Profile: Sam Wing International Limited is engaged in the trading of polyalcohols, acids, hydroxy acids, allyl ethers, caprolactones, sulfonic monomer Amps® and anti-foam. We also specialize in trading of chemical raw materials. Our trimethylolpropane is used in powder polyesters and liquid polyesters. Neopentyl glycol is used in unsaturated polyesters, powder polyesters and liquid polyesters. Our butyl ethyl propanediol is an important raw material for coiled material coatings. Dimethylolpropionic and dimethylolbutanoic acids are raw materials for polyurethane dispersant. Dimethylolpropionic acid is a key raw material for anionic polyurethane dispersions for wood, leather, textile surface finishes and other industrial coatings.