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Functionalized nanoparticles

A nanoparticle and functionalization technology, applied in the field of functionalized nanoparticles, can solve problems such as unclear printing, colorant migration, bleeding, etc.

Inactive Publication Date: 2012-11-14
CIBA SPECIALTY CHEM HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The use of colorants in polymers or coatings often results in the migration of colorants, leading to undesired coloring phenomena, for example on adjacent substances
Bleeding often occurs in the application of inkjet printing, resulting in unclear printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0403] Example 1: Preparation of 3-Aminopropylsilane Modified Silica Nanoparticles

[0404] 510 g of Ludox TMA (Helm AG, 34% dispersion of nanosilica in water) were mixed with 2490 g of ethanol. To this homogeneous mixture was added dropwise 345 g of 3-aminopropyl-trimethoxysilane. After the addition, the mixture was heated to 50°C for 18 hours. Then by evaporating EtOH / H in a rotary evaporator 2 O, the volume of the mixture was reduced to about 1 L. A total of 4 liters of hexane was added, the mixture was shaken vigorously and the phases were separated in a separatory funnel to remove unreacted aminosilane. Concentrate the lower water / ethanol phase to a wet paste in a rotary evaporator under vacuum, then resuspend in 1 L of ethanol. A total of 1199 g of solution was obtained with a solids content of 27.3% by weight.

[0405] analyze:

[0406] Thermogravimetric analysis (TGA; heating rate: 10°C / min, from 50°C to 600°C): weight loss: 25.2%, corresponding to organic matt...

Embodiment 2

[0410] Example 2: "Electrostatic" Immobilization of Cationic Dye "Victoria Blue" on Modified Silica Nanoparticles

[0411] Reaction scheme:

[0412]

[0413] 20 g of the dispersion obtainable according to Example 1 (amine content: 26.2 mmol) were concentrated to a wet paste with a rotary evaporator and redispersed in 40 ml of dimethylacetamide (DMA) using an ultrasonic bath. Within 45 minutes, 2.62 g (26.2 mmol) of succinic anhydride dissolved in 15 ml of DMA was added with good stirring, whereby a white suspension formed. Then 2.20 g (26.2 mmol) of finely divided sodium bicarbonate were added and stirring was continued at ambient temperature for 20 hours. 12.13 g (23.6 mmol) Victoria Blue (Basic Blue UN 3143 from Dye Intermediate Co.) dissolved in 30 ml DMA was added and stirring was continued at ambient temperature for 8 hours. The reaction mixture was filtered and poured into 800 ml of toluene, whereby a blue solid formed and redispersed in 300 ml of ethanol. Dynami...

Embodiment 3

[0423] Example 3: Immobilization of Cationic Dye "Victoria Blue" on Modified Silica Nanoparticles by Chemical Reaction

[0424] Reaction flow:

[0425]

[0426] A solution of 22.25 g (43.2 mmol) of "Victoria Blue" (basic blue UN 3143 from Dye Intermediate Co.) and 8.75 g (86.5 mmol) of triethylamine in 900 g of DMA was cooled to 0° C. and dropped over 5 minutes A solution of 9.11 g (43.2 mmol) trimellitic anhydride chloride in 70 g DMA was added. The reaction mixture was stirred at 0°C for 20 minutes, warmed to room temperature and stirred at ambient temperature for an additional 16 hours. Concentrate 18 g of the modified nanoparticle dispersion (amine content: 86.5 mmol) obtained according to Example 1 to a wet paste with a rotary evaporator, then disperse in 100 ml of dimethylacetamide, add 17.66 g (173 mmol) of acetic anhydride And the mixture was stirred at 50°C for 24 hours. All solvent was evaporated in a rotary evaporator under vacuum, the residue was poured int...

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Abstract

The present invention discloses functionalized nanoparticles comprising on the surface a covalently bound radical of formula (1), wherein the nanoparticles are SiO2, Al2O3 or mixed SiO2 and Al2O3 nanoparticles, R1 and R2 are independently of each other hydrogen, nanoparticle surface-O-, or a substituent, n is 1, 2, 3, 4, 5, 6, 7 or 8, and Y is a radical of formula -B1-D1 (2a), wherein B1 is the direct bond or a bridge member, and D1 is a radical of a cationic dye, a radical of a phthalocyanine dye which carries no water-solubilizing group, or a radical selected from a fluorescent dye, or Y is a radical of formula -B2 D2 (2b), wherein B2 is an organic radical comprising at least one group having a negative charge, and D2 is a cationic dye selected from the group consisting of monoazo, disazo, polyazo, methine, azamethine, diphenylmethane, triphenylmethane, triaminotriaryl methane, azine, oxazine, cyanine and anthraquinone dyes.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of May 17, 2006, an application number of 200680018608.0, and an invention name of "Functionalized Nanoparticles". technical field [0002] The present invention relates to novel functionalized nanoparticles, compositions comprising organic materials, preferably synthetic polymers, and said novel functionalized nanoparticles, and their use as coloring materials for organics. Background technique [0003] The use of fillers in polymers has the advantage that it is possible to improve, for example, the mechanical properties of the polymer, especially density, hardness, stiffness or impact strength. [0004] Using very small filler particles (<400 nm), so-called nanoscale fillers, at much lower concentrations of 5-10% by weight, the mechanical properties, long-term stability or flame retardant properties of the polymer can be obtained The same effect can be achieved b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K9/04C08K3/36C08K3/22C09D7/12C09B67/02C09C3/12C09C3/08C09C1/28C09C1/40
CPCC09B68/20C09B69/103C09B67/0097C09B69/10C09B68/443B82Y40/00C08K3/34C08K5/00C09C3/12
Inventor M·米勒A·米尔巴克T·吉森伯格D·鲍尔T·鲁克F·里米L·费勒R·伦茨L·米肖
Owner CIBA SPECIALTY CHEM HLDG INC
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