Results 251 to 260 of about 190,308 (299)
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Formaldehyde surface emission monitor
Analytical Chemistry, 1984A passive surface emission monitor has been developed for nondestructive measurement of formaldehyde (CH/sub 2/O) emission rates from CH/sub 2/O resin-containing materials such as urea-formaldehyde foam insulation (UFFI) and pressed-wood products. Emitted CH/sub 2/O is sorbed by a planar distribution of 13X molecular sleve supported inside the monitor ...
T. G. Matthews +5 more
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Formaldehyde emission from particleboard
Holz als Roh- und Werkstoff, 1981A test method is described and experimental data are presented which compare formaldehyde emissions from edges and surfaces of particleboards. Surface emissions from boards of different structures and resins are also presented. Porosity of particleboards was measured and related to formaldehyde emission.
R. Christensen, P. Robitschek, J. Stone
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Controlling Formaldehyde Emissions with Boiler Ash
Environmental Science & Technology, 2005Fluidized wood ash reduces formaldehyde in air from about 20 to
Jennifer, Cowan +2 more
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Production of melamine fortified urea‐formaldehyde resins with low formaldehyde emission
Journal of Applied Polymer Science, 2011AbstractMelamine can be incorporated in the synthesis of urea‐formaldehyde (UF) resins to improve performance in particleboards (PB), mostly in terms of hydrolysis resistance and formaldehyde emission. In this work, melamine‐fortified UF resins were synthesized using a strong acid process.
Nádia T. Paiva +5 more
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Reduction of formaldehyde emission from plywood
Journal of Adhesion Science and Technology, 2013The aim of this work is to evaluate performances of tannin-based resins designed as adhesive in the plywood production. For this purpose, a part of phenol formaldehyde (PF) and melamine formaldehyde (MF) in the classic adhesive formulation was replaced by tannin. The physical properties of the formulated resins (rheological characterization, etc.) were
Marzieh Gangi +3 more
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Verminderung der Formaldehyd-Emission von Möbeln
Holz als Roh- und Werkstoff, 1981Aus Spanplatten gefertigte Mobel konnen Formaldehyd an die Raumluft abgeben. Der Formaldehyd entweicht uber offene Schmalflachen, Frasnuten, Bohr- und Schlussellocher. Auch durch wenig gasdichte Beschichtungen kann Formaldehyd ausstromen. Durch Abdichtung offener Oberflachen sowie Verwendung formaldehydarmer Spanplatten kann die Formaldehydemission ...
R. Marutzky, L. Mehlhorn, W. Menzel
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Formaldehyde-free varnishing on stator core sheets to prevent formaldehyde emissions
2015 IEEE Electrical Insulation Conference (EIC), 2015Formaldehyde has been identified as a hazardous gas and a number of European countries have set limits on the tolerated concentrations of it in working areas. Alstom tested and analyzed the standard varnishes in use for the past 20 years and compared them to newly developed varnishes.
T. Klamt, E. Béchir
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Journal of Applied Polymer Science, 2005
AbstractA modified urea–formaldehyde resin was synthesized by the condensation of urea and formaldehyde in the presence of varying proportions of casein up to 25% (w/w) of urea under alkaline conditions. All the prepared resins were characterized by free‐formaldehyde content, viscosity measurements, and number‐average molecular weight determination by ...
D. K. Raval, B. N. Narola, A. J. Patel
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AbstractA modified urea–formaldehyde resin was synthesized by the condensation of urea and formaldehyde in the presence of varying proportions of casein up to 25% (w/w) of urea under alkaline conditions. All the prepared resins were characterized by free‐formaldehyde content, viscosity measurements, and number‐average molecular weight determination by ...
D. K. Raval, B. N. Narola, A. J. Patel
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Melamine formaldehyde foam with reduced formaldehyde emission.
2020Method for lowering the formaldehyde emissions of melamine/formaldehyde polymer moldings, films or fibers by impregnating the melamine/formaldehyde polymer moldings, films or fibers with an aqueous solution of at least one formaldehyde scavenger.
Weisse, Alexander Sebastian +6 more
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Preparation of cured urea–formaldehyde resins of low formaldehyde emission
Journal of Applied Polymer Science, 1984Several polymers containing amino or amido groups and biuret were tested as additives to ureaformaldehyde (UF) resin in order to neutralize its inherent acidity and combine free formaldehyde released upon hydrolysis of cured UF polycondensate. Each modifier was incorporated to liquid methylolureas at weight ratios of 1:100, 2:100, and 3:100 prior to ...
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