CN114958034A - Preparation method of titanium dioxide organic composite coating for plastics - Google Patents
Preparation method of titanium dioxide organic composite coating for plastics Download PDFInfo
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- CN114958034A CN114958034A CN202210614315.XA CN202210614315A CN114958034A CN 114958034 A CN114958034 A CN 114958034A CN 202210614315 A CN202210614315 A CN 202210614315A CN 114958034 A CN114958034 A CN 114958034A
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- titanium dioxide
- filter cake
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- composite coating
- temperature
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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
-
- 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
- C09C1/3607—Titanium dioxide
- C09C1/3615—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C1/3623—Grinding
-
- 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
- C09C1/3607—Titanium dioxide
- C09C1/3669—Treatment with low-molecular organic compounds
-
- 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
- C09C1/3607—Titanium dioxide
- C09C1/3676—Treatment with macro-molecular organic compounds
-
- 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
- C09C1/3607—Titanium dioxide
- C09C1/3684—Treatment with organo-silicon compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a preparation method of organic composite coating of titanium dioxide for plastics, belonging to the technical field of titanium dioxide production. The problem of among the prior art titanium white powder organic coating raise dust great, separate out easily in the use and influence the intensity of resin is solved. The invention comprises the following steps of 1: conveying the qualified filter cake to a flash evaporation feeding bin, and simultaneously adding an auxiliary agent A at the inlet of the flash evaporation feeding bin; step 2: sending the filter cake into steam grinding after flash evaporation, and simultaneously adding an auxiliary agent B into a steam grinding inlet; and step 3: after being ground and crushed by steam, the filter cake is collected by cyclone dust collection and a high-temperature bag filter in turn; and 4, step 4: sending the titanium dioxide finished product collected by the high-temperature bag filter into a heat-insulating bin for heat-insulating treatment; and 5: and (4) slowly reducing the temperature of the titanium dioxide finished product subjected to heat preservation treatment in the step (4) to normal temperature, and then packaging. The invention can reduce dust emission, avoid separation in the use process, has lower volatile matter and improves the coating effect of the titanium dioxide.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a preparation method of titanium dioxide organic composite coating for plastics.
Background
Titanium dioxide is an excellent white pigment and is widely applied to the industries of paint, plastics, papermaking, printing ink and the like, wherein plastics have a larger market as the second large application field of titanium dioxide. The surface treatment of the titanium dioxide comprises inorganic coating and organic coating, wherein the inorganic coating mainly considers the performances of weather resistance, light resistance and the like, and the organic coating mainly considers the compatibility of the titanium dioxide and resin in a downstream application system.
For plastic titanium dioxide, inorganic coatings can be divided into two categories, one is single aluminum coating and is applied to the field which does not require weather resistance, the other is silicon aluminum coating and is applied to the outdoor or other fields which require weather resistance, while organic coatings are single and are basically organosilicon coatings, and the organosilicon coatings have the advantages of excellent temperature resistance, but have the following defects:
1. the surface energy is low, so that titanium dioxide dust is large, and the environment is polluted;
2. silicone coatings mostly use physical adsorption methods rather than chemical bonding, which can cause precipitation during downstream use and affect the strength of the resin.
Aiming at the problems of the organic coating, the invention provides a novel preparation method of the organic composite coating, which can reduce dust emission and enhance the coating effect.
Disclosure of Invention
Aiming at the problems that the titanium dioxide organic coating has larger dust emission and is easy to separate out during the use process to influence the strength of resin in the prior art, the invention provides a preparation method of titanium dioxide organic composite coating for plastics, which aims to: reducing dust emission and enhancing the coating effect of the titanium dioxide.
The technical scheme adopted by the invention is as follows:
1. a preparation method of titanium dioxide organic composite coating for plastics is characterized by comprising the following steps: the method comprises the following steps:
step 1: conveying the qualified filter cake to a flash evaporation feeding bin, and simultaneously adding an auxiliary agent A at the inlet of the flash evaporation feeding bin;
step 2: sending the filter cake into steam grinding after flash evaporation, and simultaneously adding an auxiliary agent B into a steam grinding inlet;
and step 3: the filter cake is ground and crushed by steam and then collected by a cyclone dust collection and high-temperature bag filter in sequence;
and 4, step 4: sending the titanium dioxide finished product collected by the high-temperature bag filter into a heat-insulating bin for heat-insulating treatment;
and 5: and (4) slowly reducing the temperature of the titanium dioxide finished product subjected to heat preservation treatment in the step (4) to normal temperature, and then packaging.
Preferably, the assistant A in the step 1 is a polyalcohol substance, and the addition amount of the assistant A is 0.1-0.2% of the mass of the filter cake.
Preferably, the polyalcohol substances are one or more of trimethylolpropane, trimethylolethane, polyether polyol and polyurethane polyol.
Preferably, the assistant B in the step 2 is a silane coupling agent, and the addition amount of the assistant B is 0.3-0.4% of the mass of the filter cake.
Preferably, the silane coupling agent substance is one or more of amino hydrocarbon silane, epoxy hydrocarbon silane, vinyl triacetoxy silane, aminopropyl trimethoxy silane and propyl methyl dimethoxy silane.
Further preferably, the temperature of the heat-preservation bin in the step 4 is 200-.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the titanium dioxide is coated with a layer of polyol auxiliary agent in a flash evaporation feeding bin to enable the surface of the titanium dioxide to have more hydroxyl groups, and then is coated with a silane coupling agent, wherein the silane coupling agent can be chemically bonded with the hydroxyl groups in the hydrolyzed silanol to form firm chemical bonds, so that the titanium dioxide can show better compatibility when applied in a downstream system, avoids precipitation in the using process, ensures the strength of resin, and has lower volatile matters.
2. In the invention, heat preservation is added after dust collection, and because the steam grinding and crushing time is very short and is usually completed in several seconds, and the chemical bonding of the polyol auxiliary agent and the silane coupling agent requires time, the heat preservation is carried out in a heat preservation bin, so that the reaction effect can be enhanced, and the coating effect of the titanium dioxide is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the attached tables in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The following detailed description of the embodiments of the present application, presented in the accompanying tables, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
Example 1
Conveying the qualified filter cake to a flash evaporation feeding bin through a belt, and simultaneously adding trimethylolpropane with the mass of 0.1% of that of the filter cake into an inlet of the flash evaporation feeding bin; sending the filter cake into steam mill after flash evaporation, and simultaneously adding amino-hydrocarbon silane with the mass of 0.3 percent of the filter cake at the inlet of the steam mill; after being ground and crushed by steam, the filter cake is collected by cyclone dust collection and a high-temperature bag filter in turn; conveying the finished product collected by the high-temperature bag filter into a heat-insulating material bin with the temperature of 200 ℃ for heat insulation for 1 h; and then slowly reducing the temperature of the titanium dioxide finished product to normal temperature, and packaging.
Example 2
Conveying the qualified filter cake to a flash evaporation feeding bin through a belt, and simultaneously adding trimethylolethane with the mass of 0.15% of that of the filter cake into an inlet of the flash evaporation feeding bin; sending the filter cake into steam mill after flash evaporation, and simultaneously adding epoxy hydrocarbon silane with the mass of 0.35 percent of the filter cake at the inlet of the steam mill; the filter cake is ground and crushed by steam and then collected by a cyclone dust collection and high-temperature bag filter in sequence; conveying the finished product collected by the high-temperature bag filter into a heat-insulating material bin with the temperature of 230 ℃ for heat insulation for 1.5 h; and then slowly reducing the temperature of the titanium dioxide finished product to normal temperature, and packaging.
Example 3
Conveying the qualified filter cake to a flash evaporation feeding bin through a belt, and simultaneously adding trimethylolpropane with the mass of 0.2% of that of the filter cake into an inlet of the flash evaporation feeding bin; sending the filter cake into steam mill after flash evaporation, and simultaneously adding alkyl silane with the mass of 0.4 percent of the filter cake into an inlet of the steam mill; the filter cake is ground and crushed by steam and then collected by a cyclone dust collection and high-temperature bag filter in sequence; conveying the finished product collected by the high-temperature bag filter into a heat-insulating material bin with the temperature of 250 ℃ for heat insulation for 2 hours; and then slowly reducing the temperature of the titanium dioxide finished product to normal temperature, and packaging.
Comparative example
Conveying the qualified filter cake to a flash evaporation feeding bin through a belt, feeding the qualified filter cake into a steam powder bin after the flash evaporation is qualified, and adding 0.5% of silicone oil into a steam powder inlet; after steam grinding, cyclone dust collection and a high-temperature bag filter are carried out; cooling and packaging.
The above examples and comparative examples were tested and the results are shown in the following table:
| sample (I) | Dust raising | Volatile matter at 200 deg.C | Workability |
| Example 1 | 0.08g | 0.15％ | Youyou (an instant noodle) |
| Example 2 | 0.07g | 0.16％ | Youyou (an instant noodle) |
| Example 3 | 0.08g | 0.15％ | Superior food |
| Comparative example | 1.78g | 0.30％ | In general |
As can be seen from the table above, compared with the comparative example, the titanium dioxide prepared by adopting the scheme of the invention has the advantages that the dust emission is reduced by more than 50%, and the titanium dioxide is more environment-friendly. And the volatile matter generated at 200 ℃ is reduced by about 50%, and the processability is better.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (6)
1. A preparation method of titanium dioxide organic composite coating for plastics is characterized by comprising the following steps: the method comprises the following steps:
step 1: conveying the qualified filter cake to a flash evaporation feeding bin, and simultaneously adding an auxiliary agent A at the inlet of the flash evaporation feeding bin;
step 2: sending the filter cake into steam grinding after flash evaporation, and simultaneously adding an auxiliary agent B into a steam grinding inlet;
and step 3: the filter cake is ground and crushed by steam and then collected by a cyclone dust collection and high-temperature bag filter in sequence;
and 4, step 4: sending the titanium dioxide finished product collected by the high-temperature bag filter into a heat-insulating bin for heat-insulating treatment;
and 5: and (4) slowly reducing the temperature of the titanium dioxide finished product subjected to heat preservation treatment in the step (4) to normal temperature, and then packaging.
2. The preparation method of the organic composite coating of titanium dioxide for plastics according to claim 1, characterized in that: the auxiliary agent A in the step 1 is a polyalcohol substance, and the addition amount of the auxiliary agent A is 0.1-0.2% of the mass of the filter cake.
3. The preparation method of the organic titanium dioxide composite coating for plastics according to claim 2, which is characterized by comprising the following steps: the polyalcohol substances are one or more of trimethylolpropane, trimethylolethane, polyether polyol and polyurethane polyol.
4. The preparation method of the organic titanium dioxide composite coating for plastics according to claim 1, which is characterized by comprising the following steps: the assistant B in the step 2 is a silane coupling agent substance, and the addition amount of the assistant B is 0.3-0.4% of the mass of the filter cake.
5. The preparation method of the organic titanium dioxide composite coating for plastics according to claim 4, which is characterized by comprising the following steps: the silane coupling agent is one or more of amino-hydrocarbon silane, epoxy-hydrocarbon silane, vinyl triacetoxy silane, aminopropyl trimethoxy silane and propyl methyl dimethoxy silane.
6. The preparation method of the organic titanium dioxide composite coating for plastics according to claim 1, which is characterized by comprising the following steps: the temperature of the heat-preservation bin in the step 4 is 200-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210614315.XA CN114958034A (en) | 2022-05-31 | 2022-05-31 | Preparation method of titanium dioxide organic composite coating for plastics |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210614315.XA CN114958034A (en) | 2022-05-31 | 2022-05-31 | Preparation method of titanium dioxide organic composite coating for plastics |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE31602E (en) * | 1980-07-18 | 1984-06-19 | Kemira Oy | Coated titanium dioxide pigment and a process for the production of the same |
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| CN100999620A (en) * | 2006-12-20 | 2007-07-18 | 中国科学院山西煤炭化学研究所 | Process for coating surface of titanium white powder |
| US20070295244A1 (en) * | 2004-06-24 | 2007-12-27 | Ralf Himmelreich | Titanuim Dioxide Pigments, Process For The Production Thereof,And Resin Compostions Containing The Pigments |
| CN102660154A (en) * | 2012-04-28 | 2012-09-12 | 常州大学 | Surface modification method for nanometer titanium dioxide |
| CN108587243A (en) * | 2018-03-08 | 2018-09-28 | 四川龙蟒钛业股份有限公司 | A kind of production method of high heap density color masterbatch grade titanium dioxide |
| CN108690376A (en) * | 2018-07-10 | 2018-10-23 | 四川龙蟒钛业股份有限公司 | A kind of effective method for reducing titanium dioxide VOC content |
| CN108948799A (en) * | 2018-07-10 | 2018-12-07 | 四川龙蟒钛业股份有限公司 | A kind of production method of top grade color masterbatch grade titanium dioxide |
| CN109853067A (en) * | 2019-03-01 | 2019-06-07 | 华东理工大学 | A kind of preparation method of viscose rayon delustring titanium dioxide |
| CN112646396A (en) * | 2019-10-12 | 2021-04-13 | 攀枝花大互通钛业有限公司 | Color master plastic grade titanium dioxide and preparation method thereof |
| CN114539817A (en) * | 2022-03-11 | 2022-05-27 | 集美精化科技(广西)有限公司 | Preparation method of modified titanium dioxide |
-
2022
- 2022-05-31 CN CN202210614315.XA patent/CN114958034A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE31602E (en) * | 1980-07-18 | 1984-06-19 | Kemira Oy | Coated titanium dioxide pigment and a process for the production of the same |
| CN1411425A (en) * | 1999-12-17 | 2003-04-16 | 石原产业株式会社 | Titanium dioxide pigment and method for production thereof |
| US20070295244A1 (en) * | 2004-06-24 | 2007-12-27 | Ralf Himmelreich | Titanuim Dioxide Pigments, Process For The Production Thereof,And Resin Compostions Containing The Pigments |
| CN100999620A (en) * | 2006-12-20 | 2007-07-18 | 中国科学院山西煤炭化学研究所 | Process for coating surface of titanium white powder |
| CN102660154A (en) * | 2012-04-28 | 2012-09-12 | 常州大学 | Surface modification method for nanometer titanium dioxide |
| CN108587243A (en) * | 2018-03-08 | 2018-09-28 | 四川龙蟒钛业股份有限公司 | A kind of production method of high heap density color masterbatch grade titanium dioxide |
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| CN108948799A (en) * | 2018-07-10 | 2018-12-07 | 四川龙蟒钛业股份有限公司 | A kind of production method of top grade color masterbatch grade titanium dioxide |
| CN109853067A (en) * | 2019-03-01 | 2019-06-07 | 华东理工大学 | A kind of preparation method of viscose rayon delustring titanium dioxide |
| CN112646396A (en) * | 2019-10-12 | 2021-04-13 | 攀枝花大互通钛业有限公司 | Color master plastic grade titanium dioxide and preparation method thereof |
| CN114539817A (en) * | 2022-03-11 | 2022-05-27 | 集美精化科技(广西)有限公司 | Preparation method of modified titanium dioxide |
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