n-Butyl 2-cyanoacrylate (stabilized)
CAS No.
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Molecular formula
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Chemical Product Description & Applications
n-Butyl cyanoacrylate is a reactive monomer used to formulate rapidly curing cyanoacrylate adhesives. Its electron-deficient double bond undergoes anionic polymerization initiated by trace moisture and basic species on suitable surfaces. This converts a liquid monomer into a bonded polymer film without the solvent-evaporation step required by conventional solvent-borne adhesives.
The selected material is stabilized industrial monomer for further formulation. The n-butyl ester gives a different polymer flexibility and cure profile from shorter-chain cyanoacrylates. Stabilizers, viscosity modifiers and other ingredients are used to establish storage behavior and application characteristics. The raw monomer is therefore a formulation feedstock, with its final bonding performance determined by the complete adhesive and the substrates being joined.
Typical Applications
- Instant-adhesive manufacture: Used as a reactive monomer in formulated cyanoacrylate adhesives for small-part assembly and precision bonding of compatible materials.
- Specialty adhesive blends: Used with suitable cyanoacrylate monomers or modifiers to adjust the balance of cure behavior, film flexibility and handling characteristics.
Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Appearance | Clear colorless liquid | Visual inspection |
| Identification | Consistent with authenticated reference | FTIR fingerprint comparison |
| Monomer assay | ≥98.0% w/w | Calibrated GC with validated stabilized sampling |
| Viscosity at 25 C | 2-10 mPa.s | Capillary viscometry with density conversion |
| Acidic inhibitor as SO2 | 10-100 mg/kg | Ion chromatography after controlled trapping |
| Polymer content | ≤1.0% w/w | Size-exclusion chromatography with calibrated response |
Specifications describe the standard grade. Tolerance, test method and documentation package are confirmed per order.
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