| 摘要 |
Polybranched organic/inorganic hybrid polymer and method for its manufacture. The hybrid polymer has the form of an inorganic core carrying organic branches. The core is first prepared by controlled hydrolysis and condensation of a silane with a structure: X—B—Si(—Y)3 in which X═NP1R2, while R1, R2 are chosen among hydrogen, alkyl and aryl, or R1, R2 are chosen among condensation products, addition products of one or more type of chemical substances such as acids, alcohols, phenols, amines, aldehydes or epoxides. B is a linkage group chosen among alkylene and arylene which may include oxygen, nitrogen, sulphur, phosphorous, silicon and boron. Y is chosen among hydrolyzable residues such as alkoxy, carboxyl, and halogen. The organic branches are developed by substituting N—H hydrogen atoms in the X—B group by reactions that are typical for primary and secondary amines, and/or by adding an acid that causes an addition to the N atoms of the X—B group in the core. Specific uses of the hybrid polymers are also indicated. |
| 主权项 |
1. Method for the preparation of particulate, polybranched organic/inorganic hybrid polymer by a sol-gel process, said hybrid polymer having form of an inorganic core carrying organic branches, characterized in that the method comprises at least the following two steps in chronological sequence:
A) the core is prepared by controlled hydrolysis and condensation of a silane with a structure:
X—B—Si(—Y)3 in which X═NR1R2, wherein R1, R2 are 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 optionally may include one or more hydrolyzable silane units, or R1, R2 are 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 in which the carbon chains of said substances optionally may include one or more branching and optionally 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, B) the organic branches are developed by:
i) wherein at least one of R1, R2 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 atoms by an A=B double bond while A, B are chosen among the elements C, O, N, S or P, and optionallyii) 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. |
