Polycup 1884 Polyamide-epichlorohydrin Hercules Crosslinking / Coupling / Curing Agents >> Amide Cellulosic Resins Vinyl Coatings >> Waterborne Polycup® 1884 Crosslinking Resin is a water-soluble, polyamide-epichlorohydrin crosslinking agent for carboxylated SBR latices, CMC, polyvinyl alcohol, and other water-soluble polymers. It also reacts with starch to impart water resistance. In latex-based adhesives, the addition of as little as 0.5% Polycup solids, based on latex solids, will increase green bond strength of the adhesive and improve its modulus, tensile strength, and dimensional stability. Water-based formulation Contains no formaldehyde Cures under neutral pH conditions Easy-to-handle liquid Use With Sodium Carboxymethylcellulose (CMC): Polycup resins can be used with CMC to develop water-insoluble films and coatings with good flexibility and strength. The addition of 5 to 10% Polycup solids to a CMC composition will make it essentially insoluble. However, the composition will remain somewhat water-sensitive, and it will swell to a slight degree in the presence of water. Use With Polyvinyl Alcohol (PVA): PVA alone does not produce a water-resistant coating. However, a high degree of water resistance can be imparted to PVA coatings and films by adding 5 to 10% Polycup resin solids to PVA solids. Use With Starch: Starch-based coatings and adhesives can be made water-resistant by adding Polycup resin to the starch either prior to cooking or afterwards, in amounts ranging from 2 to 20% resin solids, based on starch solids. Water-soluble, formaldehyde-free, polyamide-epichlorohydrin. Used as a crosslinking agent for starch-based coatings, in combination with PVA to produce a water-resistant coating, and in combination with CMC to develop water-insoluble films and coatings with good flexibility and strength. Provides water resistance. Cures under neutral pH conditions.