Cyclohexylaminosilane 95 Percent Purity Specs & Data
Comprehensive Breakdown of Cyclohexylaminosilane 95 Percent Purity Specs
For procurement managers evaluating (N-Cyclohexylamino)methylmethyldiethoxysilane (CAS: 27445-54-1), the critical parameter is the assay purity, which must consistently meet or exceed 95%. This cyclohexylaminosilane is characterized by a specific molecular structure where the cyclohexyl ring provides steric hindrance, differentiating its reactivity profile from linear alpha-amino silanes. The technical specification sheet for this material typically dictates a clear, colorless to light yellow liquid appearance, indicating minimal oxidation or polymerization during synthesis.
Physical constants are equally vital for process integration. The specific gravity at 25°C generally falls within the range of 0.9400 ± 0.0100 g/cm³, while the refractive index (nD25) is maintained between 1.4490 and 1.4510. Deviations in these values often signal the presence of hydrolysis byproducts, such as ethanol or silanols, which can compromise the shelf-life of the bulk chemical. At NINGBO INNO PHARMCHEM CO.,LTD., the manufacturing protocol ensures that the ethoxy groups remain intact until intentional hydrolysis is triggered during downstream formulation.
The following table outlines the critical quality parameters required for high-grade industrial applications, comparing standard market tolerances against rigorous factory supply specifications:
| Parameter | Standard Industry Grade | High Purity Specification (CAS 27445-54-1) |
|---|---|---|
| Purity (GC Area %) | 90% - 93% | ≥ 95% |
| Appearance | Yellowish Liquid | Colorless to Light Yellow Clear Liquid |
| Specific Gravity (25°C) | 0.930 - 0.950 g/cm³ | 0.9400 ± 0.0100 g/cm³ |
| Refractive Index (nD25) | 1.4450 - 1.4550 | 1.4490 - 1.4510 |
| Amine Value (mg KOH/g) | 210 - 230 | 225 ± 5 |
| Moisture Content | < 1.0% | < 0.5% |
When sourcing this Silane Coupling Agent, buyers should verify that the Certificate of Analysis (COA) includes Gas Chromatography (GC) traces confirming the absence of higher boiling point oligomers. The presence of di-ethoxy impurities or unreacted starting materials can alter the cross-linking density in final polymer matrices.
Performance Advantages of (N-Cyclohexylamino)methylmethyldiethoxysilane in Industrial Resins
The incorporation of the cyclohexyl group into the silane backbone imparts distinct performance advantages over traditional alkyl amino silanes. In industrial resin formulations, this structure acts as a robust Textile Softener Intermediate and a highly effective adhesion promoter. The bulky cyclohexyl ring reduces the nucleophilicity of the nitrogen atom slightly compared to primary amines, which moderates the reaction rate with epoxy groups. This controlled reactivity extends the pot life of two-component systems while maintaining high final cross-link density.
Furthermore, the hydrophobic nature of the cyclohexyl ring enhances the water resistance of cured coatings. When used as a Silicone Oil Modifier, it improves the compatibility of amino-functional silicone fluids with organic substrates, reducing phase separation issues. This makes it an ideal candidate for formulators seeking a drop-in replacement for more volatile or less stable amino silanes. For applications requiring specific sealant performance, formulators often evaluate (N-Cyclohexylamino)methylmethyldiethoxysilane as a Wacker Geniosil Xl 924 Alternative Silane due to its balanced hydrolysis stability and adhesion properties on glass and metal substrates.
In epoxy systems, the secondary amine functionality facilitates ring-opening polymerization without the rapid exotherm associated with aliphatic primary amines. This thermal management is crucial for thick-section castings or large-scale composite manufacturing where heat dissipation is a challenge. The dual functionality allows the molecule to bind chemically to inorganic fillers via the silanol groups formed upon hydrolysis, while the amino group covalently bonds with the organic polymer matrix.
Quality Control Measures Ensuring Consistent 95 Percent Purity Levels
Maintaining a purity level of 95% minimum requires stringent control over the amination and distillation stages of synthesis. The primary analytical tool for verifying this specification is Gas Chromatography-Mass Spectrometry (GC-MS). This technique separates the target silane from byproducts such as unreacted chlorosilanes, over-aminated species, or hydrolysis condensates. A high-resolution capillary column is essential to resolve the cyclohexylaminosilane peak from closely eluting impurities.
Moisture control is another critical vector in quality assurance. Since alkoxysilanes are susceptible to moisture-induced condensation, the water content in the final product must be kept below 0.5%. Karl Fischer titration is employed on every batch to ensure that the ethoxy groups have not prematurely hydrolyzed during storage or packaging. Elevated moisture levels can lead to the formation of polysiloxanes, increasing viscosity and potentially causing gelation in the drum.
Additionally, the amine value is titrated to confirm the stoichiometry of the nitrogen functionality. A deviation in amine value often indicates the presence of non-aminated silanes or diamine impurities. At NINGBO INNO PHARMCHEM CO.,LTD., batch consistency is validated through triplicate testing of physical constants and chemical assays before the release of any COA. This data-driven approach ensures that the (N-Cyclohexylamino)methylmethyldiethoxysilane Silicone Oil Modifier supplied meets the rigorous demands of downstream polymer synthesis.
Compatibility Guide for Cyclohexyl Amino Silanes in Epoxy and Polyurethane Systems
When integrating cyclohexyl amino silanes into epoxy systems, the stoichiometric ratio of amine hydrogen to epoxy equivalent weight must be calculated carefully. Unlike linear aminopropyl silanes, the steric bulk of the cyclohexyl group may require slight adjustments in curing agent loading to achieve full conversion. The compatibility with bisphenol-A based epoxies is excellent, providing superior adhesion to glass fibers and mineral fillers. In powder coatings, this silane serves as an effective additive to improve flow and leveling while enhancing edge coverage.
In polyurethane systems, the reactivity of the secondary amine with isocyanate groups is moderate, allowing for controlled chain extension. This is particularly beneficial in moisture-cure urethane formulations where the silane can act as both a cross-linker and an adhesion promoter. However, care must be taken to exclude moisture during the compounding stage to prevent premature reaction of the ethoxy groups. The hydrolysis of the silane coupling agent generates ethanol, which can create voids in the cured polymer if not managed correctly.
For acrylic and nitrile rubber modifications, the silane improves tensile strength and tear resistance by reinforcing the filler-matrix interface. The cyclohexyl ring contributes to the thermal stability of the bond, ensuring that mechanical properties are retained at elevated service temperatures. Formulators should note that while the silane is compatible with a wide range of resins, it is not recommended for use in highly acidic environments where the amine group could be protonated, rendering the coupling mechanism ineffective.
Procurement Guidelines for Sourcing High Purity Cyclohexyl Amino Silanes
Procurement of high purity cyclohexyl amino silanes requires verification of the supply chain's capability to handle moisture-sensitive organosilanes. Packaging typically consists of 200-liter iron drums or IBC totes, lined to prevent contamination. It is imperative to confirm that the supplier utilizes nitrogen-blanketed storage and shipping protocols to minimize exposure to atmospheric humidity. Upon receipt, the material should be stored in a cool, dry, and well-ventilated area, away from sources of ignition and incompatible materials such as strong oxidizers or acids.
When requesting quotes, buyers should specify the required purity grade (e.g., 95% vs 99%) as this significantly impacts the distillation complexity and cost. Lead times should be evaluated based on the supplier's production cycle, as batch synthesis of specialty silanes may not be continuous. Ensure that the supplier can provide batch-specific documentation, including GC chromatograms and safety data sheets (SDS), prior to shipment. Consistency in supply is critical for manufacturing continuity, so establishing a long-term agreement with a manufacturer capable of scaling production is advisable.
Finally, verify the supplier's technical support capabilities. Complex formulations often require troubleshooting regarding hydrolysis rates or compatibility issues. A supplier with in-house application engineering can provide valuable data on optimal addition levels and processing conditions, reducing the time-to-market for new resin formulations.
To request a batch-specific COA, SDS, or secure a bulk pricing quote, please contact our technical sales team.