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Nano aluminum oxide with high dispersibility and high ink absorption, preparation method and application thereof

A nano-alumina, high-dispersion technology, applied in chemical instruments and methods, photosensitive material substrate/auxiliary layer, inorganic pigment treatment, etc. Problems such as poor aluminum dispersion performance, to achieve the effect of high dispersion index, high gloss, and small agglomeration

Active Publication Date: 2012-12-05
天津碧海蓝天水性高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some methods for nano-alumina products in the prior art, but the nano-alumina produced by the existing preparation methods all have the problem of poor dispersion performance in the aqueous phase, so nano-alumina is used as an inorganic ink-absorbing pigment Produced high-gloss photo paper coatings with poor dispersion index, gloss and ink absorption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The raw material ratio is as follows:

[0040] Sodium metaaluminate 120 parts

[0041] Nitric acid (40%) 60 parts

[0042] Sodium carbonate 0.6 parts

[0043] 400 parts of deionized water.

[0044] The preparation process is as follows: (1) Add nitric acid into deionized water, stir for 0.5h, heat up to 30°C, then add sodium metaaluminate dropwise to the above mixed solution, after the reaction is complete, continue to stir and keep warm for 7h; (2 ) Add sodium carbonate, stir for 0.5h, then transfer to the reaction kettle, heat to 130°C, continue to stir and keep warm for 12h; (3) Wash and spray dry the reactants in the reaction kettle to obtain nano-alumina Powder.

Embodiment 2

[0046] The raw material ratio is as follows:

[0047] Sodium metaaluminate 150 parts

[0048] Nitric acid (40%) 150 parts

[0049] Sodium carbonate 1.8 parts

[0050] 400 parts of deionized water.

[0051] The preparation process is as follows: (1) Add nitric acid into deionized water, stir for 0.5h, heat up to 60°C, then add sodium metaaluminate dropwise to the above mixture, after the reaction is complete, continue to stir and keep warm for 2h; (2 ) Add sodium carbonate, stir for 0.5h, then transfer to the reaction kettle, heat to 180°C, continue to stir and keep warm for 6h; (3) Wash and spray dry the reactants in the reaction kettle to obtain nano-alumina Powder.

Embodiment 3

[0053] The raw material ratio is as follows:

[0054] Sodium metaaluminate 200 parts

[0055] Nitric acid (40%) 300 parts

[0056] Sodium carbonate 10 parts

[0057] 700 parts of deionized water.

[0058] The preparation process is as follows: (1) Add nitric acid into deionized water, stir for 0.5h, heat up to 60°C, then add sodium metaaluminate dropwise to the above mixture, after the reaction is complete, continue to stir and keep warm for 2h; (2 ) Add sodium carbonate, stir for 0.5h, then transfer to the reaction kettle, heat to 250°C, continue to stir and keep warm for 3h; (3) wash and spray dry the reactants in the reaction kettle to obtain nano-alumina Powder.

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PUM

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Abstract

The invention relates to a nano aluminum oxide having high dispersibility and high ink absorption, a preparation method and application thereof. The nano aluminum oxide comprises the following components in portions by weight: 120-200 portions of inorganic aluminum salt, 60-300 portions of inorganic acid, 0.6-12 portions of small molecule inorganic additive and 400-700 portions of de-ionized water. The preparation method comprises the following steps: (1) adding the inorganic acid to the ionized water at the temperature of 30-90 DEG C, uniformly stirring, then adding the inorganic aluminum salt for reaction to obtain a mixed liquid with the PH value of 2-9, and stirring and maintaining the temperature for 0.5-7h; (2) adding the small molecule inorganic additive, then transferring to a reaction kettle, heating to 130-250 DEG C, and stirring and maintaining the temperature for 3-12h; and (3) cooling the reactants, washing, and carrying out spray drying to obtain the nano aluminum oxide powder. The nano aluminum oxide has the characteristics of high purity, small particle diameter, small conglobation and the like and has very high dispersibility in the water phase, and a high light photographic paper coating prepared from the nano aluminum oxide has higher dispersion index, gloss and ink absorption.

Description

technical field [0001] The invention belongs to the field of nano-alumina, in particular to a nano-alumina with high dispersion and high ink-absorbing performance, a preparation method and application thereof. Background technique [0002] With the advent of the era of personalized printing, the demand for color inkjet paper with high gloss properties is increasing. At present, the main inorganic pigments used in color inkjet printing media are silica and alumina, which are gradually replaced by alumina materials due to the low gloss of silica coatings, while alumina coatings have high gloss, No cracks, bright colors and other characteristics, has broad market prospects. [0003] The Chinese patent literature discloses a production method of alumina microspheres (publication number: CN 1631787A, published on June 29, 2005), in which pseudo-boehmite and nitric acid are reacted into a gel, formed by centrifugal spray drying, and then Made by roasting. The method can meet th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/06G03C1/79
Inventor 李春刚鹿秀山王广磊郑江东崔津津李昊董晓哿苏景丽
Owner 天津碧海蓝天水性高分子材料有限公司
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