Products in Catalyst Ingredients: Disproportionation

Dragonox® 323 is an antioxidant with applications in rosin resins, such as penta rosin ester and glycerol rosin ester. Adding 0.2 ~ 0.3% of this product can greatly improve the color of rosin ester by 2 ~ 3 in Gardner measure, and 0.2% of this product will effectively improve the anti-crystallized character of rosin. It also functions as an effective catalyst in disproportionation and can be used as a substitute for platinum and palladium.

Dragonox® 901 is a bleaching agent and disproportionation catalyst for rosin esters and tall oil rosins. It functions as both the primary antioxidant and the secondary antioxidant, as it has the efficacies of both free radical termination and hydroperoxide decomposition. This product acts as a rosin disproportionation catalyst to transform the unsaturated conjugated double bonds of abietic type acid, which is susceptible to being oxidative, into dehydroabietic acid, which is stable.