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Zinc borate, and production and use thereof

A technology represented by zinc borate, applied in the field of new zinc borate, can solve problems such as poor insulation, deterioration of electrical properties, and dielectric breakdown

Inactive Publication Date: 2002-08-14
MIZUSAWA INDAL CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When plastic molded articles are used in electrical and electronic parts and are blended with such zinc borates for the purpose of imparting them with flame retardancy, electrical properties may deteriorate, such as poor insulation after being affected by moisture for a long period of time and dielectric breakdown

Method used

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  • Zinc borate, and production and use thereof
  • Zinc borate, and production and use thereof
  • Zinc borate, and production and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0189] By adding 72.5 grams of boric acid (B 2 o 3 content of 56.3%) was dissolved in 1000 ml of pure water to prepare an aqueous solution. Add 96.0 grams of zinc white (ZnO content is 99.4%) and 217.5 grams of boric acid (B 2 o 3 content is 56.3%), stir and mix together to make B 2 o 3 The molar ratio of / ZnO was 2.0. Then, the solution was stirred and reacted at 60° C. for 90 minutes. The solution was further stirred and reacted at 90°C for 4 hours. The resulting product was filtered, washed with water, and then dried at 105°C to obtain zinc borate (sample A-1). Table 3 shows the chemical composition and properties of the thus obtained zinc borate (sample A-1), figure 1 shows its X-ray diffraction pattern, figure 2 with image 3 is its scanning electron microscope image.

Embodiment 2

[0191] By adding 72.5 grams of boric acid (B 2 o 3 Content is 56.3%) is dissolved in 1000 milliliters of pure waters to prepare the aqueous solution, has added 1.25 grams of zinc borates (2ZnO 3B 2 o 3 3.5H 2 O) as future seeds. Add 95.7 grams of zinc white (ZnO content is 99.4%) and 217.5 grams of boric acid (B 2 o 3 content is 56.3%), stir and mix together to make B 2 o 3 The molar ratio of / ZnO was 2.0. Then, the solution was stirred and reacted at 60° C. for 90 minutes. The solution was further stirred and reacted at 90°C for 4 hours. The resulting product was filtered, washed with water and then dried at 105°C to obtain zinc borate (sample A-2). Table 3 shows the chemical composition and properties of the thus obtained zinc borate (sample A-2), Figure 4 shows its X-ray diffraction pattern, Figure 5 is its scanning electron microscope image.

Embodiment 3

[0193] By adding 72.5 grams of boric acid (B 2 o 3 content of 56.3%) was dissolved in 1000 ml of pure water to prepare an aqueous solution. Add 95.7 grams of zinc white (ZnO content is 99.4%) and 217.5 grams of boric acid (B 2 o 3 content is 56.3%), stir and mix together to make B 2 o 3 The molar ratio of / ZnO was 2.0. Then, the solution was stirred and reacted at 45°C for 120 minutes. The solution was further reacted with stirring at 90°C for 4 hours. The obtained product was filtered, washed with water and dried at 105°C to obtain zinc borate (sample A-3). Table 3 shows the chemical composition and properties of the thus obtained zinc borate (sample A-3), Image 6 shows its X-ray diffraction pattern, Figure 7 An electron micrograph of it is shown.

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Abstract

A zinc borate has a particular chemical composition, has a crystallite size of not smaller than 40 nm as found from diffraction peaks of indexes of planes of (020), (101) and (200) in the X-ray diffraction image (Cu-k alpha ) and contains sodium components in amounts of not larger than 100 ppm as measured by the atomic absorptiometric method.

Description

technical field [0001] The present invention relates to a new zinc borate, its preparation method and its application. More specifically, the present invention relates to a novel zinc borate having an exceptional crystallite size and a very low sodium component, and a method of preparing it. Background technique [0002] In recent years, resin molded articles have been used in various fields, and it is desired to impart flame-retardant properties to these resins. It is further desirable that these resin molded articles, such as building materials, generate relatively small amounts of smoke so as not to hinder escape in the event of a fire. [0003] It has long been known that zinc borate exhibits excellent flame retardant properties. For example, Japanese Examined Patent Publication (Kokoku) No. 67363 / 1981 teaches combining zinc borate with a metal oxide such as Al 2 o 3 , SiO 2 , Sb 2 o 3 , ZnO or ZrO 2 Blended together. [0004] Japanese Unexamined Patent Publicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/00A01N59/16C01B35/10C01B35/12C08K3/38C08L101/00
CPCA61Q17/005C01B35/12A61K8/27C08K3/38A01N59/16
Inventor 泽田宏五十岚宏建部聪坂尾一则
Owner MIZUSAWA INDAL CHEM LTD
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