Star- and three-shaped branched polymers having flame-retardant properties

Discoled are polymers with a complex branched structure (star- or three-shaped) obtainable by polymerizing a bifunctional type AB monomer and/or type AA+BB monomers in the presence of: (a) one or more polymanine and/or a polyacid and/or polyalc. and/or more generally a compound (such as POSS)having at least three functional groups such as amino, carboxylic acid or hydroxyl functions; (b) one or more phosphoroud containing molecules reacting with only one reactive group during the polymerization; (c) optionally one or more org. acid and/or an amine and/ or an Alcohol having one or two functional groups