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Recent developments in polymer design / S. G. Yeates in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 10 (10/1996)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 79, N° 10 (10/1996) . - p. 437-440 Titre : Recent developments in polymer design Type de document : texte imprimé Auteurs : S. G. Yeates, Auteur ; S. N. Richards, Auteur Année de publication : 1996 Article en page(s) : p. 437-440 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Polymère  'Procédé  revêtement'  Polymérisation  'Masse  moléculaire'  'Polymère  vivant'  'Copolymère  greffé'  Morphologie Index. décimale : 667.9 Revêtements et enduits Résumé : Environmental legislation continues to be a major force for change within the surface coatings industry. This is motivated, both by concern for human health ( classifiction / labelling, occupational exposure limits, notifiation / testing and market restrictions / bans ), as well as the environment ( reduced emissions, VOC controls, waste minimisation ). There is, therefore, a move towards cleaner technologies which take a holistic view of the whole coatings process. Products are becoming ever more complex in order to provide comparable, or superior, in-use performance, coupled with enhanced environmental characteristics. It is possible to identify aspects at all points in the coating life-cycle from raw materials suply, manufacture, use and disposal. This paper discusses some of these newer possibilities in terms of emerging polymerisation processes, and highlights possibilities for the design of environmentally-compliant coatings especially in the move to lower VOC content materials. In solvent-borne technology there is a move, both to higher solids, as well as towards the use of more benign solvents. In water-borne coatings we can see the need for greater control of macroscopic structure ( core-shell ) for improved film formation and balance of properties, as well as the trend towards co-solvent removal. In solvent-free materials ( ie thermoset powder ) there is the move to lower temperature stoving coupled with a desire to exploit further acrylic technology. Note de contenu : - CONTROLLED POLYMERISATION : Molecular weight control - Chain structure - Living polymerisation - Graft copolymers using CCTP - Dendrimers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17114 [article]

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Water-soluble melamine-Formaldehyde resins / C. Fisher in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 10 (10/1996)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 79, N° 10 (10/1996) . - p. 442-448 Titre : Water-soluble melamine-Formaldehyde resins Type de document : texte imprimé Auteurs : C. Fisher, Auteur ; D. S. Pearson, Auteur ; I. Whyley, Auteur Année de publication : 1996 Article en page(s) : p. 442-448 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  eau'  'Solution  aqueuse'  Liant  Aminoplaste  'Mélamine  résine'  Préparation  Solubilité  'Relation  structure  propriété' Index. décimale : 667.9 Revêtements et enduits Résumé : A major challenge confronting those who select waterborne technology as a route to Volatile Organic Content (VOC) compliant coatings is the need to reduce concentrations of organic co-solvents. This inevitably increases the constraints on the formulator due to the limited choice of suitable raw materials and the increased sensitivity of the systems in terms of compatibility, rheology and other application properties. Melamine-formaldehyde (MF) resins in general are well established as crosslinking agents for hydroxylated film-forming polymers and exhibit a good balance between cost and performance. Also, MF resins can be formulated to be completely water-soluble, whilst retaining good compatibility with organic polymers. This ability to provide effective crosslinking agents which are completely free from organic solvents, stabilisers or emulsifiers can go some way towards easing the constraints on new water-borne formulations. The object of this work was to investigate the design of water soluble MF resins in order to optimise their performance in aqueous systems. Note de contenu : - EXPERIMENTAL : Resin characterisation - Film performance - RESULTS AND DISCUSSION : Expected influences on water solubility - Reactions with formaldehyde - Condensation reactions - Etherification - Designing resins for water solubility - Quantifying the relationship between structure and water solubility - Film performance properties - Compatibility - Acetone rubs test Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17115 [article]

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Super durable carboxylic polyester resins / E. Belder in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 10 (10/1996)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 79, N° 10 (10/1996) . - p. 449-454 Titre : Super durable carboxylic polyester resins Type de document : texte imprimé Auteurs : E. Belder, Auteur ; F. Koldijk, Auteur Année de publication : 1996 Article en page(s) : p. 449-454 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  poudre'  Liant  'Ester  polymère'  'Résistance  intempérie'  'Dégradation  photochimique'  Feuil  'Essai  vieillissement  naturel'  accéléré'  'Propriété  mécanique' Index. décimale : 667.9 Revêtements et enduits Résumé : Since their introduction in the early 60's, powder coatings have increased continuously their share of the market for surface coating materials. This growth is the result, both of their excellent film properties, energy savings as well as environmental and economic benefits. The market in Western Europe for thermosetting powders in 1989 was 118.00 tonnes, for 1994 177.00 tonnes and for 1999 the forecast is for 230.00 tonnes giving an average growth rate over the period 1989-1994 of 8.3%. Note de contenu : - Weatherability - Photo-oxidation - Hydrolysis - Thermal degradation - Quality standards - Testing of weatherability - Accelerated indoor tests - Super durable coarboxylic polyesters - Weathering results - Mechanical properties Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17125 [article]

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Amino resins - the way ahead / R. McD. Barrett in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 10 (10/1996)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 79, N° 10 (10/1996) . - p. 455-458 Titre : Amino resins - the way ahead Type de document : texte imprimé Auteurs : R. McD. Barrett, Auteur Année de publication : 1996 Article en page(s) : p. 455-458 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture  Liant  Aminoplaste  'Mélamine  résine' Index. décimale : 667.9 Revêtements et enduits Résumé : Amino resins have made an important contribution to the technology and performance of industrial stoving paints during the last 60 years. This success has resulted from the versatility of their chemistry, which has enabled products to be adapted to meet the increasing demands imposed on modern paints. These demands include automated application, film appearance, film performance, cost effectiveness and more recently, environmental pressures. Note de contenu : - Development of amino resins - Butylated amino resins - Methylated melamine resins - Current trend in surface coatings - Overall environmental impact of amino resins Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17126 [article]

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