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
Applicant:
Inventors:
Bobby F Dannels, Grand Island, NY (US);
Emil J Geering, Grand Island, NY (US);
Assignee:
Hooker Chemicals & Plastics Corporation, Niagara Falls, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; B01J / ;
U.S. Cl.
CPC ...
20415922 ; 2041 / ; 20415918 ; 2041592 ; 2041 / ; 260 4237 ; 260 79 ; 2608 / ;
Abstract
An improved process is disclosed for production of sulfhydryl-terminated compounds by reaction of an allene and hydrogen sulfide initiated with ultraviolet light of wavelength above about 2600 Angstroms to obtain a colorless product of improved purity. The invention also includes the polymerization of an unsaturated hydrocarbon with the sulfhydryl-terminated product to prepare a sulfhydryl-terminated polythioether. These compounds are useful as chemical intermediates and precursors of elastomeric sealants, such as architectural sealants.