CN109782078B - Method for rapidly testing antistatic property of antistatic floor paint - Google Patents
Method for rapidly testing antistatic property of antistatic floor paint Download PDFInfo
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- CN109782078B CN109782078B CN201910004292.9A CN201910004292A CN109782078B CN 109782078 B CN109782078 B CN 109782078B CN 201910004292 A CN201910004292 A CN 201910004292A CN 109782078 B CN109782078 B CN 109782078B
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Abstract
The invention discloses a method for rapidly testing the antistatic property of antistatic floor paint, which comprises the following steps: testing antistatic primer and antistatic finish; by adopting the method for rapidly testing the antistatic property of the antistatic floor paint, the antistatic testing period of the antistatic floor paint can be shortened from 168h to about 2h, the combined test of volume resistance and surface resistance can be realized, the primer and finish paint are tested on the same plate, and the factory testing efficiency is obviously improved. Meanwhile, the detection method is similar to actual site construction, the antistatic property and the matching property of a product leaving a factory are ensured to be consistent with those of a construction site, and unqualified system antistatic property caused by independent detection of primer or finish is prevented. The method for rapidly testing the antistatic property of the antistatic terrace paint combines the surface resistance and the volume resistance into one board for testing, and the primer and the finish paint are tested on the same board.
Description
Technical Field
The invention relates to a method for rapidly testing the antistatic property of antistatic floor paint.
Background
The antistatic floor paint is a two-component paint prepared from resin, pigment and filler, conductive material, diluent and assistant in a certain proportion and curing agent, has the special antistatic function, and is suitable for floor and wall coating systems in all places needing antistatic, such as electronics, communication, computers, precise instruments, powder, organic solvents, gas, gunpowder storehouses and the like. The antistatic floor paint generally takes epoxy resin as a carrier, has all excellent performances of epoxy floor paint, can quickly discharge electrostatic charges, and has lasting antistatic effect. The epoxy floor paint in the market is mainly solvent type and solvent-free type, and the water-based epoxy floor paint rises increasingly along with the increasing strictness of the environmental protection requirement. Polyurethane and other types of antistatic floor paint are rare. The antistatic terrace is divided into a finish paint and a primer according to the application, and is divided into an electrostatic conduction type and an electrostatic dissipation type according to the antistatic performance.
The surface resistance and the volume resistance of the electrostatic conductive floor paint surface coating or coating system in GB/T22374 and 2018 floor coating materials meet the requirements: 5X 104Resistance value less than or equal to omega < 1 × 106Omega; the surface resistance and the volume resistance of the static dissipative floor paint top coating or coating system both require: 1X 106Resistance value less than or equal to omega < 1 × 109Omega. The plate making and curing conditions are shown in Table A.
Table a national standard method test plate requirements
The antistatic numerical value of finish paint is required in the general Specification of SJ/T11294 and 2003 antistatic terrace paintThe surface resistance and the volume resistance of the primer are both required to be less than 1 multiplied by 10 in accordance with GB/T22374-2018 floor coating material6Omega. The test method of the general specification SJ/T11294-. Although the maintenance cycle is not specifically described, the maintenance cycle is generally 168 h.
GB/T22374 and 2018 floor coating materials do not make factory inspection project requirements on antistatic property, and SJ/T11294 and 2003 and antistatic floor coating general specifications require as factory inspection items. The anti-static floor paint has the following execution standards, and manufacturers generally execute the latter, and generally need to test the anti-static property in order to ensure the anti-static property of products to be subjected to factory inspection. However, even if the maintenance period of the test panel is not a week, if the test and calculation are carried out according to the time after the test panel is completely dried, the test panel generally needs to be maintained for 1-2 days, so that the detection efficiency is seriously reduced, the product delivery time is affected, and the product cannot be delivered in time.
In addition, antistatic surface resistance and volume resistance use insulating substrate and metal substrate test respectively, and it is more loaded down with trivial details respectively to make the board on the one hand, and on the other hand often appears surface resistance qualified and volume resistance off-the-shelf condition during the inspection, and especially static dissipation type product problem is in abundance. The way of the separate test is different from the way of the actual construction directly on the cement ground. If the volume resistance is qualified according to the national standard method, the surface resistance of the coating system is likely to be too large and unqualified, so that common manufacturers only test the surface resistance and firstly ensure that the surface resistance is qualified. The last problem is that the antistatic properties of the coating system cannot be guaranteed by testing the primer or the topcoat alone. The resistance value can increase after priming paint and finish paint are used in a matched manner, and the resistance value is usually larger and unqualified after matched construction due to the qualified priming paint and the qualified finish paint close to the upper limit of antistatic property. The antistatic property tested by the national standard method is defective, and particularly, the volume resistance is obviously low.
Therefore, in order to solve the problems of efficiency and accuracy of the inspection, it is necessary to invent a method for rapidly detecting the antistatic property.
Disclosure of Invention
The invention aims to overcome the problems and provide a method for rapidly testing the antistatic property of the antistatic floor paint. By adopting the method, the antistatic property of the standard specified detection period 168h can be shortened to about 2h, and the antistatic property of the coating system is qualified.
The invention discloses a method for rapidly testing the antistatic property of antistatic floor paint, which comprises the following steps:
A. testing of the antistatic primer:
firstly, respectively transversely and vertically sticking a special anti-static floor paint copper strip at the middle position of a test plate to form a cross shape, wherein 4 tail ends of the cross copper strip respectively exceed the edge of the test plate by at least 5cm, then scraping and coating a primer, and the resistance between the copper strip and the surface of a primer paint film is volume resistance;
then, the test board coated with the primer paint film is naturally dried for 1h under the standard conditions specified in GB/T9278-; finally, baking for 0.5-1 h at 48-52 ℃ until the product is dried (the baking time is adjusted according to the product film thickness), testing according to a method specified in GB/T1410-1989 after cooling, wherein the temperature and humidity of the test conditions are in accordance with GB/T9278-2008;
the invention improves the inspection efficiency by accelerating the drying of the paint film through high-temperature baking, but the baking is on the premise of not influencing the performances of the paint film such as antistatic property and the like. The primer conductive material generally takes conductive graphite as a main material, but the graphite powder is easy to float upwards when being baked, the longer the baking time is, the smaller the resistance value is, the higher the baking temperature is, the smaller the resistance value is, so the test plate should be maintained for 1h to be close to surface dry or semi-dry at least under the standard test conditions, the conductive graphite is baked after being basically shaped in a paint film, and the natural drying time of the waterborne antistatic primer is especially properly prolonged for at least 1 h.
The primer test plate in the method for rapidly testing the antistatic property of the antistatic floor paint needs to be shown in table 1.
Table 1 primer test panel requirements in the method for rapidly inspecting antistatic terrace paint antistatic property according to the present invention
B. Testing the antistatic finish paint:
firstly, coating finish paint on a test plate coated with primer in the step A, wherein the resistance between the copper strip and the surface of a finish paint film is the volume resistance of the system;
then, naturally drying the test board coated with the finish paint film for 0.5-1 h under the standard condition specified in GB/T9278-; finally, baking for 0.5-1 h at 68-72 ℃ until the product is dried (the baking time is adjusted according to the product film thickness), testing according to a method specified in GB/T1410-1989 after cooling, wherein the temperature and humidity of the test conditions are in accordance with GB/T9278-2008;
the invention uses the matching test of the priming paint and the finishing paint on the same plate to improve the inspection accuracy and ensure that the antistatic property of the coating system constructed on site is qualified. The conductive material of the finish paint is mainly conductive carbon fiber, and is not obviously affected by temperature as much as conductive graphite. The maintenance for 0.5 to 1 hour under the standard condition has two functions:
firstly, fully breaking foam, and preventing the appearance of a paint film from being influenced by the defects of volcanic holes, pinholes and the like caused by severe foam breaking due to direct baking;
secondly, the powder is shaped to prevent the viscosity from rapidly becoming low under the high temperature of direct baking, the pigments and fillers sink, the resin floats upwards to cover the conductive fiber, and the color and the antistatic property are influenced.
The requirements of a finish paint test plate in the method for rapidly testing the antistatic property of the antistatic terrace paint are shown in the table 2.
Table 2 top-coat test panel requirements in the method for rapidly inspecting antistatic terrace paint antistatic property of the present invention
Wherein the static dissipative finish paint corresponds to a test plate of the static dissipative primer; the static conductive finish paint corresponds to a test plate of the static conductive primer paint, and cannot be mixed.
The method for rapidly testing the antistatic property of the antistatic terrace paint is further optimized as follows:
the length of the primer paint film and the length of the finish paint film are more than or equal to 25cm, the width of the primer paint film and the width of the finish paint film are more than or equal to 15cm, and the lengths and the widths of the primer paint film and the finish paint film are not more than the lengths and the widths of the test boards.
The method for rapidly testing the antistatic property of the antistatic terrace paint is further optimized as follows:
the paint film area of the finish paint is less than or equal to that of the primer paint, so that the finish paint film is not contacted with the test board.
The method for rapidly testing the antistatic property of the antistatic terrace paint is further optimized as follows:
the knife coating of the primer and the topcoat is carried out using a wire bar or a wet film maker with a film thickness recommended or approximate to the recommended film thickness by the product manufacturer.
Because the graphite primer has strong thixotropy and poor leveling property, a lengthened wet film preparation device is recommended to be used for blade coating the plate, so that the phenomenon that the paint film of the wire bar plate has stripes to influence the antistatic property test and the surface paint plate manufacture is prevented.
Of course, the plate making method is not limited to the instrumental knife coating, and the roller coating or the batch coating can be carried out according to the recommended method, and the instrumental knife coating is only used for reducing errors caused by human beings and improving the accuracy and the detection efficiency.
The method for rapidly testing the antistatic property of the antistatic terrace paint is further optimized as follows:
the primer paint film is recommended to be prepared by blade coating along the long edge by using a wet film preparation device with the thickness of 150 mu m;
the thin coating in the finish paint film is recommended to be prepared by blade coating along the long edge by using a 250-micron wet film preparation device; thick coats are recommended to be prepared using a 500 μm wet film maker with knife coating along the long side.
The method for rapidly testing the antistatic property of the antistatic terrace paint is further optimized as follows:
the test board is A4 paper, and the board is preferably fiber cement board. The size of the test board is not limited to the size of a4, and can be adjusted as long as the size is not less than the standard requirement.
The method for rapidly testing the antistatic property of the antistatic terrace paint is further optimized as follows:
the number of the test panels is 3. For the product with the antistatic numerical value relatively parallel and stable in long-term test, the number of test plates for factory inspection can be reduced to one. The test voltage was set to SJ/T11159-. And baking the test board coating in a constant-temperature drying box.
Compared with the standard specified method, the method for rapidly testing the antistatic property of the antistatic floor paint can shorten the antistatic testing period of the antistatic floor paint from 168 hours to about 2 hours, can realize the combined test of volume resistance and surface resistance, and can obviously improve the factory testing efficiency by testing the primer and the finish on the same board. Meanwhile, the detection method is similar to actual site construction, the antistatic property and the matching property of a product leaving a factory are ensured to be consistent with those of a construction site, and unqualified system antistatic property caused by independent detection of primer or finish is prevented.
The method for rapidly testing the antistatic property of the antistatic terrace paint combines the surface resistance and the volume resistance into one board for testing, and the primer and the finish paint are tested on the same board.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. The simple improvement of the preparation method of the invention on the premise of the conception of the invention belongs to the protection scope of the invention.
The test objects in the examples of the present invention are as follows:
object 1: nippon ZF-F950W waterborne epoxy antistatic midcoat (primer), gallery Nippon paint, Inc.;
object 2: SP-1202 static conductive epoxy primer, Guangzhou Xiupo chemical coatings, Inc.;
object 3: nippon ZF-F953 antistatic epoxy self-leveling topcoat, gallery Fang Nippon paint GmbH;
object 4: SP-1103 static-conducting epoxy self-leveling finish paint, Guangzhou Xiupo chemical coating Co.
Example 1
A. Under the standard conditions specified in GB/T9278-; object 1 and object 2 were each drawn down with 3 test panels along each long side using a 150 μm wet film maker.
B. The test plate is naturally dried for 1h under the standard condition, baked for 0.5h at 50 ℃ until the test plate is completely dried, and the antistatic property is tested according to the method specified in GB/T1410-1989 after the test plate is cooled, and the result is shown in Table 3.
Example 2
A. GB/T9278-.
B. The test plate is naturally dried for 0.5h under the standard condition, baked for 1h at 70 ℃ until the test plate is completely dried, and the antistatic property is tested according to the method specified in GB/T1410-.
Comparative example 1
A. Under the standard conditions specified in GB/T9278 once again 2008, 3 test plates are respectively roll-coated on an asbestos-free fiber cement plate (insulating base material) with the size of A4 and an A4 tin plate (metal base material) according to the dosage of 0.1 kg/square meter on an object 1 and an object 2 respectively.
B. The test plates were maintained under standard conditions for 168h and then tested for antistatic properties according to the method specified in GB/T1410-.
Comparative example 2
A. Under the standard conditions specified in GB/T9278 + 2008, 3 test plates are respectively coated on an asbestos-free cement plate (insulating base material) with the size of A4 and an A4 tin plate (metal base material) in a way of troweling according to the dosage of 0.8 kg/square meter for the object 3 and the object 4 respectively.
B. The test plates were maintained under standard conditions for 168h and then tested for antistatic properties according to the method specified in GB/T1410-.
TABLE 3 antistatic test results (Unit: omega)
Remarking: resistance value<2×104And omega indicates that the actual result is lower than the lower limit of the test of the detection instrument.
As can be seen from Table 3, according to the test of the examples, the antistatic property of the electrostatic dissipative or conductive coating system was acceptable, the surface resistance and the volume resistance were similar, and the results were consistent with the results of the large-area construction site, and the surface resistance and the volume resistance of the target electrostatic dissipative coating system were (1-3). times.107Omega, the surface resistance and the volume resistance of the electrostatic conductive coating system are both (2-4) x 105Ω。
The comparative example according to the national standard method shows a large difference between the surface resistance and the volume resistance, which is mainly indicated by the significantly small volume resistance. If the volume resistance is qualified according to the national standard method, the resistance of the coating system is likely to be larger and unqualified, which indicates that the antistatic property tested by the national standard method is defective, and particularly the volume resistance is obviously lower.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; those skilled in the art should also realize that such equivalent variations, modifications, and alterations are possible in light of the above teachings without departing from the spirit and scope of the present invention; meanwhile, any equivalent changes, modifications and evolution made to the above embodiments according to the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The experimental method of the present invention, in which the specific conditions are not specified, is generally carried out under the conventional conditions or the conditions recommended by the manufacturers.
The various optimized technical schemes in the invention can be combined with each other unless otherwise stated.
The experimental procedures described in the specification and examples, which do not specify specific conditions, are generally carried out under the conditions which are customary or recommended by the manufacturers.
The various starting materials, reagents, components used in the present invention are, unless otherwise indicated, the corresponding starting materials commonly used in the art.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention.
Claims (6)
1. The method for rapidly testing the antistatic property of the antistatic floor paint is characterized by comprising the following steps of:
which comprises the following steps:
A. testing of the antistatic primer:
firstly, respectively transversely and vertically sticking a special anti-static floor paint copper strip at the middle position of a test plate to form a cross shape, wherein 4 tail ends of the cross copper strip respectively exceed the edge of the test plate by at least 5cm, then scraping and coating a primer, and the resistance between the copper strip and the surface of a primer paint film is volume resistance;
then, naturally drying the test board coated with the primer for 1h under the standard conditions specified in GB/T9278-; finally baking for 0.5-1 h at 48-52 ℃ until the material is dried, and testing the antistatic property according to the method specified in GB/T1410-;
B. testing the antistatic finish paint:
firstly, coating finish paint on a test plate coated with primer in the step A, wherein the resistance between the copper strip and the surface of a finish paint film is the volume resistance of the system;
then, naturally drying the test board coated with the finish paint for 0.5-1 h under the standard condition specified in GB/T9278-; finally baking for 0.5-1 h at 68-72 ℃ until the material is dried, and testing the antistatic property according to the method specified in GB/T1410-;
when testing the static dissipative antistatic property, the static dissipative finish paint corresponds to a test plate of the static dissipative primer; when testing the static conductive antistatic property, the static conductive finish paint corresponds to a test plate of the static conductive primer paint and cannot be mixed;
the area of the finish paint film is less than or equal to that of the primer paint film, so that the finish paint film is not contacted with the test board.
2. The method for rapidly inspecting the antistatic property of the antistatic floor paint according to claim 1, wherein the method comprises the following steps:
the length of the primer paint film and the length of the finish paint film are more than or equal to 25cm, the width of the primer paint film and the width of the finish paint film are more than or equal to 15cm, and the lengths and the widths of the primer paint film and the finish paint film are not more than the lengths and the widths of the test boards.
3. The method for rapidly inspecting the antistatic property of the antistatic floor paint according to claim 1, wherein the method comprises the following steps:
the blade coating of the primer and the finish paint is carried out by using a wire rod or a wet film preparation device with the film thickness recommended by a product manufacturer.
4. The method for rapidly inspecting the antistatic property of the antistatic floor paint according to claim 1 or 3, wherein the method comprises the following steps:
the primer paint film is prepared by blade coating along the long edge by using a wet film preparation device with the thickness of 150 mu m;
the thin coating in the finish paint film is prepared by blade coating along the long edge by using a 250-micron wet film preparation device; thick coats were prepared using a 500 μm wet film maker with knife coating along the long side.
5. The method for rapidly inspecting the antistatic property of the antistatic floor paint according to claim 1, wherein the method comprises the following steps:
the test panel is A4 paper in size.
6. The method for rapidly inspecting the antistatic property of the antistatic floor paint according to claim 1, wherein the method comprises the following steps:
the number of the test panels is 3.
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| CN100506931C (en) * | 2005-04-25 | 2009-07-01 | 上海秀珀化工有限公司 | Conductive epoxy resin lawn pigment and coating process thereof |
| CN207469672U (en) * | 2017-09-15 | 2018-06-08 | 漳州三德利油漆涂料有限公司 | Anti-skidding antistatic floor lacquer coat |
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