Issues to note when using waterborne paint dispersants

Issues to note when using waterborne paint dispersants

Waterborne paint plays an increasingly important role in the modern paint industry due to its environmental protection and low volatile organic compound (VOC) emissions. In the preparation and application of waterborne paints, waterborne paint dispersants, as key additives, play a vital role in improving the dispersibility, stability and construction performance of paints. However, there are also some issues that need attention when using waterborne paint dispersants. This article will popularize these issues for you to help you better understand and apply waterborne paint dispersants.

1. Choose the right dispersant

Understand the application scenario: According to the specific application scenarios of waterborne paints (such as interior decoration, exterior wall painting, automotive painting, etc.) and performance requirements (such as gloss, weather resistance, water resistance, etc.), choose the right type of dispersant. Different application scenarios may have different performance requirements for dispersants.

Pay attention to dispersion performance: High-quality dispersants should have good dispersion effects, enabling pigment and filler particles to be evenly and stably dispersed in aqueous media. When selecting, sample testing can be used to evaluate its dispersion performance.

Consider environmental factors: give priority to non-toxic, low-pollution, and biodegradable dispersant products to reduce the impact on the environment and human body.

2. Correct addition method

Stir thoroughly before use: Before adding water-based paint dispersants, the base paint should be fully stirred to achieve a uniform mixing state so that the dispersant can more easily play a dispersing role.

Choose the right way to add: Water-based paint dispersants are added to the paint system. If they are not ground or dispersed at high speed, the expected effect may not be achieved. Therefore, it is necessary to choose the right way to add according to the product instructions or professional advice, such as gradual addition, high-speed stirring, etc.

3. Control the amount of use

Add in moderation: The amount of dispersant used should be moderate. Excessive use will not only increase production costs, but may also affect the performance of the paint. The amount of water-based dispersant used for general pigments is between 0.5% and 1.5%, but the specific amount needs to be adjusted according to factors such as pigment type, specific surface area, and dispersion fineness requirements.

Avoid waste: Accurately measure during the addition process to avoid waste and unnecessary cost increases.

4. Pay attention to environmental conditions

Control pH value: Some water-based paint dispersants have certain requirements for the pH value of the solution, so they need to be adjusted according to the properties of the dispersant to maintain a suitable pH range.

Pay attention to the influence of temperature: Some dispersants are sensitive to temperature, and attention should be paid to controlling the temperature to ensure that the dispersant has the best effect.

5. Storage and preservation

Storage environment: Water-based paint dispersants need to be stored in a dry, cool, ventilated place, away from fire and organic matter.

Avoid mixing: Different types of dispersants cannot be mixed, otherwise they will interact with each other, reduce the dispersion effect or cause the quality of the paint to deteriorate.

6. Compatibility test

Compatibility with other ingredients: When using water-based paint dispersants, it is necessary to pay attention to its compatibility with other ingredients (such as resins, additives, etc.). Good compatibility can avoid adverse reactions or affect the performance of the final paint.

Sample test: Before formal use, it is recommended to conduct sufficient compatibility testing and sample testing to ensure the compatibility of the dispersant with the paint system.

7. Pay attention to the quality and purity of dispersants

Ensure that the quality and purity of the water-based paint dispersants used meet the requirements to avoid affecting the dispersion effect and performance of the paint due to dispersant quality problems.

8. Avoid excessive use of dispersants

Although dispersants can improve the dispersibility and stability of paints, excessive use may lead to a decrease in paint performance, such as increased viscosity and reduced gloss. Therefore, the amount of dispersants should be strictly controlled during use.

9. Pay attention to the safety of dispersants

Some water-based paint dispersants may cause harm to the human body and the environment, so necessary safety measures need to be taken during use, such as wearing protective masks, gloves, etc., and comply with relevant environmental protection regulations.

Conclusion

Water-based paint dispersants play an important role in improving the performance, stability and construction performance of paints. However, the above issues also need to be paid attention to during use to ensure the effectiveness and safety of dispersants. By rationally selecting dispersants, correctly adding, controlling the amount used, paying attention to environmental conditions, properly storing and keeping, and conducting compatibility tests, the potential of water-based paint dispersants can be fully utilized to contribute to the development of the paint industry.