CN105115855A - Method for screening defoamers for emulsion varnishes or for testing defoaming effect of defoamers - Google Patents
Method for screening defoamers for emulsion varnishes or for testing defoaming effect of defoamers Download PDFInfo
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- CN105115855A CN105115855A CN201510551302.2A CN201510551302A CN105115855A CN 105115855 A CN105115855 A CN 105115855A CN 201510551302 A CN201510551302 A CN 201510551302A CN 105115855 A CN105115855 A CN 105115855A
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Abstract
The invention provides a method for screening defoamers for emulsion varnishes. According to the method, defoamers for different kinds of emulsion varnishes and with the same weight are respectively added into emulsion varnish samples having same components and weight and containing no defoamers, then the obtained emulsion varnishes are subjected to density measurement, and the larger the measured density is, the better the defoaming effect of the defoamer in the emulsion varnish is. With the adoption of the method, the defoamers can be rapidly and accurately screened, time and labor are saved, the efficiency is high, and meanwhile, in the screening process, the amount of materials consumed is small, the operation is simple, and the efficiency is high; the differences of the defoaming effects of the defoamers can be obtained by comparing with small amount of material consumption and without the complicated construction process; therefore, the method has the advantages of convenience and rapidness, reduction of product consumption, and improvement of the work efficiency.
Description
Technical field
The invention belongs to paint field, particularly a kind of method of screening latex paint defoamer or testing its defoaming effect.
Background technology
Latex paint is a kind of is base-material with synthetic resin emulsion, adds the organic water borne coating that pigment, filler and various auxiliary agent are formulated, is also called synthetic resin emulsion coating.Owing to not having in latex paint or seldom containing organic solvent, therefore, it does not injure the health of people, does not pollute environment, in performance, price and environmental protection, possess distinctive advantage.Current latex paint enters huge numbers of families as an indispensable finishing material, and defoaming effect is an important indicator of assessment latex paint performance quality.The defoaming effect of latex paint illustrates that well coating surface flatness is good, superior product quality, and customer satisfaction is high when with this latex paint brushing, thus the competitive power of improving product.
In latex paint industry, often run into the situation of comparison latex paint defoamer defoaming effect in work, it is how many to be reflected in after can opening bubble in tank, and during construction, how many, froth breaking speed of bubble etc., needs the defoaming effect repeatedly assessing latex paint defoamer.The method that tradition compares latex paint defoamer defoaming effect is brushing latex paint on unit area metope or cement fibrolite plate, after comparing brushing latex paint, occur that bubble is how many, how many antifoaming speed speed, foam times are assessed.Need in the process scrape 2 ~ 3 times putty through criticizing and polish flat, then brushing latex paint comparison defoamer defoaming effect, about 1 ~ 2 day consuming time of this process, adopts this class methods resource cost larger.And when the latex paint defoamer kind quantity that need compare increases, need to pay more human and material resources and financial resources.
Summary of the invention
The object of the present invention is to provide a kind of screening latex paint defoamer method, the method fast, convenient, accurately and can consumptive material consuming time be reduced, reduce costs.
Another object of the present invention is to provide a kind of method of testing the defoaming effect of latex paint defoamer, the method is quick and easy.
The invention provides a kind of method of screening latex paint defoamer, what, weight identical at composition was identical does not contain in the latex paint paint sample of defoamer, add the different latex paint defoamers that weight is identical respectively, density measurement is carried out to obtained latex paint, measured density is larger, illustrates that the defoaming effect of latex paint defoamer used in this latex paint is better.
Preferably, said method comprising the steps of:
A () makes not containing the latex paint paint sample of defoamer;
It is stand-by that b latex paint paint sample that step (a) obtains by () is divided into some parts, adds the different latex paint defoamers that weight is identical in each part respectively;
C each part paint sample that () will obtain after step (b) process, stirs same time, then carries out density measurement respectively to it under identical speed of agitator.
Density value is larger, illustrates that the defoaming effect of latex paint defoamer is better.
Preferably, with density cup, density measurement is carried out to paint sample;
Preferably, density cup is 100ml density cup.
Preferably, the addition of latex paint defoamer is 0.2% ~ 0.5% of every part of paint sample weight.
Preferably, the weight of every part of paint sample is 500 grams.
Preferably, every part of paint sample uses the packing of 0.5L plastic tank.
Preferably, when measuring density, temperature is 25 DEG C.
Preferably, in described step (c), speed of agitator is 600-800r/min, and mixing time is 5-10min; Further preferably, speed of agitator is 700r/min, and mixing time is 8min.
Preferably, in described step (c), described stirring dispersion machine carries out.
Preferably, the dispersion impeller diameter of described dispersion machine is 50mm.
Preferably, dispersion machine is Tianjin Sen Da QSJ type dispersion machine.
Preferably, to the mensuration of each part paint sample density, survey is at least repeated 3 times.
Preferably, to the mensuration of each part paint sample density, mensuration process completes in 10min.
The method of screening latex paint defoamer of the present invention, is also applicable to screen the defoamer of one-component solvent-thinned paint.
The present invention also provides a kind of method of testing the defoaming effect of defoamer in latex paint, it is characterized in that, identical to other composition, weight is identical but the latex paint that contained latex paint defoamer is different carries out density measurement, measured density is larger, illustrates that the defoaming effect of latex paint defoamer used in this latex paint is better.
The method of the defoaming effect of defoamer in test latex paint of the present invention, is also applicable to measure the defoaming effect of the defoamer of one-component solvent-thinned paint.
Beneficial effect of the present invention is:
(1) density measurement step is for screening in the method for latex paint defoamer, and can reach screening object quickly and accurately, time saving and energy saving, efficiency is high; Only need a small amount of material loss and need not be loaded down with trivial details work progress just can compare the difference of the defoaming effect of defoamer, there is advantage that is convenient and swift, that reduce product loss, increase work efficiency;
(2) setting of step (a), (b), (c), forms a complete screening process, and arranges rationally, once can filter out the good latex paint defoamer of defoaming effect from multiple different defoamer; Method is simple, efficient and convenient;
(3) addition of latex paint defoamer is 0.2% ~ 0.5% of every part of paint sample weight, not only can reach object of the present invention, rapid screening goes out the good latex paint defoamer of defoaming effect, can also reduce and avoid latex paint defoamer to waste, and lowers consumptive material;
(4) during mensuration density, temperature is 25 DEG C, can ensure to the evaluation of latex paint defoamer defoaming effect it is carry out under the normal environment for use of latex paint defoamer, can the practicality of fully guarantee the inventive method screening latex paint defoamer, ensure the accuracy that latex paint defoamer defoaming effect is evaluated;
(5) setting of speed of agitator and mixing time, can ensure that the effect of latex paint defoamer gives full play to, not lose time again, carry highdensity determination efficiency, improves the screening effeciency to latex paint defoamer further;
(6) stir with dispersion machine, good to the dispersion effect of latex paint defoamer, screening effeciency can be improved; The dispersion impeller diameter of dispersion machine is 50mm, and be 0.5L plastic tank diameter 2/3rds, dispersion efficiency is suitable;
(7) in density measurement, at least repeat survey 3 times, the accuracy of data can be ensured, reduce measuring error;
(8) use the density of the density cup of 100ml to each part paint sample to measure, while the less consumptive material of guarantee, measuring accuracy can be improved; Density cup volume is large, and unit volume test paint sample is more, and measuring error is less; Density cup volume is little, and unit volume test paint sample is less, and measuring error is large;
(9) weight of every part of paint sample is 500 grams, and uses 0.5 liter of plastic tank packing, can while economizing on resources, reducing consumptive material, improves measuring accuracy, and operate not only economy but also quick; Because most of latex paint density is between 1.200-1.500g/ml, when using the canned 500 grams of paint samples of 0.5 liter of plastics, paint sample volume accounts for container volume more than 2/3rds, and stirring space is suitable; Be between 1.00-2.50 gram according to latex paint defoamer additional proportion known latex paint defoamer addition, test density required paint sample is had a surplus but does not waste.
Embodiment
Below in conjunction with specific embodiment, method of the present invention is described further, but method of the present invention is not limited to following examples.
Embodiment 1
1, subjects
1.1 latex paints defoamer sample
The source of latex paint defoamer 1-9 is as shown in table 1:
The table 1 latex paint source of defoamer 1-9
1.2 latex paint formulation:
Latex paint formulation is as shown in table 2, and wherein, described latex paint defoamer 14 is selected from the latex paint defoamer of 1-9 in table 1.
The formula of table 2 latex paint
2, screening technique
Compare according to the defoaming effect size of method of the present invention to latex paint defoamer, and then the latex paint defoamer that screening defoaming effect is good.
The method of screening latex paint defoamer of the present invention, comprises the following steps:
A () makes containing the latex paint paint sample 5000g of latex paint defoamer according to the formula in table 2, to be accurate to after radix point 1, each component in latex paint paint sample all adds by normal recipe proportioning;
B 5000g latex paint paint sample that step (a) obtains by () be divided into 10 parts stand-by, every part of 500.0g, will wherein 9 parts paint samples in be filled in 9 0.5L plastic tanks respectively, then in 9 0.5L plastic tanks, add 9 kinds of different latex paint defoamer 1-9 as shown in table 1, (namely addition is 1.00 grams, the addition of latex paint defoamer is 0.2% of every part of paint sample weight), be accurate to 2 significant digits;
C 9 parts of paints sample (i.e. sample 1-9) that () will obtain after step (b) process, use the Tianjin Sen Da QSJ type dispersion machine of dispersion impeller diameter 50 millimeters respectively, 5min is stirred under the rotating speed of 600r/min, then measure its density respectively with density cup, to be accurate to after radix point three;
3 density measurements are carried out to the paint sample 100ml density cup that above-mentioned steps (c) obtains, and gets the density of mean value as paint sample of 3 measurement results;
Then compare each density value size: density value is larger, the defoaming effect of corresponding latex paint defoamer is better; Density value is less, and the defoaming effect of corresponding latex paint defoamer is poorer.And then filter out the best latex paint defoamer of effect.
3, measurement result
Test result is as shown in table 3.Wherein, sample 1-9 is added with 9 paint samples of 9 kinds of different latex paint defoamers (that is, latex paint defoamer 1-9 as shown in table 1) respectively in corresponding screening technique.ρ
1it is the density value measured for the 1st time; ρ
2it is the density value measured for the 2nd time; ρ
3it is the density value measured for the 3rd time;
be the mean value measured for 3 times; t
durationfor measuring duration; Described " measurement duration " comprise to often kind of sample from measured and measure and obtain time of the mean difference of density.
The measurement result of table 3 sample 1-9
As shown in Table 3, above-mentioned 9 kinds of sample paints containing latex paint defoamer, density is followed successively by from small to large: sample 6, sample 2, sample 8, sample 1, sample 9, sample 3, sample 4, sample 7, sample 5; The defoaming effect sequence of corresponding latex paint defoamer is also like this, and the defoaming effect of latex paint defoamer used in interpret sample 5 is best.The measurement duration of often kind of sample is 15min, and always consuming time is 2.25h.
Comparative example 1
1, screening technique
The construction method traditionally comparing latex paint defoamer defoaming effect compares the defoaming effect between in the same manner as in Example 19 samples (sample 1-9), and then the latex paint defoamer that screening defoaming effect is good.
Use the cement fibrolite plate that 9 blocks of identical grounds are 1m × 1m, adopt identical painting tool to carry out identical process to above-mentioned ground.Described process comprises criticizing scrapes 2 times putty, starts brushing latex paint (described latex paint is the sample paint of sample 1-9, respectively containing corresponding latex paint defoamer 1-9 in sample 1-9) after dry tack free after being polished flat by putty plate.For the brushing time and japanning amount that make each sample paint are consistent, be same one man operation and complete.Record foam time: after a sample painting brush is coated with, uses stopwatch record foam time immediately, and access panel face, till plate face does not have bubble, stops record, writes down the used time.Sample paint every 30min recoat once, and records foam time.According to above-mentioned steps, to all samples paint Parallel testing 3 times, the foam time of 3 times is respectively t
1, t
2, t
3, get the mean value that three times are measured the foam time of gained, be average foam time
then measurement time t is recorded
duration, described " measurement duration " comprises putty and criticizes the time scraping 2 times and obtain described average foam time, does not comprise time and recoat interval time of putty drying.
Foam time is shorter, and defoaming effect is better.
2, measurement result
Test result is as shown in table 4.
The measurement result of table 4 sample 1-9
As shown in Table 4, above-mentioned 9 kinds of sample paints containing latex paint defoamer, density is followed successively by from small to large: sample 6, sample 2, sample 8, sample 1, sample 9, sample 3, sample 4, sample 7, sample 5; The defoaming effect sequence of corresponding latex paint defoamer is also like this, and the defoaming effect of defoamer used in interpret sample 5 is best.The measurement duration of often kind of sample is 65min, and always consuming time is 9.75h.
From comparing of table 3 and table 4, in the defoaming effect process of more multiple latex paint defoamer, adopt the inventive method identical with the conclusion adopting classic method to obtain, but adopt the measurement duration of measurement duration far below classic method of the inventive method, and scrape 2 times putty because the inventive method eliminates criticizing in classic method, brushing latex paint (latex paint after dry tack free, i.e. sample paint) etc. step, the waste of the latex paint therefore in the inventive method is also much smaller than the waste in classic method.
As can be seen here, adopt the inventive method to not only increase work efficiency, also greatly saved measurement cost.
Embodiment 2
1, experimental subjects
1.1 latex paints defoamer sample
The source of latex paint defoamer 1-9 is as shown in table 5:
The table 5 latex paint source of defoamer 1-9
| Defoamer sample | Model | Manufacturer |
| 1 | ADF1551 | Shenzhen Hai Run Chemical Co., Ltd. |
| 2 | DF-6760 | De Feng defoamer company limited |
| 3 | FOAMASTER 8000 | BASF nursing Chemical Company |
| 4 | DEFOAMER 334 | Hai Chuan new material Science and Technology Ltd. |
| 5 | FOAMSTAR ST 2410 AC | BASF Auxiliary Chemicals Co., Ltd. |
| 6 | DF-681F | De Feng defoamer company limited |
| 7 | FOAMASTER NXZ | BASF nursing Chemical Company |
| 8 | ADF5009 | Shenzhen Hai Run Chemical Co., Ltd. |
| 9 | DF-5800C | Suo Weier Zhenjiang Chemical Company |
1.2 latex paint formulation:
Latex paint formulation is as shown in table 6, and wherein, described latex paint defoamer 19 is selected from the latex paint defoamer of 1-9 in table 5.
The formula of table 6 latex paint
2, screening technique
Compare according to the defoaming effect size of method of the present invention to latex paint defoamer, and then the latex paint defoamer that screening defoaming effect is good.
The method of screening latex paint defoamer of the present invention, comprises the following steps:
A () makes containing the latex paint paint sample 5000g of latex paint defoamer according to the formula in table 6, to be accurate to after radix point 1, each component in latex paint paint sample all adds by normal recipe proportioning;
B 5000g latex paint paint sample that step (a) obtains by () be divided into 10 parts stand-by, every part of 500.0g, will wherein 9 parts paint samples in be filled in 9 0.5L plastic tanks respectively, then in 9 0.5L plastic tanks, add 9 kinds of different latex paint defoamer 1-9 as shown in table 1, (namely addition is 2.50 grams, the addition of latex paint defoamer is 0.5% of every part of paint sample weight), be accurate to 2 significant digits;
C 9 parts of paints sample (i.e. sample 1-9) that () will obtain after step (b) process, use the Tianjin Sen Da QSJ type dispersion machine of dispersion impeller diameter 50 millimeters respectively, 10min is stirred under the rotating speed of 800r/min, then measure its density respectively with density cup, to be accurate to after radix point three;
3 density measurements are carried out to the paint sample 100ml density cup that above-mentioned steps (c) obtains, and gets the density of mean value as paint sample of 3 measurement results;
Then compare each density value size: density value is larger, the defoaming effect of corresponding latex paint defoamer is better; Density value is less, and the defoaming effect of corresponding latex paint defoamer is poorer.And then filter out the best latex paint defoamer of effect.
3, measurement result
Test result is as shown in table 7.Wherein, sample 1-9 is added with 9 paint samples of 9 kinds of different latex paint defoamers (that is, latex paint defoamer 1-9 as shown in table 5) respectively in corresponding screening technique.ρ
1it is the density value measured for the 1st time; ρ
2it is the density value measured for the 2nd time; ρ
3it is the density value measured for the 3rd time;
be the mean value measured for 3 times; t
durationfor measuring duration; Described " measurement duration " comprise to often kind of sample from measured and measure and obtain time of the mean difference of density.
The measurement result of table 7 sample 1-9
As shown in Table 7, above-mentioned 9 kinds of sample paints containing latex paint defoamer, density is followed successively by from small to large: sample 6, sample 2, sample 8, sample 1, sample 9, sample 3, sample 4, sample 7, sample 5; The defoaming effect sequence of corresponding latex paint defoamer is also like this, and the defoaming effect of defoamer used in interpret sample 5 is best.The measurement duration of often kind of sample is 15min, and always consuming time is 2.25h.
Comparative example 2
1, screening technique
The construction method traditionally comparing latex paint defoamer defoaming effect compares the defoaming effect between in the same manner as in Example 29 samples (sample 1-9), and then the latex paint defoamer that screening defoaming effect is good.
Use the cement fibrolite plate that 9 blocks of identical grounds are 1m × 1m, adopt identical painting tool to carry out identical process to above-mentioned ground.Described process comprises criticizing scrapes 2 times putty, starts brushing latex paint (described latex paint is the sample paint of sample 1-9, respectively containing corresponding latex paint defoamer 1-9 in sample 1-9) after dry tack free after being polished flat by putty plate.For the brushing time and japanning amount that make each sample paint are consistent, be same one man operation and complete.Record foam time: after a sample painting brush is coated with, uses stopwatch record foam time immediately, and access panel face, till plate face does not have bubble, stops record, writes down the used time.Sample paint every 30min recoat once, and records foam time.According to above-mentioned steps, to all samples paint Parallel testing 3 times, the foam time of 3 times is respectively t
1, t
2, t
3, get the mean value that three times are measured the foam time of gained, be average foam time
then measurement time t is recorded
duration, described " measurement duration " comprises putty and criticizes the time scraping 2 times and obtain described average foam time, does not comprise time and recoat interval time of putty drying.
Foam time is shorter, and defoaming effect is better.
2, measurement result
Test result is as shown in table 8.
The measurement result of table 8 sample 1-9
As shown in Table 8, above-mentioned 9 kinds of sample paints containing latex paint defoamer, density is followed successively by from small to large: sample 6, sample 2, sample 8, sample 1, sample 9, sample 3, sample 4, sample 7, sample 5; The defoaming effect sequence of corresponding latex paint defoamer is also like this, and the defoaming effect of defoamer used in interpret sample 5 is best.The measurement duration of often kind of sample is 65min, and always consuming time is 9.75h.
From comparing of table 7 and table 8, in the defoaming effect process of more multiple latex paint defoamer, adopt the inventive method identical with the conclusion adopting classic method to obtain, but adopt the measurement duration of measurement duration far below classic method of the inventive method, and scrape 2 times putty because the inventive method eliminates criticizing in classic method, brushing latex paint (latex paint after dry tack free, i.e. sample paint) etc. step, the waste of the latex paint therefore in the inventive method is also much smaller than the waste in classic method.
Embodiment 3
1, subjects
1.1 latex paints defoamer sample
The source of latex paint defoamer 1-9 is as shown in table 9:
The table 9 latex paint source of defoamer 1-9
1.2 latex paint formulation:
Latex paint formulation is as shown in table 10, and wherein, described latex paint defoamer 18 is selected from the latex paint defoamer of 1-9 in table 9.
The formula of table 10 latex paint
2, screening technique
Compare according to the defoaming effect size of method of the present invention to latex paint defoamer, and then the latex paint defoamer that screening defoaming effect is good.
The method of screening latex paint defoamer of the present invention, comprises the following steps:
A () makes containing the latex paint paint sample 5000g of latex paint defoamer according to the formula in table 2, to be accurate to after radix point 1, each component in latex paint paint sample all adds by normal recipe proportioning;
B 5000g latex paint paint sample that step (a) obtains by () be divided into 10 parts stand-by, every part of 500.0g, will wherein 9 parts paint samples in be filled in 9 0.5L plastic tanks respectively, then in 9 0.5L plastic tanks, add 9 kinds of different latex paint defoamer 1-9 as shown in table 1, (namely addition is 2.00 grams, the addition of latex paint defoamer is 0.4% of every part of paint sample weight), be accurate to 2 significant digits;
C 9 parts of paints sample (i.e. sample 1-9) that () will obtain after step (b) process, use the Tianjin Sen Da QSJ type dispersion machine of dispersion impeller diameter 50 millimeters respectively, 8min is stirred under the rotating speed of 700r/min, then measure its density respectively with density cup, to be accurate to after radix point three;
3 density measurements are carried out to the paint sample 100ml density cup that above-mentioned steps (c) obtains, and gets the density of mean value as paint sample of 3 measurement results;
Then compare each density value size: density value is larger, the defoaming effect of corresponding latex paint defoamer is better; Density value is less, and the defoaming effect of corresponding latex paint defoamer is poorer.And then filter out the best latex paint defoamer of effect.
3, measurement result
Test result is as shown in table 11.Wherein, sample 1-9 is added with 9 paint samples of 9 kinds of different latex paint defoamers (latex paint defoamer 1-9) respectively in corresponding screening technique.ρ
1it is the density value measured for the 1st time; ρ
2it is the density value measured for the 2nd time; ρ
3it is the density value measured for the 3rd time;
be the mean value measured for 3 times; t
durationfor measuring duration; Described " measurement duration " comprise to often kind of sample from measured and measure and obtain time of the mean difference of density.
The measurement result of table 11 sample 1-9
As shown in Table 11, above-mentioned 9 kinds of sample paints containing latex paint defoamer, density is followed successively by from small to large: sample 6, sample 2, sample 8, sample 1, sample 9, sample 3, sample 4, sample 7, sample 5; The defoaming effect sequence of corresponding latex paint defoamer is also like this, and the defoaming effect of defoamer used in interpret sample 5 is best.The measurement duration of often kind of sample is 15min, and always consuming time is 2.25h.
Comparative example 3
1, screening technique
The construction method traditionally comparing latex paint defoamer defoaming effect compares the defoaming effect between in the same manner as in Example 39 samples (sample 1-9), and then the latex paint defoamer that screening defoaming effect is good.
Use the cement fibrolite plate that 9 blocks of identical grounds are 1m × 1m, adopt identical painting tool to carry out identical process to above-mentioned ground.Described process comprises criticizing scrapes 2 times putty, starts brushing latex paint (described latex paint is the sample paint of sample 1-9, respectively containing corresponding latex paint defoamer 1-9 in sample 1-9) after dry tack free after being polished flat by putty plate.For the brushing time and japanning amount that make each sample paint are consistent, be same one man operation and complete.Record foam time: after a sample painting brush is coated with, uses stopwatch record foam time immediately, and access panel face, till plate face does not have bubble, stops record, writes down the used time.Sample paint every 30min recoat once, and records foam time.According to above-mentioned steps, to all samples paint Parallel testing 3 times, the foam time of 3 times is respectively t
1, t
2, t
3, get the mean value that three times are measured the foam time of gained, be average foam time
then measurement time t is recorded
duration, described " measurement duration " comprises putty and criticizes the time scraping 2 times and obtain described average foam time, does not comprise time and recoat interval time of putty drying.
Foam time is shorter, and defoaming effect is better.
2, measurement result
Test result is as shown in table 12.
The measurement result of table 12 sample 1-9
As shown in Table 12, above-mentioned 9 kinds of sample paints containing latex paint defoamer, density is followed successively by from small to large: sample 6, sample 2, sample 8, sample 1, sample 9, sample 3, sample 4, sample 7, sample 5; The defoaming effect sequence of corresponding latex paint defoamer is also like this, and the defoaming effect of defoamer used in interpret sample 5 is best.The measurement duration of often kind of sample is 65min, and always consuming time is 9.75h.
From comparing of table 11 and table 12, in the defoaming effect process of more multiple latex paint defoamer, adopt the inventive method identical with the conclusion adopting classic method to obtain, but adopt the measurement duration of measurement duration far below classic method of the inventive method, and scrape 2 times putty because the inventive method eliminates criticizing in classic method, brushing latex paint (latex paint after dry tack free, i.e. sample paint) etc. step, the waste of the latex paint therefore in the inventive method is also much smaller than the waste in classic method.
Claims (10)
1. one kind is screened the method for latex paint defoamer, it is characterized in that, what, weight identical at composition was identical does not contain in the latex paint paint sample of defoamer, add the different latex paint defoamers that weight is identical respectively, density measurement is carried out to obtained latex paint, measured density is larger, illustrates that the defoaming effect of latex paint defoamer used in this latex paint is better.
2. method according to claim 1, is characterized in that, said method comprising the steps of:
A () makes not containing the latex paint paint sample of defoamer;
It is stand-by that b latex paint paint sample that step (a) obtains by () is divided into some parts, adds the different latex paint defoamers that weight is identical in each part respectively;
C each part paint sample that () will obtain after step (b) process, stirs same time, then carries out density measurement respectively to it under identical speed of agitator.
3. method according to claim 1 and 2, is characterized in that, carries out density measurement with density cup, and preferably, described density cup is 100ml density cup.
4. the method according to any one of claim 1-3, is characterized in that, the addition of described latex paint defoamer is 0.2% ~ 0.5% of every part of paint sample weight.
5. the method according to any one of claim 1-4, is characterized in that, when measuring density, temperature is 25 DEG C.
6. the method according to any one of claim 2-5, is characterized in that, in described step (c), speed of agitator is 600-800r/min, and mixing time is 5-10min; Preferably, in described step (c), speed of agitator is 700r/min, and mixing time is 8min.
7. the method according to any one of claim 2-6, is characterized in that, in described step (c), described stirring dispersion machine carries out.
8. method according to claim 7, is characterized in that, the dispersion impeller diameter of described dispersion machine is 50mm.
9. the method according to any one of claim 1-8, is characterized in that, to the mensuration of each part paint sample density, at least repeats survey 3 times.
10. test the method for the defoaming effect of defoamer in latex paint for one kind, it is characterized in that, identical to other composition, weight is identical but the latex paint that contained latex paint defoamer is different carries out density measurement, measured density is larger, illustrates that the defoaming effect of latex paint defoamer used in this latex paint is better.
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| CN115337679A (en) * | 2022-08-05 | 2022-11-15 | 美康生物科技股份有限公司 | Method for screening defoaming agent for in-vitro diagnostic reagent |
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| 中华人民共和国国家质量监督检验检疫总局 等: "《GB/T 21089.1-2007 建筑涂料水性助剂应用性能试验方法 第1部分：分散剂、消泡剂和增稠剂》", 11 September 2007 * |
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| 郭纬 等: "在涂料中使用国产消泡剂与进口消泡剂消泡效果试验", 《广东造纸》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115337679A (en) * | 2022-08-05 | 2022-11-15 | 美康生物科技股份有限公司 | Method for screening defoaming agent for in-vitro diagnostic reagent |
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