CN106280572A - A kind of method improving titanium dioxide dispersibility - Google Patents
A kind of method improving titanium dioxide dispersibility Download PDFInfo
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- CN106280572A CN106280572A CN201610562551.6A CN201610562551A CN106280572A CN 106280572 A CN106280572 A CN 106280572A CN 201610562551 A CN201610562551 A CN 201610562551A CN 106280572 A CN106280572 A CN 106280572A
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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
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- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The present invention relates to chemical field, disclose a kind of method improving titanium dioxide dispersibility, the method includes: in the presence of dispersant, and titanium dioxide is carried out comminution by gas stream at least twice.It is more uniform that the present invention makes dispersant mix parcel with titanium dioxide by comminution by gas stream at least twice, thus improves the dispersibility of titanium dioxide, and then improves the application performance of titanium dioxide, such as covering power, glossiness.
Description
Technical field
The present invention relates to chemical field, in particular it relates to a kind of method improving titanium dioxide dispersibility.
Background technology
The stable chemical nature of titanium dioxide, refractive index is high, opacity is 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 shown is it
Good dispersion.The only titanium dioxide of good dispersion, just can 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 one of key factor determining application performance.
At present, the Technology improving titanium dioxide dispersibility has two kinds, and one is, by adding organic place when comminution by gas stream
Reason agent (such as organic silicon emulsion or TMP) is wrapped in particle surface, strengthens titanium dioxide by electrostatic interaction or sterically hindered effect
Dispersibility stability, steam pressure is 0.8-1.5MPa；Two are, during the use of titanium dioxide, are improved by dispersing apparatus
Its dispersibility, such as high speed dispersor, ultrasonic disperse instrument, sand mill etc., this method energy consumption is high, and cost is high, and producer is typically reluctant
Meaning is selected.When using first method, titanium dioxide and organic agent can not be sufficiently mixed uniformly in jet mill, broken
The titanium dioxide granule of rear uncoated organic agent is little, and surface can be high, will reunite together again, and affect dispersibility.Therefore, it is badly in need of
A kind of method that can fully mix titanium dioxide and organic agent thus improve the dispersibility of titanium dioxide.
Summary of the invention
Present invention aim to address the problem that the titanium dioxide dispersibility using prior art to process is poor, it is provided that Yi Zhongti
The method of high titanium dioxide dispersibility.
To achieve these goals, the invention provides a kind of method improving titanium dioxide dispersibility, wherein, the method bag
Include: in the presence of dispersant, titanium dioxide is carried out comminution by gas stream at least twice.
In a preferred embodiment, the present invention use twice comminution by gas stream to improve the dispersibility of titanium dioxide, by two
It is more uniform that secondary comminution by gas stream makes dispersant mix parcel with titanium dioxide, thus improves the dispersibility of titanium dioxide, and then improves titanium
The application performance of white lead, such as covering power, glossiness etc..
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Detailed description of the invention
Hereinafter the detailed description of the invention of the present invention is described in detail.It should be appreciated that described herein specifically
Embodiment is merely to illustrate and explains the present invention, is not limited to the present invention.
The end points of scope disclosed in this article and any value are not limited to this accurate scope or value, these scopes or
Value should be understood to the value comprised close to these scopes or value.For numerical range, between the endpoint value of each scope, respectively
Between endpoint value and the single point value of individual scope, and can obtain one or more between single point value with combination with one another
New numerical range, these numerical rangies should be considered the most specifically to disclose.
The invention provides a kind of method improving titanium dioxide dispersibility, wherein, the method includes: in the existence of dispersant
Under, titanium dioxide is carried out comminution by gas stream at least twice.
In the present invention, to the steam pressure of each comminution by gas stream, there is no particular limitation, as long as dispersant can be made uniform
Being wrapped in the surface of titanium dioxide granule, for example, it is possible to be 0.5-3MPa, the steam pressure between each comminution by gas stream can phase
Same or different.Under preferable case, titanium dioxide is carried out twice comminution by gas stream and controls the steam pressure of for the first time comminution by gas stream and be
0.7-3MPa, the steam pressure of comminution by gas stream is 0.5-2MPa for the second time.It is further preferred that described first time comminution by gas stream
Steam pressure is 1-2.5MPa, and the steam pressure of described second time comminution by gas stream is 0.8-1.5MPa.The pressure that the present invention relates to
It is gauge pressure.
In the present invention, the steam pressure of comminution by gas stream and second time comminution by gas stream can have certain difference for the first time, excellent
In the case of choosing, the steam pressure height at least 0.5MPa of the vapour pressure ratio second time comminution by gas stream of comminution by gas stream is (preferably for the first time
0.5-1MPa).Control the steam pressure difference of comminution by gas stream and second time comminution by gas stream for the first time within the above range, can make
Dispersant and titanium dioxide mixing parcel after comminution by gas stream are more uniform for the second time, thus strengthen the dispersibility of titanium dioxide, and then
Improve the application performance of product.
In the present invention, to the consumption of the steam in first time comminution by gas stream, there is no particular limitation, can be that this area is normal
The selection of rule.Under preferable case, in described first time comminution by gas stream, the steam used with the weight ratio of described titanium dioxide is
0.5-4.5:1, preferably 1-3.5:1.
In the present invention, to the consumption of the steam in first time comminution by gas stream, there is no particular limitation, can be that this area is normal
The selection of rule.Under preferable case, in described second time comminution by gas stream, the steam used with the weight ratio of described titanium dioxide is
0.5-4:1, preferably 0.5-3:1.
In the present invention, to the consumption of described dispersant, there is no particular limitation, as long as enough uniformly wrapping on titanium dioxide surface
Wrap up in.Under preferable case, described dispersant is 0.001-0.07:1, preferably 0.003-with the weight ratio of described titanium dioxide
0.05:1.
In the present invention, to the selection of described dispersant, there is no particular limitation, can be the conventional selection in this area, such as
Can be silane coupler, aminomethylation silicone emulsion, sulfomethylation silicone emulsion, aluminate coupling agent, titanate esters idol
At least one in connection agent and polyethers, preferably silane coupler and/or aminomethylation silicone emulsion.
In the present invention, described method can also include: before comminution by gas stream, controls the moisture of titanium dioxide at 0.05 weight
Amount below %.Moisture can be controlled by the method that this area is conventional, such as seasoning.
In the present invention, to the mean diameter of described titanium dioxide, there is no particular limitation, can be the conventional particle diameter in this area.
Under preferable case, the mean diameter of described titanium dioxide is 0.3-1.0 μm.The mean diameter of described titanium dioxide is controlled at above-mentioned model
In enclosing, can be conducive to making the titanium dioxide after airflow crash by dispersant parcel ground evenly.Dioxy in described titanium dioxide
The content changing titanium can be 85-99 weight %.
In the present invention, the embodiment of described comminution by gas stream is the most particularly selected, can be the choosing of this area routine
Select, such as, can implement in jet mill.
Hereinafter will be described the present invention by embodiment.
In following example and comparative example, titanium dioxide is purchased from Pan Gangtai industry company limited, and before processing, mean diameter is 0.8 μ
M, the content of titanium dioxide is 95 weight %.
In following example and comparative example, the dispersibility of titanium dioxide is recorded by Hegman grind gage；
Covering power is recorded by detection contrast ratio method, specifically records according to below with reference to the method in document: Li Haiyan
Deng, the technique study of spectrophotometer test Rutile type titanium dioxide covering power, China's powder technology, 2015,4 (21) 21-23.
60 ° of glossiness according to " 20 ° of the GB/T 9754-2007 paint and varnish colored paint paint film without metallic pigments,
The mensuration of 60 ° and 85 ° bright lusters " record.
Embodiment 1
This embodiment is for the method that raising titanium dioxide dispersibility of the present invention is described.
By titanium dioxide that dried water content is 0.04 weight % and dispersant (aminomethylation silicone emulsion) according to point
Powder weight: the ratio of titanium dioxide weight=0.02:1 adds jet mill, is passed through steam, and steam pressure is 2.5MPa,
The weight ratio of steam and titanium dioxide is to carry out comminution by gas stream for the first time under conditions of 3.5:1.By the thing after first time comminution by gas stream
Material adds jet mill again, is passed through steam, and steam pressure is 1.5MPa, and the weight ratio at steam Yu titanium dioxide is 3:1's
Under the conditions of carry out second time comminution by gas stream, obtain final titanium dioxide product.The dispersibility of detection titanium dioxide is 7.0, at propylene
Covering power in acid coating (pigment volume concentration (PVC) is 20%) is 90.3%, and 60 ° of glossiness are 80.
Embodiment 2
This embodiment is for the method that raising titanium dioxide dispersibility of the present invention is described.
By titanium dioxide that dried water content is 0.03 weight % with dispersant (silane coupler) according to dispersant weight:
The ratio of titanium dioxide weight=0.003:1 adds jet mill, is passed through steam, and steam pressure is 1.0MPa, at steam and titanium
The weight ratio of white lead is to carry out comminution by gas stream for the first time under conditions of 1:1.Material after first time comminution by gas stream is added again
Jet mill, is passed through steam, and steam pressure is 0.5MPa, carries out under conditions of the weight ratio of steam with titanium dioxide is 3:1
Comminution by gas stream for the second time, obtains final titanium dioxide product.The dispersibility of detection 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
This embodiment is for the method that raising titanium dioxide dispersibility of the present invention is described.
By titanium dioxide that dried water content is 0.05 weight % with dispersant (aluminate coupling agent) according to dispersant weight
Amount: titanium dioxide weight=0.01: the ratio of 1 adds jet mill, is passed through steam, and steam pressure is 1.8MPa, steam with
The weight ratio of titanium dioxide be 2.1:1 ratio under carry out for the first time comminution by gas stream.By the material after first time comminution by gas stream again
Adding jet mill, be passed through steam, steam pressure is 1.0MPa, under conditions of the weight ratio of steam Yu titanium dioxide is 2:1
Carry out second time comminution by gas stream, obtain final titanium dioxide product.The dispersibility of detection titanium dioxide is 6.75, at acrylic coating
Covering power in (pigment volume concentration (PVC) is 20%) is 89.3%, and 60 ° of glossiness are 77.
Embodiment 4
This embodiment is for the method that raising titanium dioxide dispersibility of the present invention is described.
By titanium dioxide that dried water content is 0.03 weight % with dispersant (titanate coupling agent) according to dispersant weight
Amount: the ratio of titanium dioxide weight=0.05:1 adds jet mill, is passed through steam, and steam pressure is 2.0MPa, steam with
The weight ratio of titanium dioxide is to carry out comminution by gas stream for the first time under conditions of 3:1.Material after first time comminution by gas stream is added again
Entering jet mill, be passed through steam, steam pressure is 1.0MPa, under conditions of the weight ratio of steam Yu titanium dioxide is 0.5:1
Carry out second time comminution by gas stream, obtain final titanium dioxide product.The dispersibility of detection titanium dioxide is 6.75, at acrylic coating
Covering power in (pigment volume concentration (PVC) is 20%) is 89.1%, and 60 ° of glossiness are 76.
Embodiment 5
This embodiment is for illustrating the steam pressure steam pressure less than second time comminution by gas stream of comminution by gas stream for the first time
Time titanium dioxide dispersibility.
Processing titanium dioxide according to the method for embodiment 2, except for the difference that, the steam pressure of comminution by gas stream is for the first time
0.7MPa, the steam pressure of comminution by gas stream is 1MPa for the second time.The dispersibility of detection titanium dioxide is 6.50, at acrylic coating
Covering power in (pigment volume concentration (PVC) is 20%) is 89.0%, and 60 ° of glossiness are 75.
Embodiment 6
This embodiment is used for the steam pressure that comminution by gas stream for the first time the is described steam pressure with second time comminution by gas stream
The dispersibility of titanium dioxide when difference is not in the range of the present invention is preferred.
Processing titanium dioxide according to the method for embodiment 1, except for the difference that, the steam pressure of comminution by gas stream is 3MPa for the first time,
The steam pressure of comminution by gas stream is 0.5MPa for the second time.The dispersibility of detection titanium dioxide is 6.65, at acrylic coating (pigment body
Volume concentrations is 20%) in covering power be 89.1%, 60 ° of glossiness are 75.
Embodiment 7
This embodiment for illustrate second time comminution by gas stream steam pressure not in scope of the present invention time titanium dioxide
Dispersibility.
Processing titanium dioxide according to the method for embodiment 2, except for the difference that, the steam pressure of comminution by gas stream is for the second time
0.2MPa.The dispersibility of detection titanium dioxide is 6.25, and the covering power in acrylic coating (pigment volume concentration (PVC) is 20%) is
87.3%, 60 ° of glossiness are 72.
Comparative example 1
This comparative example only carries out the dispersibility of the titanium dioxide of a comminution by gas stream for explanation.
By titanium dioxide that dried water content is 0.04 weight % and dispersant (aminomethylation silicone emulsion) according to point
Powder weight: the ratio of titanium dioxide weight=0.02:1 adds jet mill, is passed through steam, and steam pressure is 3MPa, is steaming
The weight ratio of vapour and titanium dioxide is to carry out comminution by gas stream under conditions of 3.5:1.The dispersibility of detection titanium dioxide is 6.0, at propylene
Covering power in acid coating (pigment volume concentration (PVC) is 20%) is 83.5%, and 60 ° of glossiness are 68.
Even if relatively comparative example 1 and embodiment 1 are it can be seen that improve the steam pressure of single treatment, also cannot effectively carry
The dispersibility of high titanium dioxide；And use the method for the invention that titanium dioxide carries out repeatedly comminution by gas stream, preferably twice air-flow
Pulverize, the dispersibility of titanium dioxide, and then the application performance of raising titanium dioxide can be effectively improved, such as covering power, glossiness.
Especially, comparing embodiment 2 and embodiment 5 are it can be seen that the steam pressure of comminution by gas stream is higher than second for the first time
During the steam pressure of secondary comminution by gas stream, the dispersive property of titanium dioxide is more preferable；Comparing embodiment 1 with embodiment 6 it can be seen that first
The titanium white when difference of the steam pressure of the steam pressure of secondary comminution by gas stream and second time comminution by gas stream is in scope of the present invention
The dispersibility of powder is more preferable；Comparing embodiment 2 and embodiment 7, the steam pressure of comminution by gas stream is in scope of the present invention for the second time
Time interior, the dispersibility of titanium dioxide is more preferable.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned embodiment
Detail, in the technology concept of the present invention, technical scheme can be carried out multiple simple variant, this
A little simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. the method improving titanium dioxide dispersibility, it is characterised in that the method includes: in the presence of dispersant, by titanium
White lead carries out comminution by gas stream at least twice.
Method the most according to claim 1, wherein, carries out titanium dioxide twice comminution by gas stream and controls air-flow powder for the first time
Broken steam pressure is 0.7-3MPa, and the steam pressure of comminution by gas stream is 0.5-2MPa for the second time.
Method the most according to claim 2, wherein, the steam pressure of described first time comminution by gas stream is 1-2.5MPa, institute
The steam pressure stating second time comminution by gas stream is 0.8-1.5MPa.
The most according to the method in claim 2 or 3, wherein, for the first time comminution by gas stream vapour pressure ratio second time air-flow powder
Broken steam pressure height at least 0.5MPa, preferably 0.5-1MPa.
The most according to the method in claim 2 or 3, wherein, in described first time comminution by gas stream, the steam used and institute
The weight ratio stating titanium dioxide is 0.5-4.5:1, preferably 1-3.5:1.
The most according to the method in claim 2 or 3, wherein, in described second time comminution by gas stream, the steam used and institute
The weight ratio stating titanium dioxide is 0.5-4:1, preferably 0.5-3:1.
Method the most according to claim 1, wherein, described dispersant is 0.001-with the weight ratio of described titanium dioxide
0.07:1, preferably 0.003-0.05:1.
8. according to the method described in claim 1 or 7, wherein, described dispersant is silane coupler, aminomethylation siloxanes breast
At least one in liquid, sulfomethylation silicone emulsion, aluminate coupling agent, titanate coupling agent and polyethers, preferably silane
Coupling agent and/or aminomethylation silicone emulsion.
Method the most according to claim 1, wherein, described method also includes: before comminution by gas stream, controls the moisture of titanium dioxide
Content is below 0.05 weight %.
10. according to the method described in claim 1 or 9, wherein, the mean diameter of described titanium dioxide is 0.3-1 μm.
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| CN107523097A (en) * | 2017-09-05 | 2017-12-29 | 攀钢集团重庆钛业有限公司 | A kind of pigment, titanium white compound powder, titanium dioxide and preparation method thereof |
| CN110170365A (en) * | 2019-04-28 | 2019-08-27 | 广州卡迪莲化妆品有限公司 | A kind of dispersing method of powder class cosmetics |
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| CN107523097A (en) * | 2017-09-05 | 2017-12-29 | 攀钢集团重庆钛业有限公司 | A kind of pigment, titanium white compound powder, titanium dioxide and preparation method thereof |
| CN110170365A (en) * | 2019-04-28 | 2019-08-27 | 广州卡迪莲化妆品有限公司 | A kind of dispersing method of powder class cosmetics |
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| CN106280572B (en) | 2018-08-14 |
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