N-Methylpyrrolidone (NMP)

I. Chemical and New Materials Sector

1. Polymer Material Synthesis and Processing

   • Used as a solvent for engineering plastics such as polyamide, polyimide, and polyphenylene sulfide, serving as a medium for polymerization reactions or as a solvent for spinning solutions (e.g., in the spinning processes of aramid fibers and carbon fibers). It effectively dissolves high molecular polymers and controls reaction conditions.
   • Employed in the production of polyurethane elastomers and adhesives as a solvent to adjust system viscosity and enhance product uniformity.

2. Coating and Ink Industry

   • Used as a high-boiling-point solvent in high-end coatings (e.g., automotive coatings, anti-corrosion coatings) and inks (e.g., electronic circuit board inks, screen printing inks) to improve film formation, leveling, coating adhesion, and glossiness.
   • Due to its strong solubility for pigments and resins and moderate evaporation rate, it is suitable for processes requiring high-temperature drying or thick coating applications.

II. Electronics and Semiconductor Industry

1. Cleaning and Stripping

   • Used for cleaning electronic components (e.g., circuit boards, chips) to remove impurities such as photoresist, flux residues, and oil stains. Particularly suitable for high-purity cleaning of precision electronic devices due to its strong solubility and non-corrosive nature to substrates.
   • In the production of flexible printed circuits (FPC) and display panels (e.g., LCD, OLED), it serves as a stripping agent to remove temporarily bonded adhesive layers or protective films.

2. Battery Manufacturing

   • Used as a dispersant and solvent for electrode materials in lithium-ion batteries (e.g., cathode materials like LiCoO₂, anode materials like graphite) to prepare electrode slurries. It facilitates uniform mixing of active materials, conductive agents, and binders, thereby enhancing battery performance.

III. Petroleum and Chemical Separation

1. Extraction and Purification
   • In petrochemical applications, it is used for aromatic extraction (due to its high selectivity for aromatics, offering superior separation efficiency compared to traditional solvents).
   • Employed in desulfurization processes (removing hydrogen sulfide, mercaptans, etc.) from natural gas and syngas, as well as in waste oil regeneration to remove impurities and improve oil purity.