The Preferred epoxy resins are either diglycidyl ethers of bisphenol A, which can be produced by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular bodyweight is managed by changing the ratio of ECH to BPA; large ratios make lower molecular weights. Inside the realm of composites, epoxy resins are https://www.propanraya.com/kategori/cat-lantai