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N-Methyl-2-pyrrolidone (NMP) is an organic compound consisting of a 5-membered lactam. It is a colorless liquid, although impure samples can appear yellow. It is miscible with water and with most common organic solvents. It also belongs to the class of dipolar aprotic solvents such as dimethylformamide and dimethyl sulfoxide.
Once the desired conversion is reached, excess solvent must be removed to obtain the pure polymer. Accordingly, solution polymerization is primarily used in applications where the presence of a solvent is desired anyway, as is the case for varnish and adhesives.
The product used mainly for coatings is sold in a powdered form and is roughly 50% imidized. One of the major uses is as a magnet wire enamel. The magnet wire enamel is made by dissolving the PAI powder in a strong, aprotic solvent such as N-methyl pyrrolidone.
68-12-2 C 2 H 8 N 2: 1,1-dimethylhydrazine: 57-14-7 ... N-Methyl-2-pyrrolidone: 872-50-4 CH 3 CH 2 CH 2 OH: ... Solvent miscibility table
Gamma-Butyrolactone is used as a chemical solvent and a cleaning agent, [15] for example in paint stripping or for cleaning graffiti. [16] Butyrolactone is a precursor to other chemicals. Reaction with methylamine gives NMP, and with ammonia gives pyrrolidone. It is also used as a solvent in lotions and some polymers. [5]
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Other alternatives to HMPA include the N,N′-tetraalkylureas DMPU (dimethylpropyleneurea) [10] [11] or DMI (1,3-dimethyl-2-imidazolidinone). [12] Tripyrrolidinophosphoric acid triamide (TPPA) has been reported to be a good substitute reagent for HMPA in reductions with samarium diiodide [ 13 ] and as a Lewis base additive to many reactions ...
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