HC Plastics News: Cross-linking agent UN-7038 is a polyisocyanate cross-linking agent that can react with amino and hydroxyl groups in polymers. In most cases, the best results can be obtained by reacting each mole of hydroxyl group with an equal mole of UN-7038. The general addition amount is 1-5%, and in some systems it can be added to 10-30%, and you can try it out according to your needs. The heat treatment temperature must be above 100°C, and the optimal temperature is 160°C. The cross-linking effect can usually be obtained in 20 to 30 minutes. Adding a certain amount of organotin catalyst can shorten the cross-linking time. The higher the temperature, the shorter the treatment time.
(Jiangxi New Materials Co., Ltd.)
Union Chemical launches new adhesion promoter UN-7038. UN-7038 is a water-dispersible blocked polyisocyanate that can be used as a cross-linking agent for one-component water-based coatings. Used in water-based coatings such as water-based acrylic and polyurethane as adhesion promoter and cross-linking agent. Improve the bonding strength, water resistance, abrasion resistance, scrub resistance, scratch resistance and chemical resistance of the coating. It can also be added to polymer systems, such as acrylate, polyester, epoxy resin and polyurethane resin, to enhance the chemical resistance and weather resistance of the coating.
At the same time, this product can be used in baking paint, coil steel paint, corrosion-resistant paint, etc.; it is especially suitable for coating in original automobile paint, which can improve flexibility, impact resistance and adhesion; it can also be used as an additive. Improve the mechanical properties and stone chip resistance of traditional baking coatings; it can be added to any resin emulsion with amino, carboxyl, and hydroxyl groups. After drying and heat treatment, the strength and friction resistance of the resin can be improved.
Editor in charge: Ye Dan
