Patent ID: 8722551
Filing Date: 2014-05-13
Classification: C08G,C09K,D06M,Y10T

Abstract:
1. A flame retardant composition comprising a phosphorous-containing polymer, the phosphorous-containing polymer being produced by: (a) reacting a reactant mixture in a condensation reaction to produce a precondensate compound, the reactant mixture comprising a phosphonium compound and a nitrogen-containing compound, wherein: wherein R wherein R (b) reacting the precondensate compound from (a) and a cross-linking composition in a condensation reaction to produce a phosphorous-containing intermediate polymer, the cross-linking composition comprising an alkylene urea compound selected from the group consisting of ethylene urea, propylene urea, and mixtures thereof; and (c) reacting the phosphorous-containing intermediate polymer from (b) with an oxidizing agent to produce the phosphorous-containing polymer, wherein the phosphorous-containing intermediate polymer is reacted with the oxidizing agent under conditions sufficient to convert at least a portion of the phosphorous atoms in the phosphorous-containing intermediate polymer to a pentavalent state.