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Abstract
Polycondensation of aliphatic and aromatic ketones with formaldehyde in the presence of sodium hydrogen sulphide affords the corresponding poly(keto-sulphide) resins. These resins have been characterized by elemental analyses, osmometry, conductometry, measurement of solution viscosity in DMF, IR spectra and thermal gravimetric analysis. Oxidation of poly(keto-sulphide) resins is also studied. Formation of the resin is explained. The results of preliminary tests for glass reinforcement of few produced poly(keto-sulphide) resins suggest that laminate sheets can be obtained.