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:
Aug. 29, 1978
Filed:
Dec. 29, 1975
Eugene J Boros, South Charleston, WV (US);
Anthony J Papa, Saint Albans, WV (US);
Union Carbide Corporation, New York, NY (US);
Abstract
Novel polymethylol polyphosphonates are prepared by reacting a trisubstituted polyphosphite having at least one alkyl group and formaldehyde. The phosphite reactant may contain the requisite hydroxyl functionality [e.g. - heptakis (dipropylene glycol) triphosphite] or the hydroxyl functionality may be introduced by carrying out the reaction in the presence of a polyol, e.g. - glycerol, as a protic solvent. The resulting reaction product is a water-soluble liquid of relatively low viscosity and may be employed without any refining. The thus-formed polyphosphonates can be readily incorporated into either rigid urethane foam formulations to impart flame retardancy or phenolic resins to improve flexibility.