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:
Apr. 28, 1992
Filed:
Jun. 12, 1989
Applicant:
Inventors:
Norio Ogata, Chiba, JP;
Minoru Senga, Chiba, JP;
Assignee:
Idemitsu Petrochemical Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528388 ; 528 86 ; 528271 ; 528364 ;
Abstract
Polyarylene sulfides are produced by polymerizing a dihalogen aromatic compound with an alkali metal hydrosulfide in the presence of a lithium halide in an organic polar solvent. In this polymerization, an alkali metal hydroxide and/or carbonate is added and a branching agent such as a trihalogen aromatic compound or a halogen aromatic nitro compound is used, if desired. The polyarylene sulfides have a high molecular weight and a less salt contents and a high degree of whiteness.
Ogata, Norio. (1992). Process for the production of polyarylene sulfides with lithium halide (U.S. Patent No. 5109110). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5109110
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile