Controlled polymer pigment dispersants / Clemens Auschra in PAINTINDIA, N° annuel 2005 (2005)

[article]  inPAINTINDIA > N° annuel 2005 (2005) . - p. 181-190 Titre : Controlled polymer pigment dispersants Type de document : texte imprimé Auteurs : Clemens Auschra, Auteur ; Ernst Eckstein, Auteur ; Ralf Knischka, Auteur ; Frank Pirrung, Auteur ; Peter Harbers, Auteur Année de publication : 2005 Article en page(s) : p. 181-190 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Note de contenu : - NOVEL POLYMERIZATION REGULATORS FOR CFRP - SYNTHESIS OF CONTROLLED BLOCK COPOLYMER DISPERSANTS - APPLICATION TESTING OF CONTROLLED DISPERSANTS : Carbon black pigments - Performance of controlled dispersants in RMPC - Controlled dispersants for specific organic pigments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11982 [article]

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Controlled polymer pigment dispersants / Clemens Auschra in SURFACE COATINGS INTERNATIONAL. PART A : COATINGS JOURNAL, Vol. 89, A8 (12/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART A : COATINGS JOURNAL > Vol. 89, A8 (12/2006) . - p. 377-383 Titre : Controlled polymer pigment dispersants Type de document : texte imprimé Auteurs : Clemens Auschra, Auteur ; Ernst Eckstein, Auteur ; Ralf Knischka, Auteur ; Frank Pirrung, Auteur ; Peter Harbers, Auteur Année de publication : 2006 Article en page(s) : p. 377-383 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Polymeric pigment dispersants are an indispensable class of additives for the production of high-quality pigment dispersions used in modern paints. A uniform and stable dispersion of the pigments is necessary to achieve good colouration properties and high gloss in the final coating. In addition, well-selected pigment dispersants can contribute to increased production economics by allowing higher pigment loadings and faster grinding. Note de contenu : - NOVEL POLYMERISATION REGULATORS FOR CFRP - SYNTHESIS OF CONTROLLED BLOCK COPOLYMER DISPERSANTS - APPLICATION TESTING OF CONTROLLED DISPERSANTS En ligne : https://drive.google.com/file/d/1fNQfVLiraHCpFfKGDJP11SaqZSMTh7pC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16448 [article]

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Controlled polymers for pigment dispersants / Clemens Auschra in EUROPEAN COATINGS JOURNAL (ECJ), N° 6/2004 (06/2004)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 6/2004 (06/2004) . - p. 26-35 Titre : Controlled polymers for pigment dispersants Type de document : texte imprimé Auteurs : Clemens Auschra, Auteur ; Ernst Eckstein, Auteur ; Ralf Knischka, Auteur ; Frank Pirrung, Auteur ; Peter Harbers, Auteur Année de publication : 2004 Article en page(s) : p. 26-35 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Controlled free radical polymerization - Techniques based on controlling free radical polymerization have recently been commercialized for pigment dispersions. Such systems based on acrylic block copolymers show good dispersant properties and could help to meet the challenges of future coatings. En ligne : https://drive.google.com/file/d/1SKUB4sJUhVX0Fzc6ydy7lInhL8tQd2qt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9350 [article]

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Improved durability through reactive dispersant technology / Steffen Onclin in COATINGS TECH, Vol. 15, N° 7 (07/2018)  

[article]  inCOATINGS TECH > Vol. 15, N° 7 (07/2018) . - p. 22-33 Titre : Improved durability through reactive dispersant technology Type de document : texte imprimé Auteurs : Steffen Onclin, Auteur ; Kou Huiguang, Auteur ; Rainer Diehl ; Elena Martinez ; Clemens Auschra ; Andrew Recker ; Anthony Moy Année de publication : 2018 Article en page(s) : p. 22-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents dispersants (chimie) Copolymère acrylique mélamine Copolymères séquencés Essai de dureté Essais dynamiques Granulométrie Noir de carbone Pâte pigmentaire Pigments Polymères à terminaison hydroxyle Polyuréthanes Revêtements -- Additifs:Peinture -- Additifs Rhéologie Vernis bi-composant Vernis en phase aqueuse Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : Even though formulation additives comprise only a minor part of a coating formulation, they can have pronounced effects on the physical properties of the final coating. This is especially true for pigment dispersants, which can enter a coating formulation “under the radar” through, for example, pigment pastes.  As dispersants are often polar polymers with a low glass transition temperature, the interface between the pigment and continuous phase forms a weak point, especially in coatings designed for high durability. This article addresses the development of an improved dispersant technology. The dispersants are functionalized such that they become part of the continuous phase of the coating, improving overall film integrity. Application examples, in both waterborne and solventborne formulations, demonstrate the effects of reactive technology on mechanical and barrier properties in comparison to conventional systems. Note de contenu : - Effect of dispersants on coatings properties - Dispersant with new anchoring chemistry - Reducing negative impact of dispersants on coating properties - Towards waterborne reactive dispersants - Fig. 1 : Stabilization mechanisms of dispersants - Fig. 2 : Effect of exchanging part of grinding resin with dedicated dispersant (internal BM 1) on pigment paste rheology and transparecy in a solventborne MS OEM system. Values in brackets reflect dispersant dosage (active dispersant on pigment) - Fig. 3 : Pendulum hardness and MEK-rub test results of a solventborne MS-OEM basecoat after the addition of 20% pigment paste. Values in brackets reflect dispersant dosage (active dispersant on pigment). MEK-rubs were performed directly on the basecoat - Fig. 4 : Mill base viscosities, fresh and after two weeks at 50°C, as a function of dispersant dosage. Pigment pastes are resin-free and contain 13% carbon-black - Fig. 5 : Average particle size of pigment pastes as function of dispersant dosage. Particle size measurements were performed two days after pigment paste preparation - Fig. 6 : Schematic representation of working principle of analytical ultra-centrifuge - Fig. 7 : Dispersant adsorption in a solventborne, resin-free carbon black pigment paste, measured with an anlytical ultra-centrifuge. Effective (measured) dispersant on pigment is plotted againsf formulated dispersant on pigment - Fig. 8 : Jetness and undertone values in a medium-solids OEM basecoat. Coatings were applied on a glass substrate and measurements wre taker from the backside (through the glass) to reduce surface effects - Fig. 9 : Jetness and undertone values in a 2KPU topcoat. Coatings were applied on a glass substrate and measurements were taken from the backside (though the glass) to reduce surface effects - Fig. 10 : Schematic representation of co-reactive dispersant concept. The dispersant becomes part of the continuous resin phase to improve film integrity - Fig. 11 : Pendulum hardness and MEK-rub resistance of an MS-OEM basecoat. The MEK-rub test was performed directly on the basecoat - Fig. 12 : Pendulum hardness and chemical resistance of a 2KPU topcoat, containing 20% pigment paste. Chemical resistance after 16h exposure. Chemical resistance rating : 5 = no change, 1 = strong change/damage - Fig. 13 : Functionalization of block copolymer dispersants with hydroxyl-functional groups - Fig. 14 : Pigment paste rheology (fresh) of resin-free pigment concentrates containing 18% PBk 7 and a DOP level of 100%. Jetness and undertone in a WB 1K acrylic melamine topcoat, applied on glass, after mixing with 20% pigment paste. Measurements were taken from the backside (though the glass) - Fig. 15 : Pendulum hardness of WB 1K acrylic melamine topcoat containing 20% of carbon black pigment paste - Fig. 16 : Chemical resistance of a 1k acrylic melamine topcoat, containing 20% pigment paste. Data after 16h exposure. Chemical resistance rating : 5 = no change, 1 = strong change/damage En ligne : https://drive.google.com/file/d/1CDNJI6SBFF_mE-AMpYjliE_s5klSpHDp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31209 [article]

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Peak performance, solvent-based dispersing agents for Cu-phthalocyanine pigments / Manfred Jorna in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4591 (12/2013)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 203, N° 4591 (12/2013) . - p. 14-16 Titre : Peak performance, solvent-based dispersing agents for Cu-phthalocyanine pigments Type de document : texte imprimé Auteurs : Manfred Jorna, Auteur ; Lars Hoffmann, Auteur ; Steffen Onclin, Auteur ; Clemens Auschra, Auteur ; Elena Martinez, Auteur ; Andreas Gernandt, Auteur ; Andrea Schamp, Auteur Année de publication : 2013 Article en page(s) : p. 14-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs Agents dispersants (chimie) Copolymères séquencés Dispersions et suspensions Phtalocyanine de cuivre Pigments organiques Rhéologie solvants Index. décimale : 667.9 Revêtements et enduits Résumé : Cu-phthalocyanine pigments represent one of the major classes of organic pigments that are used in the coatings and ink industries. Although used extensively, dispersing these pigments is by no means without a challenge. Especially as the rheological behaviour of the mill base can be difficult to control, which might lead to decreased pigment loading or the need for a synergist. Such synergists usually have a positive effect on rheology but can lead to leaching problems in the final application. In order to fulfil the market needs, two dedicated dispersing agents have been added to BASF's portfolio. Its most recent products, Efka PX 4350 and Efka PX 4351 are high performance dispersing agents, specially developed for processing Cu-phthalocyanine pigments ; their use ensures peak performance in viscosity reduction and optimum colour development in high-end solvent-based applications including high solids. Note de contenu : - Block copolymer dispersing agents based on CFRP technology - Dispersing agents for solvent-based applications based on advanced polymeric design - Application highlights : Results and findings En ligne : https://drive.google.com/file/d/1K0Qig414EsBKD0S-uKjbMKgGMx4mQN7Z/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20166 [article]

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Tailor-made additives / Clemens Auschra in EUROPEAN COATINGS JOURNAL (ECJ), N° 04/2005 (04/2005)  

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