| 摘要 |
Polymers of tetracyanoethylene are made by polymerizing it alone or in admixture with other monomers, preferably in presence of a polymerization catalyst. The polymerization may be effected in bulk, in organic solvent solution, e.g. benzene, or by the addition of aqueous ammonium or sodium hydroxide solutions. Other monomers mentioned are acrylonitrile, ethylene, isobutylene, propylene and styrene. Specified catalysts are a :a 1-azobis-(a :g -dimethylvaleronitrile) and di-(tertiarybutyl) peroxide. The polymers may be used for electrical insulation purposes.ALSO:The invention comprises tetracyanoethylene and the preparation thereof by reacting malononitrile with sulphur monochloride under anhydrous conditions and preferably in an inert liquid diluent. The molar ratio of sulphur monochloride to malononitrile is preferably within the range of 1:2 to 2:1, and the reaction is preferably conducted at temperatures of 50-125 DEG C. The crude tetracyanoethylene may be purified by sublimation to give a white crystalline product. |
