The preferred epoxy resins are either diglycidyl ethers of bisphenol A, which is designed by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular excess weight is managed by adjusting the ratio of ECH to BPA; substantial ratios make lower molecular weights. Having said that, it's important to note that https://www.propanraya.com/kategori/cat-lantai