Patent ID: 9169360
Filing Date: 2015-10-27
Classification: C07F,C08G,C08K,C08L

Abstract:
1. A process for preparing the alkyl phosphinate polymer, comprising mixing a phosphinic acid or an alkali metal salt of phosphinic acid, a molecular weight modifier, and a polar solvent to form a mixture and adding the mixture to an adjustable reactor and heating a temperature of the mixture to 90 to 110° C., adding an alkyne to the adjustable reactor under a pressure of 3bar, continuously stirring a free radical initiator solution homogeneously and adding the free radical initiator solution to the mixture under a temperature of 90 to 110° C., continuing to add the alkyne until the alkyne reaches saturation, maintaining the temperature for 2˜4 hours and adjusting pressure to atmospheric pressure, cooling the mixture to 70-80° C. and adding a metallic compound or protonated nitrogen base to the mixture, while keeping temperature at 70-80° C. for 2-2.5 hours, and separating, washing and drying a solid in the mixture to obtain a product having a formula of wherein R R R x=1/m, m being the valence of R u is an integer in a range of 1 to 6, and wherein a ratio of weight of the polar solvent to total weight of the phosphinic acid or alkali metal salt of phosphinic acid and the molecular weight modifier is 4.0 to 6.0, a molar ratio of the molecular weight modifier to the phosphinic acid or alkali metal salt of phosphoric acid is 0.4 to 9.0; and wherein the free radical initiator is 0.5% to 13% weight percentage of the phosphinic acid or alkali metal salt of phosphinic acid; molar amount of the metallic compound or the protonated nitrogen base is a molar amount of the phosphinic acid or alkali metal salt of phosphoric acid divided by m, m being a valence of metal cation of the metallic compound or cation of the protonated nitrogen base; and the metallic compound is a compound of an alkali metal, alkaline earth metal, transition metal, poor metal, metalloid, or lanthanide element.