Method for preparing Nano calcium carbonate dedicated to printing ink

A technology of nano-calcium carbonate and calcium carbonate, applied in the direction of ink, chemical instruments and methods, applications, etc., can solve the problems of small calcium carbonate particle size, affecting product dispersibility, transparency, etc., and achieve high drying and excellent ink absorption Effect

Inactive Publication Date: 2007-02-21
上海耀华纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, low-temperature carbonization (below 20°C) is mostly used for the preparation of calcium carbonate for inks. Saponified rosin coats

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] Carbonization: Add 1.5 cubic meters to a 2 cubic meter reactor with a concentration of 90g / L (with CaCO 3 Calcium hydroxide slurry, the carbonization start temperature is 20℃, 0.2kg sucrose and 0.3kg sodium citrate are added before carbonization, and the CO 2 The amount of 17-22% (volume concentration) of the kiln gas is carbonized until the pH value of the calcium carbonate slurry reaches 7, and then 0.4kg sodium polyacrylate and 0.2kg zinc chloride are added to obtain a uniformly dispersed nano-calcium carbonate slurry for use .

[0022] Coating: Dissolve 2.5kg of hydrogenated rosin and 2.5kg of dimerized rosin in 95°C hot water to make a coating solution, then add the coating agent to the nano-calcium carbonate slurry at 60°C, and coat at a constant temperature for 40 minutes. Continuous pressure filtration, drying, to obtain nano transparent ink calcium.

[0023] Finished product: average particle size is 20nm, particle size distribution is GSD 1.51, ...

Example Embodiment

[0024] Example 2

[0025] Carbonization: Add 1.5 cubic meters to a 2 cubic meter reactor with a concentration of 120g / L (with CaCO 3 Calcium hydroxide slurry, the carbonization start temperature is 15℃, and it contains CO 2 Carbonize the kiln gas with a volume of 17-22% (volume concentration), add 0.1kg sodium pyrophosphate and 0.2kg sodium ethylenediaminetetraacetate after 10 minutes, carbonize until the pH value of the calcium carbonate slurry reaches 7, and then add 0.5kg ten Sodium dialkyl sulfate and 0.3 kg magnesium sulfate were used to obtain uniformly dispersed nano calcium carbonate slurry for use.

[0026] Coating: Dissolve 2kg of rosin and 3kg of rosin-modified phenolic resin in 95°C hot water to make a coating solution, then add the coating agent to the nano-calcium carbonate slurry at 60°C, and coat at a constant temperature for 30 minutes, continuous Press filtering and drying to obtain calcium nanometer transparent ink.

[0027] Finished product: average particle si...

Example Embodiment

[0028] Example 3

[0029] Carbonization: Add 1.5 cubic meters to a 2 cubic meter reactor with a concentration of 105g / L (with CaCO 3 Calcium hydroxide slurry, the carbonization start temperature is 30℃, 0.5kg sucrose is added before carbonization, and the CO 2 Carry out carbonization with a volume of 17-22% (volume concentration) of kiln gas, add 0.3kg sodium hexametaphosphate when the carbonization rate reaches 85%, continue carbonization until the pH value of the calcium carbonate slurry reaches 7, and then add 0.2kg sodium polyacrylate , To obtain a uniformly dispersed nano calcium carbonate slurry for use.

[0030] Coating: Dissolve 5 kg of rosin soap in 95°C hot water to make a coating solution, then add the coating agent to the 60°C nano-calcium carbonate slurry, coat it at a constant temperature for 20 minutes, and continue to press and dry to obtain Nano transparent ink calcium.

[0031] Finished product: average particle size is 40nm, particle size distribution is GSD 1.5...

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Abstract

This invention discloses a method for preparing special nanoscale calcium carbonate for ink. The method comprises: calcining natural calcium carbonate, slaking, carbonzing, coating by a coating agent, vacuum-filtering and drying to obtain nanoscale calcium carbonate. The initial carbonization temperature is 15-40 deg.C, and crystal-morphology regulator and dispersant are added during carbonization. The coating agent is resinic acid and its derivatives. The obtained nanoscale calcium carbonate has such advantages as high dispersibility, good transparency, good luster, good ink absorbency and high dryness.

Description

technical field [0001] The invention relates to a preparation method of calcium carbonate, in particular to a preparation method of special nano-calcium carbonate for ink. Background technique [0002] The rapid development of the printing industry has led to the development of ink special calcium carbonate. According to the comprehensive information and statistical data of the Ink Branch of China Daily Chemical Industry Association, the total output of ink in the country in 2002 was 250,000 tons, accounting for 6% of the world's ink output, a year-on-year increase of 7.32% compared with the previous year, and sales revenue was 4.6 billion Yuan, a year-on-year increase of 6.98%. The total output of ink continues to rank fourth in the world, second only to the United States (1.16 million tons), Japan (500,000 tons) and Germany (450,000 tons). Among them, offset ink has the largest share, accounting for 40-45% of the total market. It is predicted that the demand for ink in ...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/00C09D11/02
Inventor 蔡琨曲晶易登峰颜培刚
Owner 上海耀华纳米科技有限公司
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