Results 181 to 190 of about 3,694 (226)
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Glass fiber reinforced rigid polyurethane foams
Journal of Materials Science, 2010Rigid polyurethane foam (RPUF)/glass fiber composites have been fabricated from glass fiber, polymeric 4,4′-di-phenylmethane diisocyanate (PMDI) and polypropylene glycols (PPG) using HFC 365mfc as blowing agent. Thermal conductivity, glass transition and decomposition temperatures as well as the mechanical strengths of the foam increased with the ...
S. H. Kim +3 more
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Rowanberry/vermiculite modified rigid polyurethane foams
Journal of Cellular PlasticsRigid polyurethane (PU) foams were modified with rowanberry/vermiculite fillers. The impact of fillers on selected properties of composites, such as rheological properties (dynamic viscosity, foaming behavior), mechanical properties (compressive and flexural strength, toughness), thermal properties (temperature of thermal decomposition stages, char ...
Karolina Miedzińska +4 more
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Kraft Lignin-Based Rigid Polyurethane Foam
Journal of Wood Chemistry and Technology, 2012Abstract Kraft pine lignin was derivatized to a liquid polyol through oxypropylation. The resulting polyol was characterized by GPC, FT-IR, H1, C13, and P31 NMR and was compared to commercial polyols in view of the mechanical property of the corresponding rigid polyurethane foams for the first time.
Yang Li, Arthur J. Ragauskas
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Preparation of Rigid Polyurethane-Imide Foams
Advanced Materials Research, 2010A novel rigid polyurethane thermosetting foam is synthesized via the reaction of isocyanate terminated polyimide prepolymers with polyether polyol(4110), and deionized water and n-pentane are used for blowing agents simultaneously. The prepolymers and polymers are characterized by conventional methods and -NCO conversion rate, characteristic structure ...
Xiao Ming Sang +3 more
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RESIN POLYURETHANE, FOAM-IN-PLACE, RIGID
2017<div class="section abstract"> <div class="htmlview paragraph">This specification covers polyurethane systems consisting of an isocyanate component and other components containing a polyol and other ingredients which, when mixed and cured, produce thermosetting, rigid, cellular products.</div></div>
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Component analysis of rigid polyurethane foams
Fire Safety Journal, 1977Abstract A procedure is described for the analysis of the component parts of a rigid polyurethane foam. The technique can be used to identify the polyol, isocyanate, fire retardant, and blowing agent used in foam manufacture when less than 0.5 g of material is available.
N.A. Mumford +2 more
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CORE, POLYURETHANE FOAM (POLYETHER) Rigid, Cellular
2017<div class="section abstract"> <div class="htmlview paragraph">This specification and its supplementary detail specifications cover rigid, cellular polyurethane or polyisocyanurate (polyether only) foam in the form of board or block.</div></div>
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OPEN-CELL RIGID POLYURETHANE FOAMS
2000The invention relates to open-cell rigid foams, containing urethane and/or isocyanurate groups and/or urea groups. Said rigid foams are produced using a polyol component which contains long-chain polyether polyols with a low double-bond content.
BAYER AG +3 more
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Chlorofluorocarbons substitution in rigid polyurethane foams
2000The substitution of chlorofluorocarbons (CFC) has represented a major challenge not only for the fluid producers but also for the final users who relied on these molecules. Rigid polyurethane foams have been profoundly affected by this change. This paper will especially address the consequence of the CFC-11 substitution on the formulation itself of ...
Albouy, A., Tersac, Gilles
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Molding Rigid Polyurethane Foam
Journal of Cellular Plastics, 1972V.G. Soukup, R.C. Harper
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