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Journal articles on the topic 'Urea-formaldehyde oligomer'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Astakhova, Olena, Mykhailo Bratychak Jr., and Ananiy Kohut. "Initiating and Cross-Linking Properties of Urea-Formaldehyde Oligomers with Peroxide Groups." Chemistry & Chemical Technology 16, no. 3 (2022): 411–17. http://dx.doi.org/10.23939/chcht16.03.411.

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The initiating properties of urea-formaldehyde oligomers with peroxide groups have been studied. For comparison, the initiating activity has been examined for the polymerization of styrene by the peroxide oligomer based on the epoxy oligomer Epidian-5 and tert-butyl hydroperoxide. The cross-linking properties of the urea-formaldehyde oligomers with peroxide groups have been investigated using unsaturated oligoesters as a model. The chemistry of the formation of the substances with a cross-linked structure has been studied using IR spectroscopy.

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2

Inagamov, Sabitjan Yakubzhanovich, Feruza Azadovna Pulatova, and Gafur Israilovich Mukhamedov. "UREA FORMALDEHYDE OLIGOMERS – INHIBITORS OF POLYSACCHARIDE DESTRUCTION OF SODIUM CARBOXYMETHYL CELLULOSE, PRODUCED FROM WOOD PULP." chemistry of plant raw material, no. 1 (March 21, 2025): 95–105. https://doi.org/10.14258/jcprm.20250113181.

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The objective of this work is to study the kinetics of changes in the structure and properties of interpolymer complexes obtained on the basis of sodium carboxymethylcellulose polysaccharide (Na-CMC) with urea-formaldehyde oligomers (UFO). The stability period of solutions of Na-CMC interpolymer complexes with UFO determination of viscosity at various temperatures has been studied. Experimental data show that when storing aqueous solutions of Na-CMC, the viscosity decreases due to changes in the structure due to the rupture of polyester bonds, which leads to a decrease in the molecular weight

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3

Abdullayeva, I.G., and B.I. Jamalli. "PRODUCTION OF ANTI-CORROSION COATING COMPOSITIONS ON THE BASIS OF MODIFIED UREA-FORMALDEHID OLGYMERS. STUDY OF ADHESIS ABILITY OF COVER COMPOSITIONS ON THE BASIS OF MODIFIED UREA-FORMALDEHID OLIGOMERS." Annali d'Italia 32 (June 22, 2022): 45–47. https://doi.org/10.5281/zenodo.6684140.

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Urea-formaldehyde oligomer was modified with phenolomonomaleinamide in different proportions (1, 2, 3%) to form coating compositions. The adhesion and physical-mechanical properties of the prepared compositions at different temperatures were studied and compared with the properties of the composition based on the unmodified oligomer.

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4

Ramazanov, Bakhrom, Laylo Juraeva, and Nasiba Sharipova. "Synthesis of modified amino-aldehyde oligo (poly) mers and study of their thermal stability." IOP Conference Series: Earth and Environmental Science 839, no. 4 (2021): 042096. http://dx.doi.org/10.1088/1755-1315/839/4/042096.

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Abstract In the article are discussed the relevance of obtaining amino aldehyde oligomers and the study of their basic physicochemical properties and determines that the synthesis conditions and the ratio of the starting components play an important role on the properties and structure of the synthesized amino aldehyde oligomers. Using the Differential thermal analysis (DTA) method, it was proved that the modification of the urea-formaldehyde oligomer with acrylic acid helps to increase the thermal oxidative degradation of the resulting products. In this case, the modifier - acrylic acid stron

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5

Вьюнков, С. Н., and В. В. Васильев. "Study of a component of the urea-formaldehyde resin, is insoluble in water." Известия СПбЛТА, no. 233 (December 29, 2020): 199–207. http://dx.doi.org/10.21266/2079-4304.2020.233.199-207.

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Разработана методика химического анализа компонента карбамидоформальдегидной смолы (КФС), нерастворимого в воде. Синтезировали смолу при мольном соотношении исходных компонентов карбамид : формальдегид = 1 : 2, температуре 90 °С, начальной рН = 7,0…8,0, рН на кислой стадии 4,0…4,3. Для выделения водонерастворимого компонента КФС смешивали с большим количеством воды. Осадок промывали водой и растворяли в растворе йодида калия концентрацией 40%. В полученном растворе проводили окисление гидроксиметильных групп и свободного формальдегида йодом в щелочной среде. Избыток йода оттитровывали растворо

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Вьюнков, С. Н., and В. В. Васильев. "Study of a component of the urea-formaldehyde resin, is insoluble in water." Известия СПбЛТА, no. 233 (December 29, 2020): 199–207. http://dx.doi.org/10.21266/2079-4304.2020.233.199-207.

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Разработана методика химического анализа компонента карбамидоформальдегидной смолы (КФС), нерастворимого в воде. Синтезировали смолу при мольном соотношении исходных компонентов карбамид : формальдегид = 1 : 2, температуре 90 °С, начальной рН = 7,0…8,0, рН на кислой стадии 4,0…4,3. Для выделения водонерастворимого компонента КФС смешивали с большим количеством воды. Осадок промывали водой и растворяли в растворе йодида калия концентрацией 40%. В полученном растворе проводили окисление гидроксиметильных групп и свободного формальдегида йодом в щелочной среде. Избыток йода оттитровывали растворо

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7

Shirinov, T. T., and T. M. Naibova. "MODIFICATION OF A POLYETHYLENE AND POLYPROPYLENE BLEND WITH UREA-FUNCTIONALIZED PHENOL-FORMALDEHYDE CO-OLIGOMER." Chemical Problems 23, no. 3 (2025): 388–94. https://doi.org/10.32737/2221-8688-2025-3-388-394.

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This research presents a novel approach to addressing the challenges in recycling polyethylene and polypropylene (PE/PP) waste. Since PE and PP-based waste generally originates from the same household and industrial sources, they are often encountered as a mixture. Due to their differing physicochemical properties, separating these polymers becomes necessary prior to recycling. However, the separation and sorting of waste is a complex process, which limits the implementation of recycling. This study offers a more efficient recycling method that enables the processing of waste together without

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8

Chornaya, N. V., S. V. Karpova, O. A. Misyurov, and N. I. Bogdanovich. "Application of Urea-Formaldehyde Oligomer for Quality Improvment of Paper and Cardboard Products." Lesnoy Zhurnal (Forestry Journal), no. 6 (December 10, 2020): 182–93. http://dx.doi.org/10.37482/0536-1036-2020-6-182-193.

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The applicability of the developed binary system of synthetic compounds in coating paste, consisting of urea-formaldehyde oligomer (2 pts. wt. to the coating paste weight) and latex (16 pts. wt.), is found. It replaces the generally used complex of natural compounds, such as modified starch (3 pts. wt.), Na-CMC (2 pts. wt.), and casein glue (1 pts. wt.), in the presence of latex (16–32 pts. wt.). The properties of the coating paste samples met the standards, as evidenced by the viscosity according to the viscometer VZ-4 (13–17 s), the content of dry substances (50–54 %) and pH (9.0–10.5). The

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Вьюнков, С. Н., and В. В. Васильев. "Modification of the hardener of urea formaldehyde resins with a low molar ratio of formaldehyde to urea." Известия СПбЛТА, no. 243 (June 8, 2023): 284–96. http://dx.doi.org/10.21266/2079-4304.2023.243.284-296.

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Для снижения токсичности древесностружечных плит применяют карбамидоформальдегидные смолы с низким мольным соотношением формальдегида и карбамида - 1,0 и менее. Плиты на основе этих смол имеют пониженную прочность и водостойкость и увеличенное время прессования. Указанные недостатки объясняются особенностями новых смол. В молекулах олигомера формальдегид соединятся с карбамидом преимущественно метиленовыми связями и содержится малое количество гидроксиметильных групп, необходимых для отверждения смолы. Так как в смоле мало свободного формальдегида, - 0,05…0,10%, отвердитель вынужден вступать в

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10

Leonovich, A. A., A. V. Sheloumov, and V. G. Shpakovskii. "The study of hardening of urea-formaldehyde oligomer containing multyfunctional hardener." Russian Journal of Applied Chemistry 83, no. 3 (2010): 539–44. http://dx.doi.org/10.1134/s1070427210030316.

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11

Kushnir, L. V., M. N. Bratychak, V. A. Bychkov, and V. A. Puchin. "Study of structurization of peroxide urea-formaldehyde oligomer by IR spectroscopy." Journal of Applied Spectroscopy 44, no. 1 (1986): 77–80. http://dx.doi.org/10.1007/bf00658326.

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12

Иванов (Ivanov), Даниил (Daniil) Валерьевич (Valer'evich), Адольф (Adol'f) Ануфриевич (Anufrievich) Леонович (Leonovich), and Антон (Anton) Станиславович (Stanislavovich) Мазур (Mazur). "THE STUDY OF GUANIL UREA SULFATE AS A MODIFIER OF FIBREBOARD." chemistry of plant raw material, no. 1 (March 6, 2019): 277–85. http://dx.doi.org/10.14258/jcprm.2019014181.

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Fiberboards are producing of vegetable raw materials and urea-formaldehyde glues. The necessity to bind formaldehyde led to the search for modifiers that are capable to reduce the toxicity of wood boards without impairment of their physico-mechanical properties. It was researched how guanylurea sulfate influences on some process, which are occur during the formation of wood boards. The salts were synthesized at molar ratios of cyanoguanidine : sulfuric acid from 1 : 0.1 to 1 : 0.5 and their effects on the technological parameters of the glue were investigated. It was found that in combination

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13

Shamaev, Vladimir A., Olga R. Dornyak, Ilya N. Medvedev, Alexander V. Russu, and Oxana S. Garkusha. "Stabilization of shapes and dimensions of compressed wood using chemical and physical methods." E3S Web of Conferences 390 (2023): 05044. http://dx.doi.org/10.1051/e3sconf/202339005044.

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Descriptions of methods and results of experiments on the preservation of geometry and dimensional parameters of compressed wood using chemical and physical methods are given. Wide ranges of substances were used as chemical stabilizers in urea aqueous solution (plasticizer during pressing). Wood treatment with ultrasound, liquid nitrogen and pulsed magnetic field was used as physical methods. Urotropine, urea-formaldehyde oligomer, phenol-formaldehyde resin, butyric anhydride and physical methods (liquid nitrogen and pulsed magnetic field), as well as ultrasound can be applied to increase form

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14

S.A.Mamatkarimov, T.J.Kodirov, and A.Yu.Toshev. "INFRA-RED SPECTROSCOPIC INTERPRETATION OF MODIFIED HIDE GLUE." Multidisciplinary Journal of Science and Technology 5, no. 4 (2025): 1179–86. https://doi.org/10.5281/zenodo.15327955.

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This study presents the results of infrared (IR) spectroscopy analysis of modified hide glue obtained by incorporating urea-formaldehyde resin into its composition. A comparative analysis of the IR spectra of unmodified and modified glue was carried out, revealing characteristic changes in absorption bands that indicate the formation of hydrogen and ion-dipole bonds between the collagen of the hide glue and the functional groups of the modifier. The studies showed that the modification improves the structural and physicochemical properties of the glue, as evidenced by shifts and changes in the

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15

Wang, Wenbo, Zongyan Zhao, Zhenhua Gao, and Mingruo Guo. "Whey protein-based water-resistant and environmentally safe adhesives for plywood." BioResources 6, no. 3 (2011): 3339–51. http://dx.doi.org/10.15376/biores.6.3.3339-3351.

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Whey protein is a renewable and environmentally safe biomaterial, a by-product of cheese production. It can be utilized for non-food applications for value-added products. The substances glyoxal (GO), glutaraldehyde (GA), polymeric methylene biphenyl diisocyanate (p-MDI), urea-formaldehyde (UF) resin, and phenol-formaldehyde oligomer (PFO) that contain reactive groups were applied together with whey protein as modifier in order to increase crosslinking density and molecular weight for improving the bond strength and water resistance of whey protein. A water-resistant and environmentally safe w

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16

Fedotov, A., Tat'yana Vahnina, Andrey Titunin, and Aleksandr Sviridov. "STUDY OF THE INFLUENCE OF STABILIZERS ON THE PROPERTIES OF CARBAMIDE FOR-MALDEHYDE BINDER AND FC PLYWOOD." Forestry Engineering Journal 10, no. 1 (2020): 136–43. http://dx.doi.org/10.34220/issn.2222-7962/2020.1/14.

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The problem of stabilizing the properties of the urea-formaldehyde binder during storage is relevant for both glued products and resins. Changing the performance of the resin during storage makes it difficult to apply a binder and leads to a deterioration in the physical and mechanical properties of plywood. The effect of glycerol, mono- and triethanolamine, as well as a mixture of glycerol and monoethanolamine on the nominal viscosity of the resin after 56 days of storage, has been studied. The use of glycerol and monoethanolamine (including in the complex) reduces the nominal viscosity of th

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17

Kozhevnikov, D. A., and S. A. Ugryumov. "Assessment of adhesion of adhesive compositions based on urea-formaldehyde oligomer modified with alcohols in relation to production of wood-based panels." Polymer Science Series D 5, no. 3 (2012): 180–84. http://dx.doi.org/10.1134/s1995421212030136.

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18

Yang, Hui, Charles Q. Yang, and Qingliang He. "The bonding of a hydroxy-functional organophosphorus oligomer to nylon fabric using the formaldehyde derivatives of urea and melamine as the bonding agents." Polymer Degradation and Stability 94, no. 6 (2009): 1023–31. http://dx.doi.org/10.1016/j.polymdegradstab.2009.02.008.

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19

Astakhova, Olena, Olena Shyshchak, and Michael Bratychak. "Synthesis and Structure of Urea-Formaldehyde Oligomers with Peroxide Groups." Chemistry & Chemical Technology 15, no. 3 (2021): 369–76. http://dx.doi.org/10.23939/chcht15.03.369.

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The possibility of synthesis in the presence of tert-butyl peroxymethanol (TBPM) or tert-butyl hydroperoxide (TBHP) of urea-formaldehyde oligomers with peroxide groups (UFOP) has been considered. Zinc oxide was used as the reaction catalyst. The effect of the initial components ratio, the reaction temperature and the process time on the characteristics and yield of the obtained oligomers was studied. Methods for obtaining UFOP using a mixture of TBPM and TBHP as a component are proposed. The structure of the synthesized UFOP was confirmed by IR- and NMR-spectroscopic studies.

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20

Сhernaya, N. V., Zh S. Shashok, S. V. Karpova, E. P. Uss, and O. A. Misyurov. "Application of weak cationic polyelectrolytes in paper and cardboard efficiency improvment technology." Forestry Bulletin 26, no. 3 (2022): 105–14. http://dx.doi.org/10.18698/2542-1468-2022-3-105-114.

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The article considers the effect of weak cationic polyelectrolytes on the structure- and paper-forming properties of glued fibrous suspensions and the quality of glued and coated paper and cardboard samples obtained from them. It is shown for the first time that the efficiency of using cationic polyelectrolytes increases by 2…3 times due to a change in the sequence of its introduction into glued fibrous suspensions (cellulose and waste paper) in relation to rosin emulsion and electrolyte, as well as by «correction» their dosages. It is found that the use of the developed technology allows cati

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García-Valverde, María, Theodoros Chatzimitakos, Rafael Lucena, Soledad Cárdenas, and Constantine Stalikas. "Melamine Sponge Functionalized with Urea-Formaldehyde Co-Oligomers as a Sorbent for the Solid-Phase Extraction of Hydrophobic Analytes." Molecules 23, no. 10 (2018): 2595. http://dx.doi.org/10.3390/molecules23102595.

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A new procedure for the functionalization of melamine sponge (MeS) with urea-formaldehyde (UF) co-oligomers is put forward. The procedure differs from the typical synthesis of the UF co-polymer, as it employs a base-catalyzed condensation step at certain concentrations of urea and formaldehyde. The produced melamine-urea-formaldehyde (MUF) sponge cubes are hydrophobic, despite the presence of hydrophilic groups in the oligomers. The MUF sponge developed herein is used as a sorbent for the solid-phase extraction of 10 analytes, from 6 different classes (i.e., non-steroidal anti-inflammatory dru

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Bezbozhnaya, T. V., V. V. Zamashchikov, and A. I. Lutsyk. "Synthesis of urea-formaldehyde oligomers without a solvent." Russian Journal of Applied Chemistry 77, no. 9 (2004): 1544–46. http://dx.doi.org/10.1007/s11167-005-0069-6.

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23

Białkowska, Anita, Wojciech Kucharczyk, Iwona Zarzyka, Barbora Hanulikova, Milan Masař, and Mohamed Bakar. "Polylactide-Based Nonisocyanate Polyurethanes: Preparation, Properties Evaluation and Structure Analysis." Polymers 16, no. 2 (2024): 253. http://dx.doi.org/10.3390/polym16020253.

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This study investigated the successful synthesis and characterization of nonisocyanate polyurethanes (NIPUs) based on polylactide. The NIPUs were synthesized by a condensation reaction of oligomers with hard segments (HSs) and synthesized carbamate-modified polylactic acid containing flexible segments (FSs). The oligomers with HSs were prepared from phenolsulfonic acid (PSA) or a mixture of PSA and hydroxynaphthalenesulfonic acid (HNSA), urea and formaldehyde. The mixing of oligomeric compounds with different amounts of formaldehyde was carried out at room temperature. Obtained NIPU samples wi

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Rakhimov, F.F., S.I. Ibodova, Sh.Sh. Khamrakulov, and A.A. Khaidarov. "Synthesis of Organosilicon Polymers Based on Carbamide Formaldehyde Resin." RA JOURNAL OF APPLIED RESEARCH 08, no. 01 (2022): 18–20. https://doi.org/10.47191/rajar/v8i1.05.

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ABSTRACT: The article presents the synthesis of organosilicon compounds based on industrial secondary raw materials of urea-formaldehyde resin and tetraethoxysilane. The structural characteristics of the synthesized hydrophobic polymer have been studied. Compositions of hydrophobic compositions based on synthesized poly (oligomers) have been developed and tested in concrete mixtures.

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Astakhova, Olena, Olena Shyshchak, and Michael Bratychak. "Synthesis and Cross-Linking Properties of Melamine Formaldehyde Oligomers with Peroxy Groups." Chemistry & Chemical Technology 15, no. 4 (2021): 512–19. http://dx.doi.org/10.23939/chcht15.04.512.

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Melamine formaldehyde oligomers with peroxy groups (MFOP) have been synthesized based on melamine or urea and melamine in the presence of tert-butyl peroxymethanol or tert-butyl hydroperoxide. Zinc oxide was used as a catalyst. The effect of peroxide nature, ratio of the starting components and process time on the characteristics and yield of MFOP has been studied. The structure of the synthesized MFOP was confirmed by IR- and PMR-spectroscopy. The chemistry of the cross-linked structures formation was studied. The possibility of using such oligomers as a cross-linking agent for the mixtures b

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Perminova, Daria A., Victor S. Malkov, Irina Kurzina, Tatiana B. Babushkina, and Anton M. Nachkebiya. "Effect of Bicyclic Polyfunctional Modifier (BPM) on the Characteristics of Wood Composite Materials Based on Urea Formaldehyde Oligomers." Advanced Materials Research 880 (January 2014): 32–35. http://dx.doi.org/10.4028/www.scientific.net/amr.880.32.

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The paper represents the results of research related to the application of urea and glyoxal condensation product to modify the urea-formaldehyde resins (UF resins) aiming to obtain low-toxicity wood plates on the basis thereof. It was stated that the bicyclic polyfunctional compound is an effective modifier which not only does allow reducing the toxicity of wood-composite materials based on UF resins, but also increasing their physical-mechanical characteristics.

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Razin'kov, E. M., K. A. Korolyova, and Ya V. Beznosko. "Ways to solve the problem of reducing the toxicity of composite wood materials based on urea-, phenol-formaldehyde oligomers." Plasticheskie massy, no. 7-8 (September 17, 2020): 61–64. http://dx.doi.org/10.35164/0554-2901-2020-7-8-61-64.

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Composite wood materials in the form of chipboards based on urea-formaldehyde resins (grades KF-MT-15, KF-NFP, etc.) are widely used in furniture production. However, one of the main shortcomings of chipboards is their toxicity associated with the release of a gas harmful to humans – formaldehyde. Its maximum permissible concentration in the air of a residential building should not exceed 0,01 mg per m3 of air. The paper shows one of the solutions to the problem of reducing the toxicity of chipboards

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Inogamov, S. Ya, M. Yu Mukhamedzhanova, and G. I. Mukhamedov. "Rheological properties of polycomplex gels of carboxymethyl cellulose with urea-formaldehyde oligomers." Russian Journal of Applied Chemistry 81, no. 2 (2008): 310–15. http://dx.doi.org/10.1134/s1070427208020298.

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Kulichikhin, S. G., and V. B. Voit. "Effect of deformation on the rheokinetics of gelling of urea-formaldehyde oligomers." Mechanics of Composite Materials 29, no. 2 (1993): 171–74. http://dx.doi.org/10.1007/bf00696448.

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Papulova, G. N., and M. Yu Kvasnikov. "Water-Soluble Urea-Formaldehyde Oligomers in Paint for Single-Firing Decoration of Ceramic." Glass and Ceramics 77, no. 3-4 (2020): 116–18. http://dx.doi.org/10.1007/s10717-020-00252-1.

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Иванов, Д. В., П. К. Никифорова та М. Ю. Захаренкова. "Свойства карбамидоформальдегидных смол, синтезированных при разных мольных соотношениях карбамид: формальдегид". Известия СПбЛТА, № 251 (28 грудня 2024): 381–98. https://doi.org/10.21266/2079-4304.2024.251.381-398.

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Мольное соотношение карбамид : формальдегид является одним из основных параметров, определяющих рецептуру карбамидоформальдегидных смол. Во многом от мольного соотношения зависят строение основных компонентов смолы (карбамидоформальдегидных олигомеров, метилольных производных карбамида), свойства смол и материалов, изготовленных с их использованием. Цель работы – изучение строения компонентов карбамидоформальдегидных смол, изготовленных при разных мольных соотношениях карбамид : формальдегид; оценка влияния мольного соотношения на свойства смол и изготовленных с их использованием древесноструж

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Kim, Moon G., Sang-yeop Lee, and Badamkhand Sukhbaatar. "Syntheses of Diethylene Tricarbamide–Formaldehyde and Copolymer Resins and Their Low Formaldehyde-Emitting Binder Performance of Wood Composite Board." Forest Products Journal 68, no. 3 (2018): 236–55. http://dx.doi.org/10.13073/fpj-d-17-00074.

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Abstract Diethylene tricarbamide–formaldehyde (DF) resins were investigated for syntheses at low mole ratios and at about 60 percent resin solids levels in water as low formaldehyde-emitting binders of wood composite boards. Tri-functional monomer D was shown to react readily with formaldehyde to form hydroxymethyl groups that then react to form methylene bonds between molecules to form DF resins of water-soluble oligomeric condensation products, similar to urea-formaldehyde (UF) resins. DF resins showed a better storage life and longer pot life than, and similar cure times as, UF resins. DF r

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Razin'kov, E. M., and K. A. Korolyova. "The problem of using composite materials with urea-formaldehyde oligomeric binder in residential premises." Plasticheskie massy, no. 5-6 (July 11, 2020): 60–64. http://dx.doi.org/10.35164/0554-2901-2020-5-6-60-64.

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Zhang, Bengang, Xinyi Chen, Antonio Pizzi, et al. "Highly Branched Tannin-Tris(2-aminoethyl)amine-Urea Wood Adhesives." Polymers 15, no. 4 (2023): 890. http://dx.doi.org/10.3390/polym15040890.

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Condensed tannin copolymerized with hyperbranched tris(2-aminoethyl)amine-urea formed by amine-amido deamination yields a particleboard thermosetting adhesive without any aldehydes satisfying the requirements of relevant standards for the particleboard internal bond strength. The tannin–triamine–urea cures well at 180 °C, a relatively low temperature for today’s particleboard hot pressing. As aldehydes were not used, the formaldehyde emission was found to be zero, not even in traces due to the heating of wood. The effect is ascribed to the presence of many reactive sites, such as amide, amino,

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Inogamov, S. Ya, and G. I. Mukhamedov. "Membrane Properties of Interpolymer Complexes Based on Carboxymethyl Cellulose with Urea-Formaldehyde Oligomers of Varying Structure." International Polymer Science and Technology 31, no. 10 (2004): 54–57. http://dx.doi.org/10.1177/0307174x0403101011.

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Shamaev, Vladimir A., and Oleg F. Shishlov. "Hardening and Stabilization of Volumetric Properties in Aspen and Poplar Wood with Cardanol." Lesnoy Zhurnal (Forestry Journal), no. 2 (June 10, 2023): 155–61. http://dx.doi.org/10.37482/0536-1036-2023-3-155-161.

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Aspen and poplar are the least required types of wood in the Russian Federation, whose stock is continually expanding. Such wood can be used as a substitute for valuable hardwood, but in this case the strength must be almost doubled while achieving stability in shape and size. Treatment with acetic anhydride, polyvinyl alcohol, polyethylene glycol, or hydrothermal care are the most common methods for maintaining the volumetric stability of the wood. Treatment with phenol- and urea-formaldehyde monomers, oligomers, and resins is typically done for strength improvement. The stabilization of the

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G.S. Hasanov, T.M. Naibova, G. S. Hasanov, T. M. Naibova, and A. Y. Aliyeva A.Y. Aliyeva. "BIOCOATING ON OIL AND GAS PLATFORMS - PERIPHYTON AND THE SOOLIGOMER – BASED COMPOSITE USED AGAINST CORROSION." Azerbaijan Journal of Chemical News, June 1, 2023, 65–71. http://dx.doi.org/10.32010/ajcn04022023-65.

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Periphyton, which forms a biological cover by accumulating a large number of organisms, develops in large quantities in the underwater parts of ships and hydraulic structures, causing serious damage to facilities, especially maritime. Thus, periphyton organisms, which choose the submarine part of the ship as a substrate, cause the surface of the ship to be eroded and the speed of the ship to decrease by up to 50%. Therefore, the article investigates the use of varnish-based coatings based on urea-modified resorcinol formaldehyde soligomers to protect marine equipment and facilities from corros

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F.F., Rakhimov. "Synthesis of Organosilicon Polymers Based on Carbamide Formaldehyde Resin." RA JOURNAL OF APPLIED RESEARCH 08, no. 01 (2022). http://dx.doi.org/10.47191/rajar/v8i1.05.

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The article presents the synthesis of organosilicon compounds based on industrial secondary raw materials of urea-formaldehyde resin and tetraethoxysilane. The structural characteristics of the synthesized hydrophobic polymer have been studied. Compositions of hydrophobic compositions based on synthesized poly (oligomers) have been developed and tested in concrete mixtures.

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Ramazonov, Bakhrom, Feruzjon Aminov, and Sobir Gafurov. "SYNTHESIS AND IR SPECTROSCOPIC ANALYSIS OF UREA FORMALDEHYDE OLIGOMERS MODIFIED WITH ACRYLIC ACID." Universum:Technical sciences 132, no. 3 (2025). https://doi.org/10.32743/unitech.2025.132.3.19495.

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Ivanov, Daniil, Mariya Ekaterincheva, Aleksey Kalashnikov, Ksenya Baca, and Anton Mazur. "Usage of the New Modifier-curing Agent in Plywood Technology: The Influence to Urea-formaldehyde Resin Curing and Formaldehyde Emission." Periodica Polytechnica Chemical Engineering, June 8, 2023. http://dx.doi.org/10.3311/ppch.21369.

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One of the urgent scientific and technical objectives in the technologies of plywood and wood boards is the search for ways to reduce of hot pressing time without increasing the formaldehyde emission from finished products. To solve this problem was developed the new modifier-curing agent MC-4SF, is mainly a product of interaction of citric acid with urea and ammonia. Compared to traditional ammonium salts, the modifier-curing agent combines the properties of both direct and latent catalysts. Determination of the composition of residual methylol groups in the aqueous extracts obtained by treat

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