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Titre : Biobased polyol with self-crosslinking functionality Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 30-33 Langues : Américain (ame) Catégories : Auto-réticulation
Composés organiques -- Synthèse
Copolymère diacétone acrylamide
Isocyanates
Polymères -- Synthèse
Polymères en émulsion
Polyols
Polyuréthanes
Réactivité (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : The need for green and environmentally safe coatings creates an opportunity for biobased raw materials. Vegetable oil polyols (VOPs) are the major source of biobased raw materials for making polyurethanes.
Despite their wide commercial availability, they have not been utilized for making water-based polyurethane (PU) coatings, because, VOPs have no performance-enhancing functional group in the molecular architecture. Therefore, they are unable to meet the stringent corrosion-, UV-, and solvent-resistance performance requirements.
In this short communication, we present a new class of biobased polyol with a crosslinking functional group that is free from toxic chemicals and has superior performance. This is achieved by reacting a keto acid with a glycidyl functional fluids derived from biobased sources. We also present the utilization of the polyol in making water-based polyurethane dispersion (PUD).Note de contenu : - Synthesis of the polyol
- Properties of the polyol
- Reactivity of the polyol towards isocyanates
- Application of the polyol in making self-crosslikable water-based polyurethane dispersion
- Scheme 1 : Synthesis of 2,3-dihydroxypropyl levulinate (Levupol-G)
- Scheme 2 : Synthesis of Levupol-S from levulinc acid and epoxidized soybean oil
- Table 1 : Physical properties of Levupol-G and Levupol-S
- Table 2 : Properties of PUD derived from Levupol-G
- Figure : Chemical structure of diacetone acrylamideEn ligne : https://drive.google.com/file/d/1fGBbUe12_u91fZXjDBS5ubrhJUckQdfH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37169
in COATINGS TECH > Vol. 19, N° 1 (01/2022) . - p. 30-33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23290 - Périodique Bibliothèque principale Documentaires Disponible High performance coating films cured by novel penetrating method : Anionic resin paints / Yasuharu Nakayama in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 870 (07/1997)
[article]
Titre : High performance coating films cured by novel penetrating method : Anionic resin paints Type de document : texte imprimé Auteurs : Yasuharu Nakayama, Auteur Année de publication : 1997 Article en page(s) : p. 61-69 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbohydrazide Le carbohydrazide est utilisé comme absorbeur d'oxygène dans le traitement de l'eau pour les chaudières. C'est une alternative à la dangereuse et potentiellement cancérigène hydrazine . Carbohydrazide réagit avec l'oxygène pour faire l'eau , l'azote et l'urée . Il passive aussi des métaux et réduit les oxydes métalliques ( oxyde de fer -> l'oxyde ferreux , l'oxyde de cuivre -> l'oxyde cuivreux ).
Il est largement utilisé dans la production de médicaments, herbicides, régulateurs de croissance des plantes, et des colorants.
Propriétés physiques : Le carbohydrazide est un solide cristallin blanc avec un point d'153-154 de fusion ° C. Il se décompose lors de la fusion. Il est très soluble dans l'eau et en grande partie insoluble dans les solvants organiques.
Copolymère diacétone acrylamide
Couches minces
Pénétration (physique)
Résistance à l'humidité
Réticulants
Solutions aqueuses (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : This study deals with a method of curing paint film at ambient temperature with a film-penetrative crosslinker. The method is based on the phenomenon that, after a wet coating film becomes thermoplastic, it is dipped in an aqueous solution of crosslinker. The crosslinker then penetrates into the film, and the film can be cured with the passage of dipping time. Herein an anionic copolymer containing diacetone acrylamide was employed as the main resin and carbohydrazide as the film-penetrative crosslinker. Cured films can be prepared with a short dipping time using this method. Excellent films were obtained when they were dipped in a suitable crosslinkers solution containing the proper organic solvents (accelerator of penetration rate) and an appropriate acid (promoter of the reaction). In particular, the adhesion after the water resistance test was excellent compared with that of the coating film obtained by the two-component coating method. Note de contenu : - Curing by the penetrating method
- Properties of coating film cured by penetrating methodPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18263
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 870 (07/1997) . - p. 61-69[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003539 - Périodique Bibliothèque principale Documentaires Disponible High performance coatings based on novel penetrative curing : Cationic electrodeposition coatings cured at ambient temperature / Yasuharu Nakayama in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 875 (12/1997)
[article]
Titre : High performance coatings based on novel penetrative curing : Cationic electrodeposition coatings cured at ambient temperature Type de document : texte imprimé Auteurs : Yasuharu Nakayama, Auteur Année de publication : 1997 Article en page(s) : p. 33- 39 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Copolymère diacétone acrylamide
Electrophorèse
Essai Wolff-Wilborn
Résistance à l'humidité
Résistance au chocs
Résistance chimique
Réticulation (polymérisation)
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Solutions aqueuses (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : Cationic electrodeposition coatings were cured with a penetrative crosslinker at ambient temperature. This method is based on a novel technology in which coating films are dipped in aqueous crosslinker solution which moves into the film, accompanied by crosslinking. Pencil hardness, impact strength, solvent resistance and water resistance were improved with dipping time, that is, with the penetration of crosslinking. On the contrary, corrosion resistance was controlled by two opposing factors arising from the crosslinking-strengthening of the coating barrier property and weakening of the adhesion force. Excellent protective coatings were obtained by selection of resins and control of crosslinking. This system is well suited for the coatings on huge, complex structures in finished condition incorporated with glass, plastic, etc. Note de contenu : - EXPERIMENTAL : Preparation - Methods of measurement
- RESULTS AND DISCUSSION : Characteristics of this method - New model for protective coatingsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18067
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 875 (12/1997) . - p. 33- 39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003544 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of ambient-temperature self-crosslinkable water-soluble acrylic resin for PE film ink / Pi-Hui Pi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)
[article]
Titre : Preparation and characterization of ambient-temperature self-crosslinkable water-soluble acrylic resin for PE film ink Type de document : texte imprimé Auteurs : Pi-Hui Pi, Auteur ; Xi Chen, Auteur ; Wen Xiufang, Auteur ; Shouping Xu, Auteur ; Jiang Chen, Auteur Année de publication : 2016 Article en page(s) : p. 73-80 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Adipique dihydrazide, AcideL'acide dihydrazide adipique (ADH) est un produit chimique utilisé pour la réticulation à l'eau des émulsions . Il peut également être utilisé en tant que durcisseur pour certains résines époxydes. L'ADH est une molécule symétrique avec un squelette C4 et le groupe réactif est C = ONHNH 2. Les dihydrazides sont fabriqués par la réaction d'un acide organique avec de l'hydrazine . Il existe d'autres dihydrazides avec différents squelettes, également fréquents, y compris isophtalique dihydrazide (IDH) et dihydrazide sébacique (SDH).
Copolymère diacétone acrylamide
Couches minces
Polyacryliques
Polyéthylène
Polymères -- Synthèse
Polymères hydrosolubles
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : An ambient-temperature self-crosslinkable acrylic resin was synthesized by solution polymerization, with ethanol as solvent; butyl acrylate (BA), methyl methacrylate (MMA), acrylic acid (AA), hydroxypropyl acrylate (HPA), and diacetone acrylamide (DAAM) as monomers; and adipic acid dihydrazide (ADH) as crosslinker. The resin could be diluted by water. The resin was used for PE film ink, and its curing behavior and film properties were studied. FTIR and DSC results indicated that the reaction between ketone carbonyl and hydrazine groups could occur during film curing at ambient temperature and improved glass transition temperature (T g) of the film by 12.67°C. Crosslinking density of film increased with DAAM content and m(ADH)/m(DAAM) ratio. Adhesion on PE film increased with DAAM content, while it first increased then decreased with m(ADH)/m(DAAM) ratio. Water absorption of film decreased with DAAM content, while it first decreased then increased with m(ADH)/m(DAAM) ratio. The optimal m(ADH)/m(DAAM) ratio and DAAM content in this experiment are 0.8:1 and 2%, respectively. Compared with ambient-temperature self-crosslinkable emulsion, this water-soluble resin shows film not only with the same adhesion, but also without any shrinkage void, indicating better film-forming ability on PE film. The ambient-temperature self-crosslinkable water-soluble acrylic resin shows excellent potential application in water-based ink for PE film because of good film-forming ability and adhesion and low water absorption. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of ambient-temperature self-crosslinkable acrylic resin - Preparation of ink film - Characterization
- RESULTS AND DISCUSSION : FTIR spectra analysis - DSC analysis - GPC analysis - Influence of DAAM content on the properties of films - Influence of ADH/DAAM ratio on the properties of films - Influence of surface tension of PE film - Curing temperature and timeDOI : 10.1007/s11998-015-9742-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9742-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25377
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 73-80[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17819 - Périodique Bibliothèque principale Documentaires Disponible