Patent ID: 8921439
Filing Date: 2014-12-30
Classification: C07F,C08K

Abstract:
1. A monohydroxy cyclic phosphonate of general formula (I): wherein R 1 is selected from the group consisting of an alkyl selected from methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, or tert-butyl; an alkenyl, an aryl; an alkaryl; an aralkyl or an alkoxy group each of up to 10 carbon atoms; a —CH 2 CH 2 OR 3 group; a —CH 2 CH 2 C(═O)R 3 group; or, a —CH 2 CH 2 C(═O)OR 3 group in which each R 3 independently is an alkyl, alkenyl, aryl, alkaryl, aralkyl or alkoxy group of up to 10 carbon atoms, and R 2 is selected from the group consisting of an alkyl selected from methyl, ethyl, propyl, isopropyl, n-butyl, iso-butyl, sec-butyl, tert-butyl; an aryl; an alkaryl; an aralkyl or an alkoxy group each of up to 10 carbon atoms; a —CH 2 CH 2 OR 3 group; a —CH 2 CH 2 C(═O)R 3 group; or, a —CH 2 CH 2 C(═O)OR 3 group, where R 3 is as defined; provided that when R 2 is any of ethyl, isopropyl, n-butyl or iso-butyl, R 1 is other than ethyl, and n is 1 to 8, monohydroxy cyclic phosphonate (I) being substantially free of polyhydroxy phosphonate and containing a phosphorus content of 8 weight percent or greater.