7 résultat(s) recherche sur le tag ''Groupe'

Acrylic functional monomers (Part I) / V. C. Malshe in PAINTINDIA, Vol. XLV, N° 4 (04/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 4 (04/1995) . - p. 33-42 Titre : Acrylic functional monomers (Part I) Type de document : texte imprimé Auteurs : V. C. Malshe, Auteur ; Milind S. Vaidya, Auteur Année de publication : 1995 Article en page(s) : p. 33-42 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Acrylate  polymère'  Polymérisation  Monomère  'Groupe  fonctionnel' Index. décimale : 667.9 Revêtements et enduits Note de contenu : - Functional monomers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13577 [article]

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Acrylic functional monomers (Part II) / V. C. Malshe in PAINTINDIA, Vol. XLVI, N° 3 (03/1996)

[article]  inPAINTINDIA > Vol. XLVI, N° 3 (03/1996) . - p. 31-36 Titre : Acrylic functional monomers (Part II) Type de document : texte imprimé Auteurs : V. C. Malshe, Auteur ; Milind Vaidya, Auteur Année de publication : 1996 Article en page(s) : p. 31-36 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Acrylate  polymère'  Polymérisation  Monomère  'Groupe  fonctionnel' Index. décimale : 667.9 Revêtements et enduits Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13436 [article]

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Cure of secondary carbamate groups by melamine-formaldehyde resins / H. P. Higginbottom in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 894 (07/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 894 (07/1999) . - p. 49-69 Titre : Cure of secondary carbamate groups by melamine-formaldehyde resins Type de document : texte imprimé Auteurs : H. P. Higginbottom, Auteur ; G. R. Bowers, Auteur ; Patricia E. Ferrell, Auteur ; Loren W. Hill, Auteur Année de publication : 1999 Article en page(s) : p. 49-69 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Matériau  revêtement'  Peinture  Thermodurcissable  Durcissement  'Groupe  fonctionnel'  Carbamate  Réticulation  Réticulant  'Mélamine  résine'  Formaldéhyde  Aminoplaste  'Mécanisme  réaction'  Feuil  'Propriété  dynamomécanique'  'Etude  expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : Melamine-formaldehyde (MF) resins have been used as crosslinkers for hydroxyl-functional co-reactants in thermoset coatings for about 60 years. Crosslink densities of films prepared from oligomeric urethane polyols suggested that the methoxymethyl groups of MF resins could react with urethane groups (i.e., secondary carbamate groups) as well as reacting with hydroxyl groups. Co-reactants that contain secondary carbamate groups and no hydroxyl groups have been prepared with several types of backbone structures. Cure of such co-reactants by MF resins has been studied using a gradient oven with determination of impact resistance, solvent resistance, and hardness. Several formulations from these cure profile sets have been selected for crosslink density determinations by dynamic mechanical analysis (DMA). Crosslink densities of cured films are consistent with complete conversion of secondary carbamate groups at temperatures only slightly higher than those used for cure of hydroxyl groups. The -OH groups on certain acrylic polyols were converted to secondary carbamate groups. The original acrylic and the converted acrylic were both cured with MF resins. Acid resistance was much better for films prepared from the acrylic that contained secondary carbamate groups. Note de contenu : - RESULTS AND DISCUSSION : Synthesis and characterization of secondary carbamate co-reactants - Cure response of model carbamates in a gradient oven test - Dynamic mechanical analysis of films from selected co-reactants - Secondary carbamate groups on the same backbone - Effect of melamine crosslinker structure on cure of secondary carbamates - MF cure of aqueous polyurethane dispersions Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17912 [article]

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Design of pigment dispersants : methodology for selection of anchoring groups / Henk J. W. Van Den Haak in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 873 (10/1997)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 873 (10/1997) . - p. 137-142 Titre : Design of pigment dispersants : methodology for selection of anchoring groups Type de document : texte imprimé Auteurs : Henk J. W. Van Den Haak, Auteur Année de publication : 1997 Article en page(s) : p. 137-142 Note générale : Bibliogr. Langues : Américain (ame) Tags : Peinture  Adjuvant  Dispersant  'Groupe  fonctionnel'  Adsorption Index. décimale : 667.9 Revêtements et enduits Résumé : The development of pigment dispersants for waterborne or solvent-borne paint systems requires knowledge about anchoring groups, soluble tails, and about an effective and practically feasible architecture to build them together into one molecule.In this paper a method is described for the comparison of the anchoring properties of functional groups. The adsorption of model compounds to pigments from an aqueous solution is measured. From the adsorption isotherms thus obtained, the free energy of adsorption can be calculated, as well as the number of anchoring groups that can adhere to a given weight or surface area of pigment. Note de contenu : - ANCHORING : Theory of adsorption - Real vs. apparent adsorption - INFORMATION FROM THE ADSORPTION MEASUREMENTS : The adsorption capacity A - The strenght of adsorption - Co(adsorption of solvent Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18299 [article]

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Effectiveness of hydroxyfunctional chain transfer agent in acrylic resins / Amitabha Ray Chaudhuri in PAINTINDIA, Vol. LII, N° 9 (09/2002)

[article]  inPAINTINDIA > Vol. LII, N° 9 (09/2002) . - p. 51-56 Titre : Effectiveness of hydroxyfunctional chain transfer agent in acrylic resins Type de document : texte imprimé Auteurs : Amitabha Ray Chaudhuri, Auteur Année de publication : 2002 Article en page(s) : p. 51-56 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Réticulant  Feuil  'Propriété  mécanique'  physique  Réticulation  Durcissement  'Transfert  chaîne'  'Groupe  hydroxyle'  fonctionnel'  'Acrylique  dérivé  polymère'  Liant  Formulation  Peinture  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : The cross link density of a cured coating is of paramount importance for determining the ultimate performance of the coating like solvent resistance and humidity resistance. It is also the most significant factor for determination of the mechanical properties like hardness and flexibility. Recently eco-friendly norms have driven formulators towards high solid coatings which have the additional advantage of the low energy requirement. This demands a resin of low molecular weight for having a higher application solid at a sprayable viscosity. These would however create a problem for thermosetting acrylics because with decrease in molecular weight the probability of functional group(s) required for cross linking per oligomer chains is being reduced. The author of the present paper has ensured that each oligomer chain would have at least one functional group by using new chain transfer agent. The objectives were met by using chain transfer agent which itself had the functional group. A series of experiments were conducted after preparing high solid acrylic oligomers with different monomers and 2- mercapto ethanol as chain transfer agent to check for its effectiveness as molecular weight modifier and molecular weight distribution modifier. The oligomers were also evaluated in coatings with melamine resin to check the gasoline resistance property and flexibility. The author has established conclusively that it is possible to improve both the properties simultaneously using the technique discussed. Note de contenu : - RESIN SYNTHESIS - PROPERTIES AND CHARACTERIZATION OF RESINS - FORMULATION OF COATINGS - PREPARATION OF COATINGS - EVALUATION OF COATINGS - ANALYSIS OF COATING PROPERTIES Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12410 [article]

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Hydroxyl value of resins and alcohols / V. D. Sawant in PAINTINDIA, Vol. L, N° 6 (06/2000)

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Relationships of synthetic organic tanning agents / Graham Lampard in LEATHER INTERNATIONAL, Vol. 213, N° 4813 (08/2011)  

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