阅读说明：本技术 一种二氧化钛有机包膜制备工艺 (Titanium dioxide organic coating preparation process ) 是由 耿志武 于 2020-05-07 设计创作，主要内容包括：本发明公开了一种二氧化钛有机包膜制备工艺,涉及二氧化钛包膜工艺技术领域；包括如下步骤：配料,将各种原辅材料按比例分别称重配齐；混合搅拌,混合后的原辅材料放入搅拌设备搅拌,搅拌后的物料作为混合物Ⅰ；开启包膜机,预热温度达到60-65摄氏度时将搅拌好的混合物Ⅰ连续加入进入包膜机进行包覆；二次搅拌,包膜好的钛白粉进入搅拌设备进行第二次搅拌并加入聚丙烯酸钠、六偏磷酸钠,加入过程中将白油定量滴加到混合物料中,搅拌时间为5-15分钟；强力分散；成品放料。本发明通过将混合直接采用搅拌设备进行搅拌,并且在包膜步骤前后均进行搅拌,在保证其混合充分的条件下,大大降低了二氧化钛包膜的成本。(The invention discloses a titanium dioxide organic coating preparation process, and relates to the technical field of titanium dioxide coating processes; the method comprises the following steps: proportioning, namely weighing and matching various raw and auxiliary materials respectively according to a proportion; mixing and stirring, putting the mixed raw and auxiliary materials into stirring equipment for stirring, and taking the stirred material as a mixture I; starting a film coating machine, and continuously adding the stirred mixture I into the film coating machine for coating when the preheating temperature reaches 60-65 ℃; stirring for the second time, namely feeding the coated titanium dioxide into stirring equipment for stirring for the second time, adding sodium polyacrylate and sodium hexametaphosphate, and dropwise adding the white oil into the mixed material in a quantitative manner in the adding process for 5-15 minutes; strongly dispersing; discharging the finished product. According to the invention, the mixing is directly stirred by adopting stirring equipment, and the stirring is carried out before and after the coating step, so that the cost of titanium dioxide coating is greatly reduced under the condition of ensuring the full mixing.)

1. A preparation process of titanium dioxide organic coating is characterized by comprising the following steps:

s1: proportioning, namely weighing and matching various raw and auxiliary materials respectively according to a proportion;

s2: mixing and stirring, putting the mixed raw and auxiliary materials into stirring equipment for stirring, and taking the stirred material as a mixture I;

s3: starting a film coating machine, and continuously adding the stirred mixture I into the film coating machine for coating when the preheating temperature reaches 60-65 ℃;

s4: stirring for the second time, namely feeding the coated titanium dioxide into stirring equipment for stirring for the second time, adding sodium polyacrylate and sodium hexametaphosphate, and dropwise adding the white oil into the mixed material in a quantitative manner in the adding process for 5-15 minutes;

s5: strongly dispersing, namely, after stirring, continuously feeding the materials into a strong dispersion machine for strongly dispersing to obtain a finished product;

s6: and (4) discharging finished products, and packaging the prepared finished products as required and placing the packaged finished products at a set position.

2. The process for preparing titanium dioxide organic coating according to claim 1, wherein in S2, the mixing and stirring method of anatase type F coated titanium dioxide and rutile type coated titanium dioxide comprises: adding a certain amount of kaolin and stone powder into a mixing and stirring device, starting the stirring device, quantitatively dripping a coupling agent into the titanium dioxide, stirring for 5-15 minutes, adding a certain amount of titanium dioxide, stirring for 5-15 minutes, then sequentially adding the talc powder, the zinc stearate and the whitening agent, and stirring for 5-15 minutes.

3. The preparation process of the titanium dioxide organic coating according to claim 1, wherein in S2, the mixing and stirring method of the anatase type E coating titanium dioxide comprises the following steps: adding a certain amount of kaolin and lithopone into a mixing and stirring device, starting the stirring device, quantitatively dripping a coupling agent into the titanium dioxide, stirring for 5-15 minutes, adding a certain amount of titanium dioxide, stirring for 5-15 minutes, then sequentially adding talcum powder and zinc stearate, and stirring for 5-15 minutes.

4. The process for preparing titanium dioxide organic coating according to claim 1, wherein in S2, the mixing and stirring method of anatase type F coated titanium dioxide and rutile type coated titanium dioxide comprises: adding a certain amount of kaolin and stone powder into mixing and stirring equipment, starting the stirring equipment, quantitatively dripping the coupling agent into the titanium dioxide, stirring for 10 minutes, adding a certain amount of titanium dioxide, stirring for 10 minutes, then sequentially adding talcum powder, zinc stearate and a whitening agent, and stirring for 10 minutes.

5. The preparation process of the titanium dioxide organic coating according to claim 1, wherein in S2, the mixing and stirring method of the anatase type E coating titanium dioxide comprises the following steps: adding a certain amount of kaolin and lithopone into a mixing and stirring device, starting the stirring device, quantitatively dripping a coupling agent into the titanium dioxide, stirring for 10 minutes, adding a certain amount of titanium dioxide, stirring for 10 minutes, then sequentially adding talcum powder and zinc stearate, and stirring for 10 minutes.

6. The preparation process of the titanium dioxide organic coating film according to claim 1, wherein the stirring equipment in S2 and S4 comprises a tank body (1), a top cover (2) is fixed on the outer wall of the top of the tank body (1) through bolts, a stirring device is arranged inside the tank body (1), a transmission device is arranged on the outer wall of the top cover (2), a feeding port (4) is formed in the inner wall of the top cover (2), and a blocking cover (3) is hinged to the outer wall, close to the feeding port (4), of the top cover (2).

7. The preparation process of the titanium dioxide organic coating film according to claim 6, wherein the transmission device comprises a first gear (7), a second gear (8), a first belt pulley (10) and a second belt pulley (13), the inner wall of the top cover (2) is respectively and rotatably connected with a driving shaft (6), a reversing shaft (11) and a driven shaft (14), and the inner wall of the second gear (8) is sleeved on the outer wall of the driving shaft (6).

8. The preparation process of the titanium dioxide organic coating film according to claim 7, wherein the inner walls of the first belt wheel (10) and the first gear (7) are sleeved on the outer wall of the reversing shaft (11), the second belt wheel (13) is sleeved on the outer wall of the driven shaft (14), the first gear (7) and the stirring motor (9) are meshed with each other, and the outer walls of the first belt wheel (10) and the second belt wheel (13) are matched with the same belt (12).

9. The preparation process of the titanium dioxide organic coating film according to claim 8, wherein the top outer wall of the top cover (2) is fixed with a motor support (5) through bolts, the top outer wall of the driving shaft (6) is rotatably connected to the inner wall of the motor support (5), the top outer wall of the driving shaft (6) is connected with a stirring motor (9) through a coupling, and the bottom outer wall of the stirring motor (9) is fixed on the top outer wall of the motor support (5) through bolts.

10. The preparation process of the titanium dioxide organic coating film according to claim 6, wherein the stirring device comprises three first stirring blades (15) and two second stirring blades (16) which are equidistantly arranged, the inner walls of the three first stirring blades (15) are all sleeved on the outer wall of the driven shaft (14), the inner walls of the two second stirring blades (16) are all sleeved on the outer wall of the driving shaft (6), the minimum distance between the driving shaft (6) and the driven shaft (14) is slightly larger than the length of a single first stirring blade (15), and the two second stirring blades (16) and the three first stirring blades (15) are staggered.

Technical Field

The invention relates to the technical field of titanium dioxide coating processes, in particular to a titanium dioxide organic coating preparation process.

Background

Titanium dioxide, commonly known as titanium dioxide, is widely applied to the industries of coatings, paints, plastics, paper making, cosmetics and medicines, in the production process, according to the requirements of direct customers, professional requirements are provided for the application of weather resistance, dispersibility, covering power and the like of the titanium dioxide, inorganic coating and organic coating are required, the main function of the inorganic coating is to improve the weather resistance and chemical stability of the titanium dioxide, and the organic surface treatment can improve the wettability, dispersibility and rheological property of the titanium dioxide in various dispersion media.

Through search, Chinese publication No. CN110655808A discloses an organic coating processing method of titanium dioxide, comprising the following steps: performing steam powder treatment on titanium dioxide by a steam powder machine to obtain titanium dioxide fine powder, and then feeding the titanium dioxide fine powder into a conveying ascending pipeline from a discharge port of the steam powder machine; after the organic coating agent in the organic silicon material tank is atomized by an atomizing spray gun, the organic coating agent is sprayed into a conveying ascending pipe through an organic agent inlet by a nozzle of the atomizing spray gun, the titanium dioxide organic agent after vapor powder treatment is coated in the conveying ascending pipe, the total adding amount of the organic agent accounts for 0.4 percent of the weight of the titanium dioxide, and the adding speed is controlled to be 0.01m 3/h-0.013 m 3/h; the pressure of the atomizing spray gun is controlled to be 0.3-0.5 Mpa, the titanium dioxide is sent to a vapor-powder bag filter for gas separation, and the titanium dioxide after organic coating is sent to a finished product bin from the bottom outlet of the vapor-powder bag filter.

According to the scheme, the atomization spray gun is directly adopted to spray the organic agent, and then the organic agent is contacted with the titanium dioxide treated by the gas powder to carry out organic coating, the atomization spraying equipment and the gas powder treatment equipment which are required to be used both need higher precision, the equipment price is too high, and the coating cost of the titanium dioxide is directly higher.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a preparation process of a titanium dioxide organic coating.

In order to achieve the purpose, the invention adopts the following technical scheme:

a preparation process of titanium dioxide organic coating comprises the following steps:

s1: proportioning, namely weighing and matching various raw and auxiliary materials respectively according to a proportion;

s2: mixing and stirring, putting the mixed raw and auxiliary materials into stirring equipment for stirring, and taking the stirred material as a mixture I;

s3: starting a film coating machine, and continuously adding the stirred mixture I into the film coating machine for coating when the preheating temperature reaches 60-65 ℃;

s4: stirring for the second time, namely feeding the coated titanium dioxide into stirring equipment for stirring for the second time, adding sodium polyacrylate and sodium hexametaphosphate, and dropwise adding the white oil into the mixed material in a quantitative manner in the adding process for 5-15 minutes;

s5: strongly dispersing, namely, after stirring, continuously feeding the materials into a strong dispersion machine for strongly dispersing to obtain a finished product;

s6: and (4) discharging finished products, and packaging the prepared finished products as required and placing the packaged finished products at a set position.

Preferably: in the S2, the mixing and stirring method of the anatase type F coated titanium dioxide and the rutile type coated titanium dioxide comprises the following steps: adding a certain amount of kaolin and stone powder into a mixing and stirring device, starting the stirring device, quantitatively dripping a coupling agent into the titanium dioxide, stirring for 5-15 minutes, adding a certain amount of titanium dioxide, stirring for 5-15 minutes, then sequentially adding the talc powder, the zinc stearate and the whitening agent, and stirring for 5-15 minutes.

Preferably: in the S2, the mixing and stirring method of the anatase type E coated titanium dioxide comprises the following steps: adding a certain amount of kaolin and lithopone into a mixing and stirring device, starting the stirring device, quantitatively dripping a coupling agent into the titanium dioxide, stirring for 5-15 minutes, adding a certain amount of titanium dioxide, stirring for 5-15 minutes, then sequentially adding talcum powder and zinc stearate, and stirring for 5-15 minutes.

Preferably: in the S2, the mixing and stirring method of the anatase type F coated titanium dioxide and the rutile type coated titanium dioxide comprises the following steps: adding a certain amount of kaolin and stone powder into mixing and stirring equipment, starting the stirring equipment, quantitatively dripping the coupling agent into the titanium dioxide, stirring for 10 minutes, adding a certain amount of titanium dioxide, stirring for 10 minutes, then sequentially adding talcum powder, zinc stearate and a whitening agent, and stirring for 10 minutes.

Preferably: in the S2, the mixing and stirring method of the anatase type E coated titanium dioxide comprises the following steps: adding a certain amount of kaolin and lithopone into a mixing and stirring device, starting the stirring device, quantitatively dripping a coupling agent into the titanium dioxide, stirring for 10 minutes, adding a certain amount of titanium dioxide, stirring for 10 minutes, then sequentially adding talcum powder and zinc stearate, and stirring for 10 minutes.

Preferably: the stirring equipment in S2 and S4 comprises a tank body, wherein a top cover is fixed on the outer wall of the top of the tank body through bolts, a stirring device is arranged in the tank body, a transmission device is arranged on the outer wall of the top cover, a feeding port is formed in the inner wall of the top cover, and a blocking cover is hinged to the outer wall, close to the feeding port, of the top cover.

Preferably: the transmission device comprises a first gear, a second gear, a first belt wheel and a second belt wheel, the inner wall of the top cover is respectively and rotatably connected with a driving shaft, a reversing shaft and a driven shaft, and the inner wall of the second gear is sleeved on the outer wall of the driving shaft.

Preferably: the inner walls of the first belt wheel and the first gear are sleeved on the outer wall of the reversing shaft, the second belt wheel is sleeved on the outer wall of the driven shaft, the first gear is meshed with the stirring motor, and the outer walls of the first belt wheel and the second belt wheel are matched with the same belt.

Preferably: the top outer wall of top cap has the motor support through the bolt fastening, and the top outer wall of driving shaft rotates to be connected on the inner wall of motor support, and the top outer wall of driving shaft has agitator motor through the coupling joint, and agitator motor's bottom outer wall passes through the bolt fastening on the top outer wall of motor support.

Preferably: agitating unit includes three first stirring vane and two second stirring vane that the equidistance was arranged, and three first stirring vane's inner wall all cup joints on the outer wall of driven shaft, and two second stirring vane's inner wall all cup joints on the outer wall of driving shaft, the minimum distance of driving shaft and driven shaft slightly is greater than single first stirring vane's length, two second stirring vane and three first stirring vane staggered arrangement.

The invention has the beneficial effects that:

1. according to the invention, the mixing is directly stirred by adopting stirring equipment, and the stirring is carried out before and after the coating step, so that the cost of titanium dioxide coating is greatly reduced under the condition of ensuring the full mixing.

2. According to the invention, the stirring device and the transmission device are arranged in the stirring equipment, when the first stirring blade or the second stirring blade is seen independently, the raw and auxiliary materials in the tank body can be driven to form independent rotational flow by rotation of the first stirring blade or the second stirring blade, and the independent rotational flow condition can be broken through by the staggered arrangement of the first stirring blade and the second stirring blade, so that the two rotational flows are disordered at any time, the full mixing of the raw and auxiliary materials is ensured, and the stirring efficiency is improved.

Drawings

FIG. 1 is a process flow chart of a process for preparing a titanium dioxide organic coating film according to the invention;

FIG. 2 is a schematic structural diagram of a stirring device used in a titanium dioxide organic coating preparation process provided by the invention;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

in the figure: 1-tank body, 2-top cover, 3-blocking cover, 4-feeding port, 5-motor support, 6-driving shaft, 7-first gear, 8-second gear, 9-stirring motor, 10-first belt wheel, 11-reversing shaft, 12-belt, 13-second belt wheel, 14-driven shaft, 15-first stirring blade and 16-second stirring blade.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.