Better molecular excess weight diglycidyl ethers (n ≥ 1) are formed because of the reaction on the bisphenol A diglycidyl ether formed with additional bisphenol A, this is known as prepolymerization: Hardeners which exhibit only very low or constrained reactivity at ambient temperature, but which respond with epoxy resins at https://www.propanraya.com/id/produk/epoxy-fast-dry