The Preferred epoxy resins are possibly diglycidyl ethers of bisphenol A, which is made by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular bodyweight is controlled by changing the ratio of ECH to BPA; high ratios make decreased molecular weights. A carbon filament-epoxy resin scenario was utilized to enable https://www.propanraya.com/kategori/cat-lantai