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US 4,451,640 AGranted
Process for producing aromatic sulfide polymer
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsZenya Shiiki, Yukichika Kawakami
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Abstract
Disclosed herein is a process for producing an aromatic sulfide polymer, comprising the step of reacting elementary sulfur, a polyhalogen-substituted aromatic compound, an aldehyde or a condensate thereof and a caustic alkali in an organic solvent.
Claims6
A process for producing an aromatic sulfide polymer, comprising the step of
- reacting one gram-equivalent of elementary sulfur, 0.7 to 1.3 gram-equivalents of a polyhalogen-substituted aromatic compound, 0.6 to 1.4 gram-equivalents of an aldehyde or a condensate thereof and 1.2 to 2.5 gram-equivalents of a caustic alkali in 0.02 to 5 liters of an organic solvent at a temperature of 100.degree. to 300.degree. C.
Dependencies are inferred from the claim text.