İstinadlar:
[1] Q.Ş. Məmmədov, M.Y. Xəlilov, “ Ekologiya və ətraf mühit,” Bakı, 2004.
SOYBEAN OIL-BASED POLYURETHANE COATINGS
Najaf Aghamaliyev
Baku Higher Oil School
Baku, Azerbaijan
najaf.aghamaliyev.std@bhos.edu.az
Supervisor: Rima Guliyeva
Key Words:
Soybean, Polyurethanes, Sustainable Development
The agenda of today’s scientific world is “sustainable development”.
Polymeric coatings have a very important place in industry from an economical
point of view. Epoxy, alkyd, polyurethanes and polyetheramides are excessively
used for coating purposes (A. Chaudhari, 2013). The ongoing strategy on
green coatings is to utilize renewable resources, find eco-friendly ways of
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production and improving their material degradation to be able to apply them
for a long time. The coating industry has already started the concept of
environment friendly technologies. These are high solids, water borne,
hyperbranched, UV curable, no solvent coatings which use monomers/
polymers obtained through renewable resources. Vegetables oils are one of
the most abundant, biodegradable, non-toxic and cost-effective resource of
the nature provided to humans.
In this paper, particular vegetable oil, soybean oil was focused on.
Soybean oil has several advantages such as high saturation number than
other vegetable oil. It is also one of the most abundant sources of vegetable
oils. Three main soy-based polyurethane coating types are provided.
Non-isocyanate Polyurethane (NIPU) Coatings
In industry, polyurethanes are produced mainly from two methods: one-
step and two-step prepolymer methods (Datta, 2017). Both methods require
polyaddition of aromatic or aliphatic diisocyanates and oligomeric diols with
chain extender (usually low molecular weight diols), catalysts or other
additives (Sharmin, 2012). Polyols react diisocyanates forming prepolymers
that are terminated with isocyanate groups. Then chain extenders are used
to produce polyurethanes. Traditional polyurethane production has some
hazardous properties, especially isocyanate monomers that which are used
for getting prepolymer. Diisocyanates are obtained via treatment of primary
amines with phosgene, resulting in hydrogen chloride production. Phosgene
is a highly toxic and lethal gas, and it is produced from the reaction of chlorine
and carbon monoxide (Gao, 2009). Considering drawbacks of conventional
production, soybean oil based nonisocyanate PU coatings were implemented.
B. Tamami and his coworkers managed to produce nonisocyanate
polyurethane networks (NIPUs) from the reaction between di- or tri-primary
amines and CSBO. An exemplary reaction was shown with n-butylamine
which resulted in effective ring opening of cyclic carbonate as shown below:
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