The stabilising role and effect of HPMA (hydrolysed polymaleic anhydride) in coatings is mainly reflected in the following aspects:
I. Stabilising effect
- Disperse pigment and filler:
- As a dispersant, HPMA can effectively disperse pigment and filler particles in coatings to prevent them from aggregation and precipitation, so as to maintain the uniformity and stability of coatings.
- Through the interaction between the functional groups on its molecular chain and the surface of pigments and fillers, HPMA can reduce the surface tension between particles and make them better dispersed in the coating system.
Improved pigment dispersion:
- The dispersing effect of HPMA helps to improve the dispersion of pigments, enabling pigment particles to be more evenly distributed in the coating, thus improving the colour vibrancy and hiding power of the coating.
Prevent pigment settling:
- During the storage and use of the paint, HPMA can prevent the pigment particles from settling and maintain the stability and consistency of the paint.
Second, the effect
- Enhancement of paint quality:
- Due to the stabilising effect of HPMA, the quality of the coating is improved, which is manifested in the improvement of the gloss, flatness and adhesion of the coating film.
Improvement of construction performance:
- The addition of HPMA can improve the construction performance of coatings, such as improving the fluidity and wettability of coatings, making coatings easier to apply and evenly distributed.
Extend the service life of coatings:
- By preventing the settling and aggregation of pigments and fillers, HPMA helps to extend the service life of coatings and reduces coating failures caused by particle aggregation.
Environmentally Friendly:
- As an environmentally friendly additive, the use of HPMA meets the requirements of the modern coatings industry for environmental performance, and helps to reduce environmental pollution during the production and use of coatings.
Application examples
In the coating industry, HPMA is often used as pigment dispersant, stabiliser and thickener. By adjusting the dosage and formulation of HPMA, coating products with different properties and uses can be prepared, such as architectural coatings, automotive coatings, industrial anticorrosion coatings and so on.
In summary, HPMA has a significant stabilising effect in coatings, which can enhance the quality and performance of coatings, improve the construction performance and extend the service life of coatings. At the same time, its environmental performance is in line with the development trend of modern coating industry.