Paint base refers to the substance used as the base and carrier in the paint, including resins, solvents, fillers, additives, etc. Paint binder is the main source of paint properties and has an important impact on the quality and performance of paint. Usually, the coating base material needs to have certain adhesion, fluidity, durability, chemical stability and other characteristics to ensure the effect and durability of the coating during application. Common coating base materials include organic solvents, water-based resins, solvent-based resins, powder coatings, etc.
Detection performance
The performance testing items of coating base material vary according to the specific base material type, generally including the following aspects:
Physical properties: density, viscosity, fluidity, drying time, etc.
Chemical properties: chemical stability, acid and alkali resistance, water resistance, etc.
Mechanical properties: hardness, strength, modulus of elasticity, etc.
Thermal properties: high temperature resistance, thermal conductivity, etc.
Optical properties: transparency, reflectivity, etc.
Electrical properties: dielectric constant, conductivity, etc.
The following is a brief description of the testing items and methods of common performance parameters of paint base materials:
| performance parameter | Test items | Detection method |
|---|---|---|
| physical properties | density | Density meter measurement |
| viscosity | Measure with a viscometer etc. | |
| fluidity | Judging by observing the flow of the sample on the inclined plate | |
| drying time | After drying the sample, observe the drying time | |
| chemical properties | chemical stability | Exposing samples to specific environments to observe their chemical stability |
| Acid and alkali resistance | Expose to acid and alkali environment, observe its acid and alkali resistance | |
| water resistance | Soak the sample in water to observe its water resistance | |
| mechanical properties | hardness | Use Hardness Tester and other equipment to measure |
| strength | Through tensile and compressive tests on samples, it is obtained | |
| Elastic Modulus | Measured with equipment such as modulus of elasticity | |
| thermal performance | High temperature resistance | Expose the sample to a high temperature environment to observe its high temperature resistance |
| Thermal Conductivity | Measure with equipment such as thermal conductivity meter | |
| optical properties | transparency | Measure with equipment such as a translucent meter |
| Reflectivity | Measure with equipment such as a reflectance meter | |
| electrical properties | Dielectric constant | Measure with equipment such as a dielectric constant Tester |
| Conductivity | Measure with a conductivity meter and other equipment |
Detection method
The performance testing methods of paint base materials vary according to the type of base material and performance parameters. The following takes several common performance parameters as examples to briefly introduce the detection methods of paint base materials:
Density: usually use a density meter for measurement, put the sample into the density meter, and read the density value on the display.
Viscosity: It can be measured by various methods, among which the rotary viscometer is commonly used, and the direct stretching method, trickle method, etc. can also be used.
Chemical stability: Expose the sample to a specific environment, such as high temperature, high humidity, acid and alkali, etc. to conduct exposure tests, and observe the changes of the sample in different environments, such as color changes and physical properties.
Hardness: use Hardness Tester or Rockwell Hardness Tester and other equipment to measure.
Strength: Use Tensile Testing Machine or compression testing machine and other equipment to measure, place the sample in the equipment, apply the corresponding force, measure the change of the sample under different forces, and obtain its strength value.
High temperature resistance: After exposing the sample to a high temperature environment, such as in a constant temperature oven for a certain period of time, observe the changes of the sample, such as weight change, appearance change, etc.
Transparency: Measure with equipment such as a translucent meter, place the sample in the translucent meter, measure the intensity of light passing through the sample, and obtain the transparency of the sample.
Electrical properties: use dielectric constant Tester, conductivity meter and other equipment to measure, put the sample in the equipment, conduct electrical performance test, and obtain corresponding performance parameter values.
NBCHAO reminds you: The performance testing methods of paint base materials vary according to the type of base material and performance parameters, and there may be some industry standards and specifications. For the performance testing of paint base materials, the corresponding testing methods should be selected according to actual needs. At the same time, in order to ensure the accuracy of the test results, the test equipment should be calibrated and maintained before the test.
