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Preparation method of high-dispersion light-stable titanium white powder

A high-dispersity, light-stable technology, applied in chemical instruments and methods, dyed high-molecular organic compound treatment, dyed low-molecular-weight organic compound treatment, etc. problem, to achieve the effect of improving ultraviolet absorption rate, high fluorescence quantum yield, and reducing moisture absorption

Inactive Publication Date: 2019-10-25
王志胜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem mainly solved by the present invention is that the light stability of the current titanium dioxide is poor. In the presence of moisture, the oxygen ions on the titanium dioxide lattice will lose two electrons and become oxygen atoms when irradiated by sunlight. This new ecological oxygen has extremely Strong activity, thus causing the oxidation of organic substances in the coating film, causing chain scission and degradation of polymer organic matter, and finally making the coating film pulverization, loss of gloss, and yellowing, and titanium dioxide is easy to absorb moisture and reunite when used in water-based coatings. The defect of poor dispersibility provides a preparation method of highly dispersible light-stable titanium dioxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The organic dispersant is: sodium polycarboxylate

[0033] Preparation of cationized coumarin:

[0034] In parts by weight, 15 parts of 3-aminophenol, 10 parts of ethyl acetoacetate, 17 parts of zinc chloride and 70 parts of absolute ethanol were placed in a three-necked flask with a stirrer and a condensing reflux tube. Heating to 70°C under protection, starting the stirrer to keep stirring at a speed of 400r / min, condensing and refluxing for 14 hours, and naturally cooling to room temperature to obtain the reaction liquid;

[0035] Add hydrochloric acid with an equal volume mass fraction of 10% to the above reaction solution, stir and mix for 10 minutes, filter and remove the filtrate to obtain a solid product, wash the solid product with distilled water for 3 times, place in an oven, heat up to 60°C, and dry for 8 hours , to obtain a dry product, and recrystallize the dry product with isopropanol to obtain coumarin crystals;

[0036] In parts by weight, 8 parts of ...

Embodiment 2

[0043] The organic dispersant is: sodium polyacrylate

[0044] Preparation of cationized coumarin:

[0045] In parts by weight, 17 parts of 3-aminophenol, 11 parts of ethyl acetoacetate, 18 parts of zinc chloride and 75 parts of absolute ethanol were placed in a three-necked flask with a stirrer and a condensing reflux tube. Heated to 75°C under protection, started the stirrer to keep stirring at a speed of 420r / min, condensed and refluxed for 15 hours, and naturally cooled to room temperature to obtain the reaction liquid;

[0046] Add hydrochloric acid with an equal volume mass fraction of 10% to the above reaction solution, stir and mix for 12 minutes, filter and remove the filtrate to obtain a solid product, wash the solid product with distilled water 3 times, put it in an oven, heat up to 65 ° C, and dry for 8.5 h, to obtain a dry product, and recrystallize the dry product with isopropanol to obtain coumarin crystals;

[0047] In parts by weight, 9 parts of the above-me...

Embodiment 3

[0054] The organic dispersant is: polyacrylamide

[0055] Preparation of cationized coumarin:

[0056] In parts by weight, get 18 parts of 3-aminophenol, 12 parts of ethyl acetoacetate, 20 parts of zinc chloride and 80 parts of absolute ethanol, place in a three-necked flask with a stirrer and a condensing reflux tube, under nitrogen Heated to 80°C under protection, started the stirrer to keep stirring at a speed of 450r / min, condensed and refluxed for 16 hours, and naturally cooled to room temperature to obtain the reaction liquid;

[0057] Add hydrochloric acid with an equal volume mass fraction of 10% to the above reaction solution, stir and mix for 15 minutes, filter and remove the filtrate to obtain a solid product, wash the solid product with distilled water 4 times, place in an oven, heat up to 70°C, and dry for 9 hours , to obtain a dry product, and recrystallize the dry product with isopropanol to obtain coumarin crystals;

[0058] In parts by weight, 10 parts of th...

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PUM

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Abstract

The invention discloses a preparation method of high-dispersion light-stable titanium white powder, and belongs to the technical field of chemical engineering. Coumarin prepared by the preparation method of the high-dispersion light-stable titanium white powderis high in fluorescence quantum yield and high in stability, a quaternary ammonium group is introduced throughreaction with 2,3-epoxypropyltrimethylammoniumchloride, the ultraviolet absorption rate of a light stabilizer is increased, and the quaternary amino group can be combined with hydroxyl radicals in water and adsorbed onto the surface of titanium dioxide to form a light-stable protective layer to prevent photooxidation of the titanium dioxide of the titanium white powder; theprepared organic light-stable coumarin on the surfaceof the titanium white powder is poor in water solubility,thus moisture absorption of the titanium white powder can be reduced,the coumarin in the light stabilizer fills between laminates of zinc-aluminum talcumpowder under theelectrostatic repulsion effect of highly charged zinc-aluminum cations in the talcum powder due to the fact that the quaternary amino group is introduced, thusthe inner surface of the titanium white powder is waterproof, so that the water dispersibility of the titanium white powder is improved, an organic dispersant is added to improve the water dispersibility of the titanium white powder in aqueous coating.

Description

technical field [0001] The invention discloses a preparation method of high-dispersibility light-stable titanium dioxide, which belongs to the technical field of chemical industry. Background technique [0002] Titanium dioxide is an important inorganic chemical product, which has important uses in industries such as paint, ink, papermaking, plastic rubber, chemical fiber, and ceramics. Titanium dioxide is a white pigment whose main component is titanium dioxide. The scientific name is titanium dioxide, and the molecular formula is TiO 2 , is a polycrystalline compound whose particles are arranged regularly and has a lattice structure. Titanium dioxide has the smallest relative density. The production process of titanium dioxide has two process routes: sulfuric acid method and chlorination method. [0003] The main application fields of titanium dioxide: coatings, plastics, inks, papermaking, of which coatings account for 60%, plastics account for 20%, papermaking accoun...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/08C09C3/10
CPCC09C1/3653C09C1/3661C09C1/3669C09C1/3676C09C1/3692C09C3/006C09C3/06C09C3/063C09C3/08C09C3/10
Inventor 王志胜
Owner 王志胜
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