KBM-3033
Shin-Etsu Chemical Co., Ltd. · KBM
KBM-3033 is a versatile silane coupling agent known for its hydrophobic properties, low surface energy, and excellent adhesion. It is widely used in coatings to enhance water and oil repellency, weather and chemical resistance, and adhesion to substrates like glass, ceramics, concrete, and metals. Its reactive methoxy groups form durable bonds, making it suitable for a variety of industrial applications such as coatings and surface treatments.
- Good adhesion
- High chemical resistance
- Improved water resistance
- Easy to use
- Good weathering properties
- Excellent solvent resistance
Specifications
Identifiers
- Chemical name
- n-Propyltrimethoxysilane
- CAS number(s)
- 1067-25-0
- EC number
- 213-926-7
- Molecular formula
- C6H16O3Si
- InChI key
- HQYALQRYBUJWDH-UHFFFAOYSA-N
- Synonyms
- Silane Coupling Agent, Propyltrimethoxysilane, Silane, Trimethoxypropyl-, Trimethoxy(Propyl)Silane
Technical specifications
Properties
| Property | Value | Unit |
|---|---|---|
| Physical State | Liquid | - |
| Color | Colorless, transparent | - |
| Odor | Slight odor | - |
| Boiling Point | 142 | °C |
| Vapor Pressure | < 30 (at 25 °C) | mmHg |
| Vapor Density | 5.6 (Air = 1) | - |
| Specific Gravity | 0.93 (at 25 °C) | - |
| Evaporation Rate | > 1 (Butyl acetate = 1) | - |
| Solubility in Water | Not soluble (Hydrolyzed with water) | - |
| Flash Point | 36 (Closed cup) | °C |
Specifications
| Test Condition | Specification | Value | Unit | Test Method |
|---|---|---|---|---|
| - | Appearance | Colorless, transparent | - | - |
| - | Boiling Point | 142 | °C | - |
| - | Flash Point | 34 | °C | - |
| at 20 °C | Specific Gravity | 0.932 | - | - |
| at 20 °C | Refractive Index | 1.388 | - | - |
| - | Purity by GC | > 98.0 | % | - |
| - | Critical Surface Tension | 28.5 | dyne/cm | - |
| Minimum requirement = 75% | Reduction in Water Absorption | 84 | % | NCHRP 244 |
| Minimum requirement = 75% | Reduction in Chloride Ion Intrusion | 86 | % | NCHRP 244 |
| 3-day immersion in 0.25 inches of water | Water Absorption (Mortar Cubes) | 0.37 | % | ASTM D 6532 |
| Relative to untreated control cubes | Water Exclusion | 96 | % | ASTM D 6532 |
- Product groups
- Silanes & SiloxanesSiliconesSilanes
- Applications
- Concrete sealing & protectionFiller surface treatmentPaints & coatings formulationsGlass-reinforced composites
- Functions
- Adhesion promoterDispersantAdditiveFlow modifierWater repellent
- Market segments
- Glass & opticsConstruction materialsPaints & coatings additives
Documents
- Request a copy
Technical Data Sheet (TDS)
Specifications & performance data
- Request a copy
Safety Data Sheet (SDS)
Safety information & handling