additive

Additives play a vital role in paints and coatings, they can significantly improve the performance of coatings, improve the quality of painting and productivity, and give coatings special functions. The following are the specific roles of additives in paints and coatings:

I. Improvement Of Coating Production Process

1. wetting agent and dispersant: these additives can effectively depolymerize pigment aggregates and promote their dispersion into paint in the original particle state, so as to prevent the problems of floating color and blooming, sinking and gloss decline. At the same time, they can also shorten the grinding time of pigment slurry and improve the production efficiency.
2. emulsifier: it plays the role of emulsification in the process of paint production, helping the components such as pigment and resin to disperse evenly in water or solvent.
3. antifoam agent: eliminate the foam in the process of coating production, avoid the effect of foam on the performance of coating.

Ⅱ. To Maintain The Stability Of Paint Storage

1. anti-settling agent, anti-skinning agent: these additives can prevent the phenomena of pigment precipitation and surface skinning during the storage process, and keep the uniformity and freshness of the paint.
2. preservatives, freeze-thaw stabilizers: to ensure that the paint is not affected by microbial erosion and low temperature during storage and transportation, to extend its service life.

Ⅲ. Prevention Of Paint Film Problems

1. adhesion promoter: enhance the adhesion between the coating film and the substrate, improve the firmness of the coating.
2. Floating color bloom preventive agent: prevent the paint film from floating color bloom and other problems in the process of formation, to ensure the integrity and beauty of the paint film.

Ⅳ.Improvement Of Coating Construction Performance

1. thixotropic agent, anti-sagging agent: these additives help to improve the fluidity of the coating, making it easier to construct and reducing the construction problems such as sagging.
2. leveling agent: improve the leveling of the coating, make the surface of the coating smoother and more uniform, reduce brush marks and unevenness.

Ⅴ.Improve The Quality Of Coating Film

1. drying agent, curing promoter: these additives can accelerate the drying and curing speed of the coating film, improve construction efficiency.
2. photosensitizers, photoinitiators: used to promote the light curing reaction of UV coatings, improve the hardness and abrasion resistance of the coating film.
3. plasticizer: increase the toughness of the coating film, improve the flexibility and impact resistance of the coating film.

Ⅵ. Give The Paint Special Function

1. ultraviolet absorber, light stabilizer: these additives can absorb or reflect ultraviolet rays, prevent the film from discoloration and cracking due to ultraviolet irradiation, and improve the weather resistance of the film.
2. flame retardant: reduce the flammability of coatings and improve the safety of coatings.
3. antistatic agent: prevent the paint from generating static electricity in the process of using, protect the coating equipment and personnel safety.
4. anti-mold agent: inhibit the growth of mold on the coating film, keep the coating film clean and beautiful.

In summary, additives play a vital role in paints and coatings. They can not only improve the production process and storage stability of the paint, but also improve the construction performance and film quality of the paint, and give the paint special functions. Therefore, the selection and matching of additives are crucial in the formulation design and production process of paints and coatings.