Chemical Engineering August 2020 - 31

Solid line: Blue basecoat
Pattern line: Red basecoat
VOC emisssion
Raw material contribution
Current
formulation
Formula 2
~ 20%
reduction
VOC
Formula 3
~ 55%
reduction
VOC
Smog
FIGURE 4. This lifecycle assessment compares
three waterborne basecoats, looking at the
environmental impact of varying levels of
VOC content
plying the paint or coating.
For example, the raw materials
that comprise a waterborne paint
are very different from their traditional
solvent-borne counterparts.
This is largely due to the modification
requirements and balancing
material properties to meet
specifications. With the increase
in the preference for sustainable
products, more waterborne rawmaterials
suppliers have emerged
globally. However, until their supply
level matches or exceeds those for
traditional solvent-borne systems,
suppliers will be forced to work
with limited supply and extended
lead times. Current suppliers are
contributing to researching and
developing raw materials for waterborne
products, which leads to
the higher price when compared
with solvent-borne paint. Additionally,
if a raw material is not registered
in the country where it will be
manufactured or used, the paint
supplier must work with the purchaser
to ensure that all raw materials
are properly identified and
registered. These factors considered,
technological advancements
with waterborne coatings are
necessary for purchasers to consider
and adopt to remain compliant
with industry regulations and
stay competitive.
Different chemistries and varying
line equipment require training and
safety precautions tailored to the
specific coating technology and
equipment being used. In order to
provide training and recommendations
for lines, it is essential to
have a technical understanding of
the equipment, its limitations, and
how to handle it. The most effective
way to accomplish this is to
have a dedicated application facility
to replicate the manufacturing
lines of coatings end users. For
example, to identify the appropriate
equipment for each program,
a mock trial line is set up. Once
the coating-spray process and
parameters are identified, a user
line survey should be performed
to evaluate compatibility and make
improvement recommendations.
In line with the principle of providing
more convenience for users,
a team should be established to
evaluate paints and coatings in advance
to increase recognition and
trust from users.
Finally, suppliers must consider
the different storage requirements
associated with waterborne systems.
Since waterborne paints
are more susceptible to temperature
and humidity fluctuations,
they must be stored and shipped
in containers that will not exceed
the liquid temperature limits for
water. While shipping and storing
require important considerations,
so does the disposal of waste.
Temperatures beyond the required
limits can cause severe quality issues,
which can lead to unsalvageable
inventory and capacity waste.
This requires the use of insulated
or cooled containers. All of these
upgrades and development processes
contribute to capital investments
for both the supplier and the
applicators. However, by realizing
and addressing these areas early
on in the transition, all of the parties
in the supply chain can align for
seamless conversion into the coating
market's sustainable future.
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AUGUST 2020
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Normalization to highest impact
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Chemical Engineering August 2020

Table of Contents for the Digital Edition of Chemical Engineering August 2020
