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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Lesnoy Vestnik / Forestry Bulletin</journal-id><journal-title-group><journal-title xml:lang="en">Lesnoy Vestnik / Forestry Bulletin</journal-title><trans-title-group xml:lang="ru"><trans-title>Лесной вестник / Forestry Bulletin</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2542-1468</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">706979</article-id><article-id pub-id-type="doi">10.18698/2542-1468-2024-3-124-132</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Wood processing and chemical processing of wood</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Деревообработка и химическая переработка древесины</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Synthesis and properties of modified aminoformaldehyde resins</article-title><trans-title-group xml:lang="ru"><trans-title>Синтез и свойства модифицированных аминоформальдегидных смол</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ekimova</surname><given-names>Mariya Y.</given-names></name><name xml:lang="ru"><surname>Екимова</surname><given-names>Мария Юрьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Tech.), Senior Researcher</p></bio><bio xml:lang="ru"><p>канд. техн. наук, ст. науч. сотр.</p></bio><email>mashula111@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tsvetkov</surname><given-names>Vyacheslav E.</given-names></name><name xml:lang="ru"><surname>Цветков</surname><given-names>Вячеслав Ефимович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Tech.), Academician of the Russian Academy of Sciences, Professor</p></bio><bio xml:lang="ru"><p>д-р техн. наук, академик РАЕН, профессор</p></bio><email>mashula111@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Research and Testing Center 4 of the State Central Interspecific Landfill of the Ministry of Defense of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Научно-испытательный центр 4-го Государственного центрального межвидового полигона Министерства обороны Российской Федерации</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">BMSTU (Mytishchi branch)</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Московский государственный технический университет имени Н.Э. Баумана (национальный исследовательский университет)» (Мытищинский филиал)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-06-29" publication-format="electronic"><day>29</day><month>06</month><year>2024</year></pub-date><volume>28</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>124</fpage><lpage>132</lpage><history><date date-type="received" iso-8601-date="2026-04-29"><day>29</day><month>04</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-04-29"><day>29</day><month>04</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Ekimova M.Y., Tsvetkov V.E.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Екимова М.Ю., Цветков В.Е.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Ekimova M.Y., Tsvetkov V.E.</copyright-holder><copyright-holder xml:lang="ru">Екимова М.Ю., Цветков В.Е.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/2542-1468/article/view/706979">https://journals.eco-vector.com/2542-1468/article/view/706979</self-uri><abstract xml:lang="en"><p>The article presents a method for the synthesis of impregnated modified aminoformaldehyde resins, a distinctive feature of which is the production of resins by alkaline-free catalysis, due to the introduction of a catalyst modifier based on salts of polyfunctional acids, which allows improving the physico-mechanical properties of resins, as well as to reduce the amount of expensive melamine. The synthesis of aminoformaldehyde resins with different molar ratios of melamine and urea to formaldehyde is described in detail by stages, the formulations of resins are given. The presented graphical dependences of the properties of the studied resins clearly show that the introduction of a catalyst modifier allows synthesis at a constant pH value, which leads to a decrease in the content of free formaldehyde, but at the same time the reactivity is preserved. The data on such properties as viscosity, penetration ability, surface tension of the modified aminoformaldehyde resins obtained are also presented. Modification of aminoformaldehyde resins leads to an improvement in the basic technological properties and an increase in their shelf life.</p></abstract><trans-abstract xml:lang="ru"><p>Представлен метод синтеза пропиточных модифицированных аминоформальдегидных смол, отличительной особенностью которого является получение смол бесщелочным катализом, за счет введения модификатора-катализатора на основе солей полифункциональных кислот, позволяющей улучшить физико-механические свойства смол, а также сократить количество дорогостоящего меламина. Подробно и поэтапно описан ход синтеза аминоформальдегидных смол с разным мольным соотношение меламина и карбамида к формальдегиду, приведены рецептуры смол. Приведены графические зависимости свойств исследуемых смол, наглядно показывающие, что введение модификатора-катализатора позволяет провести синтез при постоянном значении рН и приводит к снижению содержания свободного формальдегида, сохраняя реакционную способность. Охарактеризованы такие свойства как вязкость, пенетрационная способность, поверхностное натяжение полученных модифицированных аминоформальдегидных смол. Сделан вывод об улучшении основных технологических свойств и увеличении срока хранения с помощью модифицирования аминоформальдегидных смол.</p></trans-abstract><kwd-group xml:lang="en"><kwd>aminoformaldehyde resins</kwd><kwd>modification</kwd><kwd>alkali-free catalysis</kwd><kwd>melamine</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>аминоформальдегидные смолы</kwd><kwd>модифицирование</kwd><kwd>бесщелочной катализ</kwd><kwd>меламин</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Volynskiy V.N. Tekhnologiya drevesnykh plit i kompozitsionnykh materialov [Technology of wood boards and composite materials]. St. Petersburg: Lan’, 2010, 336 p.</mixed-citation><mixed-citation xml:lang="ru">Волынский В.Н. 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