2. What is paint?
Paint is a chemical substance used on
surfaces for decorative and protective
purposes.
It leaves a thin film on the surfaces.
3. Types of paints
On the basis of connectors
1. Termoplastic
2. Termoset
On the basis of sectors
1. Textile
2. Coatings
3. Leather
4. Marine
5. Plastic add.
4. On the basis of application
1. Spraying
2. Dipping
3. Rollers
4. Brushes
On the basis of drying
1. Air drying
2. Oksidation
3. Solvent evaporation
5. Connectors: are in the form of polimers that
they occur the paint film after drying
1. Alkid connectors
Alkids are usually the products of poli
alcohols and poli asids.
The important difference of alkids from
other polyesters is the incurrance of
monoasids. These monoasids are usually oil
asids.
6. n(R-COOH) + n(R-OH) R-C-OR + H2 O
O
The carboxil group of organic asid and
hydroxil group of alcohol.
The outcome is ester and H2 O
7. Raw material used for the production of
alkids
Poliasids
Monoasids
Polialcohol
Solvents
Catalists
8. Alcids may be classified on the
basis of oil lengths
1. %20-45 oil ingridents, short oiled
alkid (auto and synthetic paints)
2. %45-60 oil ingridents, medium
oiled alkid (constructing and auto
synthetic paints)
3. %60-80 oil ingridents, long oiled
alkids (constructing and synthetic
paints)
Performance
decrease,
application
becomes
more easier
9. PVA Connectors
It occurs with the polimerisation of Vinil
Asetat Monemer (generally used in
plastic wall paints and glue).
This reaction is a exothermic reaction, so
it has to be controlled with the cooling
reactors.
n(CH2 = CH) (CH2-CH)n
CH3 CH3
10. Drying type Connector type Product
Solvent vaporization Seluluzik resins
Silicon resins
PVA, akrilik
Auto paints, transoprene
marine paints, paints
resistant to high heat
Oxidation Alkid and modified
alkid
Ferrolin, alimunium and
marine paints
With reactions Epoksi poliamin, epoksi
poliamid, akrilik
Yacht and furniture
paints
Furnace dried Alkid amino, termoset
akriliks, epoksi aminos,
fenolik resins
Industry paints
11. Solvent vaporization:The solvents of the
film vaporates and the molecules of
connectors occur a connection between
them.
Oxidation: While the solvents vaporates,
molecules of connectors occur a oxygen
bridges that form the firm hard.
12. Pigments: Organic and inorganic
substances. Colour, covering and
antikorazif features are supplied by
pigments.
Pigments do not solve in any kind of
solvents and they have a dimension less
than 1 micron.
13. Physical Features of Pigments
Colour
Coverity
Resistant to light
Absorbing oil (it has to be high)
Solve in water and alcohol
Dispersion
17. Filling Pigments: It give a specific
thickness to the paint.
Talk 3MgO.4SiO2.H2O
Barit BaSo4
Kalsit CaCo3
Kaolen SiO2.AlO3
Dolamit CaCo3.MgCo3
18. Solvents: Solvents usually is added in two
phases.
In the first phase, paint, less liquid or solid,
become liqiuified.
In the second phase paint become applicable
with rollers or brushes.
In this sense, tiner is added to the synthetic
paints and water is added to the plastic
paints
19. Grouped into three
1. Real solvents (ester and ketons)
2. Secret solvents (Alcohol)
3. Seyreltici solvents (aromatic hydocarbon)
If these solvents are not distirbuted fairly,:
Blister
Bad sticking
Milking
Oranging
20. Raw material Liquified raw material
Solid Additives First mixture
Colour tank making colour last tests
Controlling Filling
21. A good paint includes:
1. Recoverability: Paint recover the surface applied.
It is wanted to recover the surface with two
applications
2. Easily applicable:
3. Resistant to physical effects
4. Resistant to chemical effects (saop, cola, oil)
5. It should be resistant to athmosferic and special
situations like rain, sun
6. It should be decorative
22. Which wheather condition is suitable for
painting?
Synthetic paints: It is not recommended to
paint less than +5°c.
At the +15 °c, the drying duration
decrease by third times.
Less than +0 °c, drying duration increases
8-10 days.
23. Plastic paints (PVA, akrilik paints): It is not
recommended to be painted under +5 °c.
Because the connectors of paints lose their film
structure and become dry. So they can be affected
by rain.
Exterior paints: Exterior parts should be painted
under +20 +30 °c and can dry within 6-8 hours
+10°c : can be affected within 24 hours
+5°c: within 36 hours
24. The important aspects of painting
Wheather conditions
Shaking the paint
Close the cap of paint when not used
Do not apply on the oiled or swelled
surfaces
Apply two layer paint instead of one
layer paint
