INVESTIGATION OF THE PRODUCTION TECHNOLOGY OF ENVIRONMENTALLY SAFE URETHANE OLIGOMERS BASED ON LOCAL RAW MATERIALS

Authors

• Bakhtiyor Kudratovich Shaykulov, LLC “Tashkent Research Institute of Chemical Technology”, Tashkent, Republic of Uzbekistan;Follow
• Dilafruza Ruziboevna Akbarova Gulboeva, Karshi State University, Karshi, Republic of UzbekistanFollow
• Fayzulla Nurmuminovich Nurqulov, LLC “Tashkent Research Institute of Chemical Technology”Follow

Abstract

This paper investigates the step-by-step poly condensation pathway for synthesizing environmentally friendly, non-isocyanate urethane oligomers derived from local and safe raw materials: urea and ethylene glycol. The influence of thermodynamic parameters on the target product yield was systematically evaluated to determine the optimum technological matrix. Specifically, a 1:2 reactant mass ratio, a stable stationary temperature of 150-155 °C, and a reaction duration of 2 hours under an inert nitrogen atmosphere resulted in a sustainable and reproducible yield of 72%. Thermal degradation and competitive side-product condensations were activated above 160 °C, leading to a sharp drop in overall chemical efficiency. The functional group configurations and chemical architecture of the synthesized oligomer were fully confirmed via IR spectroscopy, demonstrating the successful formation of characteristic -C=N-, -C-N-, and -C-O-C- networks. Gel permeation chromatography (GPC) profiling verified that the weight-average molecular weight of the isolated system rests at 0.5 kDa. This low-molecular-weight profile minimizes hydrodynamic viscosity, ensuring exceptional homogeneity during subsequent structural blending with acrylic monomers, thereby serving as a highly reactive matrix for high-performance hybrid acrylic-urethane coatings.

First Page

5

Last Page

10

References

1. Shaykulov, B. K., Nurkulov, F. N., & Djalilov, A. T. (2022). Research on the physicochemical properties of organic monomer-based copolymers that stored acrylic and nitrogen. Journal of Compositional Materials, (2), 21-23.

2. Figovsky, O., & Shapovalov, L. (2011). Non-isocyanate polyurethanes: An overview of progress in the field. Scientific Israel-Technological Advantages, 13(4), 115-122.
3. Kathalewar, M. S., Joshi, P. B., Sabnis, A. S., & Malshe, V. C. (2013). Non-isocyanate polyurethanes: From chemistry to applications. RSC Advances, 3(13), 4110-4129.
4. Rokicki, G., Parzuchowski, P. G., & Mazurek, M. (2015). Non-isocyanate polyurethanes: Synthesis, properties, and applications. Polimery, 60(5), 289-299.
5. Gomez-Lopez, A., Elizalde, F., & Sardon, H. (2021). Isocyanate-free synthesis of polyurethanes via polycondensation routes. Green Chemistry, 23(18), 6745-6762.
6. Aliyeva, M. T., Kholturaeva, N. R., & Ikhtiyarova, G. A. (2022). Acquiring compositions based on local raw materials for textile industrial wastewater treatment. Austrian Journal of Technical and Natural Sciences, (9-10), 36-40.
7. Blain, M., Cornille, A., Boutevin, B., & Caillol, S. (2020). Isocyanate-free polyurethanes: From substitute to high performance materials. Progress in Polymer Science, 111, 101308. https://doi.org/10.1016/j.progpolymsci.2020.101308
8. Gomez-Lopez, A., Elizalde, F., & Sardon, H. (2021). Isocyanate-free synthesis of polyurethanes via polycondensation routes: A green perspective. Green Chemistry, 23(18), 6745-6762. https://doi.org/10.1039/D1GC02102G
9. Verma, D., Sabnis, A. S., & Malshe, V. C. (2022). Synthesis and characterization of acrylate-urethane hybrid emulsion for coating applications. Journal of Polymer Research, 29(5), 184. https://doi.org/10.1007/s10965-022-03014-x
10. Wang, X., Li, Y., & Zhang, J. (2023). Preparation and properties of waterborne acrylic-urethane hybrid co-polymers for industrial coatings. Progress in Organic Coatings, 174, 107312. https://doi.org/10.1016/j.porgcoat.2022.107312
11. Sahu, S. S., & Gite, V. V. (2023). Polyurethane oligomers from sustainable resources: Structural elucidation using advanced FTIR and NMR spectroscopy. Polymer Bulletin, 80(3), 2911-2928. https://doi.org/10.1007/s00289-022-04205-1
12. More, A. S., & Gadhave, R. V. (2024). Gel permeation chromatography (GPC) profiling and molecular weight distribution of non-isocyanate urethane architectures. Journal of Applied Polymer Science, 141(11), e55124. https://doi.org/10.1002/app.55124
13. Panda, S. K., & Rout, T. K. (2025). Anti-corrosive performance and mechanical endurance of hybrid acrylic-urethane macromolecular networks. Surface and Coatings Technology, 492, 131102. https://doi.org/10.1016/j.surfcoat.2024.131102
14. Zhang, L., Liu, H., & Zhou, W. (2026). High-temperature thermal degradation and side-reactions during urea-diol polycondensation pathways. Thermochimica Acta, 743, 179812. https://doi.org/10.1016/j.tca.2025.179812
15. Kantagev, B. A., & Sharipov, M. S. (2023). Utilization of local industrial byproducts for synthesizing ecological oligomer derivatives. Chemical Technology of Organic Substances, 14(1), 45.
16. Rakhimov, A. Z., & Tursunov, K. K. (2024). Ecological safety aspects and synthesis parameters of non-isocyanate oligomeric structures. Eurasian Journal of Chemistry and Physics, 19(3), 112-119.

Recommended Citation

Shaykulov, Bakhtiyor Kudratovich; Akbarova, Dilafruza Ruziboevna Gulboeva; and Nurqulov, Fayzulla Nurmuminovich (2026) "INVESTIGATION OF THE PRODUCTION TECHNOLOGY OF ENVIRONMENTALLY SAFE URETHANE OLIGOMERS BASED ON LOCAL RAW MATERIALS," Technical science and innovation: Vol. 2026: Iss. 3, Article 1.
Available at: https://btstu.researchcommons.org/journal/vol2026/iss3/1