The preferred epoxy resins are possibly diglycidyl ethers of bisphenol A, that's made by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular weight is controlled by adjusting the ratio of ECH to BPA; higher ratios create decreased molecular weights. In the epoxy resin and amine response, the amine molecules https://www.propanraya.com/kategori/cat-lantai