Larger molecular body weight diglycidyl ethers (n ≥ 1) are fashioned from the reaction with the bisphenol A diglycidyl ether fashioned with even further bisphenol A, this is known as prepolymerization: Hardeners which clearly show only minimal or confined reactivity at ambient temperature, but which respond with epoxy resins at https://www.propanraya.com/id/produk/epoxy-fast-dry