• DeFazio- acetone, methyl ethyl ketone, methanol, ethanol, isopropanol [1]
• Sparos P. Nemphos and Robert L. Walter - Cyclohexanone, methyl ethyl ketone, methanol, dimethylformamide[2].
• Harry Gilbert, Cuyahoga Falls- With an inert solvent or diluent such as benzene, toluene, trichlorobenzene
The copolymers which are prepared according to this invention are characterized by being soluble in dimethyl formamide, hot cyclohexanone, and in a mixture of dimethyl formamide and acetone. They are insoluble in acetone alone, alcohol, benzene and others. [3]
• Matteo Zanotti Russo and Ferruccio Berte - The polymerization solvent of this invention is ethyl formate. Ethyl formate has a low toxicity and naturally