Composite titanium pigment and preparation thereof
A technology for compounding titanium dioxide and titanium dioxide paste, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve problems such as insufficient bonding, insufficient covering power, and low weather resistance, and achieve whiteness value High, strong hiding power, low cost effect
Inactive Publication Date: 2011-07-20
PANZHIHUA UNIV
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Problems solved by technology
The method utilizes the existing calcium carbonate production process, and industrial production can be realized after adding some processes. As long as the composite pigment meets the performance requirements, the application prospect is very promising, but the combination of calcium carbonate and titanium dioxide in the composite titanium dioxide prepared by this method is not enough. Strong, not strong enough in hiding power, and not high in weather resistance
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0028] Embodiment 1 Preparation of composite titanium dioxide of the present invention (TiO 2 content is 35%)
[0029] 1. Prepare 4L of hot water at about 70°C.
[0030] 2. Weigh 480g of quicklime (CaO) and pour it into a high-speed disperser.
[0031] 3. Pour 4L of hot water at about 70°C into the disperser, and stir at a low speed (1000-2000r / min) for 30 minutes.
[0032] 4. Pour out all the lime slurry in the disperser, first sieve it with a sieve of about 100 mesh, and then sieve it with a sieve of about 200-325 mesh to obtain Ca(OH) 2 Concentration of about 12.3% Ca(OH) 2 The slurry is about 4L.
[0033] 5. Add Ca(OH) 2 The slurry is poured into a disperser, and aged for 16-24 hours under slight stirring, and the stirring speed is based on the principle of not settling. Before carbonization, add about 500ml of water to replenish the volume to 4L.
[0034] 6. Take 570g of anatase titanium dioxide and add it into a high-speed disperser. Pour 1L of water and disperse f...
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Abstract
The present invention relates to a composite titanium pigment and a preparation method thereof and belongs to the chemical industry filed. The technical problem that the invention solves is that the composite titanium pigment has a low cost and better performance and is what the common dope, dye and paper-making users need. The present invention also provides a preparation method of the composite titanium pigment. The titanium pigment has sodium silicate as the adhesive and film coating agent and is obtained by embedding TiO2 granule on the surface of a light calcium carbonate substrate. The composite titanium pigment is high in white value, strong in hiding power, good in weather resistance and low in cost ( tantamount to one third of the cost of common titanium pigment), is very easy to realize industrialization and can be widely used in dope, dye and paper-making fields, boasting a broad application prospect.
Description
technical field [0001] The invention relates to a composite titanium dioxide and a preparation method thereof, belonging to the field of chemical industry. Background technique [0002] As a white pigment, titanium dioxide has high hiding power, high color reduction power, high finish, high whiteness and strong weather resistance due to its superior density, dielectric constant and refractive index, and it is also chemically inert , non-toxic, harmless to the human body and other properties, so it has become the best white pigment so far, widely used in more than 20 fields such as architectural coatings, plastics, papermaking, inks, chemical fibers, electric welding, enamel, and daily chemicals. However, because the production cost of titanium dioxide is higher than that of other white pigments, the cost difference is large, and the titanium ore resources are increasingly scarce in recent years, which limits the wide application of titanium dioxide. Therefore, how to reduce...
Claims
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IPC IPC(8): C09C1/36C09C1/02C09C3/06
Inventor 邹建新杨成高邦禄彭富昌
Owner PANZHIHUA UNIV