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Journal articles on the topic 'Urethanes'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Trankina, E. S., A. Yu Kazantseva, D. A. Khanin, et al. "Non-Isocyanate Poly(Siloxane-Urethanes) Based on Oligodimethylsiloxanes Containing Aminopropyl and Ethoxy Substituents." Высокомолекулярные соединения С 65, no. 2 (2023): 164–73. http://dx.doi.org/10.31857/s2308114723700437.

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Environmentally friendly method for the synthesis of crosslinked poly(siloxane-urethanes) avoiding the use of toxic isocyanates has been presented. The synthesis has been performed in two stages: at the first stage, non-isocyanate poly(siloxane-urethanes) have been synthesized via aminolysis of cyclocarbonates (differing in the structure and functionality) with oligomer dimethylsiloxanes bearing aminopropyl and ethoxy substituents, and crosslinked non-isocyanate poly(siloxane-urethanes) have been obtained via hydrolysis of the ethoxy groups with air moisture. According to the TGA data, process

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2

Tennebroek, R., J. Geurts, A. Overbeek, and A. Harmsen. "Self crosslinkable urethanes and urethane-acrylics." Surface Coatings International 83, no. 1 (2000): 13–19. http://dx.doi.org/10.1007/bf02692682.

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3

Jalali, Shakeeba. "APPLICATION OF DYNAMIC MECHANICAL ANALYSIS FOR UV-CURED COATINGS." Chemistry & Material Sciences Research Journal 2, no. 2 (2020): 55–59. http://dx.doi.org/10.51594/cmsrj.v2i2.138.

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The present study is about soya epoxy ester which was made by epoxy resin and fatty acid. Oleochemical polyols were prepared after the soya epoxy ester reacted with various hydroxyl and cellulose based derivatives. These oleochemical polyols were changed to urethanes prepolymers by reacting NCO groups of TDI and IPDI. By utilizing the reaction of NCO end group of urethane with HEMA, these urethanes were transformed in to urethane acrylate oligomer. By mixing the oligomers with various reactive diluents, UV curable coating compositions were derived. The methodology was based on dynamic mechanic

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4

Endo, Takeshi, and Atsushi Sudo. "Well-Defined Construction of Functional Macromolecular Architectures Based on Polymerization of Amino Acid Urethanes." Biomedicines 8, no. 9 (2020): 317. http://dx.doi.org/10.3390/biomedicines8090317.

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Polypeptide synthesis was accomplished using the urethane derivatives of amino acids as monomers, which can be easily prepared, purified, and stored at ambient temperature without the requirement for special precautions. The urethanes of amino acids are readily synthesized by the N-carbamoylation of onium salts of amino acids using diphenyl carbonate (DPC). The prepared urethanes are then efficiently cyclized to produce amino acid N-carboxyanhydrides (NCAs). Thereafter, in the presence of primary amines, the ring-opening polymerization (ROP) of NCAs is initiated using the amines, to yield poly

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5

More, Ganesh Sunil, and Rajendra Srivastava. "Synthesis of amino alcohols, cyclic urea, urethanes, and cyclic carbonates and tandem one-pot conversion of an epoxide to urethanes using a Zn–Zr bimetallic oxide catalyst." Sustainable Energy & Fuels 5, no. 5 (2021): 1498–510. http://dx.doi.org/10.1039/d0se01912g.

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The one-pot tandem synthesis of urethanes directly from an epoxide, with urea in solvent-free condition using Zn<sub>2</sub>ZrOx is demonstrated. The catalyst exhibits excellent activity in cyclic urea, urethane, and cyclic carbonate production in neat conditions.

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6

Tanzi, Maria Cristina, Diego Mantovani, Paola Petrini, Robert Guidoin, and Ga�tan Laroche. "Chemical stability of polyether urethanes versus polycarbonate urethanes." Journal of Biomedical Materials Research 36, no. 4 (1997): 550–59. http://dx.doi.org/10.1002/(sici)1097-4636(19970915)36:4<550::aid-jbm14>3.0.co;2-e.

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7

Wang, Hai Yan, Yu Wen Liu, Ji Feng Tian, Bin Sun, and Shi Jie Huang. "FT-IR Analysis of Molecular Structure Evolvement of Poly(Ether urethanes) in Ozone Atmosphere." Advanced Materials Research 742 (August 2013): 215–19. http://dx.doi.org/10.4028/www.scientific.net/amr.742.215.

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The failure behavior of Poly (ether urethanes) in ozone atmosphere was investigated by FTIR, UV-Vis spectra and SEM analysis. It is found that some oxygen-containing groups such as the hydroxyl group and the carbonyl group increase first and then slightly decrease with the ozone oxidation time and the carbohydryl and ether bonds decrease slowly. After oxidation by ozone, the polyurethane molecule chains break on C-O in ether and urethane groups instead of chain crosslinking. In addition, ozone oxidization increases the color difference and lowers the UV light transparence of polyurethane.

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8

Hicks, D. A., M. Krommenhoek, D. J. Soderberg, and J. F. G. Hopper. "Polyurethanes Recycling and Waste Management." Cellular Polymers 13, no. 4 (1994): 259–76. http://dx.doi.org/10.1177/026248939401300401.

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Almost everybody in the urethanes industry is by now familiar with the different options for the recycling of urethane-based materials. Physical recycling (fillers in the polyol), chemical recycling (glycolysis, hydrolysis) and energy recovery are the main options under development. The actual process, however, is only a part of the equation. Disassembly, logistics, applications for recycled materials and market size are other vital elements for success. In this paper, progress is presented on the different recycling options, in conjunction with a cost model which has been developed especially

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9

Sysoev, Vladislav A., Renat R. Nazmutdinov, Alfiya R. Garifullina, Tamara T. Zinkicheva, and Marina N. Kalukova. "THERMODYNAMIC ASPECTS OF AMINOLYSIS PROCESSES OF UNSYMMETRIC ALKYLENE CARBONATES." Technologies & Quality 66, no. 4 (2024): 42–46. https://doi.org/10.34216/2587-6147-2024-4-66-42-46.

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The article analyzes the peculiarity of the reaction of urethane formation of alkylene carbonate – amine. Using quantum chemical calculations using the B3LYP hybrid functional embedded in the Gaussian-16 software package, the authors evaluated the thermodynamic feasibility of the presented reactions. The results obtained under the specified standard conditions showed that the interaction of asymmetric alkylene carbonates with amines leads to the formation of a mixture of isomeric urethane alcohols containing primary and secondary hydroxyls. Moreover, the ratio of isomers and the thermodynamic

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10

Kalukova, Marina N., Vladislav A. Sysoev, and Alfiya R. Garifullina. "THE EFFECT OF HYDROXYL-CONTAINING LOW-MOLECULAR URETHANES ON HYGIENIC CHARACTERISTICS OF CLOTHING LEATHER." Technologies & Quality 59, no. 1 (2023): 16–19. http://dx.doi.org/10.34216/2587-6147-2023-1-59-16-19.

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In this paper, the main hygienic properties of clothing leather made from sheepskin treated with solutions of hydroxyl-containing non-isocyanate urethanes are investigated in order to reduce the use of chromium compounds. The article presents the values of vapour permeability, wetness, hygroscopicity, mois- ture loss, porosimetry data. It has been established that as a result of processing a semi-finished product of clothing leather from sheepskin with synthesised urethanes, the welding temperature increased by 5…9 °C. Indicators of hygroscopicity and moisture loss do not differ significantly

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11

Semetey, Vincent, and Benoît Rhoné. "Base-Catalyzed Transcarbamoylation." Synlett 28, no. 15 (2017): 2004–7. http://dx.doi.org/10.1055/s-0036-1588866.

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Inorganic bases such as NaH, KOt-Bu, NaOH, or KOH are efficient catalysts to promote the transcarbamoylation reaction between urethanes and a variety of primary and secondary alcohols under mild conditions. They constitute an alternative to organometallic catalysis and can be applied to aliphatic or aromatic urethanes.

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12

Garifullina, A. R., and M. V. Antonova. "The Use of Non-isocyanate Urethanes in the Chrome-saving Technology of the Manufacture of Fur Raw Materials." Ecology and Industry of Russia 28, no. 8 (2024): 38–41. http://dx.doi.org/10.18412/1816-0395-2024-8-38-41.

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The possibilities of reducing the negative impact of chrome tanning agents on the environment are considered. Special attention is paid to the chrome-saving technology of dressing fur raw materials with pretreatment with non-toxic non-isocyanate urethanes. The results of a study on reducing the concentration of chromium in the working solution using functional non-isocyanate urethanes are presented. The object of the study is the raw material of fur sheepskin. It was revealed that the introduction of pretreatment with non-isocyanate urethanes before chrome tanning of fur raw materials allows r

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13

Ryszkowska, Joanna, and Bartlomiej Wasniewski. "Synthesis of Urea-Nitryle-Urethanes with Aid of Microwaves." Materials Science Forum 587-588 (June 2008): 582–86. http://dx.doi.org/10.4028/www.scientific.net/msf.587-588.582.

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Polymerisation of urea-nitryle-urethanes performed in electric heating devices. It was suggested to manufacture these materials using microwave radiation as the heat source. As a part of this research project urea urethanes were fabricated using various strength of microwave radiation. The structure and properties of manufactured materials were investigated.

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14

Minagawa, Keiji, Hirokazu Okamura, Seizo Masuda, and Masami Tanaka. "NMR Analysis of Molecular Motion of Polyurethane Fluid." International Journal of Modern Physics B 13, no. 14n16 (1999): 1975–82. http://dx.doi.org/10.1142/s0217979299002034.

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Urethane modified polyethers having hard-soft-hard structure were prepared as simple model compounds for homogeneous ER fluids. The NMR relaxation analysis was applied to these polyurethane ER fluids, and the molecular motions and interactions were studied with a series of the data of spin-lattice relaxation time T 1 and the spin-spin relaxation time T 2. Two hard-soft-hard urethanes, which showed opposite ER effects, were found to have similar relaxation behaviors under no electric field. The temperature dependence of T 1 indicated existence of significant intermolecular interaction and the c

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15

Godovskii, Yu K., N. P. Byessonova, N. N. Mironova, and M. P. Letunovskii. "Thermoelasticity of polyester urethanes." Polymer Science U.S.S.R. 31, no. 5 (1989): 1041–48. http://dx.doi.org/10.1016/0032-3950(89)90043-9.

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16

Krishnan, Kris. "Hydrophilic Urethanes for Textiles." Journal of Coated Fabrics 23, no. 1 (1993): 54–66. http://dx.doi.org/10.1177/152808379302300108.

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17

Sharma, Bhaskar, Luc Ubaghs, Helmut Keul, Hartwig Höcker, Ton Loontjens та Rolf van Benthem. "Microstructure and Properties of Poly(amide urethane)s: Comparison of the Reactivity ofα-Hydroxy-ω-O-phenyl Urethanes andα-Hydroxy-ω-O-hydroxyethyl Urethanes". Macromolecular Chemistry and Physics 205, № 11 (2004): 1536–46. http://dx.doi.org/10.1002/macp.200400056.

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18

Elsner, Jonathan J., and Brian P. McKeon. "Orthopedic Application of Polycarbonate Urethanes." Techniques in Orthopaedics 32, no. 3 (2017): 132–40. http://dx.doi.org/10.1097/bto.0000000000000216.

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19

STOICA, GH, A. STANCIU, V. COZAN*, A. STOLERIU, and D. TIMPU. "New Aromatic Poly(Azomethine Urethanes)." Journal of Macromolecular Science, Part A 35, no. 3 (1998): 539–46. http://dx.doi.org/10.1080/10601329808001995.

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20

Thames, S. F., and K. G. Malone. "Arylsilane urethanes of superior weatherability." Progress in Organic Coatings 25, no. 3 (1995): 275–81. http://dx.doi.org/10.1016/0300-9440(94)00509-y.

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21

Hiltunen, Kari, Jukka V. Sepp�l�, and Mika H�rk�nen. "Lactic acid based poly(ester-urethanes): Use of hydroxyl terminated prepolymer in urethane synthesis." Journal of Applied Polymer Science 63, no. 8 (1997): 1091–100. http://dx.doi.org/10.1002/(sici)1097-4628(19970222)63:8<1091::aid-app16>3.0.co;2-9.

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22

Ogbu, Ikechukwu Martin, Jonathan Lusseau, Gülbin Kurtay, Frédéric Robert, and Yannick Landais. "Urethanes synthesis from oxamic acids under electrochemical conditions." Chemical Communications 56, no. 81 (2020): 12226–29. http://dx.doi.org/10.1039/d0cc05069e.

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23

Nadzeyka, Ingo, Eleonore Bolle, Martin Moos, Paula Kunitz, Ulrich Steinseifer, and Thomas Schmitz-Rode. "Process analysis of spray atomization of dissolved polymers for manufacturing of blood-compatible textile implants." Journal of Industrial Textiles 48, no. 5 (2017): 926–40. http://dx.doi.org/10.1177/1528083717747336.

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The use of porous polymer materials for vascular prostheses demonstrates promising results. Fleece-like non-woven structures can be generated by atomization of dissolved polycarbonate urethanes. This article focuses on the manufacturing process for the fleece structures. The solution is atomized through a high-volume low-pressure nozzle. The solvent evaporates during time of flight to target, so that small fibres are formed from each drop of solution. By using different rotating molds and positioning systems, tubular shapes or open surfaces can be generated. The manufacturing process is descri

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24

González-García, Dulce, Ángel Marcos-Fernández, Luis Rodríguez-Lorenzo, Rodrigo Jiménez-Gallegos, Nancy Vargas-Becerril, and Lucía Téllez-Jurado. "Synthesis and in Vitro Cytocompatibility of Segmented Poly(Ester-Urethane)s and Poly(Ester-Urea-Urethane)s for Bone Tissue Engineering." Polymers 10, no. 9 (2018): 991. http://dx.doi.org/10.3390/polym10090991.

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Two series of segmented polyurethanes were obtained and their mechanical and thermal properties as well as their biodegradability and cytotoxicity were evaluated. The chemical nature of the polyurethanes was varied by using either 1,4 butanediol (poly-ester-urethanes, PEUs) or l-lysine ethyl ester dihydrochloride (poly-ester-urea-urethanes, PEUUs) as chain extenders. Results showed that varying the hard segment influenced the thermal and mechanical properties of the obtained polymers. PEUs showed strain and hardness values of about 10–20 MPa and 10–65 MPa, respectively. These values were highe

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25

Zur, Eitan. "Polyurea – The New Generation of Lining and Coating." Advanced Materials Research 95 (January 2010): 85–86. http://dx.doi.org/10.4028/www.scientific.net/amr.95.85.

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Few seconds setting time, superior flexibility along with high mechanical strength and moisture insensitivity are only a small portion of the characteristics of the unique technology named Polyurea. This technology is on the move around the globe and recently some intriguing projects were done also in Israel. This paper is a brief introduction of the Polyurea technology. Nearly two decades ago, a new technology was introduced to the world. It was not an innovative semi-flexible Epoxy, with a better UV stability. Nor was it a new kind of fast set Urethane, with improved chemical resistance. Rat

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26

Brown, R. H., P. A. Ellwood, J. A. Groves, and S. M. Robertson. "New Methods for the Determination of Airborne Isocyanates." Cellular Polymers 6, no. 6 (1987): 1–8. http://dx.doi.org/10.1177/026248938700600601.

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Two new methods for the measurement of atmospheric isocyanates are under development to complement the HPLC-electrochemical method currently used by the Health and Safety Executive (Methods for the Determination of Hazardous Substances, MDHS 25). The first is a general method for total isocyanate groups, in which sampled isocyanates are converted into urethanes by reaction with propanol in a bubbler. After removal of the excess propanol by evaporation, the urethanes are hydrolysed and propanol is released in an amount proportional to the original NCO groups present. The released propanol is de

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27

Pawar, Govind Goroba, Frédéric Robert, Etienne Grau, Henri Cramail, and Yannick Landais. "Visible-light photocatalyzed oxidative decarboxylation of oxamic acids: a green route to urethanes and ureas." Chemical Communications 54, no. 67 (2018): 9337–40. http://dx.doi.org/10.1039/c8cc05462b.

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28

Lian, Li Ming, Bing Leng, and Xiao Hua Ma. "Preparation and Characterization of Heparin-Immobilized Poly(Ether Urethanes)." Advanced Materials Research 393-395 (November 2011): 236–39. http://dx.doi.org/10.4028/www.scientific.net/amr.393-395.236.

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Heparin (Hep)-immobilized poly(ether urethanes) (PU) was prepared by a unique preparation procedure. Firstly, the poly(ether urethanes)(PU) containing diester groups in the side chains were synthesized. Then, PU was dispersed in aqueous solutions and immobilized with heparin after the hydrolysis of diester groups and carboxylation. The Fourier transform infrared spectroscopy (FTIR) and water contact angle (WCA) were used to characterize the heparin-bonded PU. The amount of heparin grafted on the PU was determined to be 0.57wt.% by the toluidine blue method. The heparin-immobilized PU could rel

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29

Wright, Andrew D., Richard D. Bowen, and Keith R. Jennings. "Chemical ionization mass spectra of urethanes." Journal of the Chemical Society, Perkin Transactions 2, no. 10 (1989): 1521. http://dx.doi.org/10.1039/p29890001521.

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30

Huang, Samuel J., and Mark S. Roby. "Biodegradable Polymers Poly(amide-urethanes) [1]." Journal of Bioactive and Compatible Polymers 1, no. 1 (1986): 61–71. http://dx.doi.org/10.1177/088391158600100106.

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31

Coogan, Richard G. "Post-crosslinking of water-borne urethanes." Progress in Organic Coatings 32, no. 1-4 (1997): 51–63. http://dx.doi.org/10.1016/s0300-9440(97)00010-6.

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32

SHORT, PATRICIA. "Urethanes Boosted By Bayer, Dow Chemical." Chemical & Engineering News 78, no. 22 (2000): 42–43. http://dx.doi.org/10.1021/cen-v078n022.p042.

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33

Sabne, M. B. "Thermal stability of cellulose acetate urethanes." Polymer Degradation and Stability 16, no. 1 (1986): 47–52. http://dx.doi.org/10.1016/0141-3910(86)90099-6.

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34

Martina, Stefano, Scott A. MacDonald, and Volker Enkelmann. "Photosensitive Tetramethylpiperidine Urethanes: Synthesis and Characterization." Journal of Organic Chemistry 59, no. 12 (1994): 3281–83. http://dx.doi.org/10.1021/jo00091a012.

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35

Thota, V., D. D. Nage, and M. Suresh. "High performance coatings: moisture cured urethanes." Transactions of the IMF 91, no. 5 (2013): 237–40. http://dx.doi.org/10.1179/0020296712z.00000000064.

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36

Oltchik, N., S. Freireich, and A. Zilkha. "Aliphatic polyisocyanurate-urethanes for paper coatings." European Polymer Journal 24, no. 5 (1988): 479–83. http://dx.doi.org/10.1016/0014-3057(88)90089-4.

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37

Wang, Qiong, Howard D. Stidham, and F. Papadimitrakopolos. "A spectroscopic study of model urethanes." Spectrochimica Acta Part A: Molecular Spectroscopy 50, no. 3 (1994): 421–33. http://dx.doi.org/10.1016/0584-8539(94)80158-4.

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38

Smith, R., D. F. Williams, and C. Oliver. "The biodegradation of poly(ether urethanes)." Journal of Biomedical Materials Research 21, no. 9 (1987): 1149–65. http://dx.doi.org/10.1002/jbm.820210908.

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39

van Leusen, A. M., та J. Strating. "Chemistry of α-diazosulfones: Part IV. The preparation of N-(arylsulfonylmethyl)urethanes and N-(alkylsulfonylmethyl)urethanes". Recueil des Travaux Chimiques des Pays-Bas 84, № 2 (2010): 140–50. http://dx.doi.org/10.1002/recl.19650840202.

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40

Barrera-Nava, Miriam P., Rodrigo Navarro, Ángel Marcos-Fernández та José E. Báez. "Synthesis and characterization of macrodiols and non-segmented poly(ester-urethanes) (PEUs) derived from α,ω-hydroxy telechelic poly(ε-caprolactone) (HOPCLOH): effect of initiator, degree of polymerization, and diisocyanate". RSC Advances 14, № 37 (2024): 27241–51. http://dx.doi.org/10.1039/d4ra03951c.

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41

Faccia, Paula A., Francisco M. Pardini, Ana Carolina Agnello, Javier I. Amalvy, and María T. Del Panno. "Degradability of poly(ether-urethanes) and poly(ether-urethane)/acrylic hybrids by bacterial consortia of soil." International Biodeterioration & Biodegradation 160 (May 2021): 105205. http://dx.doi.org/10.1016/j.ibiod.2021.105205.

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42

Brossier, Thomas, Gael Volpi, Vincent Lapinte, and Sebastien Blanquer. "Synthesis of Poly(Trimethylene Carbonate) from Amine Group Initiation: Role of Urethane Bonds in the Crystallinity." Polymers 13, no. 2 (2021): 280. http://dx.doi.org/10.3390/polym13020280.

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Semi-crystalline poly(trimethylene carbonate) (PTMC) can be efficiently prepared by ring-opening polymerization (ROP) initiated by amine using various catalysts. More promising results were reached with the one-step process of stannous octanoate unlike the two-step one-pot reaction using TBD and MSA catalysts. The ROP-amine of TMC consists in a simple isocyanate free process to produce polycarbonate-urethanes, compatible with the large availability of amines ranging from mono- to multifunctional until natural amino acids. ROP-amine of TMC leads to urethane bonds monitored by FTIR spectroscopy.

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43

Ferraro, Luiz Gustavo, Felipe Bastos de Souza Alvarenga, Maria Virginia Gelfuso, and Daniel Thomazini. "Investigation to Obtain Polyols from Residual Frying Oil." Materials Science Forum 775-776 (January 2014): 351–56. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.351.

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. Polymeric materials based on petroleum have generated a major problem for the environment because they are produced by non-renewable sources. Many studies are being conducted to propose alternatives to obtain polymers from renewable raw materials sources. The disadvantage of this alternative is the use of food sources for polymer production but this is avoided when using the residual frying oil. Aiming to obtain polymer-based urethanes, pretreated residual frying oil samples were submitted to various conditions of hydroxylation and analyzed by FT-IR, where it was possible to observe the pres

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44

Volkov, I. O., L. V. Filimonova, L. I. Makarova, et al. "Studying the structure of polysiloxane carbonate urethanes." Bulletin of the Russian Academy of Sciences: Physics 78, no. 9 (2014): 878–80. http://dx.doi.org/10.3103/s1062873814090329.

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45

García-Alles, Luis F., Francisco Morís, and Vicente Gotor. "Chemo-enzymatic synthesis of 2′-deoxynucleoside urethanes." Tetrahedron Letters 34, no. 39 (1993): 6337–38. http://dx.doi.org/10.1016/s0040-4039(00)73746-4.

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46

Badamshina, E. R., and M. P. Gafurova. "Hydroxylated fullerenes and fullerene-containing poly(urethanes)." Polymer Science Series B 49, no. 7-8 (2007): 182–90. http://dx.doi.org/10.1134/s1560090407070044.

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47

Sarkar, Suparna, Piyali Basak, and Basudam Adhikari. "Biodegradation of Polyethylene Glycol-Based Polyether Urethanes." Polymer-Plastics Technology and Engineering 50, no. 1 (2011): 80–88. http://dx.doi.org/10.1080/03602559.2010.531415.

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48

Bhattacharyya, J. "Torque Rheology in Measuring Crosslinking of Urethanes." Journal of Elastomers & Plastics 18, no. 2 (1986): 85–95. http://dx.doi.org/10.1177/009524438601800204.

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49

Young Se Oh and Kim Byung Kyu. "Crosslinkings of polyacrylonitrile using NCO terminated urethanes." Polymer 38, no. 20 (1997): 5211–16. http://dx.doi.org/10.1016/s0032-3861(97)00020-7.

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50

Atovmyan, E. G., L. L. Alimova, and O. S. Filipenko. "Hydrogen bonding and crystal structure of urethanes." Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 38, no. 5 (1989): 976–80. http://dx.doi.org/10.1007/bf00955428.

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