阅读说明：本技术 一种预分散复合钛白粉及制备方法 (Pre-dispersed composite titanium dioxide and preparation method thereof ) 是由 邵天山 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种预分散复合钛白粉及制备方法,复合钛白粉包括以下组份按质量份配比：偶联剂0～30份、脂肪酸0.1～50份、高岭土0.1～40份、碳酸钙0.1～80份、钛白粉20～80份。制备方法包括以下步骤：S1、将质量配比为偶联剂0～30份、脂肪酸0.1～50份、高岭土0.1～40份、碳酸钙0.1～80份的原材料进行混合；S2、将混合后的原材料加入60℃～160℃的搅拌机中进行高速剪切；S3、对粉体进行高速剪切至少5分钟,然后向搅拌机中加入质量份数为20～80的钛白粉,然后继续对混合粉体进行高速剪切,高速剪切至少3分钟,对钛白粉进行表面包覆；然后冷却至室温,即得成品。本发明钛白粉着色效率高,着色均匀,降低使用量,绿色环保。(The invention discloses a pre-dispersed composite titanium dioxide and a preparation method thereof, wherein the composite titanium dioxide comprises the following components in parts by mass: 0-30 parts of coupling agent, 0.1-50 parts of fatty acid, 0.1-40 parts of kaolin, 0.1-80 parts of calcium carbonate and 20-80 parts of titanium dioxide. The preparation method comprises the following steps: s1, mixing raw materials, namely 0-30 parts of coupling agent, 0.1-50 parts of fatty acid, 0.1-40 parts of kaolin and 0.1-80 parts of calcium carbonate in mass ratio; s2, adding the mixed raw materials into a stirrer at the temperature of 60-160 ℃ for high-speed shearing; s3, performing high-speed shearing on the powder for at least 5 minutes, adding 20-80 parts by mass of titanium dioxide into the stirrer, continuing performing high-speed shearing on the mixed powder for at least 3 minutes, and performing surface coating on the titanium dioxide; then cooling to room temperature to obtain the finished product. The titanium dioxide powder has high coloring efficiency, uniform coloring, reduced usage amount and environmental protection.)

1. The pre-dispersed composite titanium dioxide is characterized by comprising the following components in parts by mass: 0-30 parts of coupling agent, 0.1-50 parts of fatty acid, 0.1-40 parts of kaolin, 0.1-80 parts of calcium carbonate and 20-80 parts of titanium dioxide.

2. A preparation method of pre-dispersed composite titanium dioxide is characterized by comprising the following steps:

s1, mixing raw materials, namely 0-30 parts of coupling agent, 0.1-50 parts of fatty acid, 0.1-40 parts of kaolin and 0.1-80 parts of calcium carbonate in mass ratio;

s2, adding the mixed raw materials into a stirrer at the temperature of 60-160 ℃ for high-speed shearing;

s3, performing high-speed shearing on the powder for at least 5 minutes, adding 20-80 parts by mass of titanium dioxide into the stirrer, continuing performing high-speed shearing on the mixed powder for at least 3 minutes, and performing surface coating on the titanium dioxide; then cooling to room temperature to obtain the finished product.

Technical Field

The invention relates to a pre-dispersed composite titanium dioxide and a preparation method thereof.

Background

Titanium dioxide (titanium dioxide) is stable in chemical property and does not react with most substances under general conditions. There are three types of titanium dioxide crystals in nature: brookite, anatase, and rutile. The brookite type is an unstable crystal form and has no industrial utilization value, the anatase type is called A type for short, and the rutile type is called R type for short, both have stable crystal lattices, are important white pigments and porcelain glaze materials, and have superior whiteness, tinting strength, covering power, weather resistance, heat resistance and chemical stability compared with other white pigments, and particularly have no toxicity.

Titanium dioxide is widely used in the industries of paint, plastics, rubber, printing ink, paper, chemical fiber, ceramics, daily chemicals, medicine, food and the like. The coating industry is a large consumer of titanium dioxide, especially rutile type titanium dioxide, and most of the titanium dioxide is consumed by the coating industry. The paint made of titanium white powder has bright color, high covering power, strong tinting strength, less consumption and various varieties, can play a role in protecting the stability of a medium, can enhance the mechanical strength and adhesive force of a paint film, prevent cracks, prevent ultraviolet rays and moisture from permeating and prolong the service life of the paint film.

The plastic industry is the second major user, and the titanium dioxide is added into the plastic, so that the heat resistance, the light resistance and the weather resistance of the plastic product can be improved, the physical and chemical properties of the plastic product are improved, the mechanical strength of the product is enhanced, and the service life is prolonged.

The papermaking industry is the third major user of titanium dioxide, and the titanium dioxide is used as a paper filler and mainly used in high-grade paper and thin paper. The titanium dioxide is added into the paper, so that the paper has better whiteness, good gloss, high strength, thinness, smoothness, no penetration during printing and light weight. The titanium dioxide for papermaking generally uses anatase titanium dioxide which is not subjected to surface treatment, and can play a role of a fluorescent whitening agent and increase the whiteness of paper. However, the laminated paper requires the use of surface-treated rutile type titanium dioxide to satisfy the requirements of light resistance and heat resistance.

Titanium dioxide is also an indispensable white pigment in high-grade ink. The ink containing titanium dioxide is durable, does not change color, has good surface wettability and is easy to disperse. Titanium dioxide used in the ink industry is in the rutile type and also in the anatase type.

The textile and chemical fiber industries are another important application field of titanium dioxide. Titanium dioxide is mainly used as a delustering agent for chemical fibers. Since the anatase type is softer than the rutile type, the anatase type is generally used. Titanium dioxide for chemical fibers generally does not need surface treatment, but some special varieties need surface treatment in order to reduce the photochemical effect of titanium dioxide and avoid the degradation of fibers under the photocatalysis of titanium dioxide.

The titanium dioxide has high cost in industrial use, is not enough compatible with organic resin, and is easy to agglomerate, so the dispersion effect is not ideal, and the defect of uneven coloring of products exists.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the pre-dispersed composite titanium dioxide and the preparation method thereof, wherein the pre-dispersed composite titanium dioxide can ensure that a product does not agglomerate, has better dispersion performance, can be better compatible with organic resin, improves the coloring rate and the covering property of the titanium dioxide, can reduce the using amount of pure titanium dioxide, and is green and environment-friendly.

The purpose of the invention is realized by the following technical scheme: the pre-dispersed composite titanium dioxide comprises the following components in parts by mass: 0-30 parts of coupling agent, 0.1-50 parts of fatty acid, 0.1-40 parts of kaolin, 0.1-80 parts of calcium carbonate and 20-80 parts of titanium dioxide.

The invention also provides a preparation method of the pre-dispersed composite titanium dioxide, which comprises the following steps:

s1, mixing raw materials, namely 0-30 parts of coupling agent, 0.1-50 parts of fatty acid, 0.1-40 parts of kaolin and 0.1-80 parts of calcium carbonate in mass ratio;

s2, adding the mixed raw materials into a stirrer at the temperature of 60-160 ℃ for high-speed shearing;

s3, performing high-speed shearing on the powder for at least 5 minutes, adding 20-80 parts by mass of titanium dioxide into the stirrer, continuing performing high-speed shearing on the mixed powder for at least 3 minutes, and performing surface coating on the titanium dioxide; then cooling to room temperature to obtain the finished product.

According to the invention, substances such as kaolin, calcium carbonate, fatty acid and coupling agent are added into the titanium dioxide, and the kaolin has the advantages of high whiteness, low viscosity concentration, fine granularity, good weather resistance and stability and the like; the calcium carbonate has good stability and good physical isolation performance; the coupling agent and the fatty acid can ensure that the product does not agglomerate, has better dispersion performance, can be better compatible with organic resin, improves the coloring rate of the titanium dioxide, can reduce the using amount of the pure titanium dioxide, and is green and environment-friendly.

Detailed Description

The technical scheme of the invention is further explained by combining specific examples.