Coating Terms

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1) Organic coating material that contains coloring substances called pigments; 2) Organic coating film that contains pigments and is already coated on a surface. (Note: Most of the time the term “paint” is used in place of “organic coating”, since it is the most widely used organic coating)
“Destructive test” equipment used to determine the layer thickness values of different layers in a coating system separately by punching a conical hole in the paint film and observing the layers with a scaled magnifier. A paint borer consists of a right triangle shaped steel knife rotating around its perpendicular edge and a scaled magnifier.
Auxiliary material used to remove the dried coating film from the surface. Paint removers contain strong solvents gelled by various binders and additives, and provide removal of the coating film by inflating/swelling effect of solvents. Paint removers should be miscible with water to allow rinsing of the swelled coating.
Coated surfaces, giving a gloss value over 80 when measured at 60° with a glossmeter, are called high gloss paints.
Coatings containing binders that are soluble in organic solvents.
Coatings containing binders that are soluble in organic solvents.
Paint especially designed and produced to give a wrinkled appearance. Wrinkled paints are designed so that the upper surface of the wet paint dries faster than the overall film.
Paints produced using latex binders which are aqueous emulsions of solid polymer particles.
General name of paints, having glossy surfaces as newly sandblasted because of the aluminium pigment flakes in their composition.
Putties, primers and top coats used for painting partly or in full if an accident happens or a scratch occurs on the car in the assembly line. Plastic parts, seats made of fibers and polymeric foams and other non heat resistant accessories, do not allow the exposure of the car to temperature above 80°C. Therefore, car repair paints should be dried and cured below 80°C. On the other hand, to eliminate color and gloss differences between the painted part and the whole car, during the assembly line and throughout the service-life of the car, the resin and pigments used in repair paint should have similar durability as the OEM coating.
Destructive measuring device used to determine the thickness of paint film by incising a V-groove through the film and observing the thickness with a microscope bearing a measuring scale.
A simple paint application tool with a rolling cylindrical core. They are preferred because of their time efficiency. Application viscosity in roller applications should be in the same range of that in brush application. The roller frame is made of fibre reinforced plastic or metal. The pile fabric of roller cover is made of polyester, nylon, mohair or lamb’s wool. Fibre length of fabric is between 5 mm and 20 mm. Furthermore, relatively less skill is required with roller applications.
Paints in which cellulose nitrate is the main binder. Cellulosic paints cure by evaporation of solvent. The flexibility of cellulosic paints are increased by adding alkyd resins and plasticizers into their formulation.
Paints produced using synthetic resins as binders instead of natural oils or resins, during the first period of industrialized paint production. Since, first resins that became widespread were alkyd resins, historically, synthetic paints and alkyd resin terms are used interchangeably. Although most of the paint resins used nowadays are synthetic, use of synthetic paint term for defining alkyd resins is still common.
The last coat applied in a coating system. Since topcoats are exposed directly to the outdoor conditions, they are expected to have certain durability.
Paints in which waterborne emulsion polymers are used as binders.
Water reducible paints contain water reducible polymers as well as water miscible solvents such as alcohol or glycol generally below 15%. Water reducible paints, can be reduced using water before application. They are commonly misnamed as water soluble paints.
Paints applied to various agricultural machines, tankers, valves, tanks, plows and other agricultural equipment in addition to some parts of agricultural hand tools like shovel, scissor and handsaw. Paints for agricultural tools are designed to have high resistance against wear, chemicals and corrosion.
In this paint production approach, a resin with a high compatibility range is selected as main dispersion resin and different pigments are dispersed separately to a certain grain size using this resin. Color matching is performed using this pigment pastes and letdown is done by adding remaining ingredients after a proper calculation. The main advantages of this approach are, better optimization of capacity of production equipment (especially the mills) and storage areas in addition to reduced production times. It is achieved by producing common pigment pastes, which can be used in various product groups owing to the compatible resin used. The drawback of this approach is the difficulties in sensitive color matching because of highly concentrated pigment pastes in addition to the possibility of decrease in color strength, gloss as well as haze and formation of particles due to pigment flocculation during storage.
To complete the electrical circuit during wet paint electrostatic applications, the paint droplets reaching the surface to be coated should transfer the charge to the ground. Thus, the conductivity of the paint should be adjusted using proper solvents and additives.
Test to determine the properties that a paint should have in the package (i.e., viscosity, solids%, density, fineness of grind , settling stability etc.)
Density of paints in package or application viscosity. It is measured in g/ml units. Paint density is commonly measured with pycnometer. Pycnometers are constant volume cups made of aluminium or stainless steel.