Cymel 1172 Tetramethylol glycoluril Cytec Crosslinking / Coupling / Curing Agents >> Amine Coatings >> Waterborne Coil Coating Water CYMEL 1172 crosslinking agent is a new tetramethylol glycoluril compound especially designed to be used for crosslinking aqueous, neutral or acidic hydroxyl or amide functional polymers. ADVANTAGES Stable under acidic conditions Low cure temperatures (200°F, 93°C) Insignificant pollution High efficiency Excellent chemical resistance Good overbake characteristics APPLICATION AREAS Acidic emulsions Coil coatings CYMEL 1172 crosslinking agent combines excellent stability at acidic pH as low as about 4 with excellent reactivity at a low temperature of about 200°F (93°C). The excellent stability of this methylol-reactive compound at an acid pH also manifests itself in low or no formaldehyde loss during the baking of coatings in which it is used. CYMEL 1172 crosslinking agent is non-polluting, since the volatile product evolved during the crosslinking reaction in systems at an acid pH is water. Little or no formaldehyde is evolved during curing, unless the reaction is carried out under alkaline conditions. The crosslinking reaction of CYMEL 1172 crosslinking agent can be accelerated with an acid catalyst, such as paratoluene sulfonic acid, normally used in coatings. CYMEL 1172 crosslinking agent cannot be used in amine-neutralized or basic coating systems because of the potential problems of demethylolation of the compound. Furthermore, the presence of the amine would reduce the cure response to such an extent that CYMEL 1172 crossinking agent would not offer advantages over other commercially available crosslinking agents. Based on the known durability of glycoluril-based crosslinking agents, the exterior durability of systems using CYMEL 1172 crosslinking agent can be expected to be equally as durable as melamine resin crossinked coatings. CYMEL 1172 crosslinking agent, a very polar and highly water-soluble compound, has limited compatibility with organic solvents. It is useful as a crosslinking agent for many acidic emulsions in end-use applications such as pre-finished wood paneling and plastic substrates for which fast, low-temperature cure response, in conjunction with excellent catalyzed stability, is desired. During cure, coatings containing CYMEL 1172 crosslinking agent release much less formaldehyde than formulations utilizing melamine-formaldehyde resins as crosslinkers. Tetramethylol glycoluril compound especially designed to be used for crosslinking aqueous, neutral or acidic hydroxyl or amide functional polymers. Stable under acidic conditions. Low cure temperatures (200°F, 93°C). Insignificant pollution. High efficiency. Excellent chemical resistance. Good overbake characteristics. Can be used for acidic emulsions, coil coatings. Combines excellent stability at acidic pH as low as about 4 with excellent reactivity at a low temperature of about 200°F (93°C). The excellent stability of this methylol-reactive compound at an acid pH also manifests itself in low or no formaldehyde loss during the baking of coatings in which it is used. Non-polluting, since the volatile product evolved during the crosslinking reaction in systems at an acid pH is water. Little or no formaldehyde is evolved during curing, unless the reaction is carried out under alkaline conditions. The crosslinking reaction of it can be accelerated with an acid catalyst, such as paratoluene sulfonic acid, normally used in coatings.Cannot be used in amine-neutralized or basic coating systems because of the potential problems of demethylolation of the compound. Based on the known durability of glycoluril-based crosslinking agents, the exterior durability of systems using it can be expected to be equally as durable as melamine resin crossinked coatings. Very polar and highly water-soluble compound, has limited compatibility with organic solvents. It is useful as a crosslinking agent for many acidic emulsions in end-use applications such as pre-finished wood paneling and plastic substrates for which fast, low-temperature cure response, in conjunction with excellent catalyzed stability, is desired. During cure, coatings containing it release much less formaldehyde than formulations utilizing melamine-formaldehyde resins as crosslinkers. Has good stability in aqueous systems which are neutral to slightly acidic in pH. Hydrolyzes very rapidly in systems that are high in pH.