Styrene-acrylic emulsion is a kind of polymer emulsion, the main component is styrene-acrylic, which is obtained by free-radical polymerization of styrene-acrylic monomer. Styrene-acrylic emulsion can be used to prepare various polymer materials, such as coatings, adhesives, paper coatings, asphalt modifiers, etc. It has high durability, chemical resistance, and UV resistance. Therefore, it has been widely used in construction, automobiles, textiles, electronics and other fields.
Detection performance
The following are the common performance parameters and brief descriptions that need to be tested for styrene-acrylic emulsion, as shown in the following table:
| performance parameter | A brief description |
|---|---|
| Solid content | Non-volatile components in coatings as a percentage of total weight |
| viscosity | The viscosity of the coating has an important influence on the coating effect and construction performance |
| Particle size distribution | Particle size distribution in styrene-acrylic emulsion |
| pH value | The pH of styrene-acrylic emulsion has an important influence on the stability and performance of coatings |
| Adhesion | Adhesion of paint to substrate surface |
| Durability | The weather resistance, wear resistance, chemical resistance, etc. of the coating have an important impact on the service life and performance of the coating |
| Emulsion Stability | Stability and dispersibility of styrene-acrylic emulsion during storage, transportation and use |
Detection method
The following is a detailed description of the test methods for common performance parameters that need to be tested for styrene-acrylic emulsions:
Solid content: Dry the paint sample at about 105°C to constant weight, and calculate the ratio of the mass of non-volatile substances to the mass of the total sample.
Viscosity: Use a device such as a Rotational Viscometer or a refractometer to measure how viscous the paint is.
Particle size distribution: Use a particle size analyzer to measure the size distribution of the particles in the styrene-acrylic emulsion.
pH value: Use equipment such as a pH meter to measure the pH of the coating to evaluate the stability and performance of the coating.
Adhesion: Use Tensile Testing Machines, shear testing machines and other equipment to measure the adhesion of the coating to the surface of the substrate.
Durability: By simulating exposure and abrasion tests in actual use environments, etc., evaluate the weather resistance, abrasion resistance, chemical resistance, etc. of the coating.
Emulsion stability: By analyzing the stability and dispersibility of the styrene-acrylic emulsion during storage, transportation and use, the emulsion stability of the paint is evaluated.
Beichao reminds you: Different performance parameters may require different testing methods and equipment, and there may be some industry standards and specifications. For the performance testing of styrene-acrylic emulsions, corresponding testing methods and standards should be selected according to actual needs. At the same time, strict control of test conditions and standardized operations are required during the experiment to ensure the accuracy and reliability of the test.
