Bigger molecular weight diglycidyl ethers (n ≥ one) are formed via the reaction of the bisphenol A diglycidyl ether shaped with even further bisphenol A, this is referred to as prepolymerization: An aromatic epoxy also encompasses a “ring” in just its chemical structure and it is an item of BPA https://www.propanraya.com/id/produk/epoxy-fast-dry