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:
Jan. 24, 1978
Filed:
Sep. 03, 1976
Gail H Birum, Kirkwood, MO (US);
Monsanto Company, St. Louis, MO (US);
Abstract
The present invention relates to cyclic phosphorus compounds including cyclic hydrogen phosphonates and processes for the preparation thereof. The present invention relates to an improved process for the preparation of cyclic hydrogenphosphonates, which comprises the reaction of phosphorochloridites with formic acid in accordance with the general reaction set forth below: ##STR1## where R is an alkylene or haloalkylene group of a 1,2-glycol having from two to six carbon atoms, or a 1,3-glycol having from three to eight carbon atoms, and Z is Cl or Br. Ketone and sulfenyl derivatives are also a part of the present invention. The cyclic phosphorus compounds are useful as flame retardants with organic polymers, such a polyurethanes, polyesters and polyamides.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile