Powdered Paper-Resin Films as Reactive Fillers for Urea-Formaldehyde Resins. P. 153–166

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UDС

674-419:676.266.4:665.939.56

DOI:

10.37482/0536-1036-2022-3-153-166

Abstract

Powdered paper-resin films (PRF) composed of melamine-urea-formaldehyde resin and bleached pulp seem to be promising fillers for plywood glues as they increase the viscosity of the glue composition and interact chemically with the components of ureaformaldehyde resins. It is generally accepted that when 4–6 % PRF is mixed with ureaformaldehyde resin, the viscosity of the glue increases by 80–110 %, however the increase in viscosity is followed by an increase in the gelatinization time of the glue by 25–35 %. The reactivity of the films defined by the polycondensation rate of urea- and melamine-ureaformaldehyde oligomers was studied by determining the residual hydroxymethyl groups in the cured adhesive compositions. Our results show that when we add PRF into the resin, the content of unreacted hydroxymethyl groups increases from 1.0 % of a composition without any fillers to 2.5 % of a composition with 10 % of films in it. We found that the content of unreacted hydroxymethyl groups in the cured glue depends on the gelatinization time of the glue composition by 90 %. To speed up the glue curing, we replaced the ammonium chloride with a more effective curing agent МО-4СБ (Russian abbreviation), which helps to reduce the time of gelatinization time by 15 % for a mass fraction of 4–5 %. The content of hydroxymethyl groups in the cured glue with 4 % of PRF and 4–5 % of МО-4СБ was 0.6–0.7 %, which is 30–40 % less than in the resin without fillers. Samples of 3-layer plywood that contain 4 % of filler and 4 % of modifier-curing agent МО-4СБ had a glued seam that was 5 % stronger that of a control plywood sample which consisted of 8 % of kaolin and 1% of ammonium chloride. The increase in strength has reduced the rate of glue consumption by 15 % while meeting the requirements of the State Standard GOST 3916.1–2018 for the physical and mechanical parameters. As a result, using 4 % PRF as a filler for glue made from urea-formaldehyde resin helps to increase the viscosity of the glue on par with other mineral fillers. In addition, it increases the strength and the water resistance of the cured polymer. The growth of the physical and mechanical parameters occurs due to the polycondensation of urea- and melamine-urea-formaldehyde oligomers. However, an acceptable reaction rate requires the use of more effective curing agents than ammonium chloride.

Authors

Daniil V. Ivanov¹, Candidate of Engineering, Senior Lecturer;
ResearcherID: ABF-7853-2020, ORCID: https://orcid.org/0000-0002-0001-2461
Ksenya E. Baka², Laboratory Engineer; ResearcherID: AAN-1221-2021, ORCID: https://orcid.org/0000-0002-4826-7666
Daria A. Konareikina¹, Specialist in Educational and Methodological Work; ResearcherID: ABF-7854-2020, ORCID: https://orcid.org/0000-0003-3108-3016

Affiliation

¹Saint-Petersburg State Forest Technical University named after S.M. Kirov, Institutskiy per., 5, Saint Petersburg, 194021, Russian Federation; ivanov.d.v.spb@74.ru, dashakonareikina2012@yandex.ru
²Joined Stock Company “FANPLAST”, ul. Dnepropetrovskaya, 8, Saint Petersburg, 191119, Russian Federation; ksenyabaca@gmail.com

Keywords

paper-resin films, urea-formaldehyde resin, melamine-formaldehyde resin, hydroxymethyl groups, fillers, modifier-curing agent, particle boards, plywood

For citation

Ivanov D.V., Baka K.E., Konareikina D.A. Powdered Paper-Resin Films as Reactive Fillers for Urea-Formaldehyde Resins. Lesnoy Zhurnal = Russian Forestry Journal, 2022, no. 3, pp. 153–166. (In Russ.). https://doi.org/10.37482/0536-1036-2022-3-153-166

References

1. Barash L.I. Laminates and Decorative Surfaces. Saint Petersburg, Khimizdat Publ., 2007. 256 p. (In Russ.).

2. Volkov A.V., Kondrat’yev V.P., Orlov A.T., Red’kina T.P., Shevando T.V., Shornikova N.Yu., Varygin V.S., Filippova E.O., Sokolova E.G. Handbook of Plywood Producer. Saint Petersburg, SPbPU Publ., 2010. 486 p. (In Russ.).

3. Gamova I.A., Abramov N.A., Chernysheva E.S. Waste Processing of Decorative Paper-Resin Films. Wood Boards: Theory and practice. Proceedings of the 22nd International Scientific and Practical Conference. Saint Petersburg, SPbPU Publ., 2019, pp. 48–52. (In Russ.).

4. Ivanov D.V., Ekaterincheva M.A., Kalashnikov A.A., Pechkovskaya D.A., Nikiforova P.K., Eliseyev D.M. The Use of МО-4 Series Modifiers-Hardening Agents as Components of Urea-Formaldehyde Resin Glues. Wood Boards: Theory and practice. Proceedings of the 24th International Scientific and Practical Conference. Saint Petersburg, Politekh-Press, 2021, pp. 110–117. (In Russ.).

5. Kasterina T.N., Kalinina L.S. Chemical Methods for Studying Synthetic Resins and Plastics. Moscow, Goskhimizdat Publ., 1963. 288 p. (In Russ.).

6. Kondrat’yev V.P., Doronin Yu.G. Waterproof Glues for Woodworking. Moscow, Lesnaya promyshlennost’ Publ., 1988. 216 p. (In Russ.).

7. Murzin V.S., Kantiyeva E.V., Ponomarenko L.V. Efficiency of Fillers in the Production of Plywood Based on Low-Toxic Urea-Formaldehyde Resins. Forestry Engineering Journal, 2012, no. 3(7), pp. 20–24. (In Russ.).

8. Permyakov A.V., Gamova I.A., Ivanov D.V. Modification of Plywood Glue with Shredded Waste of Paper-Resin Films. Wood Boards: Theory and practice. Proceedings of the 24th International Scientific and Practical Conference. Saint Petersburg, Politekh-Press, 2021. pp. 94–98. (In Russ.).

9. Plotnikova G.P., Plotnikov N.P. Modification of Binder to Use Off-Grade Raw Materials in Chipboard Production. Systems. Methods. Technologies, 2013 vol. 2(18), pp. 142–146. (In Russ.).

10. Romanov N.M. Hardening of Urea-Formaldehyde and Melamine-Formaldehyde Resins Mixtures. Existence of Critical Ratios. State and Prospects for the Development of Wood Based Panels: Abstracts of the International Scientific and Practical Conference. Balabanovo, 2006, pp. 76–85. (In Russ.).

11. Roffael E. Die Formaldehyd-Abgabe von Spanplatten und anderen Welkstoffen. Transl. from German by A.P. Shtembakh and V.B. Semyonova. Ed. by A.A. El’bert. Moscow, Ekologiya Publ., 1991. 160 p. (In Russ.).

12. Urea-Formaldehyde Resin КФМТ-15. PKF Povolzhye. (In Russ.).

13. Shishakov E.P., Shpak S.I., Chubis P.A., Shevchuk M.O. Fillers and Catalysts Effect on the Physicochemical Properties of Urea-Formaldehyde Resins. Proceedings of BSTU, Series 4. Chemistry, Organic Substances, Technology and Biotechnology, 2015, no. 4(177), pp. 102–108. (In Russ.).

14. El’bert A.A. Chemical Technology of Particle Boards. Moscow, Lesnaya promyshlennost’ Publ., 1984. 224 p. (In Russ.).

15. Ayrilmis N., Kwon J.-H., Lee S.-H., Han T.-H., Park C.-W. Microfibrillated-Cellulose Modified Urea-Formaldehyde Adhesives with Different F/U Molar Ratios for Wood Based Composites. Journal of Adhesion Science and Technology, 2016, vol. 30, iss. 18, pp. 2032–2043. https://doi.org/10.1080/01694243.2016.1175246

16. Cui H.-W., Du G.-B. Development of a Novel Polyvinyl Acetate Type Emulsion Curing Agent for Urea Formaldehyde Resin. Wood Science and Technology, 2013, vol. 47, iss. 1, pp. 105–119. https://doi.org/10.1007/s00226-012-0489-4

17. Dziurka D., Mirski R. Properties of Liquid and Polycondensed UF Resin Modified with pMDI. Drvna Industrija, 2014, vol. 65, no. 2, pp. 115–119. https://doi.org/10.5552/drind.2014.1321

18. Edoga M. Ethylated Urea-Ether-Modified Urea-Formaldehyde Resins, Part I: Structural and Physic Chemical Properties. Leonardo Electronic Journal of Practices and Technologies, 2006, vol. 5(9), pp. 121–136.

19. Kunaver M., Medved S., Čuk N., Jasiukaitytė E., Poljanšek I., Strnad T. Application of Liquefied Wood as a New Particle Board Adhesive System. Bioresource Technology, 2010, vol. 101, iss. 4, pp. 1361–1368. https://doi.org/10.1016/j.biortech.2009.09.066

20. Wang Z., Xue J.W., Qu J.B., Liu W.X. Synthesis of Wood Lignin-Urea-Formaldehyde Resin Adhesive. Advanced Materials Research, 2012, vol. 560-561, pp. 242–246. https://doi.org/10.4028/www.scientific.net/AMR.560-561.242