Sensitized production of sulfhydryl compounds using ultra violet

Details Sensitized production of sulfhydryl compounds using ultra violet Sensitized production of sulfhydryl compounds using ultra violet

1974-12-23

1976-11-16

Turer, Richard B.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415918, 204162R, 260 4237, 260 79, 260830S, B01J 110

Patent

active

039922740

ABSTRACT:
An improved process for production of sulfhydryl-terminated compounds by reaction of an allene compound and hydrogen sulfide is disclosed wherein the reaction is carried out in the presence of ultraviolet light of wavelength substantially above 2600 Angstroms and of an organic photosensitizing reagent to obtain a substantially colorless product of improved purity at an increased reaction rate. The invention also includes polymerization of the crude sulfhydryl-terminated product with an unsaturated compound to prepare sulfhydryl-terminated polythioethers which are useful as chemical intermediates and precursors of elastomeric sealants, such as architectural sealants.

REFERENCES:
patent: 2398481 (1946-04-01), Vaughan et al.
patent: 2411983 (1946-12-01), Vaughan et al.
patent: 2873239 (1959-02-01), Nummy et al.
patent: 3398200 (1968-08-01), Griesbaum et al.
patent: 3412001 (1968-11-01), Edwards
patent: 3488270 (1970-01-01), Griesbaum et al.

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