GR composite titanium dioxide pigment is selected for its structure, appearance, particle size distribution, etcTitanium whiteSimilar, and the surface has reactionactivityAs the basic raw material (core),TiO2It is a capsule, and new materials are appliedModificationHigh and new technologies such as composite preparation, inorganic coating, powder homogenization, etcHydroxylationNew type products prepared by modification and mechanochemical reactionreunite withWhite pigment.
GR composite titanium dioxide pigment hasTitanium dioxideSame or similar physical and chemical properties, so it hastitanium dioxide pigment nature.Widely used in paint, plastic, rubber and ink industries, it can achieve the same technical performance as titanium dioxide, and greatly reduce the use cost of raw materials.
The production and application of GR composite titanium dioxide pigment is an effective way to solve the shortage of titanium resources in the production of titanium dioxide, reduce environmental pollution and improve the utilization rate of titanium dioxide resources.The preparation and application technology of the product has passed the expert appraisal organized by Beijing Municipal Science and Technology Commission, and has been evaluated to reach the international advanced level. The product has been evaluated as Anhui Provincenew and high-tech product。
Performance characteristics
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1. The preparation technology of GR composite titanium dioxide pigment has reached the international advanced level. The selection of core coating material, the surface hydroxylation of core coating material and coating material, and the characteristics of composite white pigment with similar or the same performance as titanium dioxide are all pioneering at home and abroad.
2. The surface of GR composite titanium dioxide pigment particles shows crystalline TiO2 performance, and the crystal forms are divided into rutile type and anatase type, so the product has the same or similar performance as titanium dioxide, such as hiding power, whiteness, oil absorption, etc.
3. GR composite titanium white pigment andTitanium dioxideRatio: product granularityParticle size distributionBetter, the heterogeneous nature and low density of the composite make the product have better dispersion and applicability when used in the paint system.
4. The consumption cost is significantly lower than that of titanium dioxide, and the product cost is less than 3000-5000 yuan/ton of titanium dioxide.
5. The production process has no pollution to the environment and conforms to the national industrial policy of sustainable development.
Performance verification
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Main impacts
The covering performance of paint is the most direct and key indicator reflecting the performance of white pigment. On the premise that other components and conditions of paint are the same, the stronger the covering power of paint is, the stronger the covering performance of paint is.
Shielding performance
Mix GR composite titanium dioxide pigment (rutile type) and rutile titanium dioxide (R818) with water to form a 0.2% suspension. After ultrasonic dispersion for 20 minutes, sample and put into 72 type ultraviolet andVisible spectrophotometerTest its light transmittance (see Table 4) to determine the absorption of ultraviolet light by the product.
The transmittance of GR composite titanium dioxide pigment, rutile titanium dioxide and water suspensions to monochromatic light of each wavelength is basically consistent with the law, and the transmittance to ultraviolet light with wavelength less than 400nm is extremely low. With the increase of incident light wavelength, the light transmittance of the suspensions increases significantly, reaching more than 40% at 700nm.Since the difference in the transmissivity of suspension can be approximately attributed to the factors of solid matter itself, it is believed that GR composite titanium dioxide pigment has a strong absorption and shielding effect on ultraviolet light compared with rutile titanium dioxide.
Rutile titanium dioxide has the best absorption and shielding effect on ultraviolet raychemical stabilityWith good aging resistance, anti pulverization and anti discoloration performance, GR composite titanium dioxide pigment presents similar optical characteristics, which shows that it also has aging resistance and other light stability properties.
From the above two experiments, it can be seen that: using GR composite titanium dioxide pigment in the paint system can limit the same or similar performance indicators as titanium dioxide;GR composite titanium dioxide pigment can be widely used in coating systems to improve the performance of coatings and significantly reduce the cost of materials.
