Ability of a coating to resist degradation due to mechanical wear by hard
and rough objects (mechanical erosion) thanks to the ability to dissipate
the applied mechanical energy. Abrasion resistance can be enhanced by incorporation of surface modifying
additives (see Surface
Material used in abrasive blasting to remove surface contaminants. Examples
of abrasive media are sand, iron shot, crushed iron slag, glass beads, or
Syn. Vulcanizing agent
Compounding material used in small amounts with a vulcanizing agent to increase
the speed of vulcanization, of a
chemical reaction. Accelerators are often used in the coating industry
to hasten the curing of a coating system.
Additive neutralizing and absorbing hazardous acid spills.
Aqueous dispersion of acrylic resins.
Resin made by the polymerization of acrylic monomers such as acrylates (Methyl, Ethyl, Butyl) or
Curing agent of a two pack coating system.
Degree of attachment between a coating film and
the underlying material to which it is in contact. The two
surfaces are held together by interfacial forces which may consist of valence
forces or interlocking action.
Material used to improve adhesion
between materials. May be used in two different modes:
by pre-treatment of a substrate, and as a component in coating formulation
capable of enhancing adhesion durability due to the improvement in substrate
wetting and formation of chemical bonds across the film/substrate interface.
Syn. Bonding agent
Not to be confused with absorption, adsorption is the build up of a molecule at
a surface. Adsorption generally occurs because different parts of a molecule
have an affinity for the two different phases on either side of the interface.
Syn. Physical adsorption
Change of a material with time under defined environmental conditions, leading to
improvement or deterioration of properties. Addition of Antioxidants,
UV / Light stabilizers, and so on, allows
an improvement of aging properties.
Ability to resist to various changes without
This stability can be improved by using
dispersing agents which
create repulsion forces.
Perforated housing for directing the atomizing air at the head of a spray
Syn. Air Nozzle
Form of curing a coating (the most common one) by oxidation
or solvent evaporation by simple exposure to air without heat or catalyst.
Velocity of air-drying depends on the concentration and structure of double-bonds
in the binder, the right selection of the drier (or drier system), temperature,
and film thickness.
Paint defect due to the incorporation of air bubbles into applied coating
films during the application process and holding air bubbles inside the film
due to a sufficiently high film viscosity. Air entrapment can be suppressed
by introduction of substrate
wetting agents or by the reduction of application viscosity.
System of applying paint by passing the paint, under high pressure, through
a nozzle and by atomizing it (broking into droplets) when it enters the lower
Aqueous liquid which has a pH value of between 7 and 14.
Syn. Base or Caustic material
Resin formed by the condensation of polyhydric alcohols with polybasic acids. May be regarded as
complex polyester (thermoset). Widely
used in general purpose
Coating defect: surface defects of a coating film having the wrinkled appearance of
Room temperature or the existing temperature of the surroundings.
Organic compound that contains a carbonyl group bound to nitrogen. -CON- (C
double bonded to O)
Thermosetting resin manufactured from amino compound and
formaldehyde. Amino resins are often used as curing agents for epoxy coatings.
Additive used to lessen the adhesion of coated surfaces to another surface. Acts by producing a slight
roughening of the surface. Are typically finely divided, solid minerals, but
some are waxes.
Syn. Surface conditioner
Additive used to prevent crater formation on the paints film.
Compounding material used to retard deterioration caused by oxidation, ozone, light and
Note: Antidegradant is a generic term for such additives as Antioxidants,
Antiozonants and UV / Light stabilizers.
Anti-flex cracking agent
Compounding material used to retard
cracking caused by cyclic deformations.
Additive preventing floating/flooding defects in coating applications.
Anti-foaming agent (foam suppressant)
See Foam control
agent and Defoamer
Additive used to prevent gelling in solvent or water-based coatings. Anti-gelling
agents can be metal-organics, polyphosphates, active organic solvents... .
Compounding material used to retard deterioration of coating films caused by oxidation,
heat exposure... Usually based on molecules
that will scavenge free radicals as they are formed.
Different types are available: phenolic compounds, primary and secondary amines...
Additive used to protect a polymer against the effects of ozone-induced degradation.
Rheological additive used to prevent sagging
in wet coatings where it increases the viscosity.
Additive that impedes sedimentation of pigments, extenders and fillers by
imparting increased low shear viscosity or a small yield
value to liquid paints.
Substance added to a material to prevent or retard the processes of oxidation
or polymerization which result in the formation of an insoluble skin on the
surface of the wet coating.
Additive which decreases the slip of surfaces. Used to eliminate the sliding of parallel
film surfaces over each other or the sliding
of film surfaces over substrates.
Syn. Surface conditioner
Additive which increases the surface conductivity of coatings and which
minimizes static electricity (charge build-up, dust collection).
Main families of antistatic agents are: Fatty acid esters, Ethoxylated amines,
Quaternary ammonium compounds...
Coating used in applications for interior or exterior surfaces
Black resinous material of petroleum origin.
Airless system that uses small amounts of air to help atomize the paint
in conjunction with airless spray. Used to get rid of the nagging problem
of "Rabbit Ears".
Formation of tiny droplets of liquid as in the paint spraying process.