-(Trimethoxysilyl)propyl]urea, (3-(Trimethoxysilyl)propyl)urea, 3-Trimethoxysilylpropylurea

Technical specifications

Properties

PropertyValueUnit
Physical StateLiquid-
ColorLight yellow, transparent-
OdorAmine odor-
Boiling Point215 (3-Aminopropyltrimethoxysilane impurity)°C
Vapor Pressure< 5 (at 25 °C, 3-Aminopropyltrimethoxysilane, impurity)mmHg
Vapor Density6.2 (Air = 1, 3-Aminopropyltrimethoxysilane, impurity)-
Specific Gravity1.14 (at 25 °C)-
Evaporation Rate< 1 (Butyl acetate = 1)-
Solubility in WaterSoluble-
Flash Point182 (Open cup), > 94 (Open cup)°C

Specifications

Test ConditionSpecificationValueUnitTest Method
-AppearanceColorless to light yellow, transparent--
at 25 °CKinematic Viscosity262cSt-
-Concentration100%-
at 25 °CSpecific Gravity1.142--
-Flash Point182°C-
at 25 °CRefractive Index1.459--
Industries
CareCeramics & glassChemical Manufacturing
Product groups
SiliconesSilanes & SiloxanesSilane Coupling Agents
Applications
ResinsPolymersGlass-reinforced compositesFiller surface treatment
Functions
Adhesion promoterViscosity controllerCoupling agentDispersant
Market segments
Glass & opticsSpecialty chemicals

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