Method for preparing single-piece talc powder

Abstract

The invention relates to a method for preparing single-piece talc powder. The method comprises the following steps: (1) adding talc powder and a coupling agent to a high-speed mixing stirrer to obtaina premixed substance; (2) dispersing and mixing the premixed substance obtained in the step (1) and a foaming agent, and adding the mixed material into a rotary homogenizer, and stripping the talc powder step by step under the shearing action of rotating blades to obtain a primary product of the single-piece talc powder; and (3) separately washing the primary product of the single-piece talc powder obtained in the step (2) with water and acetone, and performing drying to obtain the single-piece talc powder. Compared with the prior art, the talc powder prepared by the method provided by the invention has high efficiency and low costs, can be widely used in a filler, and has broad market application prospects.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic mineral materials, in particular to a method for preparing monolithic talc powder. Background technique [0002] Talc is a white, soft, hydrophobic mineral that belongs to the magnesium silicate structure containing crystal water. It consists of a three-layer structure: two silicon-containing layers sandwiching a magnesium oxide or magnesium hydroxide layer. Unlike other silicate layered minerals (such as china clay), the three-layer structure of talc crystals is in perfect electrical balance, making it inherently charged with little or no charge. The lack of charge makes talc a non-polar or hydrophobic mineral, which makes it better adsorbed on other hydrophobic substances such as stickies and resins, which is why talc is widely used as a resin and glue. The cause of sticky control agents. [0003] Talc powder is one of the most important inorganic chemical products today. Due to the adv...

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Problems solved by technology

[0007] Chinese Patent Publication No. CN101678246A discloses a method for controlling the shape of talc particles. The method is to pulverize talcum powder in a homogenizer first, and then use a ball mill to peel off to obtain talcum powder. Although the talcum powder has controllable particle shape, whiteness However, due to the uncontrollable force on the talc powder particles during the peeling process of the ball mill, it will damage the talc powder sheet structure and affect the functionality of the talc powder, and only part of the talc powder particles are peeled off, which is low in efficiency. poor effect

[0008] According to the above, in the current methods of deep processing and modification of talcum powder, there is no peeling treatment method for talcum powder. Although talc powder is partially peeled off during the grinding process, the efficiency is low and the effect is poor. The talcum powder with lamellar structure will be damaged by mechanical force and other defects, resulting in low added value and poor functionality of talcum powder products. The filling amount in rubber, plastic, paper and other products is small. When the filling amount is large, the mechanical properties of the product and Decreased processing performance affects the application of talc powder in high value-added products

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