The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 1977
Filed:
Oct. 04, 1976
Bobby F Dannels, Grand Island, NY (US);
Hooker Chemicals & Plastics Corporation, Niagara Falls, NY (US);
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.