CYMEL® 327

CYMEL® 327 resin may not require the addition of an acid catalyst to the formulation to obtain effective cure. In many instances, the acidity of the backbone polymer in the formulation is sufficient to catalyze the reaction under normal baking conditions (15-20 minutes at 120-150°C). If catalyst addition is required, then 0.5-1.0% of CYCAT®® 296-9 catalyst based on total resin solids is recommended

The stability of solvent-borne systems containing CYMEL® 327 resin can be enhanced by the addition of primary alcohols, amines, or a combination of these. Low molecular weight primary alcohols such as ethanol or n-butanol are most effective. Recommended amines are tertiary types, such as triethylamine or dimethylethanolamine, at a concentration of 0.5-1.0% on total binder solids. For best stability in waterborne systems, a pH of 7.5-8.5 should be maintained using tertiary amines only.

CYMEL® 327 resin has a shelf life of 720 days from the date of manufacture when stored at temperatures below 32°C. Although low temperatures are not detrimental to stability, its viscosity will increase, possibly making the resin difficult to pump or pour. The viscosity will reduce again on warming, but care should be taken to avoid excessive local heat as this can cause an irreversible increase in viscosity.