BUTOFAN NS 222
BUTOFAN NS 222
BUTOFAN® NS 222 is an aqueous dispersion of a styrene/butadiene copolymer containing carboxyl groups. It is used in the manufacture of laminating and pressure-sensitive adhesives.
General purpose adhesives requiring high specific adhesion to a variety of substrates. Manufacture of pressure-sensitive adhesives for self-adhesive products. This is often done in combination with tackifier resins.
Processing of BUTOFAN NS 222
BUTOFAN NS 222 exhibits good chemical and mechanical stability. Adhesives based on BUTOFAN NS 222 can be processed using standard latex compounding and applied by conventional coating methods such as Meyer bar, reverse roll, reverse gravure and slot die.
It is recommended that a preservative be added to adhesives containing BUTOFAN NS 222 to protect from microbial attack. Selection and suitability of such additives must be verified by trials.
As with other styrene/butadiene latex based adhesives, those based on BUTOFAN NS 222 can contribute to staining of pressure-sensitive paper labels articles after a period of time. In general, this effect can be reduced by priming of the substrate with suitable primers selected, verified and monitored by trials.
Properties
| Typical Properties | Value |
| Solids Content | ~ 51.0% |
| pH | ~ 8.8 |
| Viscosity (NAD-011) Brookfield RV, Spindle #2, at 20 rpm |
~ 150 – 450 mPas |
| Other Properties of the Dispersion | Value |
| Density | ca. 8.3 lbs/gal ca. 1.0 g/cm3 |
| Average Particle Size | ca. 0.16 μm |
| Bound Styrene | ca. 43.0% |
| Dispersion Type | Anionic |
| Antioxidant | Non-staining |
| Properties of the Film | Value |
| Density | ca. 0.98 g/cm |
| Glass Transition Temperature Tg (DSC) | ca. -26°C |
| Mechanical Strength* | Tensile Strength: 45 psi |
| Elongation at Break: 1800% | |
| Appearance | Clear |
| Surface | Tacky |
| Flexibility | High |
*These figures should be taken for comparison purposes only.
