N-Methylpyrrolidone (NMP) is a highly polar aprotic solvent with high boiling point, strong polarity, low viscosity, strong solubility, no corrosion, low toxicity, good chemical and thermal stability, and complete miscibility with water Etc nmp solvent. Mainly used in coatings, lithium batteries, plastics, chemicals, pesticides, cleaning and degreasing, polymer solvents and polymerization solvents.
With the rapid development of high-strength engineering plastics and high-strength fibers such as polyamide, polyimide, and polyLRB-p-phenylene sulfide, higher requirements are placed on the quality and demand of n-methylpyrrolidin-2-one .
So, what are the specific downstream application fields of NMP?
Lithium Ion Battery
Lithium-ion battery is currently the most ideal secondary battery in my country, and is widely used in the design field of portable electronic technology products, such as notebook computers, mobile phones and digital cameras nmp. With the rapid economic development of China's new energy enterprise industry, lithium-ion batteries have gradually become the main learning power batteries for electric tools, electric bicycle systems and electric vehicles. In addition, lithium-ion batteries also have some important data applications in the field of energy storage.
As one of the main raw materials of lithium-ion batteries, NMP directly affects the quality and environmental protection requirements of lithium-ion battery coatings 1 methyl 2 pyrrolidone. According to industry research data, although due to different models and specifications, the proportion of lithium-ion batteries to manufacturing costs varies, but in general, lithium-ion batteries account for about 3% to 6% of manufacturing costs, and the market size and demand also vary. Growth and growth, especially lithium-ion batteries for energy storage and power batteries.
NMP is used to dissolve polyvinylidene fluoride and dilute slurry in lithium battery production. Low water content is required, and the content is generally above 99.9%.
Polymer Materials
NMP is an important solvent for chemical reaction and dilution in the production of polymer materials such as PPS, aramid, poly LRB-p-phenylene sulfide and polyimide, which directly affects the smooth completion of low-temperature polycondensation reaction and material product transportation.
Soluble in polymers such as cellulose derivatives, polyamides, polyimide resins, polyesters, polystyrene, polyacrylonitrile, polyvinyl chloride, polyvinylpyrrolidone, polyurethane, polycarbonate, polyether and many copolymers things.
NMP is mixed with the corresponding monomers, conventionally carried out in organic solvents and in water. Therefore, it is possible to find the best solvent formulation for a specific technical application of one's own company.
For example, NMP is widely used in the prefabrication of semipermeable membranes. Such membranes are used in separation processes such as ultrafiltration and reverse osmosis. On-site water purification like hemodialysis could find such an application.
In addition, products such as linear polymer fibers, films, tapes, etc. also bring some technical problems. The difficulty lies in the defect that the solution or plastic product can only remain corrosion-resistant, harmless, and non-flammable at normal operating temperatures. NMP is very practical as it is suitable for highly concentrated mixed solutions or for the manufacture of plastic compounds from polyamide, polyacrylonitrile, polyvinyl chloride, polystyrene and cellulose triacetate. It can also be applied to vinyl fluoride homopolymers and heteropolymers at high temperatures.
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NMR also has important applications in the electronics industry, such as integrated circuits, hard disks, and other industries that require strict control of metal ions and particles, such as degreasing, degreasing, dewaxing, polishing, rusting, paint, etc. NMR is also used to clean precision instruments in the integrated circuit semiconductor industry, liquid crystal displays, printed circuit boards, and hard printed circuit boards.
surface coating
NMP is a non-corrosive high boiler with excellent solvent properties, chemical and thermal resistance. Therefore, NMP improves the performance of many surface coating systems. In particular these effects favor vulcanization of dry coatings at relatively high temperatures. NMP is suitable for the production of highly filled paints because it improves the rheological properties, allowing the paint to improve flow and covering power, thus making the paint more uniform, non-porous, crack-free, exhibiting greater resistance and higher mechanical strength.
NMP is an excellent solvent for most of the main raw materials of Chinese coatings, such as acrylics, epoxies, polyurethanes, PVC production systems, polyamides based on enamel filaments, water-based as well as coatings and printed electronic inks.
NMP is also a useful solvent for butadiene-acrylonitrile polymer (NBR) as a vessel liner. The flow and leveling properties of the rubber compound are superior to those containing ketones.
Vinyl chloride-vinyl acetate copolymer is soluble in the mixed solution of NMP and single-ring aromatic hydrocarbon, and can be used for film injection molding. Under the action of the two solvents, the mixed solution has low viscosity and can be used at any time. Polyisocyanates containing imide groups are soluble in solvents in NMP systems. These solutions can be used for rubber compounds on metal surfaces.
wire material
In the manufacture of thermosetting insulating coatings, an important feature of NMP is the good solubility of polycarboxylic acids and their anhydrides (such as trimethylbenzene, phthalic anhydride, amide polymers and carboxyl groups with high aromatic content).
Therefore, polyisocyanate containing amide groups forms a condensation reaction of NMP mixed solution composed of polycarboxylic anhydride and monomeric polyisocyanate. Copper conductors with dry oil flow coating have excellent mechanical and dielectric properties. From a technical point of view, NMP has advantages in the operation of two functions: as a reaction medium in the manufacturing process, while the coating of the latter is used as a viscosity regulator.
NMP is also a suitable solvent for the reaction of copolyester synthetic resin in the reaction of imide and polyol. Therefore, the solvent system formed by the enterprise can be dried to form a highly heat-resistant enamel wire. At the same time, NMP is also used to manage as a solvent for drying oils of polyamides/polyimides derived from condensed tricarboxylic aromatic and aliphatic diamines.
chemical production of pharmaceuticals
NMP has been widely used in large-scale recovery of hydrocarbon solvent purification.
This technique takes advantage of the high solubility of hydrocarbons in NMP, but differs in that the presence of NMP tends to significantly increase volatility. Compared with other chemical solvent extractions, NMP has the following advantages. Without forming an azeotrope with hydrocarbons, NMP is very stable on heating.
NMP is easily mixed with water in any proportion. This allows the process to be adjusted as needed, and the dissolved hydrocarbons are dissolved to form the solvent. NMP has a correspondingly high boiling point at low pressure and maintains minimal loss values during separations on an industrial scale. At a viscosity that actually represents a lower temperature, it is more conducive to the exchange of substances.
Its application examples in the petrochemical industry are as follows: NMP can be used to remove and purify acetylene in incomplete combustion gases in saturated hydrocarbons.
Agrochemicals
NMP can be used as a solvent or co-solvent for the formulation of pesticides, fungicides, herbicides, and seed control technology products in my country, and is very important in highly polar organic compounds. Useful in multi-component system design.
Related Hot Topic
What aqueous solutions dissolve PVC?
[ABS, PVC, HIPS] => Acetone and Methyl Ethyl Ketone [MEK aka 2-Butanone] will dissolve ABS and PVC, and as the solvents dry, they will chemically reconstruct the joint in a less organized way.