Dimer acid is formed by polymerization of unsaturated fatty acids with eighteen carbon atoms. Its main components are monoacid, dimer acid and trimer acid. Generally speaking, dimer acid is ordinary dimer acid, and most of the dimer acid produced in China is ordinary dimer acid. The monoacid content is 3%-10%, the dimer acid content is 60%-75%, and the trimer acid content is 10%-18%. Refined dimer acid is a product that has been rectified many times on the basis of ordinary dimer acid. Compared with ordinary dimer acid, it has the advantages of high dimer acid content, light color and stable quality. Wuxi Zhiyuan Chemicals Co., Ltd. specializes in the supply of refined dimer acid with a monoacid content of 0% to 1%, a dimer acid content of 95% to 98%, and a trimer acid content of 1% to 5%. Refined dimer acid has the characteristics of light color, high purity, uniform molecular weight distribution, etc. It is used to synthesize polyamide resin and can be used as a high-quality raw material for high-end inks, coatings, and hot melt adhesives. The ink synthesized by it has the advantages of high gloss, good adhesion, excellent alcohol dilution, low gelation, fast drying and low odor; the synthetic epoxy resin curing agent has good flexibility, adhesion and interference Flexibility, toughness, chemical resistance, temperature resistance and surface gloss; the synthetic polymer has excellent flexibility, airtightness, water resistance and adhesion strength. At the same time, high-purity dimer acid is used in petroleum exploration surfactants, corrosion inhibitors, lubricating oil, anti-rust oil and other fields with excellent performance, and it is an important chemical intermediate in the fine chemical industry. 1. Polyamide resin for synthetic ink 2. Polyamide resin for synthetic epoxy resin curing agent 3. Synthetic polyamide hot melt adhesive 4. Metal processing oil, semi-synthetic or fully synthetic cutting fluid