19 résultat(s) recherche sur le tag 'Uréthanne'

Analytical investigations on acrylic polyurethane hybrid - dispersions / H. Kagerer in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 927 (04/2002)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 927 (04/2002) . - p. 63-67 Titre : Analytical investigations on acrylic polyurethane hybrid - dispersions Type de document : texte imprimé Auteurs : H. Kagerer, Auteur ; H. U. Moritz, Auteur ; H. P. Rink, Auteur ; W. A. Jung, Auteur Année de publication : 2002 Article en page(s) : p. 63-67 Note générale : Bibliogr. Langues : Américain (ame) Tags : Etude  expérimentale  Analyse  chimique  Liaison  double  Copolymérisation  radicalaire  Matériau  hybride  Copolymère  greffé  Uréthanne  copolymère  Acrylate  Dispersion  aqueuse  Peinture  eau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : Water-dispersible polyurethane acrylic graft copolymers are an important class of hybrid polymers for use as resins in waterborne coatings. In order to study fundamental properties of such polymers, a model system of four polyurethane macromonomers that differ in the average number of double bonds per molecule was developed. Free radical copolymerization of the polyurethane macromonomers with acrylates was carried out in aqueous phase using the polyurethanes as the reactive emulsifier. The stability of the product dispersions depends on the average number of double bonds per macromolecule and the weight ratio of hydrophilic polyurethane to the acrylic part. The content of the polyurethane double bonds and their conversion was measured by nuclear magnetic resonance (NMR) spectroscopy and by a titrimetrical method. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5669 [article]

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001238	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Cycloaliphatic polyester based high solids polyurethane coatings / Hai Ni in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 928 (05/2002)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 928 (05/2002) . - p. 49-56 Titre : Cycloaliphatic polyester based high solids polyurethane coatings : I. The effect of difunctional alcohols Type de document : texte imprimé Auteurs : Hai Ni, Auteur ; Jeremy L. Daum, Auteur ; Mark D. Soucek, Auteur ; William J. Simonsick, Auteur Année de publication : 2002 Article en page(s) : p. 49-56 Note générale : Bibliogr. Langues : Américain (ame) Tags : Etude  expérimentale  Viscoélasticité  Propriété  rhéologique  Résistance  traction  Ténacité  mécanique  Feuil  Préparation  Ester  polymère  Formulation  Uréthanne  Liant  Peinture  haute  teneur  solide  Matériau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : High-solids polyesters were synthesized with two cycloaliphatic diacids, 1,4-cyclohexanedicarboxylic acid (1,4- HDA) and 1,3-cyclohexanedicarboxylic acid (1,3-CHDA), and with five diols, 1,4-cyclohexanedimethanol (CHDM), neopentyl glycol (NPG), hydroxypivalyl hydroxypivalate (HPHP), 2-butyl-2-ethyl-1,3-propanediol (BEPD), and 1,6-hexanediol (HD). The viscosity of the polyesters was dependent on the structures of diols. The viscosity of polyesters is lower with the diol HD, intermediate with BEPD and HPHP, and higher with the diols CHDM and NPG. The polyesters were crosslinked with hexamethylene diisocyanate isocyanurate (HDI isocyanurate) affording polyurethane coatings. The mechanical properties, tensile properties, fracture toughness, and viscoelastic properties were investigated for the polyurethane films with five different diols. The cyclohexyl structure of the CHDM provides the polyurethane with rigidity which is manifested in high tensile modulus, hardness, and fracture toughness. In contrast, the linear diol, 1,6-hexanediol provides polyurethane with very high flexibility, but these coatings suffer with respect to low hardness and tensile modulus. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5649 [article]

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001239	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Effect of carbon black on adhesion to plastics in solventborne 2K polyurethanes / Kalpana S. Katti in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 903 (04/2000)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 903 (04/2000) . - p. 35-44 Titre : Effect of carbon black on adhesion to plastics in solventborne 2K polyurethanes Type de document : texte imprimé Auteurs : Kalpana S. Katti, Auteur ; Marek W. Urban, Auteur Année de publication : 2000 Article en page(s) : p. 35-44 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau  revêtement  Peinture  Uréthanne  polymère  Pigment  minéral  Noir  carbone  Concentration  pigmentaire  volumique  Réticulation  Adhérence  Matière  plastique  ABS  Etude  expérimentale Index. décimale : 667.9 Revêtements et enduits Résumé : These studies show that when the pigment volume content (PVC) of carbon black particles increases in polyurethanes (PUR), NCO consumption increases, and the extent of H-bonded C=O species near the film-substrate (F-S) interface is enhanced. During crosslinking, polyurea (PUA) is produced, and its concentration levels near the F-S interface are diminished for unpigmented coatings, whereas for the same system containing carbon black, the PUA formation is enhanced. Although the presence of carbon black particles at the F-S interface results in diminished adhesion of 2K PUR to acrylonitrile-butadiene-styrene (ABS), adhesion is also affected by the presence of OH and C=O functionalities on ABS, which are potential sites for H- bonding to PUR. Stronger hydrogen donor affinity of N-H functionalities in PUA as compared to the N-H groups on PUR leads to increased H-bonding in the presence of carbon black. Enhanced intermolecular H-bonding in PUR due to the presence of carbon black particles competes with the F-S interfacial H-bonding that promotes adhesion. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5815 [article]

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001208	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Effect of particle size distribution on the performance of two-component water-reducible acrylic polyurethane coatings using tertiary polyisocyanate crosslinkers / Denise E. Fiori in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 902 (03/2000)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 902 (03/2000) . - p. 63-69 Titre : Effect of particle size distribution on the performance of two-component water-reducible acrylic polyurethane coatings using tertiary polyisocyanate crosslinkers Type de document : texte imprimé Auteurs : Denise E. Fiori, Auteur ; David Ley, Auteur ; Richard J. Quinn, Auteur Année de publication : 2000 Article en page(s) : p. 63-69 Note générale : Bibliogr. Langues : Américain (ame) Tags : Peinture  eau  deux  constituants  Uréthanne  polymère  Acrylique  dérivé  Distribution  dimension  particule  Durcissement  Réticulant  Isocyanate  Propriété  physique  mécanique  Feuil  Etude  expérimentale Index. décimale : 667.9 Revêtements et enduits Résumé : A two-component waterborne polyurethane system with a 250 g/l VOC has been formulated to meet the performance requirements of the automotive refinish market. This paper discussed an experimental study to develop a two-component water-reducible polyurethane coating using a tertiary aliphatic polyisocyanete crosslinker with dry times, appearance, and reactivity equivalent to a two-component solventborne system. The effects of acrylic polyol monomer composition, glass transition temperature (Tg), and hydroxyl concentration on drytime and ambient cure film performance have been determined. The effects of particle size distribution of the formulated coating on performance were examined. It was found that smaller particle size provides overall improved film propertics, i.e., jaster dry time, increased hardness, and faster development of solvent resistance. The relationship of both acrylic polyol composition and formulation variables on the particle size distribution are discussed. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5823 [article]

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Effects of model coal tar components on adhesion strength of polyurethane coating on steel plate / Naoki Yokoyama in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 6 (04/2005)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 6 (04/2005) . - p. 445-451 Titre : Effects of model coal tar components on adhesion strength of polyurethane coating on steel plate Type de document : texte imprimé Auteurs : Naoki Yokoyama, Auteur ; Kenichi Fujino, Auteur Année de publication : 2005 Article en page(s) : p. 445-451 Note générale : Bibliogr. Langues : Américain (ame) Tags : Propriété  surface  rhéologique  mécanique  Etude  expérimentale  Corrosion  sel  Résistance  corrosion  dynamomécanique  traction  Adhésivité  Composé  aromatique  polycyclique  Goudron  houille  Additif  anticorrosion  Relation  formulation  propriété  Acier  Couche  protectrice  Uréthanne  polymère  Matériau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : In order to study the effects of coal tar components on the adhesion strength of a heavy duty anticorrosive coating formed with tar-urethane resin on a steel plate, polyurethane coatings that were compounded with 15 kinds of polycyclic aromatic compounds as model coal tar components were prepared. In the model coal tar components, naphthalene, quinoline, 2-naphthol, and phenanthrene showed good compatibility with polyurethane. To test their heavy duty anticorrosive properties, tensile adhesion strength of the cured coatings prepared with the compatible model coal tar components was measured, and the change in tensile adhesion strength as a function of time during salt-water spray treatment was measured. We found that the systems compounded with naphthalene, 2-naphthol, and phenanthrene showed good properties in an ordinary state for adhesion strength. However, only the system with 2-naphthol was found to have good properties in the change of tensile adhesion strength as a function of time during salt-water spray treatment. The curing time of the system with 2-naphthol was slower than that of the others, i.e., we found an inverse proportion between curing speed and adhesion durability. We also measured the dynamic viscoelasticity of cured coatings. We found that a tan delta curve of the system with 2-naphthol shifted towards a low temperature side and the tan delta at the temperature at which adhesion strength was measured was larger than that of the others. We hypothesized that the reason for the tan delta shift was a result of the decrease in crosslinking density because 2-naphthol partially capped the isocyanate group. Considering these results, we hypothesized that one of the reasons why the adhesion properties of the system with 2-naphthol had improved was due to the increase of tan delta. DOI : 10.1007/BF02733887 En ligne : https://link.springer.com/content/pdf/10.1007%2FBF02733887.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3839 [article]

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Elucidation of polyurethane dispersions in a batch rotor-stator mixer / Supathorn Phongikaroon in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 4 (10/2004)  

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Isocyanate - free moisture cure coatings / Jamil A. Baghdachi in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 932 (09/2002)

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Long-term weathering behavior of UV-curable clearcoats : Depth profiling of photooxidation, UVA, and HALS distributions / Christopher M. Seubert in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 7 (07/2005)  

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Mechanical property changes and degradation during accelerated weathering of polyester-urethane coatings / allen Skaja in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)  

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Oil modified and waterborne polyurethane resin / G. Gündüz in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 931 (08/2002)

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Organic oligomers in aqueous environments / J. David Nordstrom in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 2 (04/2004)  

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Preparation of modified polyesters containing triphosphorous and their applications to PU flame-retardant coatings / Hong-Soo Park in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)  

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Quantitative spectroscopy to determine the effects of photodegradation on a model polyester - urethane coating / S. G. Scroll in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 945 (10/2003)

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A selective catalyst for two-component waterborne polyurethane coatings / Z. Alex He in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 930 (07/2002)

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Study of film properties of some urethane oils / F. Seniha Güner in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 929 (06/2002)

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Surface rearrangement of tailored polyurethane-based coatings / Mariëlle Wouters in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 6 (04/2005)  

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Thermal and mechanical properties of UV - cured acrylated hyperbranched polyester and its blends with linear polyurethane acrylate / Wei Huanyu in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 939 (04/2003)

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Use of laser scanning confocal microscopy for characterizing changes in film thickness and local surface morphology of UV-exposed polymer coatings / Li-Piin Sung in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 4 (10/2004)  

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UV curing of aqueous polyurethane acrylate dispersions. A comparative study by real-time FTIR spectroscopy and pilot scale curing / Armin Tauber in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 911 (12/2000)

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