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:
May. 10, 2022
Filed:
Feb. 01, 2019
The United States of America, As Represented BY the Secretary of the Navy, Arlington, VA (US);
Matthew C. Davis, Ridgecrest, CA (US);
The United States of America, as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A method for making a cyanate ester resin includes reacting an arylorganometallic agent with a phosphorous halide in a solvent forming methoxy functionalized triphenylphosphines with one to six meta-methoxy groups. The methoxy functionalized triphenylphosphines with one to six meta-methoxy groups are reacted with an oxidizing agent forming a methoxy functionalized triphenylphosphine oxide including one to six meta-methoxy groups. The methoxy functionalized triphenylphosphine oxide is reacted with a dealkylating agent forming a hydroxy substituted triphenylphosphineoxide including one to six meta-hydroxyl groups. The hydroxy substituted triphenylphosphineoxide is reacted with cyanating reagent and a base forming a substituted triphenylphosphine oxide including one to six meta-cyanate groups. The substituted triphenylphosphine oxide is polymerized forming the cyanate ester resin.