Functionalized nanoparticles
AssigneeBASF SE
InventorsMARTIN MÜLLER, DIDIER BAUER, THOMAS RUCH, LEONHARD FEILER, WOLFGANG SCHLENKER, CHRISTIAN CREMER
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Abstract
Functionalized nanoparticles, which are obtainable by combining in a first step a functionalized dyestuff, a silicon-based spacer and a catalyst, and in a second step reacting the product obtained in the first step with a co-reactive organic silicon, aluminum, zirconium or titanium compound. Optionally, the thus obtained functionalized nanoparticles can be combined or encapsulated with a polymer. The functionalized nanoparticles are useful as colorants and fluorescents in plastics, paints, inks, electronic materials, cosmetic articles, and the like.
Claims9
Functionalized nanoparticles obtained by
- a) combining a functionalized dyestuff of the formula (1a)
- wherein
- R1 stands for C1-C18alkoxy or —OH;
- R2, R3 independently from each other stand for C1-C18alkoxy, C1-C18alkyl or —OH,
- E stands for a direct bond or a bridging member,
- D is the residue of a chromophore,
- and a spacer of the formula (1b)
- R4(4−m)SiXm (1b)
- wherein each
- R4 represents a monovalent organic radical of from 1 to 24 carbon atoms, optionally substituted by a monovalent organic radical,
- X represents a group capable of undergoing hydrolysis and
- m is 0, 1, 2, 3 or 4;
- a catalyst,
- and optionally a solvent, at time TSB,
- and treating the obtained mixture until time TSE, wherein (TSE−TSB) is chosen in the range of from 1 and 48 hours, at a temperature in the range of from 0 to 80° C.,
- b) adding a co-reactive compound (1c) selected from the group consisting of an organic silane, an organic alumina, an organic zirconia and an organic titania, at time TCC, wherein TCC fulfils either condition (a) TSB<TCC<TSE, condition (b) TCC≧TSE or condition (c) wherein TCC fulfils both (a) and (b) in case part of co-reactive compound (1c) is added before TSE, and the other part after TSE,
- and treating the obtained respective reaction mixture for a period of time between 12 and 36 hours at a temperature between 0 and 80° C., and, optionally, after isolating the thus obtained nanoparticles with well-known methods,
- c) combining the nanoparticles with a polymer or,
- d) polymerizing a monomer or monomer mixture in the presence of the nanoparticles.
Process for the manufacture of functionalized nanoparticles comprising the steps of:
- a) combining a functionalized dyestuff of the formula (1a)
- wherein
- R1 stands for C1-C18alkoxy or —OH;
- R2, R3 independently from each other stand for C1-C18alkoxy, C1-C18alkyl or —OH,
- E stands for a direct bond or a bridging member,
- D is the residue of a chromophore,
- and a spacer of the formula (1b)
- R4(4−m)SiXm (1b)
- wherein each
- R4 represents a monovalent organic radical of from 1 to 24 carbon atoms, optionally substituted by a monovalent organic radical,
- X represents a group capable of undergoing hydrolysis and
- m is 0, 1, 2, 3 or 4;
- a catalyst,
- and optionally a solvent, at time TSB,
- and treating the obtained mixture until time TSE, wherein (TSE−TSB) is chosen in the range of from 1 and 48 hours, at a temperature in the range of from 0 to 80° C.,
- b) adding a co-reactive compound (1c) selected from the group consisting of an organic silane, an organic alumina, an organic zirconia and an organic titania, at time TCC, wherein TCC fulfils either condition (a) TSB<TCC<TSE, condition (b) TCC≧TSE or condition (c) wherein TCC fulfils both (a) and (b) in case part of co-reactive compound (1c) is added before TSE, and the other part after TSE,
- and treating the obtained respective reaction mixture for a period of time between 12 and 36 hours at a temperature between 0 and 80° C.,
- and, optionally, after isolating the thus obtained nanoparticles with well-known methods,
- c) combining the nanoparticles with a polymer or,
- d) polymerizing a monomer or monomer mixture in the presence of the nanoparticles.
Dependencies are inferred from the claim text.