CN102507505A - Determination method for covering power of titanium dioxide - Google Patents
Determination method for covering power of titanium dioxide Download PDFInfo
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- CN102507505A CN102507505A CN201110354783XA CN201110354783A CN102507505A CN 102507505 A CN102507505 A CN 102507505A CN 201110354783X A CN201110354783X A CN 201110354783XA CN 201110354783 A CN201110354783 A CN 201110354783A CN 102507505 A CN102507505 A CN 102507505A
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- Prior art keywords
- white powder
- titanium white
- titanium
- covering power
- reflectivity
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title abstract description 34
- 239000004408 titanium dioxide Substances 0.000 title abstract 9
- 238000002310 reflectometry Methods 0.000 claims abstract description 40
- 239000002966 varnish Substances 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 235000010215 titanium dioxide Nutrition 0.000 claims description 72
- 239000000843 powder Substances 0.000 claims description 70
- 239000001038 titanium pigment Substances 0.000 claims description 33
- 238000011156 evaluation Methods 0.000 claims description 13
- 238000003556 assay Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 230000001680 brushing effect Effects 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000007605 air drying Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000003973 paint Substances 0.000 abstract description 4
- 239000007888 film coating Substances 0.000 abstract 2
- 238000009501 film coating Methods 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
- 230000002950 deficient Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000003651 drinking water Substances 0.000 description 3
- 235000020188 drinking water Nutrition 0.000 description 3
- 239000004922 lacquer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to a determination method for covering power of titanium dioxide, and belongs to the field of titanium dioxide production. The present invention provides a determination method for the covering power of the titanium dioxide, wherein the concrete steps comprise that: a varnish and a titanium dioxide specimen are uniformly stirred and mixed to obtain a titanium dioxide paint paste; B the titanium dioxide paint paste is respectively coated on a whiteboard and a blackboard to form coating films, and a natural air drying treatment is performed on the coating films at a room temperature; and C the reflectivity on the whiteboard after film coating and the reflectivity on the blackboard after film coating are respectively determined, and the reflectivity on the blackboard is divided by the reflectivity on the whiteboard to calculate the contrast ratio to characterize the covering power of the titanium dioxide. The method of the present invention is adopted to determine the covering power of the titanium dioxide, such that result has the high precision, the operation is simple and feasible, and the analysis process is rapid and effective.
Description
Technical field
The invention belongs to the titanium white production field, be specifically related to the assay method of titanium white powder covering power.
Background technology
Titanium white powder has good optical property and pigment performance, therefore is widely used in industries such as coating.The quality of coating property, covering power are very important techniques indexs, and the titanium white powder covering power is claimed opacity again, are meant that titanium white powder covers the ability of ground fully as coating.
Yet; A lot of producers still continue to use traditional " black and white lattice method " GB 1709-1979 in the mensuration of covering power; Be about to titanium white powder sample and linseed oil and grind to form slurry, be painted on equably on the black and white lattice glass plate, do not see the black and white lattice until naked eyes; Make the lucky covered minimum of black and white lattice use sample size, the g/m of unit
2Though this assay method operation is fast succinct, still, because the strong and weak variation of (1) test environment light; (2) difference of test environment temperature and ventilation condition; (3) people make that to factors such as the sensorial subjective differences of aberration the test result deviation of this method is bigger.
To above-mentioned defective; At present covering powers that adopt the contrast ratio assay method to measure titanium white powder more; Method for more similar Chinese white contrast ratio can be referring to GB 5211.17-88; Promptly adopt with a kind of paint vehicle and process mill base to sample with standard specimen with identical prescription and method; Make with the rotation paint roller that thickness is essentially identical films on polyester film, record reflectivity and the reflectivity on the white background on the black matrix, and try to achieve contrast ratio divided by the reflectivity on the white background with reflectivity on the black matrix with reflectance meter; The contrast ratio of duplicate and standard specimen is to evaluate its quality.But this method complex procedures needs 48h the drying time of especially filming at least, and consuming time too of a specified duration, efficient is lower.
Summary of the invention
The technical matters that the present invention will solve provides a kind of assay method of titanium white powder covering power, has solved titanium white powder covering power assay method degree of accuracy long defective not high and consuming time in the prior art.
Technical scheme of the present invention is:
The invention provides a kind of assay method of titanium white powder covering power, concrete steps are:
A becomes the titanium white powder mill base with varnish with the titanium pigment specimen stirring and evenly mixing;
B forms the brushing of titanium white powder mill base respectively and films the room temperature of will filming air dried on blank and blackboard;
Blank after C measures respectively and films and the reflectivity on the blackboard are tried to achieve contrast ratio with the reflectivity on the blackboard divided by the reflectivity on the blank, characterize the covering power of titanium white powder with this.
Preferably, the weight ratio of varnish and titanium pigment specimen is 10: 1 in the said method steps A.
Preferably, the coating thickness that forms among the said method step B is consistent.
Preferably, the room temperature air dried 0.5-6h that films among the said method step B.
The present invention also provides a kind of evaluation method of titanium white powder covering power, and concrete steps are:
(1) contrast ratio of mensuration titanium white powder standard specimen:
Varnish is become the titanium white powder mill base with titanium white powder standard specimen stirring and evenly mixing, the brushing of titanium white powder mill base is formed on blank and blackboard film natural air drying under the room temperature of to film respectively; Measure blank and the reflectivity on the blackboard after filming then respectively, try to achieve the contrast ratio of titanium white powder standard specimen with the reflectivity on the blackboard divided by the reflectivity on the blank;
(2) contrast ratio of mensuration titanium pigment specimen:
Varnish is become the titanium white powder mill base with the titanium pigment specimen stirring and evenly mixing, the brushing of titanium white powder mill base is formed on blank and blackboard film natural air drying under the room temperature of to film respectively; Measure blank and the reflectivity on the blackboard after filming then respectively, try to achieve the contrast ratio of titanium pigment specimen with the reflectivity on the blackboard divided by the reflectivity on the blank;
(3) contrast ratio of comparison titanium pigment specimen and titanium white powder standard specimen is if the contrast ratio of titanium pigment specimen shows the covering power of titanium pigment specimen covering power greater than the titanium white powder standard specimen greater than the contrast ratio of titanium white powder standard specimen.
Preferably, the weight ratio of varnish and titanium white powder standard specimen appearance is 10: 1 in the above-mentioned evaluation method step (1), and the weight ratio of varnish and titanium pigment specimen is 10: 1 in the step (2).
Preferably, above-mentioned evaluation method step (1) is consistent with the coating thickness of formation in the step (2).
Preferably, the room temperature air dried 0.5-6h that films in above-mentioned evaluation method step (1) and the step (2).
Beneficial effect of the present invention:
Utilize the inventive method to measure and estimate the covering power of titanium white powder sample, degree of accuracy is higher as a result for it, and easy to operation, and the analytic process effective and rapid can be widely used in the mensuration of titanium white powder covering power.
Embodiment
The invention provides a kind of assay method of titanium white powder covering power, concrete steps are:
A becomes the titanium white powder mill base with varnish with the titanium pigment specimen stirring and evenly mixing;
B forms the brushing of titanium white powder mill base respectively and films natural air drying under the room temperature of will filming on blank and blackboard;
Blank after C measures respectively and films and the reflectivity on the blackboard are tried to achieve contrast ratio with the reflectivity on the blackboard divided by the reflectivity on the blank, characterize the covering power of titanium white powder with this.
Preferably, the weight ratio of varnish and titanium pigment specimen is 10: 1 in the said method steps A.
Preferably, the coating thickness that forms among the said method step B is consistent.
Preferably, the room temperature air dried 0.5-6h that films among the said method step B.
The present invention also provides a kind of evaluation method of titanium white powder covering power, and concrete steps are:
(1) contrast ratio of mensuration titanium white powder standard specimen:
Varnish is become the titanium white powder mill base with titanium white powder standard specimen stirring and evenly mixing, the brushing of titanium white powder mill base is formed on blank and blackboard film natural air drying under the room temperature of to film respectively; Measure blank and the reflectivity on the blackboard after filming then respectively, try to achieve the contrast ratio of titanium white powder standard specimen with the reflectivity on the blackboard divided by the reflectivity on the blank;
(2) contrast ratio of mensuration titanium pigment specimen:
Varnish is become the titanium white powder mill base with the titanium pigment specimen stirring and evenly mixing, the brushing of titanium white powder mill base is formed on blank and blackboard film natural air drying under the room temperature of to film respectively; Measure blank and the reflectivity on the blackboard after filming then respectively, try to achieve the contrast ratio of titanium pigment specimen with the reflectivity on the blackboard divided by the reflectivity on the blank;
(3) contrast ratio of comparison titanium pigment specimen and titanium white powder standard specimen is if the contrast ratio of titanium pigment specimen shows the covering power of titanium pigment specimen covering power greater than the titanium white powder standard specimen greater than the contrast ratio of titanium white powder standard specimen.
Preferably, the weight ratio of varnish and titanium white powder standard specimen appearance is 10: 1 in the above-mentioned evaluation method step (1), and the weight ratio of varnish and titanium pigment specimen is 10: 1 in the step (2).
Preferably, above-mentioned evaluation method step (1) is consistent with the coating thickness of formation in the step (2).
Preferably, the room temperature air dried 0.5-6h that films in above-mentioned evaluation method step (1) and the step (2).
Among the present invention, removing has specified otherwise, and covering power all refers to the covering power of titanium white powder sample, can characterize with contrast ratio, and contrast ratio is big more, shows that its covering power is big more.Black and white plate of the present invention is the hiding power chart plate.
Varnish (coating that does not contain coloring material) has another name called varnish, is to be that main film forming substance is adding the coating of solvent composition by resin.Because coating all is transparent with filming, thereby also claims clear dope.
The evaluation method of titanium white powder covering power is specially:
1, on thick balance, takes by weighing a certain amount of varnish (with the drinking-water cup), take by weighing an amount of titanium white sample again, and pour in the water glass that varnish is housed, stir 5min uniformly with glass bar; The standard specimen method for making is identical; The part by weight of varnish and titanium white powder is 10: 1;
2, place the mill base that makes on the blank of black and white cardboard with glass bar, standard specimen places the left side, and sample places the right (sample and standard specimen are substantially parallel, and arranged the intermittence of 2-5mm), scrapes from blank toward blackboard with the wet film preparing device again; Owing to adopt the wet film preparing device, the consistency of thickness that gained is filmed;
3, cardboard is lain in a horizontal plane in indoor, natural air drying under the room temperature generally needs 0.5h-6h;
4, measure the reflectivity of filming on the white square earlier, measure four points up and down, R averages
WWith filming on the measuring reflectance black matrix, measure four points up and down again, R averages
BStandard specimen is also measured by above-mentioned steps;
5, adopt the computes contrast ratio (characterizing covering power) of filming with this:
R
B-reflectivity R on the black square plate films
W-the reflectivity on the white square plate of filming
Standard specimen is also pressed following formula and is calculated, and compares the reflectivity of sample and standard specimen again, and data show that more greatly covering power is good more, evaluates its quality.
Do further description below in conjunction with the embodiment specific embodiments of the invention, therefore do not limit the present invention among the described scope of embodiments.
Material and instrument
The disposable plastic water glass
Glass bar
Black and white cardboard 14cm * 20cm is last white black down, and cardboard requirement overlay film, to guarantee the not infiltration wet film preparing device SZQ-100 in paper of appearance that films
Embodiment 1
1 takes by weighing 10g U.S.A on thick balance is coated with scholar's lacquer (with the drinking-water cup), adds one batch of sample that my company of 1g produces again, stirs 5min uniformly with glass bar; The standard specimen method for making is identical;
2 usefulness glass bars place the mill base that makes on the blank of black and white cardboard, and standard specimen places the left side, and sample places the right (sample and standard specimen are substantially parallel, and arranged the intermittence of 3mm), scrape from blank toward blackboard with the wet film preparing device again;
3 cardboard is lain in a horizontal plane in indoor, room temperature held 0.5h;
4 measure the reflectivity of filming on the blank earlier, measure four points up and down, and R averages
WMeasure filming on the blackboard again, measure four points up and down, R averages
BStandard specimen is also measured by above-mentioned steps;
The contrast ratio of gained sample and standard specimen is as shown in table 1, if the contrast ratio of sample shows then that greater than the contrast ratio of standard specimen the covering power index of this sample is qualified, on the contrary defective.
Embodiment 2
Step adopts two batches of samples (different with one batch of sample production time) of my company's production with embodiment 1, and selected standard specimen is identical with the embodiment standard specimen; The test comparison rate, test result is as shown in table 1.
Embodiment 3
Step adopts three batches of samples (different with two batches of sample production times with a batch) of my company's production with embodiment 1, and selected standard specimen is identical with the embodiment standard specimen; The test comparison rate, test result is as shown in table 1; If the contrast ratio of sample, shows that the covering power index of this Lot sample is qualified greater than the contrast ratio of deciding through consultation standard specimen, otherwise defective.
In the practical application; The inventor often combines two kinds of titanium white powder covering powers of comparison with the inventive method and a kind of comparatively accurate ocular estimate; The ocular estimate that adopts is specially: on thick balance, take by weighing 10g U.S.A and be coated with scholar's lacquer (with the drinking-water cup); Add one batch of sample that my company of 1g produces again, stir 5min uniformly with glass bar, the standard specimen method for making is identical; Place the mill base that makes on the blank of black and white cardboard with glass bar, standard specimen places the left side, and sample places the right (sample and standard specimen are substantially parallel, and arranged the intermittence of 2-5mm), scrapes from blank toward blackboard with the wet film preparing device again; At light is not very dark, and under the also not dazzling situation, sight line becomes 30 ° of-90 ° of angles with the plate face, standard specimen and sample on the observation blackboard, if sample is white more, and light transmission rate is low, is difficult for seeing black matrix, and then covering power is better than standard specimen, otherwise than standard specimen difference; Go out following grade from good and bad situation decidable: be superior to, slightly be better than, be not less than, elementary errors in, be lower than.Adopt this method that titanium white powder sample and the standard specimen of embodiment 1-3 are compared, its comparative result comes to the same thing with what employing contrast ratio method of the present invention recorded.
Comparative Examples
In order to verify test result of the present invention; The present invention also tests the titanium pigment specimen among above-mentioned three embodiment and the covering power of standard specimen respectively according to the method among the GB 5211.17-88; Be designated as Comparative Examples 1, Comparative Examples 2, Comparative Examples 3, the gained result is as shown in table 2.
Table 1 adopts the inventive method to record the contrast ratio of titanium pigment specimen and standard specimen
| The sample contrast ratio | The standard specimen contrast ratio | Sample covering power index | |
| Embodiment 1 | 71.50 | 68.35 | Qualified |
| Embodiment 2 | 63.18 | 68.35 | Defective |
| Embodiment 3 | 70.17 | 68.35 | Qualified |
Table 2 adopts GB 5211.17-88 method to record the contrast ratio of titanium pigment specimen and standard specimen
| The sample contrast ratio | The standard specimen contrast ratio | Sample covering power index | |
| Comparative Examples 1 | 68.13 | 65.36 | Qualified |
| Comparative Examples 2 | 60.55 | 65.36 | Defective |
| Comparative Examples 3 | 66.42 | 65.36 | Qualified |
Can know that through contrast table 1 and table 2 result who adopts the inventive method to estimate titanium pigment specimen covering power (covering power that is about to sample and standard specimen compares) estimates coming to the same thing of titanium pigment specimen covering power with the method that adopts GB 5211.17-88 regulation.So in the practical application; We can adopt method of the present invention to measure the contrast ratio and the contrast ratio of deciding through consultation standard specimen of the titanium pigment specimen of manufacturer production fully; Both are compared; If the contrast ratio value of the sample of producing is high than the contrast ratio of institute's mark appearance, show that then the hiding power value of producing sample is qualified, show that this sample can use; Otherwise then be unacceptable product; And do not need to go to measure according to the comparatively complicated and method consuming time of GB 5211.17-88 regulation.
Claims (8)
1. the assay method of titanium white powder covering power, concrete steps are:
A becomes the titanium white powder mill base with varnish with the titanium pigment specimen stirring and evenly mixing;
B forms the brushing of titanium white powder mill base respectively and films the room temperature of will filming air dried on blank and blackboard;
Blank after C measures respectively and films and the reflectivity on the blackboard are tried to achieve contrast ratio with the reflectivity on the blackboard divided by the reflectivity on the blank, characterize the covering power of titanium white powder with this.
2. the assay method of titanium white powder covering power according to claim 1 is characterized in that, the weight ratio of varnish and titanium pigment specimen is 10: 1 in the steps A.
3. the assay method of titanium white powder covering power according to claim 1 and 2 is characterized in that, the coating thickness that forms among the step B is consistent.
4. according to the assay method of each described titanium white powder covering power of claim 1-3, it is characterized in that the room temperature of filming among step B air dried 0.5-6h.
5. the evaluation method of titanium white powder covering power, concrete steps are:
(1) contrast ratio of mensuration titanium white powder standard specimen:
Varnish is become the titanium white powder mill base with titanium white powder standard specimen stirring and evenly mixing, the brushing of titanium white powder mill base is formed on blank and blackboard film the room temperature of to film air dried respectively; Measure blank and the reflectivity on the blackboard after filming then respectively, try to achieve the contrast ratio of titanium white powder standard specimen with the reflectivity on the blackboard divided by the reflectivity on the blank;
(2) contrast ratio of mensuration titanium pigment specimen:
Varnish is become the titanium white powder mill base with the titanium pigment specimen stirring and evenly mixing, the brushing of titanium white powder mill base is formed on blank and blackboard film the room temperature of to film air dried respectively; Measure blank and the reflectivity on the blackboard after filming then respectively, try to achieve the contrast ratio of titanium pigment specimen with the reflectivity on the blackboard divided by the reflectivity on the blank;
(3) contrast ratio of comparison titanium pigment specimen and titanium white powder standard specimen is if the contrast ratio of titanium pigment specimen shows the covering power of titanium pigment specimen covering power greater than the titanium white powder standard specimen greater than the contrast ratio of titanium white powder standard specimen.
6. the evaluation method of titanium white powder covering power according to claim 5 is characterized in that, the weight ratio of varnish and titanium white powder standard specimen is 10: 1 in the step (1), and the weight ratio of varnish and titanium pigment specimen is 10: 1 in the step (2).
7. according to the evaluation method of claim 5 or 6 described titanium white powder covering powers, it is characterized in that step (1) is consistent with the coating thickness of formation in the step (2).
8. according to the evaluation method of each described titanium white powder covering power of claim 5-7, it is characterized in that room temperature air dried 0.5-6h films in step (1) and the step (2).
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Cited By (13)
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| CN104764720A (en) * | 2015-04-03 | 2015-07-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for comparing transparency of nanometer titanium dioxide and preparation method of composite material |
| CN106198935A (en) * | 2016-07-26 | 2016-12-07 | 廊坊立邦涂料有限公司 | A kind of detection method of the engineering covering power of coating |
| CN106501188A (en) * | 2016-11-15 | 2017-03-15 | 攀钢集团钛业有限责任公司 | Coating covering power detection method and control methods |
| CN107421914A (en) * | 2017-06-12 | 2017-12-01 | 江苏特丰新材料科技有限公司 | A kind of method of testing of Chinese white covering power in the plastic |
| CN109142282A (en) * | 2017-06-13 | 2019-01-04 | 江苏特丰新材料科技有限公司 | A kind of detection method of titanium dioxide covering power in ink |
| CN109444137A (en) * | 2018-11-11 | 2019-03-08 | 廊坊立邦涂料有限公司 | A kind of detection method of coating black and white lattice covering power |
| CN109655429A (en) * | 2018-12-29 | 2019-04-19 | 镇江泛华检测科技有限公司 | A kind of detection method of architectural reflective heat-insulation paint (flat to apply) heat-proof quality |
| CN110982202A (en) * | 2019-11-25 | 2020-04-10 | 江苏富仕德科技发展有限公司 | Thermosetting resin composition, prepreg prepared from thermosetting resin composition and copper-clad plate |
| CN111721742A (en) * | 2020-06-29 | 2020-09-29 | 亚士漆(上海)有限公司 | Auxiliary device for testing covering power of wet coating and method for testing covering power of wet coating |
| CN113125381A (en) * | 2020-01-15 | 2021-07-16 | 日涂(上海)涂料研究开发有限公司 | Detection method and comparison method for evaluating covering power of wet coating film and special pressing plate device thereof |
| CN114112930A (en) * | 2020-08-26 | 2022-03-01 | 立邦涂料（中国）有限公司 | Testing device and testing method for contrast ratio of paint wet film |
| CN114323854A (en) * | 2021-12-28 | 2022-04-12 | 攀枝花东方钛业有限公司 | Sample preparation method for titanium dioxide paint application evaluation method |
| CN114323855A (en) * | 2021-12-28 | 2022-04-12 | 攀枝花东方钛业有限公司 | Sample preparation method for titanium dioxide papermaking application evaluation method |
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| CN104764720B (en) * | 2015-04-03 | 2017-05-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for comparing transparency of nanometer titanium dioxide and preparation method of composite material |
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| CN106198935A (en) * | 2016-07-26 | 2016-12-07 | 廊坊立邦涂料有限公司 | A kind of detection method of the engineering covering power of coating |
| CN106501188A (en) * | 2016-11-15 | 2017-03-15 | 攀钢集团钛业有限责任公司 | Coating covering power detection method and control methods |
| CN107421914A (en) * | 2017-06-12 | 2017-12-01 | 江苏特丰新材料科技有限公司 | A kind of method of testing of Chinese white covering power in the plastic |
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