Barium sulfate composite particles, resin composition containing same, and process for producing same

A resin composition, composite particle technology, applied in the direction of calcium/strontium/barium compounds, zinc compounds, chemical instruments and methods, etc., can solve the problems of deterioration, agglomeration, corrosion and other problems of electrode metal parts of electronic equipment, and achieve functional improvement. Effect

Active Publication Date: 2015-03-11
SAKAI CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a problem that barium sulfate synthesized using barium sulfide as a raw material contains sulfur components as impurities, and even in the state of being mixed with ink or resin composition, the sulfide volatilizes depending on the conditions, causing electrons to Deterioration and corrosion of metal parts such as electrodes of the device may impair the function, durability and reliability of the electronic device
Even if the fine zinc oxide described in Patent Document 2 is mixed directly, the fine zinc oxide aggregates and clogs the filter used in the process.

Method used

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  • Barium sulfate composite particles, resin composition containing same, and process for producing same
  • Barium sulfate composite particles, resin composition containing same, and process for producing same
  • Barium sulfate composite particles, resin composition containing same, and process for producing same

Examples

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Effect test

Embodiment 1

[0054] Add 500 g of barium sulfate "BARIACE B-55" manufactured by Sakai Chemical Industry Co., Ltd. into a beaker with an inner volume of 3 L, adjust to 2.5 L with water, reslurry with a stirrer at 40 ° C for 10 minutes, and then add 3% NaOH aqueous solution 12.5 mL. 6.5 mL of a 148 g / L zinc sulfate aqueous solution was added dropwise to the slurry at 1 mL / min, followed by aging in this state for 15 minutes. The pH of the slurry at this time was 9.1. After aging, use 5C filter paper to filter the slurry, wash with ion-exchanged water after filtration, and continue washing until the conductivity of the filtrate reaches below 150 μS / cm. After washing with water, it was left still for 12 hours in a box-type drier at 105° C., and dried. The dried product was pulverized at a pulverization pressure of 0.7 MPa and a pulverization speed of 20 g / min using a Nissin Engineering Co., Ltd. jet mill SJ-500 to obtain barium sulfate composite particles.

Embodiment 2

[0056] Except for adding 19.2 mL of 3% NaOH aqueous solution and 9.8 mL of 148 g / L zinc sulfate aqueous solution, the same operations as in Example 1 were carried out to obtain barium sulfate composite particles. The pH of the slurry before filtration was 9.0.

Embodiment 3

[0058] Except that the added 3% NaOH aqueous solution was 38.4 mL and the 148 g / L zinc sulfate aqueous solution was 19.6 mL, the same operation as in Example 1 was carried out to obtain barium sulfate composite particles. The pH of the slurry before filtration was 9.1.

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Abstract

[Problem] With respect to barium sulfate which is for use in electronic appliances as a filler for resin compositions, precipitated barium sulfate synthesized from barium sulfide as a starting material has a problem that since the barium sulfate contains sulfur as an impurity, use thereof in a resin composition for an ink, film, sheet, or the like that is for use in an electronic appliance results in a possibility that the hydrogen sulfide which has volatilized from the barium sulfate might deteriorate or corrode metallic portions, e.g., electrodes, of electronic components, thereby impairing the function, durability, and reliability of the electronic appliance. [Solution] Barium sulfate composite particles which comprise barium sulfate particles and a zinc compound adhered to the surface thereof and which have an average particle diameter of 0.01-10 µm.

Description

technical field [0001] The present invention relates to barium sulfate composite particles, a method for producing the same, and a resin composition mixed with the barium sulfate composite particles. Background technique [0002] Barium sulfate is used in various fields as a general-purpose filler. Among them, resin compositions such as inks, films, and sheets used in electronic devices are widely used. [0003] For barium sulfate used as a filler in electronic equipment, chemically synthesized precipitating barium sulfate is widely used, but as a production method that is particularly suitable for mass production, it is generally obtained by reducing and roasting barite. Precipitating barium sulfate synthesized from barium sulfide as raw material. Barium sulfate synthesized from this barium sulfide is particularly suitable not only for coatings but also for resin compositions such as inks, films, and sheets requiring high dispersibility due to its excellent dispersibility...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/02C01F11/46C01G9/00C08L63/00C08L67/00C08L101/00G02B5/02H05K3/28
CPCC08L101/00C08J2367/02C09C1/027G02B5/0268C08L63/00C01P2004/03C08K2003/3045C01F11/462C01P2004/61C01G9/00C08K9/02C08J2467/02C08J3/226C08L67/00C01P2004/80C01P2004/64C01P2004/04C01P2002/85G02B5/0284C01P2004/62B82Y30/00C08L67/02C08K3/30
Inventor 志水勇介三宅淳一泉川博幸麻田雅幸
Owner SAKAI CHEM IND CO LTD
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