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HC Plastics News: Cross-linking agent UN-7038 is a polyisocyanate cross-linking agent that can react with amino and hydroxyl groups in the polymer. In most cases, every mole of hydroxyl groups reacts with equal moles of UN-7038 to get the best results. Generally, the dosage is 1-5%, and some systems can be added to 10-30%, according to the demand for trial. The heat treatment temperature must be above 100 ℃, the optimal temperature is 160 ℃, usually 20 to 30 minutes to obtain the cross-linking effect. Adding a certain amount of organotin catalyst can shorten the cross-linking time. The higher the temperature, the shorter the processing time.

Youn Chemical launched a new adhesion promoter UN-7038. UN-7038 is a water-dispersible closed polyisocyanate that can be used as a crosslinking agent for one-component waterborne coatings. Used in waterborne acrylic and polyurethane waterborne coatings, as an adhesion promoter and crosslinking agent. Improve the bonding strength, water resistance, wear 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, the product can be applied to baking paint, coiled steel paint and corrosion-resistant paint; especially suitable for coating in original car paint, which can improve flexibility, impact resistance and adhesion; can also be used as an additive to improve traditional baking Mechanical properties and stone impact resistance of baked coatings; can be added to any resin emulsion with amino, carboxyl, and hydroxyl groups. After drying and heat treatment, it can improve the strength and friction resistance of the resin.