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. 20, 2026
Filed:
Oct. 26, 2022
Honshu Chemical Industry Co., Ltd., Tokyo, JP;
Daikin Industries, Ltd., Osaka, JP;
HONSHU CHEMICAL INDUSTRY CO., LTD., Tokyo, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
A method for producing a polyether nitrile includes allowing an aromatic dihydroxy compound composition (I) and a dihalobenzonitrile compound composition (II) to undergo a polycondensation reaction in the presence of a basic compound. In the method, the aromatic dihydroxy compound composition (I) includes an aromatic dihydroxy compound (I-a) and an aromatic monohydroxy compound (I-b), and contains (I-a) in an amount ranging from 99.0 to 99.995 mol % and (I-b) in an amount ranging from 1 to 0.005 mol % relative to a total amount of (I-a) and (I-b), and the dihalobenzonitrile compound composition (II) includes a dihalobenzonitrile compound (II-a) and a monohalobenzonitrile compound (II-b), and contains (II-a) in an amount ranging from 99.0 to 99.995 mol % and (II-b) in an amount ranging from 1 to 0.005 mol % relative to a total amount of (II-a) and (II-b).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile