Patent ID: 8183315

Claim:
Polymer composition comprising: a) 10-99.99% by weight of at least one polyolefin, b) up to 50% by weight of a thermoplastic that is not a polyolefin, c) 0.005-1% by weight of per se known polymer additives, d) a fat-soluble iron compound prepared by allowing an iron salt to react with an acidic, organic compound in a process in which a suitable oxidation means ensures that all iron in the final product is present in its highest stable oxidation state at standard conditions; and (e) at least one polybranched organic/inorganic hybrid polymer comprising an inorganic core carrying organic branches that constitute a particle structure characterized in that the particulate polybranched organic/inorganic hybrid polymer is prepared by a sol-gel process, said sol-gel process comprising at least the following steps in chronological sequence; A) the core is made by controlled hydrolysis and condensation of a silane of the structure: X—B—Si(—Y) 3 where X═NR1R2, wherein R1, and R2 are chosen among hydrogen, saturated or unsaturated C1-C18 alkyl, substituted or non-substituted aryl, in which the carbon chains of said compounds optionally include one or more of the elements oxygen, nitrogen, sulphur, phosphorous, silicon, and boron and/or optionally containing one or more hydrolysable silane units, or where R1, and R2 are chosen from condensation products or addition products of one or more type of chemical compounds such as acids, alcohols, phenols, amines, aldehydes or epoxides, B is a linkage group chosen among saturated and unsaturated C1-C18 alkylene, substituted or unsubstituted arylene in which the carbon chains of said compounds optionally include one or more branches and/or one or more of the elements oxygen, nitrogen, sulphur, phosphorous, silicon, and boron, Y is chosen among hydrolysable residues such as alkoxy, carboxyl, halogen, B) the organic branches are developed by i) when at least one of R1, and R2 is H, adding at least one reactant that causes N—H hydrogen atoms of the X—B group of the core to be substituted through reactions typical for primary and secondary amines, and/or ii) adding an acid that causes an addition to the N atoms of the X—B group of the core so that the N atoms are wholly or partially converted to quaternary nitronium ions.