Aller sur edunet
Accueil
PUR : Changing the paradigm / Oleochemical polyols / Focus on the yellowing of waterborne coatings / Coating additives : Stabilizers in-can preservation of emulsion paints |
Dépouillements
Ajouter le résultat dans votre panierChanging the paradigm of polyurethane in coatings / Michael Gribble in EUROPEAN COATINGS JOURNAL (ECJ), N° 3/00 (03/2000)
Titre : Changing the paradigm of polyurethane in coatings Type de document : texte imprimé Auteurs : Michael Gribble, Auteur ; Raj L. Sood, Auteur Année de publication : 2000 Article en page(s) : p. 16-25 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane polymers in coating applications are well known for providing outstanding properties such as adhesion, corrosion resistance and weatherability among others, generally at a premium cost. New developments will be reviewed which adress performance, environmental and cost issues related to polyurethane based systems in an attempt to increase the viability and market penetration versus alternative technology. These new developments include "Vorastar" polymers, cost competitive weatherable systems and water based dispersions. Finally, it will be demonstrated that polyurethane dispersions can be used successfully, where excellent performance justifies the comparatively high costs. Note de contenu : - Stage gate process helps to evaluate the value contribution
- Novel aliphatic isocyanate for improved weatherability
- For star shaped polymers typical polyurethane raw materials can be used
- Desired properties of textiles are often through post treatments
- Polyurethane dispersions are used where excellent performance is required
- Polyurethane dispersions for carpet back coating applications expannd the competition
- Bright outlook for polyurethane developmentsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10977
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3/00 (03/2000) . - p. 16-25[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 000613 - Périodique Bibliothèque principale Documentaires Disponible 000614 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Oleochemical polyols Titre original : New raw materials for polyurethane applications Type de document : texte imprimé Auteurs : Rainer Höfer, Auteur Année de publication : 2000 Article en page(s) : p. 26-37 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : In order to use natural oils as raw materials for polyurethane production, multiple hydroxyl functionality is required, Hydroxyl functionality naturally occurs in castor oil and can be introduced synthetically In other natural oils with saturated sites by epoxidation followed by ring opening. This can be accomplished by reaction with alcohols, amino alcohols or acids. The main fields of application of these novel oleochemical polyols are areas, where hydrophobicity, hardness, flexibility and mechanical and chemical resistance are needed. Usage of oleochemical polyols in VOC-free, two component polyurethane coatings and floorings, as well as in thermoplastic polyurethanes which are described In the text provides an overview of the broad range of applications which are accessible at present. Note de contenu : 1 How are oleochemical polyols being synthesised ?
1.1. Drying oils - reactions at the double bonds of unsaturated fatty acids - Hydroxyl functional natural oils - Hydroxyl functional fatty acid derivatives - ester linkages should be avoided
1.2 Different types of reactions lead to dicarboxylic acids
1.3 Hydrogenation leads to saturated and unsaturated fatty alcohols
1.4 Dimerdiol oligomers with improved chemical stability
2 Usage of oleochemical polyols :
2.1 Solvent-free two-pack PUR systems can be used for different substrates
2.2 Thermoplastic polyurethanes (TPU) are hydrophobic materials
2.3 Aqueous polyurethane dispersions show excellent abrasion resistance
2.4 PUR high solids
3. A wide range of applications is accessiblePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10982
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3/00 (03/2000) . - p. 26-37[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 000613 - Périodique Bibliothèque principale Documentaires Disponible 000614 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Light on the yellowing of waterborne coatings Type de document : texte imprimé Auteurs : Oliver Wagner, Auteur ; Gops Pillay, Auteur Année de publication : 2000 Article en page(s) : p. 42-51 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : This paper examines the various accelerated tests for weathering of waterbased coatings and compare them to natural weathering data. It is also the attempt to shed some light on the concept of yellowing of waterbased coatings and address whether there is a substantial difference between straight- and styrene-acrylate based coatings. The evidence to support the popular believe that coatings based on styrene-acrylate dispersions have a tendency to yellow more than that of coatings based on straight acrylic dispersions is inconclusive. Note de contenu : - Colorimetric reading and paint yellowing
- Minimum acceptable colorimetric reading for non-yellowing
- Accelerated test methods and exterior durability
- Difference between straight- and styrene-acrylates in yellowing of paints
- Results at a glancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10983
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3/00 (03/2000) . - p. 42-51[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 000613 - Périodique Bibliothèque principale Documentaires Disponible 000614 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Technology wrap-up, Part I - Polyurethane systems : Isocyanate and urethane groups, polyurethanes Type de document : texte imprimé Auteurs : Thomas Brock, Auteur ; Michael Groteklaes, Auteur ; Peter Mischke, Auteur Année de publication : 2000 Article en page(s) : p. 52-55 Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Note de contenu : - Reactions of the isocyanate group
- Classification of polyurethane coating systems
- Key isocyanates used in coating chemistry
- Further information about the most important one-component polyurethane systems
- Two-component polyurethane systemsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10984
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3/00 (03/2000) . - p. 52-55[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 000613 - Périodique Bibliothèque principale Documentaires Disponible 000614 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Stabilizers Titre original : Coating additives, part XIII Type de document : texte imprimé Auteurs : Vladimir V. Verkholantsev, Auteur Année de publication : 2000 Article en page(s) : p. 58-63 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Coating material' Paint Adjuvant 'Stabilizer agent' 'Light stabiliser' Antioxidant 'Heat stabilizer' Index. décimale : 667.9 Revêtements et enduits Résumé : Stabilizing additives protect organic coatings against various forms of degradation and destruction of service properties under the action of sunlight, atmosphere oxygen, moisture, elevated and alternated temperatures, microorganisms and other service conditions. In the narrow sense, UV-absorbers, UV-stabilizers and anti-oxidants, preventing light, oxygen and heat degradation of binder resins, are described as stabilizing additives. In a broader sense, however, a number of other groups of coating additives are in fact coating stabilizers, such as bio-preservatives, corrosion inhibitors, adhesion promoters, some surface conditioners etc. Note de contenu : - Coating stabilization
- Coating serviceability and life span
- Stabilizing additives : general features and functions
- Heat destruction and stabilization
- Structural stabilizers
- Oxidative destruction and stabilization
- Anti-oxidants
- Sunlight caused degradation and coating stabilization
- UV-absorbers and light stabilizersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10985
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3/00 (03/2000) . - p. 58-63[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 000613 - Périodique Bibliothèque principale Documentaires Disponible 000614 - Périodique Bibliothèque principale Documentaires Disponible
Titre : In-can preservation of emulsion paints Type de document : texte imprimé Auteurs : Jenny Lunenburg - Duindam, Auteur ; Wolfgang Lindner, Auteur Année de publication : 2000 Article en page(s) : p. 66-73 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : A microbiological test method for evaluation of the wet-state resistance of water based paints to bacteria has been developed. In a series of collaborative tests starting in 1978 many aspects of in-can-preservation were investigated. These have culminated in a round robin test (phase VII) designed to compare the precision of viable count and streak plate methods as a means of determining bacterial populations in well-preserved, unpreserved and so-called border line preserved paints. Reproducibility and repeatablity of both methods are reported. The streak plate method was found to be adequate to recover surviving or growing bacteria from the challenged paint samples. Good correlations of the streak results to log viable counts were found. Note de contenu : 1.IBRG Challenge Test
- Test parameters and the matrix effects are normaly too complex to be easily standardised
- A blank sample must be included into every test
- The incubation time should be sufficient to allow molecules to express their activity
- Real conditions are when only some batches of an inadequately preserved paint are spoiled by bacteria on storage : Participants of the test phase VII - Micro-organisms - Test Procedure - Test Paint - Sample Pre-treatment - Challenge - Recovery Methods - Evaluation - Ratings -
- 2. Results and Discussions : Inoculum - Viable Count Technique - Streak Plate Method - Total viable counts and streak plate results are comparablePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10986
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3/00 (03/2000) . - p. 66-73[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 000613 - Périodique Bibliothèque principale Documentaires Disponible 000614 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Important isocyanates for coatings : An introduction into polyurethane chemistry and technology Type de document : texte imprimé Auteurs : Peter Mischke, Auteur Année de publication : 2000 Article en page(s) : p. 81-83 Langues : Anglais (eng) Catégories : Isocyanates
Polyuréthanes
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Note de contenu : - Fig. 1 : Important di and polyisocyanates used in coatings chemistry
- Fig. 2 : Deblocking of isocyanates blocked ε-caprolactam
- Fig. 3 : Cleavage of polyurethanes by means of a catalystPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33514
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3/00 (03/2000) . - p. 81-83[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 000613 - Périodique Bibliothèque principale Documentaires Disponible 000614 - Périodique Bibliothèque principale Documentaires Disponible
Exemplaires (2)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 000613 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
| 000614 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
