What is the Maximum Percentage of Aluminum Hydroxide That Can Be Added to Unsaturated Resin?

Aluminum hydroxide is an inert, odorless filler powder that can significantly enhance the properties of unsaturated resins when used in casting products. It can be added in a ratio of nearly 200% of the resin’s weight; for instance, 200 grams of filler can be incorporated into 100 grams of unsaturated resin. This addition helps to minimize shrinkage and notably improve thermal stability, which results in heavier and more substantial cast products. However, increasing the filler content may lead to challenges such as increased difficulty in pouring and a decrease in surface finish quality.