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专利名称：METHOD FOR PRODUCING HEAT-RESISTANT LINEAR THERMOPLASTICAROMATIC POLYTHIOETHERS
发明人：RUDOLF GABLER,JOSEF STUDINKA申请号：US3547887D申请日：19680605公开号：US3547887A公开日：19701215
摘要：1,160,666. Polythioethers. INVENTA A.G. FUR FORSCHUNG UND
PATENTVERWERTUNG, ZURICH. 4 June, 1968 [9 June, 1967], No. 284/68. Heading C3R.Polythioethers containing units of formula where R and R1 are aromatic radicals, areobtained by reacting an alkali metal or alkaline earth metal salt of an aromatic dithiolwith an aromatic dihalogen compound having at least three carbon atoms between thehalogen atoms, the aromatic radical being free from electronattracting groups in o- or p-positions with respect to the halogen atoms, in a polar solvent at elevated temperature.In examples, polymers are obtained by heating potassium, lithium and sodium salts ofdiphenyl ether 4,41- dithiol with p-dibromo-benzene, p-dichlorobenzene and 4,41-dibromodiphenyl ether, in N-methylpyrrolidone. Other salts mentioned are those ofdiphenyl sulphide dithiol, diphenylmethane dithiol and 4,41-dimercaptodiphenyl, andother dihalogen compounds are 1,3- dibromo - benzene, 1,4 - dichloronaphthalene, 4 -chloro - 41 - bromodiphenyl, 4,41 - diiododiphenyl - methane and 4,41 - dichlorodiphenylsulphide. A catalyst, e.g. copper, copper oxides, copper salts, N-bromosuccinimide or N-bromo-phthalimide, may be present in the reaction.
申请人：INVENTA AG. FUR FORSCHUNG UND PATENTVERWERTUNG
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