CN106280572B - A method of improving titanium dioxide dispersibility - Google Patents
A method of improving titanium dioxide dispersibility Download PDFInfo
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- CN106280572B CN106280572B CN201610562551.6A CN201610562551A CN106280572B CN 106280572 B CN106280572 B CN 106280572B CN 201610562551 A CN201610562551 A CN 201610562551A CN 106280572 B CN106280572 B CN 106280572B
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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
- C09C1/3607—Titanium dioxide
- C09C1/3615—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C1/3638—Agglomeration, granulation, pelleting
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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
- C09C1/3607—Titanium dioxide
- C09C1/3669—Treatment with low-molecular organic compounds
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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
- C09C1/3607—Titanium dioxide
- C09C1/3684—Treatment with organo-silicon compounds
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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
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C3/045—Agglomeration, granulation, pelleting
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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
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
Abstract
The present invention relates to chemical fields, disclose a kind of method improving titanium dioxide dispersibility, and this method includes：In the presence of dispersant, titanium dioxide is subjected to air-flow crushing at least twice.It is more uniform that the present invention by air-flow crushing at least twice makes dispersant mix with titanium dioxide package, to improve the dispersibility of titanium dioxide, and then the application performance of titanium dioxide is improved, such as covering power, glossiness.
Description
Technical field
The present invention relates to chemical fields, and in particular, to a method of improving titanium dioxide dispersibility.
Background technology
The chemical property of titanium dioxide is stablized, and high refractive index, opacity are high, covering power is high, whiteness is good, and nonhazardous, quilt
It is widely used in the fields such as coating, plastics, papermaking, ink, cosmetics.The prerequisite that these excellent properties are able to show is it
Good dispersion.The only titanium dioxide of good dispersion can just show high tinting strength, tinting power, covering power, glossiness in application process
And the excellent properties such as weatherability.Therefore, the dispersibility of titanium dioxide is to determine one of the key factor of application performance.
Currently, there are two types of the technologies of raising titanium dioxide dispersibility, when, by the way that organic place is added in air-flow crushing
Reason agent (such as organic silicon emulsion or TMP) is wrapped in particle surface, enhances titanium dioxide by electrostatic interaction or steric hindrance effect
Dispersed stability, steam pressure 0.8-1.5MPa；Second is that during the use of titanium dioxide, improved by dispersing apparatus
Its dispersibility, such as high speed dispersor, ultrasonic disperse instrument, sand mill, this method high energy consumption, of high cost, producer is generally reluctant
Meaning is selected.When using first method, titanium dioxide cannot be sufficiently mixed uniformly with organic agent in airslide disintegrating mill, be crushed
The titanium white powder particles of uncoated organic agent are small afterwards, and surface energy is high, and will reunite together, influence dispersibility.Therefore, it is badly in need of
A kind of method that can mix well titanium dioxide with organic agent to improve the dispersibility of titanium dioxide.
Invention content
Present invention aim to address the problems that the titanium dioxide dispersibility using prior art processing is poor, provide one kind and carry
The method of high titanium dioxide dispersibility.
To achieve the goals above, the present invention provides a kind of methods improving titanium dioxide dispersibility, wherein this method packet
It includes：In the presence of dispersant, titanium dioxide is subjected to air-flow crushing at least twice.
In a preferred embodiment, the present invention improves the dispersibility of titanium dioxide using air-flow crushing twice, passes through two
It is more uniform that secondary air-flow crushing makes dispersant mix package with titanium dioxide, to improve the dispersibility of titanium dioxide, and then improves titanium
The application performance of white powder, such as covering power, glossiness.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
The present invention provides a kind of methods improving titanium dioxide dispersibility, wherein this method includes：In the presence of dispersant
Under, titanium dioxide is subjected to air-flow crushing at least twice.
In the present invention, to the steam pressure of each air-flow crushing, there is no particular limitation, as long as dispersant can be made uniform
It is wrapped in the surface of titanium white powder particles, for example, can be 0.5-3MPa, the steam pressure between each secondary air-flow crushing can phase
It is same or different.Under preferable case, titanium dioxide is subjected to air-flow crushing twice and the steam pressure for controlling first time air-flow crushing is
The steam pressure of 0.7-3MPa, second of air-flow crushing are 0.5-2MPa.It is further preferred that the first time air-flow crushing
Steam pressure is 1-2.5MPa, and the steam pressure of second of air-flow crushing is 0.8-1.5MPa.Pressure of the present invention
It is gauge pressure.
In the present invention, the steam pressure of first time air-flow crushing and second of air-flow crushing can have certain difference, excellent
In the case of choosing, the steam pressure height at least 0.5MPa of second of air-flow crushing of vapour pressure ratio of first time air-flow crushing is (preferably
0.5-1MPa).The steam pressure difference of control first time air-flow crushing and second of air-flow crushing within the above range, can make
Dispersant and titanium dioxide mixing package after second of air-flow crushing is more uniform, to enhance the dispersibility of titanium dioxide, in turn
Improve the application performance of product.
In the present invention, to the dosage of the steam in first time air-flow crushing, there is no particular limitation, can be that this field is normal
The selection of rule.Under preferable case, in the first time air-flow crushing, the weight ratio of used steam and the titanium dioxide is
0.5-4.5：1, preferably 1-3.5：1.
In the present invention, to the dosage of the steam in first time air-flow crushing, there is no particular limitation, can be that this field is normal
The selection of rule.Under preferable case, in second of air-flow crushing, the weight ratio of used steam and the titanium dioxide is
0.5-4：1, preferably 0.5-3：1.
In the present invention, to the dosage of the dispersant, there is no particular limitation, as long as uniformly being wrapped on titanium dioxide surface enough
It wraps up in.Under preferable case, the weight ratio of the dispersant and the titanium dioxide is 0.001-0.07：1, preferably 0.003-
0.05：1.
In the present invention, to the selection of the dispersant, there is no particular limitation, can be the selection of this field routine, such as
Can be silane coupling agent, aminomethylation silicone emulsion, sulfomethylation silicone emulsion, aluminate coupling agent, titanate esters idol
Join at least one of agent and polyethers, preferably silane coupling agent and/or aminomethylation silicone emulsion.
In the present invention, the method can also include：Before air-flow crushing, the moisture of titanium dioxide is controlled in 0.05 weight
Measure % or less.Moisture can be controlled by the method for this field routine, such as seasoning.
In the present invention, to the average grain diameter of the titanium dioxide, there is no particular limitation, can be the grain size of this field routine.
Under preferable case, the average grain diameter of the titanium dioxide is 0.3-1.0 μm.The average grain diameter of the titanium dioxide is controlled in above-mentioned model
In enclosing, it can be conducive to make to wrap up ground evenly by dispersant by the broken titanium dioxide of air-flow.Dioxy in the titanium dioxide
The content for changing titanium can be 85-99 weight %.
In the present invention, the embodiment of the air-flow crushing is not selected particularly, can be the choosing of this field routine
It selects, such as can implement in airslide disintegrating mill.
The present invention will be described in detail by way of examples below.
In following embodiment and comparative example, titanium dioxide is purchased from Pan Gangtai industry Co., Ltd, and average grain diameter is 0.8 μ before handling
The content of m, titanium dioxide are 95 weight %.
In following embodiment and comparative example, the dispersibility of titanium dioxide is measured by Hegman grind gage；
Covering power is measured by detecting contrast ratio method, is specifically measured according to below with reference to the method in document：Li Haiyan
Deng, the technique study of spectrophotometer test rutile type titanium white covering power, Chinese powder technology, 2015,4 (21) 21-23.
60 ° of glossiness according to《GB/T 9754-2007 paint and varnish 20 ° of colored paint paint film without metallic pigments,
The measurement of 60 ° and 85 ° bright lusters》It measures.
Embodiment 1
The embodiment is used to illustrate the method for the present invention for improving titanium dioxide dispersibility.
By titanium dioxide and dispersant (aminomethylation silicone emulsion) that water content after drying is 0.04 weight % according to point
Powder weight：Titanium dioxide weight=0.02：Airslide disintegrating mill is added in 1 ratio, is passed through steam, steam pressure 2.5MPa,
The weight ratio of steam and titanium dioxide is 3.5：First time air-flow crushing is carried out under conditions of 1.By the object after first time air-flow crushing
Airslide disintegrating mill is added in material again, is passed through steam, and steam pressure 1.5MPa is 3 in the weight ratio of steam and titanium dioxide：1
Under the conditions of carry out second of air-flow crushing, obtain final titanium dioxide product.The dispersibility for detecting titanium dioxide is 7.0, in propylene
Covering power in sour coating (pigment volume concentration (PVC) 20%) is 90.3%, and 60 ° of glossiness are 80.
Embodiment 2
The embodiment is used to illustrate the method for the present invention for improving titanium dioxide dispersibility.
By titanium dioxide and dispersant (silane coupling agent) that water content after drying is 0.03 weight % according to dispersant weight：
Titanium dioxide weight=0.003：Airslide disintegrating mill is added in 1 ratio, is passed through steam, steam pressure 1.0MPa, in steam and titanium
The weight ratio of white powder is 1：First time air-flow crushing is carried out under conditions of 1.Material after first time air-flow crushing is added again
Airslide disintegrating mill, is passed through steam, and steam pressure 0.5MPa is 3 in the weight ratio of steam and titanium dioxide：It is carried out under conditions of 1
Second of air-flow crushing obtains final titanium dioxide product.The dispersibility for detecting titanium dioxide is 6.75, in acrylic coating (face
Material volumetric concentration be 20%) in covering power be 89.5%, 60 ° of glossiness are 78.
Embodiment 3
The embodiment is used to illustrate the method for the present invention for improving titanium dioxide dispersibility.
By titanium dioxide and dispersant (aluminate coupling agent) that water content after drying is 0.05 weight % according to dispersant weight
Amount：Titanium dioxide weight=0.01: airslide disintegrating mill is added in 1 ratio, is passed through steam, steam pressure 1.8MPa, steam with
The weight ratio of titanium dioxide is 2.1：First time air-flow crushing is carried out under 1 ratio.Again by the material after first time air-flow crushing
Airslide disintegrating mill is added, is passed through steam, steam pressure 1.0MPa is 2 in the weight ratio of steam and titanium dioxide：Under conditions of 1
Second of air-flow crushing is carried out, final titanium dioxide product is obtained.The dispersibility for detecting titanium dioxide is 6.75, in acrylic coating
Covering power in (pigment volume concentration (PVC) 20%) is 89.3%, and 60 ° of glossiness are 77.
Embodiment 4
The embodiment is used to illustrate the method for the present invention for improving titanium dioxide dispersibility.
By titanium dioxide and dispersant (titanate coupling agent) that water content after drying is 0.03 weight % according to dispersant weight
Amount：Titanium dioxide weight=0.05：Airslide disintegrating mill is added in 1 ratio, is passed through steam, steam pressure 2.0MPa, steam with
The weight ratio of titanium dioxide is 3：First time air-flow crushing is carried out under conditions of 1.Material after first time air-flow crushing is added again
Enter airslide disintegrating mill, be passed through steam, steam pressure 1.0MPa is 0.5 in the weight ratio of steam and titanium dioxide：Under conditions of 1
Second of air-flow crushing is carried out, final titanium dioxide product is obtained.The dispersibility for detecting titanium dioxide is 6.75, in acrylic coating
Covering power in (pigment volume concentration (PVC) 20%) is 89.1%, and 60 ° of glossiness are 76.
Embodiment 5
The embodiment is used to illustrate that the steam pressure of first time air-flow crushing to be less than the steam pressure of second of air-flow crushing
When titanium dioxide dispersibility.
Titanium dioxide is handled according to the method for embodiment 2, unlike, the steam pressure of first time air-flow crushing is
The steam pressure of 0.7MPa, second of air-flow crushing are 1MPa.The dispersibility for detecting titanium dioxide is 6.50, in acrylic coating
Covering power in (pigment volume concentration (PVC) 20%) is 89.0%, and 60 ° of glossiness are 75.
Embodiment 6
The steam pressure of steam pressure and second air-flow crushing of the embodiment for illustrating first time air-flow crushing
Difference not in the preferred range when titanium dioxide dispersibility.
Titanium dioxide is handled according to the method for embodiment 1, unlike, the steam pressure of first time air-flow crushing is 3MPa,
The steam pressure of second of air-flow crushing is 0.5MPa.The dispersibility for detecting titanium dioxide is 6.65, in acrylic coating (pigment body
Product it is a concentration of 20%) in covering power be 89.1%, 60 ° of glossiness are 75.
Embodiment 7
The titanium dioxide when embodiment is used to illustrate the steam pressure of second of air-flow crushing not in range of the present invention
Dispersibility.
Titanium dioxide is handled according to the method for embodiment 2, unlike, the steam pressure of second of air-flow crushing is
0.2MPa.The dispersibility for detecting titanium dioxide is 6.25, and the covering power in acrylic coating (pigment volume concentration (PVC) 20%) is
87.3%, 60 ° of glossiness are 72.
Comparative example 1
The comparative example is used to illustrate only to carry out the dispersibility of the titanium dioxide of an air-flow crushing.
By titanium dioxide and dispersant (aminomethylation silicone emulsion) that water content after drying is 0.04 weight % according to point
Powder weight：Titanium dioxide weight=0.02：Airslide disintegrating mill is added in 1 ratio, is passed through steam, steam pressure 3MPa is steaming
The weight ratio of vapour and titanium dioxide is 3.5：Air-flow crushing is carried out under conditions of 1.The dispersibility for detecting titanium dioxide is 6.0, in propylene
Covering power in sour coating (pigment volume concentration (PVC) 20%) is 83.5%, and 60 ° of glossiness are 68.
Even if comparing comparative example 1 and embodiment 1 if as can be seen that improving the steam pressure of single treatment can not effectively carry
The dispersibility of high titanium dioxide；And the method for the invention is used to carry out multiple air-flow crushing to titanium dioxide, preferably air-flow twice
It crushes, the dispersibility of titanium dioxide can be effectively improved, and then improve the application performance of titanium dioxide, such as covering power, glossiness.
Particularly, comparing embodiment 2 can be seen that the steam pressure of first time air-flow crushing higher than second with embodiment 5
The dispersion performance of titanium dioxide is more preferable when the steam pressure of secondary air-flow crushing；Comparing embodiment 1 is with embodiment 6 as can be seen that first
The titanium white when difference of the steam pressure of the steam pressure of secondary air-flow crushing and second of air-flow crushing is in range of the present invention
The dispersibility of powder is more preferable；Comparing embodiment 2 and embodiment 7, the steam pressure of second of air-flow crushing is in range of the present invention
The dispersibility of titanium dioxide is more preferable when interior.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail can carry out a variety of simple variants to technical scheme of the present invention within the scope of the technical concept of the present invention, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of method improving titanium dioxide dispersibility, which is characterized in that this method includes：In the presence of dispersant, by titanium
White powder carries out air-flow crushing at least twice；
Wherein, the steam pressure of the first time air-flow crushing is 1-2.5MPa, the steam pressure of second of air-flow crushing
For 0.8-1.5MPa；
Wherein, the high 0.5-1 MPa of the steam pressure of second of air-flow crushing of the vapour pressure ratio of first time air-flow crushing；
Wherein, the dispersant is silane coupling agent, aminomethylation silicone emulsion, sulfomethylation silicone emulsion, Aluminate
At least one of coupling agent, titanate coupling agent and polyethers.
2. according to the method described in claim 1, wherein, in the first time air-flow crushing, used steam with it is described
The weight ratio of titanium dioxide is 0.5-4.5：1.
3. according to the method described in claim 2, wherein, in the first time air-flow crushing, used steam with it is described
The weight ratio of titanium dioxide is 1-3.5：1.
4. according to the method described in claim 1, wherein, in second of air-flow crushing, used steam with it is described
The weight ratio of titanium dioxide is 0.5-4：1.
5. according to the method described in claim 4, wherein, in second of air-flow crushing, used steam with it is described
The weight ratio of titanium dioxide is 0.5-3：1.
6. according to the method described in claim 1, wherein, the weight ratio of the dispersant and the titanium dioxide is 0.001-
0.07：1.
7. according to the method described in claim 6, wherein, the weight ratio of the dispersant and the titanium dioxide is 0.003-
0.05：1.
8. according to the method described in claim 1, wherein, the dispersant is silane coupling agent and/or aminomethylation siloxanes
Lotion.
9. according to the method described in claim 1, wherein, the method further includes：Before air-flow crushing, the moisture of titanium dioxide is controlled
Content is below 0.05 weight %.
10. the method according to claim 1 or 9, wherein the average grain diameter of the titanium dioxide is 0.3-1 μm.
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|---|---|---|---|---|
| CN103044972A (en) * | 2013-01-07 | 2013-04-17 | 道奇威（成都）科技有限公司 | Organic surface modification method for improving hydrophobicity of anatase titanium dioxide |
| CN103131212A (en) * | 2013-02-28 | 2013-06-05 | 江苏镇钛化工有限公司 | Preparation method of special titanium dioxide for oily system |
| CN103305033A (en) * | 2013-06-28 | 2013-09-18 | 江西添光化工有限责任公司 | Surface treatment enveloping process of rutile titanium dioxide |
| CN104356692A (en) * | 2014-09-23 | 2015-02-18 | 安徽金星钛白（集团）有限公司 | Preparation method of high-fluidity TiO2 and organic surface treatment mechanism thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103044972A (en) * | 2013-01-07 | 2013-04-17 | 道奇威（成都）科技有限公司 | Organic surface modification method for improving hydrophobicity of anatase titanium dioxide |
| CN103131212A (en) * | 2013-02-28 | 2013-06-05 | 江苏镇钛化工有限公司 | Preparation method of special titanium dioxide for oily system |
| CN103305033A (en) * | 2013-06-28 | 2013-09-18 | 江西添光化工有限责任公司 | Surface treatment enveloping process of rutile titanium dioxide |
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Address after: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee after: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Address before: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee before: CHENGDU ADVANCED METAL MATERIAL INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |