KBM-502 Equivalent Silane Coupling Agent Specs & Data
Technical Specifications and CAS Comparison for KBM-502 Equivalent Silane Coupling Agent
CAS 14513-34-9 defines a methacryloxy functionalized silane coupling agent critical for high-performance composite manufacturing. This chemical structure combines a polymerizable methacryloxy group with hydrolyzable alkoxy silane functionality, enabling covalent bonding between inorganic fillers and organic resin matrices. At NINGBO INNO PHARMCHEM CO.,LTD., production focuses on maintaining strict industrial purity standards to ensure consistent reactivity and batch-to-batch reproducibility. The material is typically supplied as a clear, colorless liquid with a specific gravity approximating 1.000 at 25°C.
For R&D teams evaluating a 3-(Trimethoxysilyl)propyl Methacrylate MEMO equivalent, verifying physical constants against industry benchmarks is essential for process validation. The methoxy functionalization offers faster hydrolysis kinetics compared to ethoxy variants, reducing cycle times in surface treatment applications. The following table outlines the typical physical properties associated with this CAS number, serving as a performance benchmark for quality control.
| Parameter | Specification Value | Test Condition |
|---|---|---|
| Chemical Name | 3-Methacryloxypropyl methyldimethoxysilane | - |
| CAS Number | 14513-34-9 | - |
| Specific Gravity | 1.000 | @ 25°C |
| Refractive Index | 1.433 | @ 25°C |
| Boiling Point | 83°C | @ 0.39 kPa |
| Flash Point | 115°C | Closed Cup |
| Functional Group | Methacryloxy | Organic Reactive |
These specifications indicate a volatile profile requiring careful handling during high-temperature compounding. The boiling point under vacuum suggests suitability for processes where residual monomer removal is necessary. Maintaining these parameters ensures the silane acts as an effective adhesive promoter without compromising the thermal stability of the final composite.
Hydrolysis Stability and Reactivity Differences in Methacryloxy Silane Coupling Agents
The reactivity of methacryloxy silanes is governed by the hydrolysis rate of the alkoxy groups. Methoxy-functionalized silanes exhibit faster hydrolysis kinetics than ethoxy-functionalized counterparts, which impacts solution stability and pot life. When preparing aqueous solutions for surface treatment, the pH must be carefully controlled to prevent premature condensation into siloxane oligomers. Data indicates that a pH of approximately 4.0, adjusted using acetic acid, provides optimal stability for this chemical class.
Under these acidic conditions, the alkoxysilyl group reacts with water to yield silanol groups. These silanols are unstable in neutral or alkaline environments and will rapidly condense. In weakly acidic solutions, the protonation of the silanol oxygen slows condensation, extending the usable life of the treatment bath. However, even under optimal pH control, aqueous solutions of this methacryloxy silane have a limited shelf-life, typically up to 1 day. This necessitates just-in-time preparation for large-scale wet processing methods.
For dry processing or integral blending, hydrolysis occurs in situ via atmospheric moisture or moisture present within the filler substrate. The faster reaction rate of the methoxy group ensures efficient bonding during short mixing cycles. R&D teams should account for the generation of methanol as a byproduct during hydrolysis, ensuring adequate ventilation in manufacturing facilities. The synthesis route for these materials prioritizes minimizing chloride content to prevent corrosion in sensitive electronic applications.
Adhesion Performance Metrics for Polyethylene Polystyrene ABS and Unsaturated Polyester
Methacryloxy functional groups provide compatibility with a wide range of thermoplastic and thermosetting resins. The unsaturated carbon-carbon bond in the methacryloxy group can copolymerize with organic matrices, while the silanol end bonds to inorganic surfaces. This dual reactivity makes the material highly effective for improving adhesion in polyethylene, polystyrene, ABS, and unsaturated polyester systems.
In unsaturated polyester resins, the silane coupling agent participates in the crosslinking reaction. The methacryloxy group copolymerizes with the styrene and polyester backbone, creating a chemical bridge to glass fibers or mineral fillers. This results in improved wet mechanical strength and retention of properties under humid conditions. For polystyrene and ABS, the aromatic and nitrile components interact favorably with the organic tail of the silane, enhancing interfacial wetting.
Polyethylene presents a challenge due to its non-polar nature. However, when used in conjunction with peroxide crosslinking or grafting processes, the methacryloxy silane can be grafted onto the polyethylene backbone. This modification introduces polar sites that improve adhesion to inorganic substrates. Performance metrics typically show significant improvements in peel strength and shear resistance when the silane is applied as a primer or additive. The effectiveness is dependent on the abundance of functional groups remaining after processing and the overall polarity of the resin system.
Mechanical Strength Enhancement in Peroxide Crosslinked EPDM Applications
EPDM rubber compounds often require reinforcement with silica or other inorganic fillers to achieve desired mechanical properties. The use of methacryloxy silanes in peroxide-cured EPDM systems enhances the interaction between the rubber matrix and the filler surface. During the curing process, the peroxide generates free radicals that can initiate bonding between the silane's organic group and the polymer chain.
This chemical coupling reduces the tendency for filler agglomeration and improves dispersion within the rubber matrix. Enhanced dispersion leads to higher tensile strength, improved tear resistance, and better abrasion performance. Additionally, the covalent bonds formed at the interface reduce stress concentration points, which are common failure sites in filled elastomers.
Water resistance is another critical metric for EPDM applications, particularly in automotive sealing or outdoor construction profiles. The hydrophobic nature of the cured silane layer protects the inorganic filler from moisture ingress, preventing hydrolytic degradation of the interface. This stability ensures long-term retention of mechanical properties even after prolonged exposure to humid environments or water immersion. Formulators should optimize silane loading levels to balance processing viscosity with final cured properties.
Formulation Optimization Strategies for Replacing KBM-502 in Composite Materials
Transitioning to a new supply source for CAS 14513-34-9 requires a systematic approach to formulation validation. As a global manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. supports customers with technical data to facilitate drop-in replacement strategies. The primary consideration is the method of incorporation: surface treatment of inorganic materials or addition to organic materials.
For surface treatment, the wet method involves mixing fillers into a dilute silane solution (0.1 - 2.0%). This ensures uniform coverage but requires drying steps to remove water and methanol. The dry method utilizes high-shear mixers to apply neat silane or concentrated solutions directly to fillers. This is preferred for large-scale production due to lower waste generation and faster throughput, though uniformity must be verified via extraction testing.
Integral blending involves adding the silane directly to the resin during compounding. This method offers excellent process efficiency but may require adjustments to cure kinetics. In thermosetting systems, it is recommended to react the organic functional group of the silane with the resin before final curing. For thermoplastics, masterbatch preparation allows for easier handling and dispersion. A formulation guide should include rheological studies to ensure the silane does not adversely affect melt flow indices.
Quality control protocols must verify GC-MS purity and functional group content upon receipt. Storage conditions are critical; the product should be kept in a cool, dark, and dry place to prevent premature hydrolysis. Containers must be tightly sealed and purged with dry nitrogen after opening. By adhering to these handling precautions and processing parameters, manufacturers can achieve consistent composite performance matching established industry standards.
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