Patent 7119220 was granted and assigned to Bayer on October, 2006 by the United States Patent and Trademark Office.
Process for preparing dimethyl propanephosphonate, characterized in that dimethyl phosphite is reacted with propene in the presence of a free-radical former at a reaction temperature of 60 to 95° C., the half life of the free-radical former being 0.1 to 20 min at the reaction temperature.