Paints
• Suyog Shrestha
• Swarna Jung Maden
• Utsab Karki
• Utsav Guragain
Paint is any liquid,
liquefiable, or
mastic composition It is most commonly
that, after used to protect,
application to a color, or provide
substrate in a thin texture to objects.
layer, converts to a
Paint
solid film.
Paint can be made or
purchased in many Paint is typically
colors—and in many stored, sold, and
applied as a liquid,
different types, such
as watercolor, but most types dry
into a solid.
synthetic, etc.
Composition
• Pigment - prime pigments to impart colour and
opacity • binder (resin) - a polymer, often referred to
as resin, forming a matrix to hold the pigment in place
• Extender - larger pigment particles added to improve
adhesion, strengthen the film and save binder
• Solvent (sometimes called a thinner) - either an
organic solvent or water is used to reduce the viscosity
of the paint for better application. Water-borne paints
are replacing some paints that use volatile organic
compounds such as the hydrocarbons which are
harmful to the atmosphere.
• Additives - used to modify the properties of the liquid
paint or dry film
In the most basic sense, the liquid component of a paint is
simply responsible for transporting the binder and pigment to the
substrate surface.
The main purposes of the diluent are to dissolve the polymer and
adjust the viscosity of the paint. It is volatile and does not
Thinner
become part of the paint film.
It also controls flow and application properties, and in some
cases can affect the stability of the paint while in liquid state. Its
main function is as the carrier for the non volatile components.
To spread heavier oils (for example, linseed) as in oil-based
interior house paint, a thinner oil is required. These volatile
substances impart their properties temporarily—once the solvent
has evaporated, the remaining paint is fixed to the surface
• The solvents used as the carrier in paints:
• Water
• White spirits (mineral turpentine spirits). White spirit
is a mixture of is a mixture of saturated aliphatic and
Types of
alicyclic hydrocarbons.
• Xylene is a pure aromatic solvent having benzene ring
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structure in its molecule (C8H10).
• Toluene is also a pure aromatic solvent with benzene
ring structure (C6H5CH3).
• Alcohols (n-butanol, isopropanol) are organic
compounds having a hydroxyl groups (-OH) bound to
the carbon atoms of an alkyl group.
• Ketones is an organic solvents, in which carbonyl
group (C=O) is bonded to two other carbon atoms.
• Filler acts as pigment extender .It
reduces the paint cost and also controls
the viscosity of paint
• Quartz sand (SiO2). Finely ground
quartz is a filler increasing the
abrasion resistance of the paints.
FILLERS
• Talc protects the substrate from the
penetrating water.
• Baryte (BaSO4) is a colorless or
white inorganic mineral having high
hardness and chemical resistance. It is
used as a reinforcing additive.
• Kaoline Clay is used in emulsion
paints as a gloss reducing additive.
• Limestone (calcium carbonate,
CaCO3) is used in emulsion paints as a
filler extending expensive pigments.
Water based paint :
CLASSIFICATION
OF PAINT
Oil based paint
• The paints formulated on the base of
water as the major solvent serving as a
vehicle carrying the solid components
Water (binders, pigments and additives).
based • Distemper: Distemper is a water based
paint in which the binding medium
paint :
consists essentially of either glue or
casein, or similar sizing material. The
major constituents of distemper are
chalk, lime, water and some coloring
agents if necessary. They are also
known as cement paint.
• Oil paint is a type of slow-drying paint that
consists of particles of pigment suspended
in a drying oil, commonly linseed oil. The
Oil
viscosity of the paint may be modified by
the addition of a solvent such as turpentine
based
or white spirit, and varnish may be added to
increase the glossiness of the dried oil paint
film.
paint
• A wide range of hydrocarbon solvents are
used for paint formulation: Aliphatic
compounds (eg. White spirit) Aromatic
compounds(eg. Toluene, Xylene) Ketones
(eg. methyl ethyl keton) Esters Alcohols
Glycol ethers. Glycol ether esters.
Emulsion paints :
01 02 03
Any paint consisting of an emulsion Emulsion paint is water based with Modern Emulsions are water-based,
of oil in water solvent is known as some additives to make it more with vinyl or acrylic resins added to
emulsion paint durable, but it can usually be make them more hard-wearing than
scrubbed off with water and traditional emulsions. This results in
detergent. varying degrees of sheen in the
finish; as the shine increases, the
paint tends to be more hard wearing.
The ranges usually offer matt,
eggshell, silk, satin and full ...
Enamel paint is paint that air dries to a hard, usually glossy, finish, used for coating
surfaces that are outdoors or otherwise subject to hard wear or variations in
temperature; it should not be confused with decorated objects in "painted enamel“
Enamel Water based enamel : Water based enamel contain acrylic resin as binder. They
paint contain inflammable solvents ,lower ordour
Oil based enamel : Oil based enamel contain Oil or Turps based Alkyds as binder.
Contains flammable solvents Strong odour due to solvent fumes
Benefits Better aesthetics
of
Objectively increased home value
Painting
Better curb appeal
Home’s
Increased protection against the elements
Exterior
Proactive identification of insect damage
Increased lifespan of siding
Practical costs
Paints used in nepal
The four ma- jor paint manufacturing industries selling
enamel paint in Nepal are:
• Asian Paints
• Berger Paints
• Pashupati Paints and
• Kansai Nepal paints (previously marketed
as Nepal Shalimar Paints).
Properties of an ideal paint
forming a continuous
high opacity quick drying corrosion resistance
protective film
colour stability (i.e.
abrasion and scratch
water resistance heat resistance against visible and
resistance
ultraviolet radiation)
durability flexibility easily cleaned
