Field of application

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. Figure 1 summarizes a lab study in which several commercially available tackifer dispersions were blended with BUTOFAN NS 166 and tested for pressure sensitive performance.

Processing

BUTOFAN NS 166 exhibits good chemical and mechanical stability. Adhesives based on BUTOFAN NS 166 can be processed using standard latex compounding and applied by conventional coating methods such as Meyer bar, reverse roll, reverse gravure and slot die.

The addition of about 0.5% wetting agent (e.g. Lumiten® I-SC or Pluronic® L-92) can help if problems of poor substrate wettability arise. Commercial defoamers can be used (e.g. Drew Plus® L-108) up to approximately 0.2% on the adhesive.

It is recommended that a preservative be added to adhesives containing BUTOFAN NS 166 to protect from microbial attack. Selection and suitability of such additives must be verified by trials. Recommendations available.

As with other styrene/butadiene latex based adhesives, those based on BUTOFAN NS 166 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.