CN113999545A - Titanium dioxide for high-light-resistance decorative paper and preparation method thereof - Google Patents
Titanium dioxide for high-light-resistance decorative paper and preparation method thereof Download PDFInfo
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- CN113999545A CN113999545A CN202111459341.1A CN202111459341A CN113999545A CN 113999545 A CN113999545 A CN 113999545A CN 202111459341 A CN202111459341 A CN 202111459341A CN 113999545 A CN113999545 A CN 113999545A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3692—Combinations of treatments provided for in groups C09C1/3615 - C09C1/3684
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
Abstract
The invention discloses titanium dioxide for high-light-resistance decorative paper and a preparation method thereof, belonging to the field of chemical industry and being used for improving the light resistance of the titanium dioxide so as to meet the performance requirement of the titanium dioxide for decorative paper. The titanium dioxide takes rutile titanium dioxide particles as raw materials, and the surfaces of the rutile titanium dioxide particles are sequentially provided with an inorganic coating and an organic coating from inside to outside; wherein the inorganic coating materials are aluminum phosphate and hydrated alumina, and the coating amount is 4.0-9.0% of the weight of the titanium dioxide particles; the coating material of the organic coating is trimethylolethane, and the coating amount is 0.1-1.0% of the mass of the titanium dioxide particles. According to the invention, through forming the coating layers of aluminum phosphate and hydrated alumina and the organic treatment layer, the prepared product has excellent light resistance, dispersibility and other properties, the product performance reaches the level of similar products abroad, and the product has actual industrial application value, can be used in the fields of laminated paper and decorative paper, and can replace or partially replace foreign products.
Description
Technical Field
The invention relates to the field of chemical industry, in particular to a preparation method of titanium dioxide for high-light-resistance decorative paper.
Background
Titanium dioxide is a nontoxic and tasteless white inorganic pigment, has the characteristics of good whiteness, opacity (covering power), photochromic and the like, and is a white pigment which has no substitution and optimal performance so far. Because of its outstanding pigment performance and optical performance, it is widely used in the fields of paint, plastics, printing ink, paper making, etc.
Papermaking is the third application field of titanium dioxide, and the titanium dioxide is used as a filler in papermaking, so that the whiteness, light resistance, covering power and other properties of paper can be improved. In the papermaking field, decorative paper is a main consumer of rutile titanium dioxide. The decorative base paper is a novel fashionable environment-friendly material, takes high-quality wood pulp, titanium dioxide and the like as main raw materials, and is used for artificial boards such as fiber boards, shaving boards and the like after being printed and impregnated with melamine resin. In the process of gumming hot pressing, titanium dioxide is sealed in resin, so that titanium dioxide in the laminated product is isolated from outside air, and when the laminated product is irradiated by ultraviolet rays, TiO is irradiated2The titanium pigment is subjected to photocatalytic reaction, and tetravalent titanium on the surface of the titanium pigment is reduced into trivalent titanium, so that the color of the surface of the product is lightened and grayed, and the color of a wood board at the bottom layer of the decorative paper is presented, which is an aging phenomenon. The light resistance is better, and the aging and color change time of the product can be prolonged. Therefore, light resistance is a core and important indicator of titanium white for decorative paper.
Disclosure of Invention
The invention aims to provide titanium dioxide for decorative paper, which can improve light resistance.
The technical scheme adopted by the invention for solving the technical problems is as follows: a titanium dioxide for high light resistance decorative paper takes rutile titanium dioxide particles as raw materials, and the surface of the rutile titanium dioxide particles is sequentially provided with an inorganic coating and an organic coating from inside to outside; wherein the inorganic coating materials are aluminum phosphate and hydrated alumina, and the coating amount is 4.0-9.0% of the weight of the titanium dioxide particles; the coating material of the organic coating is trimethylolethane, and the coating amount is 0.1-1.0% of the mass of the titanium dioxide particles.
In addition, the invention also provides a method for preparing the titanium dioxide for the high-light-resistance decorative paper, which comprises the following specific steps:
(a) taking a rutile type titanium dioxide primary product as a raw material, adding deionized water to prepare a titanium dioxide suspension, adding a dispersing agent, and stirring to obtain titanium dioxide slurry, wherein the concentration of the slurry is kept at 260-500 g/L;
(b) adding the slurry obtained in the step (a) into a four-neck round-bottom flask with stirring, placing the flask into a heating sleeve, starting a stirring device to stir, and heating to 50-80 ℃;
(c) adding phosphoric acid solution within 60-120 min to adjust the pH of the slurry to 1.0-2.0, and then stirring for 30-60 min, wherein the adding amount of phosphoric acid is P2O5The mass of the titanium dioxide accounts for 1.0-3.0%; then adding a sodium metaaluminate solution within 60-120 min to adjust the pH value of the slurry to 4-7, wherein the addition amount of the sodium metaaluminate meets the requirement of adjusting the pH value of the slurry to 4-7, and curing for 45-90 min;
(d) adjusting the pH value to 9-11 by using a sodium hydroxide solution with the mass concentration of 10%, and then adding an aluminum-containing compound and a dilute acid solution in a parallel flow manner or adding the aluminum-containing compound and the dilute acid solution in the parallel flow manner within 120-240 min, wherein the adding amount is Al2O3The mass of the titanium dioxide is 3-6%, the pH value of the slurry is maintained at 9-11, and the slurry is cured for 120-240 min;
(e) adjusting the pH value of the slurry to 7.0-7.5 by using a dilute acid solution with the mass concentration of 10-15%, and curing for 60-120 min;
(f) washing and filtering with deionized water to obtain a filter cake, adding trimethylolethane into the filter cake, wherein the adding amount of trimethylolethane is 0.1-1.0% of the mass of titanium dioxide, drying in a drying oven at 100-110 ℃, and then performing airflow crushing to obtain the titanium dioxide for the high-light-resistance decorative paper.
Further, the method comprises the following steps: the dispersing agent in the step (a) is sodium hexametaphosphate or sodium silicate, and the adding amount of the sodium hexametaphosphate or sodium silicate is 0.1-0.5% of the mass of the titanium dioxide.
Further, the method comprises the following steps: the concentration of the phosphoric acid in the step (c) is 90-150 g/L, and the concentration of the sodium metaaluminate is 50-150 g/L.
Further, the method comprises the following steps: the aluminum-containing compound in the step (d) is one or two of sodium metaaluminate and aluminum sulfate, and the concentration is 50-150 g/L.
Further, the method comprises the following steps: the rutile titanium dioxide starting material in step (a) is produced by a sulfuric acid process or by a chlorination process.
The invention has the beneficial effects that: according to the special requirements of titanium dioxide for decorative paper, the coating layer and the organic treatment layer of aluminum phosphate and hydrated alumina are formed, so that the prepared product has excellent light resistance, dispersibility and other properties, the product performance reaches the level of similar products abroad, the product has actual industrial application value, and the product can be used in the fields of laminated paper and decorative paper and can replace or partially replace foreign products.
Detailed Description
The present invention will be further described with reference to the following embodiments.
It should be noted that, if there are directional indication terms, such as the terms of direction and orientation, above, below, left, right, front and back, in the present invention, for facilitating the description of the relative positional relationship between the components, the absolute position that is not the positional relationship between the related components and the components is specifically referred to, and is only used for explaining the relative positional relationship and the motion situation between the components in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly. When the present invention relates to a number, such as "a plurality", "several", etc., two or more than two are specifically referred to.
Example 1
(a) Adding deionized water into the rutile type titanium dioxide primary product, and simultaneously adding 0.1% sodium silicate for dispersion to prepare titanium dioxide slurry with the concentration of 260 g/L; (b) adding the slurry into a four-neck round-bottom flask, starting stirring, starting a heating device, and heating to 50-80 ℃; (c) adding phosphoric acid solution within 60min, wherein the amount of phosphoric acid is P2O5The mass of the titanium dioxide is 1.5%, the pH value of the slurry is adjusted to 1.0-2.0, and the slurry is stirred for 30 min; then adding a sodium metaaluminate solution within 60min until the pH value of the slurry is within the range of 4-7, stirring and curing for 45 min; (d) adjusting the pH value of the slurry to 9-11 by using a 10% sodium hydroxide solution, and then adding sodium metaaluminate and dilute acid in a concurrent flow manner within 120min, wherein the addition amount is Al2O3The mass of the titanium dioxide is 3%, the pH value of the slurry is maintained at 9-11, and the slurry is cured for 120 min; (e) adjusting the pH value of the slurry to 7.0-7.5 by using a dilute acid solution with the mass concentration of 10-15%, and curing for 60 min; (f) the mixture was washed with deionized water and filtered, and trimethylolethane was added to the cake in an amount of 0.1% by mass of titanium dioxide, followed by drying at 105 ℃ and jet milling to obtain the sample of example 1.
Example 2
(a) Adding deionized water into the rutile type titanium dioxide primary product, and simultaneously adding 0.1% sodium silicate for dispersion to prepare titanium dioxide slurry with the concentration of 260 g/L; (b) adding the slurry into a four-neck round-bottom flask, starting stirring, starting a heating device, and heating to 50-80 ℃; (c) adding phosphoric acid solution within 90min, wherein the amount of phosphoric acid is P2O5The mass of the titanium dioxide is 2%, the pH value of the slurry is adjusted to 1.0-2.0, and the slurry is stirred for 30 min; then adding a sodium metaaluminate solution within 60min until the pH value of the slurry is within the range of 4-7, stirring and curing for 60 min; (d) adjusting the pH value of the slurry to 9-11 by using a 10% sodium hydroxide solution, and then adding sodium metaaluminate and dilute acid in a concurrent flow manner within 150min, wherein the addition amount is Al2O3The mass of the titanium dioxide is 3.5%, the pH value of the slurry is maintained at 9-11, and the slurry is cured for 120 min; adjusting the pH value of the slurry to 7.0-7.5 by using a dilute acid solution with the mass concentration of 10-15%, and curing for 60 min; (f) the mixture was washed with deionized water and filtered, and trimethylolethane was added to the cake in an amount of 0.1% by mass of titanium dioxide, followed by drying at 105 ℃ and jet milling to obtain the sample of example 2.
Example 3
(a) Adding deionized water into the rutile type titanium dioxide primary product, and simultaneously adding 0.1% sodium silicate for dispersion to prepare titanium dioxide slurry with the concentration of 260 g/L; (b) adding the slurry into a four-neck round-bottom flask, starting stirring, starting a heating device, and heating to 50-80 ℃; (c) adding phosphoric acid solution within 120min, wherein the amount of phosphoric acid is P2O5The mass of the slurry is 2.5 percent of that of the titanium dioxide, the pH value of the slurry is adjusted to 1.0-2.0, and the slurry is stirred for 30 min; then adding a sodium metaaluminate solution within 60min until the pH value of the slurry is within the range of 4-7, stirring and curing for 90 min; (d) adjusting the pH value of the slurry to 9-11 by using 10% sodium hydroxide solution, and then performing parallel flow within 180minAdding sodium metaaluminate and dilute acid in the amount of Al2O3The content of the titanium dioxide is 4%, the pH value of the slurry is maintained at 9-11, and the slurry is cured for 120 min; adjusting the pH value of the slurry to 7.0-7.5 by using a dilute acid solution with the mass concentration of 10-15%, and curing for 60 min; (f) the mixture was washed with deionized water and filtered, and trimethylolethane was added to the cake in an amount of 0.1% by mass of titanium dioxide, followed by drying at 105 ℃ and jet milling to obtain the sample of example 3.
The application performance test is carried out on the embodiments 1-3, and the detection method comprises the following steps: respectively adding the prepared three samples into deionized water and melamine resin, uniformly mixing, coating to prepare a sample wafer, and detecting the initial Lab value of the sample wafer by using a spectrocolorimeter; and (3) putting the sample into a rapid solarization instrument, shielding one part of the sample by using an opaque aluminum plate, taking out the other part of the sample after being solarized for 2 hours, and measuring the Lab value of the insolated part again. And calculating the color difference delta E according to the Lab value before and after drying. The smaller Δ E, the better the light resistance. Δ E is calculated as:
TABLE 1 color difference of different samples
Wherein: the comparative sample 1 is a titanium dioxide sample prepared by a sulfuric acid method in the prior art; comparative sample 2 is a titanium dioxide sample prepared by a chlorination process in the prior art.
Claims (6)
1. The titanium dioxide for the high-light-resistance decorative paper is characterized in that: rutile type titanium dioxide particles are used as raw materials, and an inorganic coating and an organic coating are sequentially arranged on the surfaces of the rutile type titanium dioxide particles from inside to outside; wherein the inorganic coating materials are aluminum phosphate and hydrated alumina, and the coating amount is 4.0-9.0% of the weight of the titanium dioxide particles; the coating material of the organic coating is trimethylolethane, and the coating amount is 0.1-1.0% of the mass of the titanium dioxide particles.
2. The preparation method of the titanium dioxide for the high-light-resistance decorative paper, disclosed by claim 1, is characterized by comprising the following steps of: the method comprises the following specific steps:
(a) taking a rutile type titanium dioxide primary product as a raw material, adding deionized water to prepare a titanium dioxide suspension, adding a dispersing agent, and stirring to obtain titanium dioxide slurry, wherein the concentration of the slurry is kept at 260-500 g/L;
(b) adding the slurry obtained in the step (a) into a four-neck round-bottom flask with stirring, placing the flask into a heating sleeve, starting a stirring device to stir, and heating to 50-80 ℃;
(c) adding phosphoric acid solution within 60-120 min to adjust the pH of the slurry to 1.0-2.0, and then stirring for 30-60 min, wherein the adding amount of phosphoric acid is P2O5The mass of the titanium dioxide accounts for 1.0-3.0%; then adding a sodium metaaluminate solution within 60-120 min to adjust the pH value of the slurry to 4-7, wherein the addition amount of the sodium metaaluminate meets the requirement of adjusting the pH value of the slurry to 4-7, and curing for 45-90 min;
(d) adjusting the pH value to 9-11 by using a sodium hydroxide solution with the mass concentration of 10%, and then adding an aluminum-containing compound and a dilute acid solution in a parallel flow manner or adding the aluminum-containing compound and the dilute acid solution in the parallel flow manner within 120-240 min, wherein the adding amount is Al2O3The mass of the titanium dioxide is 3-6%, the pH value of the slurry is maintained at 9-11, and the slurry is cured for 120-240 min;
(e) adjusting the pH value of the slurry to 7.0-7.5 by using a dilute acid solution with the mass concentration of 10-15%, and curing for 60-120 min;
(f) washing and filtering with deionized water to obtain a filter cake, adding trimethylolethane into the filter cake, wherein the adding amount of trimethylolethane is 0.1-1.0% of the mass of titanium dioxide, drying in a drying oven at 100-110 ℃, and then performing airflow crushing to obtain the titanium dioxide for the high-light-resistance decorative paper.
3. The preparation method of the titanium dioxide for the high-light-resistance decorative paper, according to claim 2, is characterized in that: the dispersing agent in the step (a) is sodium hexametaphosphate or sodium silicate, and the adding amount of the sodium hexametaphosphate or sodium silicate is 0.1-0.5% of the mass of the titanium dioxide.
4. The preparation method of the titanium dioxide for the high-light-resistance decorative paper, according to claim 2, is characterized in that: the concentration of the phosphoric acid in the step (c) is 90-150 g/L, and the concentration of the sodium metaaluminate is 50-150 g/L.
5. The preparation method of the titanium dioxide for the high-light-resistance decorative paper, according to claim 2, is characterized in that: the aluminum-containing compound in the step (d) is one or two of sodium metaaluminate and aluminum sulfate, and the concentration is 50-150 g/L.
6. The method for preparing titanium dioxide for high-light-resistance decorative paper according to any one of claims 2 to 5, wherein the method comprises the following steps: the rutile titanium dioxide starting material in step (a) is produced by a sulfuric acid process or by a chlorination process.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115960476A (en) * | 2022-12-22 | 2023-04-14 | 攀钢集团重庆钒钛科技有限公司 | Preparation method of chlorinated titanium dioxide special for decorative paper |
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