The Most popular epoxy resins are both diglycidyl ethers of bisphenol A, which can be designed by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular pounds is managed by changing the ratio of ECH to BPA; high ratios produce lower molecular weights. Having said that, it's important to note https://www.propanraya.com/kategori/cat-lantai