The Preferred epoxy resins are both diglycidyl ethers of bisphenol A, and that is designed by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular body weight is controlled by adjusting the ratio of ECH to BPA; large ratios deliver lessen molecular weights. Paul is a technological gross sales manager https://www.propanraya.com/kategori/cat-lantai