Лако-красочные материалы — производство

The primary role of paints and coatings is to enhance appearance and protect the surface from environmental damage during their service life. Paints and coatings are used for a myriad of appli­cations, and hence their service environment and the degree of protection expected vary to a large extent. Since binders and resins are the actual […]

As mentioned in the previous chapter, resins are polymeric materi­als capable of forming useful films after application of coatings. For good film formation, a high MW resin is necessary. In general, in the paint and coating industry, two types of resins are used: (1) those with very high MW that are capable of forming useful […]

1.2 Introduction 1.2.1 Introduction to polymers In the previous chapter, binders or film formers were described as one of the most important components of paints and coatings. Bin­ders are essentially polymeric materials and thus presenting some concepts and definitions related to polymers will be useful in under­standing the different types of binders used in paints […]

Solvents are primarily used to control viscosity of the coatings for acceptable application. These are essentially volatile compounds that must evaporate from the film after application. Solvents also affect such properties as flow and leveling, drying time, gloss etc. A wide range of organic solvent types are used in coatings. Many of these solvents are […]

In order to facilitate manufacturing, storage and satisfactory applica­tion and to improve durability and performance, it is essential to incor­porate special additives to coatings. Additives are compounds added in small quantities (up to ~5 % by weight) that substantially improve or modify properties of coatings. These compounds include wetting and dispersing agents, which help disperse […]

Pigments are finely divided colored (or white) insoluble particles having a high refractive index, typically >1.70. Pigments, when uni­formly dispersed in the resin (medium), impart color and opacity to the cured film. Thus, color and opacity are the primary functions of pigments. In addition, some pigments (for example, chrome pigments, zinc phosphate pigments) exhibit functional […]

Resins (film formers or binders) are the most important components of coatings since many important properties of dry films, such as hardness, adhesion, chemical and solvent resistance and durability, are primarily dependent on the nature of the resins used. After application of coatings, resins form useful films by a variety of phy­sical and/or chemical mechanisms […]

We now know the primary functions of paints and coatings and their importance in enhancing and protecting many industrial and consumer products. Now let’s look at what paints and coatings are composed of. In general, paints and coatings are liquid mixtures that are applied onto the surfaces of products using a brush, roller or spray. […]

The earliest known use of paints dates back to the prehistoric era. Humans, by nature, have a sense of aesthetics and there is con­siderable evidence of human beings using some type of paint for decoration of their dwellings or their bodies. The Greek and Roman civilizations (from ~ 4000 BC) used paints to decorate buildings, […]

1.1 Why paints and coatings? Looking around, we find paints and coatings virtually everywhere. We see paint on the walls of our homes or offices, and on furniture, refrigerators, washing machines, and toasters with nice colorful finishes. Outdoors, we see cars with an increasing variety of coa­tings. Building exteriors, equipment, bridges, pipelines, superstruc­tures, and monuments […]