Polycup 172LX Polyamide-epichlorohydrin Hercules Crosslinking / Coupling / Curing Agents >> Amide Cellulosic Resins Vinyl Coatings >> Waterborne Polycup® 172LX Crosslinking Agent 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. Has significant advantage over other commercially available neutral-cure polyamide resins in that it contributes significantly less to the formation of chlorinated organic compounds in effluent streams and finished products Contains no formaldehyde Cures under neutral pH conditions Easy-to-handle liquid 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. Polycup® 172LX Low chlorinated organic residual version of Polycup 172 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. Low chlorinated organic residual, water-soluble, formaldehyde-free, polyamide-epichlorohydrin. Used as a crosslinking agent for starch-based coatings, in combination with CMC to develop water-insoluble films and coatings with good flexibility and strength, and in combination with PVA to formulate PVA coatings and films. Provides water resistance. Cures under neutral pH conditions.