Coating used to isolate a coating system from the surface to which
it is applied or from a previous coating. Permits to increase adhesion
or to insure compatibility.
Coating defect caused by evaporation: polygonal cell patterns, micro-separation
in the film due to surface tension gradients. This defect occurs in paints with low viscosity, fast solvent
and high film thickness.
Non-volatile portion of the vehicle of a coating which holds together the
Material or additive added to greatly delay or stop the growth of bacteria. Protects
liquid paints, dry coatings and production
sites from biodegradation.
Changes caused by micro-organisms
(bacteria, algae, fungi): viscosity loss, odor spoilage,
Coal tar or asphalt based coating material usually used in thick films.
Coating defect: fading of a color induced by exposure to chemicals or ultraviolet light exposure.
Coating defect: diffusion of pigment from a
lower coat of paint into an upper coat. This diffusion causes a color change.
Coating defect: formation of blisters in coating by the local loss of adhesion
and lifting of the film from the underlying substrate.
Additive which can block polymerization catalysts.
Coating defect: haziness of coating surfaces caused
by the exudation of a component of the coating such as
oil plasticizer, or noncrosslinked coating constituent when the coated
part is exposed to a cycle of heat, humidity,
Coating defect: whitening (milky appearance) of the surface of a coating caused
by rapid solvent evaporation or the presence of excessive moisture during
the curing process.
Additive which controls wet film thickness and allows thick layer applications.
Attachment between a coating film and the surface to which it is applied.
Mixing of coatings by pouring from one container to another.
Formation of a coating film over a depression.
Lack of resistance to cracking or breaking of a coating when bent or flexed.
Coating defect: strikes left after application of the paint by a brush. Due to
poor flow, levelling or substrate wetting. Frequent defect of latex paints or highly pigmented
Capability of a paint to be easily applied by brush (without brush-marks). Brushability is
influenced by paint rheology and open time.
Coating defect: bubbles of air or solvent vapor in the applied film. This
defect can be temporary or permanent.
Wet or dry film thickness of a coating.
Additive which maintains a required range of pH in aqueous compositions.
Coating defect: high and low spots in a coating surface caused by unwanted flowing that occurs
during curing. Caused by surface tension gradients that arise during curing.