| abstract |
The invention relates to a polyester flame retardant for use in synthetic resin formulations obtainable by reacting phosphorus-containing monomers with each other and / or optionally with ester-forming monomers, wherein the phosphorus-containing monomer is selected from the addition products of 9,10-dihydro-9-oxa-10-phosphaphenanthre -10-oxide (DOPO) and nuclear DOPO derivatives of unsaturated compounds from the group of mono- and polybasic carboxylic acids and their anhydrides, mono- and polyhydric alcohols and hydroxycarboxylic acids, characterized in that the phosphorus-containing polyester has reactive functional groups, the Carbon-carbon double bonds, carboxylic acid groups, phosphinic acid groups and hydroxy groups are selected. |