Polyurethane Articles / Technical Publications

No one wants their bed, couch, chair, computer, or TV to catch on fire. "If an ordinary upholstered chair in your home gets ignited, it can essentially take your whole house down," says Richard Gann, a senior research scientist at the U.S. National Institute of Standards and ...

Published on: May 09, 2008
Categories: Raw Materials : Flame Retardants
Company: Environmental Health Perspectives

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Water Blown Soy Polyol-Based Polyurethane Foams of Different Rigidities
	In this report, attempts have been made to study the influence of various factors like level of catalyst system and blowing agent, and functionality and viscosity of polyols, on the structures of various soy polyol-based polyurethane foams. Efforts are made to correlate the ... Published on: May 03, 2008 Categories: Foams Company: Faculty of Forestry University of Toronto

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Bookbinding Adhesives
	Every day, we come into contact with one of the most demanding adhesive applications: books. Adhesives are used in the manufacture of books principally for the binding, but they are also used to make hardcover book covers. Bookbinding demands sophisticated adhesive solutions ... Published on: May 02, 2008 Categories: Adhesives Company: SpecialChem

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Influence of ingredients in water-based polyurethane-acrylic hybrid latexes on latex properties
	Polyurethane–acrylic (PU–AC) hybrid latexes were prepared. Main monomers for PU preparation were isophorone diisocyanate, DMPA (dimethylol propanic acid) and polypropylene oxides (PPO) of different molecular weights. Acrylic monomers included butyl acrylate, methyl methacrylate ... Published on: May 02, 2008 Categories: Latexes Company: University of Jinan

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Study on microstructure of UV-curable polyurethane acrylate films
	UV-curable polyurethane acrylates (UVPUA) were prepared, and Fourier transform infrared (FTIR) was used to monitor the synthesis process and cured films. Effects of soft segment length, isocyanate type, reactive diluent type and level, quenching, annealing and different UV-cured ... Published on: May 02, 2008 Categories: Films Company: South China University of Technology

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UV curable polyurethane dispersions from polyisocyanate and organosilane
	UV curable polyurethane dispersions (UV-PUDs) have been synthesized from hexane diisocyanate (HDI) trimer and polytetramethylene ether glycol (PTMG) with different types of capping agents (2-hydroxyethylacrylate (HEA), pentaerythritol triacrylate (PETA), aminopropyl triethoxy ... Published on: May 02, 2008 Categories: Dispersions Company: Pusan National University

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Carbon nanotube-enhanced polyurethane scaffolds fabricated by thermally induced phase separation
	Nanocomposite foams are an attractive prospect in a number of fields including biomedical science, catalysis and filtration. In biomedical engineering, porous nanocomposite scaffolds can potentially mimic aspects of the nanoscale architecture of the extra-cellular matrix, as ... Published on: May 02, 2008 Categories: Nanocomposites Company: Royal Society of Chemistry

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Preparation of Conductive Polypyrrole/Polyurethane Composite Foams by In situ Polymerization of Pyrrole
Conductive composite foams were prepared by exposing iodine-loaded polyurethane (PU) foams to pyrrole vapor. The kinetics, equilibrium, and mechanism of the in situ polymerization of pyrrole by iodine within a PU foam was investigated. The dopant for the polypyrrole (PPy) was ... Published on: May 01, 2008 Categories: Foams Company: University of Connecticut

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Stabilized Micelles of Amphoteric Polyurethane Formed by Thermoresponsive Micellization in HCl Aqueous Solution
The thermoresponsive micellization behavior of amphoteric polyurethane (APU) was studied in HCl aqueous solution (pH 2.0) through light scattering, transmission electron microscopy, and fluorescent measurement. When APU concentration is high enough, nonreversible assembly of ... Published on: May 01, 2008 Categories: Chemistry Company: Tianjin University

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Complex Macromolecular Architectures Based on n-Hexyl Isocyanate and ε-Caprolactone Using Titanium-Mediated Coordination Polymerization
Well-defined diblock copolymers {PS-b-P(ε-CL)} and triblock terpolymers {PS-b-PI-b-P(ε-CL), PI-b-PS-b-P(ε-CL)} of polystyrene, PS, poly(ε-caprolactone), P(ε-CL), and polyisoprene, PI, were synthesized using CpTiCl2(OP) (P = PS, PS-b-PI, or PI-b-PS) as ... Published on: May 01, 2008 Categories: Chemistry Company: University of Athens

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New Coating Technology Expands Color Choices for Vinyl Building Products
	Since the mid-1990s, composite materials have made substantial inroads across the building products industry in the manufacture of windows, doors, trim and siding. The unprecedented strength and resilience of these materials, and their low maintenance, has made them too good ... Published on: May 01, 2008 Categories: Coatings Company: The Sherwin-Williams Company

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Effect of sequence concentrations on segmented polyurethanes properties
To evaluate in the first stage, the efficiency of changing the nature and the length of diols on the properties of perfectly hard sequences polyurethanes (PU). In the second, the thermal properties of a new series of segmented PU with different concentrations of soft sequences ... Published on: Apr 30, 2008 Categories: Elastomers Company: -

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Novel amphiphilic polyester-urethanes based on polyR-3-hydroxyalkanoate: synthesis, biocompatibility and aggregation in aqueous solution
The aim of this work was to develop polyhydroxyalkanoates (PHAs) for blood contact applications, and to study their self-assembly behavior in aqueous solution when the PHAs are incorporated with hydrophilic segments. To do this, poly(ester-urethane) (PU) multiblock copolymers ... Published on: Apr 30, 2008 Categories: Chemistry Company: Shantou University

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Chemoenzymatic Synthesis and Chemical Recycling of Sustainable Polyurethanes
Two novel types of chemically recyclable ester-containing polyurethanes, namely, a diol-diacid-type poly(diester-urethane) (PDEU) and a hydroxy acid type poly(ester-urethane) (PEU), were prepared by a green synthetic route that avoids the use of hazardous diisocyanate. The ... Published on: Apr 30, 2008 Categories: Chemistry Company: Keio University

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Fluidized bed sintering with polyurethane powder coatings
Paper entitled “Fluidized Bed Sintering with Novel Low Temperature Curable Polyurethane Powder Coatings” by Dr Emmanouil Spyrou of Evonik Degussa GmbH, presented at European Coatings Conference “Polyurethanes for High Performance Coatings V” in Berlin, Germany, 14-15 Feb 2008. ... Published on: Apr 30, 2008 Categories: Powder Coatings Company: Evonik Degussa

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In vitro biostability evaluation of polyurethane composites in acidic, basic, oxidative, and neutral solutions

New and improved properties can often be achieved by compounding two or more different but compatible materials. But, can failure possibility also be increased by such a compounding strategy? In this article, we compared the in vitro biostability of composites with that of the ...

Published on: Apr 30, 2008
Categories: Composites
Company: Medtronic Corporate Science and Technology

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Synthesis and properties of waterborne polyurethane hydrogels for wound healing dressings
To accomplish ideal wound healing dressing, a series of waterborne polyurethane (WBPU) hydrogels based on polyethylene glycol (PEG) were synthesized by polyaddition reaction in an emulsion system. The stable WBPU hydrogels which have remaining weight of above 85% were obtained. ... Published on: Apr 30, 2008 Categories: Hydrogels Company: Pusan National University

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On the different roles of isocyanate and cyanide species in propene-SCR over silver/alumina
Silver/alumina is one of the most promising catalyst materials for HC-SCR. The reaction mechanism remains incompletely understood, however. Isocyanate species (NCO) and cyanide species (CN), important intermediates in the reaction path in HC-SCR, were investigated by gas-phase ... Published on: Apr 30, 2008 Categories: Chemistry Company: Chalmers University of Technology

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