Needle-shaped strontium carbonate microparticles and dispersion liquid thereof

A technology of strontium carbonate and dispersion liquid, applied in the directions of strontium carbonate, calcium carbonate/strontium/barium, fibrous fillers, etc., can solve the problems of reduced transparency of the molded body, and achieve the effect of high transparency

Active Publication Date: 2016-11-02
UBE IND LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method of dispersing solid particles such as acicular strontium carbonate particles in a polymer res

Method used

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  • Needle-shaped strontium carbonate microparticles and dispersion liquid thereof
  • Needle-shaped strontium carbonate microparticles and dispersion liquid thereof
  • Needle-shaped strontium carbonate microparticles and dispersion liquid thereof

Examples

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preparation example Construction

[0078] As the preparation method of the polymer resin composition, the following method can be enumerated: a polymer resin is added to the acicular strontium carbonate particle dispersion liquid of the present invention, and the polymer resin is dissolved in the dispersion liquid, thereby preparing a needle-shaped A polymer resin solution of strontium carbonate particles, the solution is coated on a substrate to form a coating, and the coating is dried to remove the solvent, thus the polymer resin composition can be prepared. Examples of the method of coating the polymer resin solution on the substrate include a spin coating method and a roll coating method. The polymer resin solution in which acicular strontium carbonate particles are dispersed may be prepared by simultaneously mixing acicular strontium carbonate powder, a polymer resin, and a solvent, or may be prepared by mixing acicular strontium carbonate powder and a solution of a polymer resin. In addition, the polymer ...

Embodiment 1

[0082] (1) Preparation method of needle-like strontium carbonate particle aqueous dispersion

[0083] 366 g of strontium hydroxide octahydrate (manufactured by Kanto Chemical Co., Ltd., deer special grade) was added to 3 L of pure water at a water temperature of 10° C., and mixed to prepare an aqueous dispersion of strontium hydroxide having a concentration of 5.6% by mass. 14.2 g (0.039 g per 1 g of strontium hydroxide) of DL-tartaric acid (manufactured by Wako Pure Chemical Industries, Ltd., reagent grade) was added to this strontium hydroxide aqueous dispersion, and stirred to dissolve DL-tartaric acid in the aqueous dispersion. Then, while maintaining the liquid temperature of the strontium hydroxide aqueous dispersion at 10°C, the stirring was continued, and at the same time, the flow rate of 0.5 L / min (the flow rate of 2.9 mL / min relative to 1 g of strontium hydroxide) was blown into the aqueous dispersion. Carbon dioxide gas was added until the pH of the aqueous dispers...

Embodiment 2

[0091] Acicular strontium carbonate powder was prepared in the same manner as in Example 1 except that polyoxyalkylene alkyl ether phosphoric acid represented by the following formula was used as the surfactant.

[0092] [chemical formula 5]

[0093]

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Abstract

[Problem] To provide: a needle-shaped strontium carbonate powder comprising fine needle-shaped strontium carbonate particles; and a dispersion liquid having the fine needle-shaped strontium carbonate particles dispersed in a primary particle or nearly primary microparticle state in an organic solvent. [Solution] A needle-shaped strontium carbonate powder comprising needle-shaped strontium carbonate particles having an average long diameter for the primary particles of 5-50 nm and having an average aspect ratio of 2.2-5.0; and a dispersion liquid having the majority of the needle-shaped strontium carbonate particles dispersed as primary particles in an organic solvent. Ideally a surfactant, including a hydrophilic group and a hydrophobic group and having a group forming anions in water, is attached to the surface of the needle-shaped strontium carbonate particles.

Description

technical field [0001] The present invention relates to acicular strontium carbonate microparticles and its dispersion. In particular, the present invention relates to: acicular strontium carbonate microparticle dispersion in which most of the acicular strontium carbonate microparticles are dispersed in an organic solvent in the form of primary particles, and needles that can be advantageously used to prepare the acicular strontium carbonate microparticle dispersion. strontium carbonate powder. The present invention also relates to a polymer resin composition comprising a polymer resin containing needle-like strontium carbonate fine particles in a highly dispersed state. Background technique [0002] It is known that when a polymer resin molding is stretched in a specific direction, or when a polymer resin in a molten state is molded with a pressure in a specific direction, the resulting polymer The resin molded article exhibits birefringence. For example, polymer resin m...

Claims

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Application Information

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IPC IPC(8): C01F11/18C08K3/26C08K9/04C08L101/00
CPCC08K9/04C01F11/187C01P2004/10C01P2004/54C01P2004/64C08K2003/265C08K2201/003C08K2201/016C09C1/02C08L69/00
Inventor 野北里花日元武史
Owner UBE IND LTD
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