Лако-красочные материалы — производство

Unlike addition crosslinking, condensation crosslinking of silicones takes place by release of the reaction products. Condensation silicones adhere well to a larger number of substrate surfaces, and the risk of the crosslinking reaction being inhibited is lower when they are used.

By splitting off the corresponding alcohol, branched silicones are generated using hydroxyl polysiloxane and an ester of silicic acid; organotin compounds are used as catalysts in this reaction. As the basic formulation is constant, the crosslinking rate is determined by temperature, pH value and catalyst concentration.