Method for the manufacture of polybranched organic/inorganic hybrid polymers

Method for preparation of particulate polybranched organic/inorganic hybrid polymer said hybrid polymer having form of an inorganic core carrying organic branches by modifying the result of a sol-gel process based on at least partially hydrolysed, organic amino-functional silanes prepared by controlled hydrolysis and condensation of a silane with a structure:

• X—B—Si(—Y)3
• in which X═NR1H, wherein R1, is chosen among hydrogen, saturated or unsaturated C1-C18-alkyl, substituted or not substituted aryl, wherein the carbon chains of said silane optionally can include one or more of the elements oxygen, nitrogen, sulphur, phosphorus, silicon and boron, and/or optionally may include one or more hydrolyzable silane units, or R1 is chosen among condensation products, addition products of one or more type of chemical substances selected from the group consisting of acids, alcohols, phenols, amines, aldehydes or epoxides, B is a linkage group chosen among saturated and unsaturated C1-C18-alkylene, substituted or non-substituted arylene while the carbon chains of said substances optionally may include one or more branching and/or one or more of the elements oxygen, nitrogen, sulphur, phosphorous, silicon and boron, Y is chosen among hydrolyzable residues selected from the group consisting of alkoxy, carboxyl, and halogen while N—H hydrogen atoms in the hybrid polymer subsequent of hydrolysis and condensation are substituted by organic residues, characterized in that the organic branches are made by:
• i) wherein at least one of R1 is H, adding at least one reactant that is capable of causing N—H hydrogen atoms on the X—B-group in the core to be substituted by addition reaction of a compound with a reactive double bond, wherein the addition reaction involves substitution of N—H hydrogen atom by an A=B double bond while A and B are chosen among the elements C, O, N, S or P and optionally
• ii) adding an acid that is capable of causing an addition to the N atoms of the X—B group of the core, so that the N atoms totally or partially are converted to quaternary nitronium ions.