Chemistry Reference
In-Depth Information
Paint stripper
Paint pretreatment
Polyester paint
Polyurethane coating
Metallizing
Marine paint and corrosion
Paint removal
Paint consists of essentially the following components:
Pigment—metallic
Binder
Dispersants (emulsifiers, etc.)
Solvent
Additives
These mixtures are very complex systems, and much of the industrial development
in these areas is safeguarded by patents.
9.5.3 f
o o d
e
m u l S I of in S
(m
I l K
I
n d u S T r y
)
Surface and colloids have been found to play a big role in the processes of natural
systems such as food emulsions. One of the most important functions in the life of
mammals on earth is the feeding of newborns. In this context,
milk
is one of the most
amazing examples of emulsions as found in nature, especially when its role in the
growth and nutrition of newborns is considered. Milk consists of fats, nonfats (such
as lactose), and inorganic salts. The milk emulsion has to be stable to a certain extent,
and it has to provide nutrition based on the many different molecules present in the
emulsion (water, fats, proteins, inorganic salts, and organic molecules). Nature uses
emulsion since it needs to provide fats and proteins as in this form newborns need for
their nutrition and other needs, as well as to provide water and inorganic salts. This a
very remarkable feat that nature performs, by which newborns can sustain life from
birth. However, in some cases, when the newborn may need extra nutrition, it has to
be met by synthetic milk, a food emulsion created by the milk industry.
Another example of a food emulsion is the ice cream, in which the colloidal dis-
persion of ice particles is achieved together with tiny entrapped air bubbles in an
emulsion consisting of fats, sugar, and thickening agents (polysaccharides).
composition of milk and Ice cream
Ice cream
milk
Fats
13
4
Nonfats
10
8
Sugar
16
—
Emulsifier
0.4
—
Stabilizer
1
—
Inorganic salts
1
1
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