The preferred epoxy resins are both diglycidyl ethers of bisphenol A, which can be made by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular pounds is controlled by modifying the ratio of ECH to BPA; significant ratios create lessen molecular weights. In the epoxy resin and amine reaction, the https://www.propanraya.com/kategori/cat-lantai