The most well-liked epoxy resins are both diglycidyl ethers of bisphenol A, that is created by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular body weight is controlled by modifying the ratio of ECH to BPA; significant ratios generate lower molecular weights. Paul can be a technological product sales https://www.propanraya.com/kategori/cat-lantai