THE 3 rd INTERNATIONAL SCIENTIFIC CONFERENCES OF STUDENTS AND YOUNG RESEARCHERS dedicated to the 99
th
anniversary of the National Leader of Azerbaijan Heydar Aliyev
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Waterborne Polyurethane Coatings Considering the environmental issues related with poisonous air
contaminants and volatile organic chemicals (VOCs), waterborne
polyurethane dispersions (WPUDs) becoming more prominent as coating
materials. The name “waterborne” (WB) is used for coating systems which
utilize water as solvent. Sometimes different solvents can also be applied
alongside water such as glycol ethers, but water content should be upto 80
%. WBs can be further classified into water-dispersible/colloidal (dispersions),
water-soluble/water-reducible (solutions) and emulsions (latex) paints (Y. Lu,
2008). Depending on the resin choice, performances and physical properties
of previously mentioned type of WB can vary. Core advantages of vegetable
oil-based WB coatings are non-polluting, quick drying, easy to handle nature,
cheap price, and environmentally friendly aspects (Gündüz, 2002).
High Solids Polyurethane coatings High solids PU coatings have also gained considerable attention again
for mainly environmental issues. Nowadays, high solids PU coatings mainly
used for marine coating and protective coating purposes. Usually, these
coatings tend to have greater content of solids, about 70-80 % solids in paints
(E. Sharmin, 2015). Additionally, they are known to have less volatile organic
chemicals (VOCs) compared to conventional solvent-based PU coatings.
What is more, they also outdo their traditional counterparts with the same
characteristics such as durability
References 1. Chaudhari, V. G. (2013). Development of Eco-friendly PU Coatings Based on Neem Oil.
2. Datta, J. &. (2017). Synthesis, structure and properties of poly(ester-urethane)s obtained
using bio-based and petrochemical 1,3-propanediol and 1,4-butanediol.
3. E. Sharmin, F. Z. (2015). Recent advances in vegetable oils based environment friendly
coatings. Ind. Crops Prod. 76, 215-229. [Gündüz, 2002]
4. Sharmin, E. &. (2012). Polyurethane: An Introduction. London: InTech.
5. Y. Lu, R. L. (2008). SOWP dispersions:effects of polyol functionality and hard segment
content on properties,. Biomacromolecules 9, 3332–3340