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Titre : Mix and match : Combining solution and emulsion polymerised polyols improves properties Type de document : texte imprimé Auteurs : Jaap Akkerman, Auteur ; Dirk Mestach, Auteur Année de publication : 2008 Article en page(s) : p. 26-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Polymérisation en émulsion
Polyols
PolyuréthanesIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne polyurethane coatings can combine high performance with low VOC content. However, some conflicts exist when formulating these coatings. It is shown that mixtures of high MW dispersion polyol and low MW emulsion polyols may give the best combination of hardness, crosslinking, drying time and solvent resistance. En ligne : https://drive.google.com/file/d/1UmGT3Ef8w03xw45DmHK5nuYyBmYBwov7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2671
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10/2008 (10/2008) . - p. 26-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010731 - Périodique Bibliothèque principale Documentaires Disponible Modification of styrene-acrylic emulsion by organic UV absorber in synergy with fluorine and silicon monomers for weatherable coatings / Wei Dong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
[article]
Titre : Modification of styrene-acrylic emulsion by organic UV absorber in synergy with fluorine and silicon monomers for weatherable coatings Type de document : texte imprimé Auteurs : Wei Dong, Auteur ; Lei Zhou, Auteur ; Yanni Guo, Auteur ; Yining Tang, Auteur ; Rong Pan, Auteur ; Mengli Liu, Auteur ; Deliang He, Auteur Année de publication : 2022 Article en page(s) : p. 607-616 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Benzotriazole
Caractérisation
Copolymère styrène acrylique
Copolymères en émulsion
Enrobage (technologie)
Essais accélérés (technologie)
Fluorure de silicium
Formulation (Génie chimique)
Polymérisation en émulsion
Potentiel zeta
Rayonnement ultraviolet -- Absorption
Résistance aux conditions climatiques
Revêtements organiques
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : To improve the weather ability and thermal stability of styrene-acrylic polymer emulsion coatings, a series of novel styrene-acrylic polymer emulsion modified with 2-[2-hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzotriazole (HMEB), hexafluorobutyl methacrylate (HFMA), and vinyl-trimethoxysilane (VTMS) were prepared through semi-continuous seed emulsion polymerization. The emulsions and their coatings were characterized by Fourier transform infrared spectroscopy, ultraviolet absorption spectroscopy (UV-Vis), X-ray photoelectron spectroscopy, dynamic laser scattering, transmission electron microscopy, zeta potential, thermogravimetric analysis, and artificially accelerated aging test. According to the results, the new polymer emulsion had superior UV absorption from 308 to 364 nm. Moreover, the coating performed the best anti-aging stability when the content of HMEB, HFMA, and VTMS reached 4%, 2%, and 3%, respectively. After the 1000 h aging test, the color difference (ΔE) and rate of loss of gloss (ΔG) were only 6.86% and 51.10%, while the unmodified coatings were 16.05% and 72.22%, respectively. Furthermore, the thermal stability and water resistance of the coating were improved by fluorine and silicon monomers. The initial decomposition temperature was increased from 327 to 339°C. Moreover, the UV stabilization mechanism is preliminarily discussed. Note de contenu : - EXPERIMENTAL : Materials - Pre-emulsification - Emulsion polymerization - Coating preparation - Characterization
- RESULTS AND DISCUSSION : Basic properties of emulsions and the coatings - Zeta potential and DLS of emulsions - Morphology of emulsion particles - Chemical structure of emulsion polymer - Chemical composition of emulsion coatings - UV absorption property of coatings - Thermal stability of emulsion coating - The aging acceleration test of emulsion coatings - Protective properties of emulsion coatings
- Table 1 : Emulsion polymerization formula
- Table 2 : Basic properties of emulsions and the coatings
- Table 3 : Surface composition of different coatings/atomic %DOI : https://doi.org/10.1007/s11998-021-00550-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00550-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37291
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 2 (03/2022) . - p. 607-616[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23408 - Périodique Bibliothèque principale Documentaires Disponible Nano-TiO2/organic fluorine polyacrylate emulsion coating for leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 2 (03-04/2021)
[article]
Titre : Nano-TiO2/organic fluorine polyacrylate emulsion coating for leather Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 77-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact
Antibactériens
Caractérisation
Copolymérisation
Cuirs et peaux -- Finition
Dioxyde de titane
Fluor
Nanoparticules
Polyacrylates
Polymérisation en émulsion
Revêtements organiquesIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Nano-Ti02/organic fluorine polyacrylate emulsion was prepared by using dodecafluoroheptyl methacrylate (G04), modified nano-TiO2 , methyl methacrylate (MMA), ethyl acrylate (EA) as the main raw materials and potassium persulfate as the initiator. The structure of the emulsion was characterized by FTIR, TEM and UV, and the influence of nano-TiO2 and organic fluorine monomers on the application performance of leather was investigated.
The results showed that the organic fluorine monomers and nano-TiO2 participated in the copolymerization with acrylate, the prepared emulsion had a core-shell structure, and KH570 improved the dispersion of nano-TiO2 Compared with pure polyacrylate emulsion, the UV transmittance of the composite emulsion was obviously decreased. The contact angle of leather to water was about 131.16° after finishing with fluorine-containing polyacrylate emulsion, which showed good hydrophobicity. After adding the polyacrylate emulsion containing nano-TiO2 to finish the leather, the inhibition zone diameter of Escherichia coli was 5.1mm, showing good antibacterial properties. With the introduction of nano-TiO2 and organic fluorine, the applied properties of the finished leather were also effectively improved.Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Prepartion of modified nano-TiO2 - Preparation of nano-TiO2/organic fluorine polyacrylate emulsion - Finishing technology of leather - FTIR characterisation of latex films - TEM analysis of emulsion - TEM analysis of emulsion - Contact angle of finished leather to water - Test of antibacterial activity of finished leather - Testing of the finished leather applied properties
- RESULTS AND DISCUSSION : FTIR analysis - TEM analysis - UV analysis - Measurement of contact angle of leather to water - Antibacterial activity of leather - Testing of the finished leather applied performance
- Table 1 : Application performance of the finished leatherEn ligne : https://drive.google.com/file/d/1lEuv5JO8RIeW0cncBdA2v_1mkP47mal1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35544
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 2 (03-04/2021) . - p. 77-80[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22651 - Périodique Bibliothèque principale Documentaires Disponible Nanolatex technology 1 : synthesis and characterization of nanosize acrylic latexes and comparison to their conventional size counterparts / Ravi G. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Nanolatex technology 1 : synthesis and characterization of nanosize acrylic latexes and comparison to their conventional size counterparts Type de document : texte imprimé Auteurs : Ravi G. Joshi, Auteur ; Frank N. Jones, Auteur ; Theodore Provder, Auteur ; Weidian Shen, Auteur Année de publication : 2021 Article en page(s) : p. 1481-1500 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Coalescence (Sciences physiques)
Formation de film
Latex
Microémulsions
Morphologie (matériaux)
Nanoparticules
Polyacryliques
Polymères -- Synthèse
Polymérisation en émulsion
Réticulation (polymérisation)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : For this study, functional precoalescence (internally crosslinked) and postcoalescence (crosslinkable) conventional latexes were made using seeded semi-continuous emulsion polymerization. Nanosize polymer latexes with or without crosslinkable functional groups were made using a modified microemulsion copolymerization process. Films cast from conventional and nanosize latex were characterized using specific end use tests and fundamental properties using dynamic mechanical analysis, modulated differential scanning calorimetry, and atomic force microscopy. This study compares conventional and nanosize latex with respect to the effect of the type and level of crosslinking, particle size and distribution on latex film formation and morphology, and end use and fundamental properties. Nanosize latex films in general have superior gloss, solvent resistance, and adhesion but inferior water resistance. Stress–strain Young’s modulus showed an increase as a function of increasing crosslinker level in the nanosize latex films. Note de contenu : - EXPERIMENTAL : Preparation of nanoparticle latexes using improved modified microemulsion copolymerization - Materials - Preparation of conventional size precoalescence or postcoalescence crosslinked conventional latexes
- CHARACTERIZATION OF LATEXES : Latex properties - Film properties of conventional latexes and nanoparticle latexes - Thermal and mechanical properties of conventional latexes and nanoparticle latexes - Measurements with AFM of conventional latexes and nanoparticle latexes
- RESULTS AND DISCUSSIONS : Nanosize latex synthesis and characterization - Film formation by “precoalescence” and “postcoalescence” crosslinked latexes - Gel content results - End-use film properties - Fundamental mechanical properties - Stress–strain analysis of constituent nanosize latexes with precoalescence and postcoalescence crosslinking and comparisons with their conventional size counterparts - Dynamic mechanical properties
- Table 1 : Composition table for nanosize latexes (with or without functional group)
- Table 2 : Characteristics of conventional (with or without crosslinker) latexes
- Table 3 : Characteristics of nanosize (with or without crosslinker) latexes
- Table 4 : End-use properties of films cast from conventional latexes
- Table 5 : End-use properties of films cast from nanosize latexes AFM results
- Table 6 : Comparison of surface smoothness and gloss values of nanoparticle latexes and their conventional counter parts
- Table 7 : Results of stress–strain analysis of nanosize latexes
- Table 8 : Results of stress–strain analysis of conventional size latexes
- Table 9 : Comparison of DMA values with MDSC Tg values of conventionally size precoalescence or postcoalescence crosslinked latexes
- Table 10 : Comparison of DMA values with MDSC Tg values of nanosize precoalescence or postcoalescence crosslinked latexesDOI : https://doi.org/10.1007/s11998-021-00475-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00475-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36803
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1481-1500[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Nanosphere latex synthesis using novel eco-friendly surfactants via emulsion polymerization / Afzal M. Awan in COATINGS WORLD, Vol. 24, N° 4 (04/2019)
[article]
Titre : Nanosphere latex synthesis using novel eco-friendly surfactants via emulsion polymerization Type de document : texte imprimé Auteurs : Afzal M. Awan, Auteur Année de publication : 2019 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biosurfactants
Chlorure de polyvinyle
Emulsions -- Stabilité
Granulométrie
Haut extrait sec
Latex
Nanoparticules
Polyacryliques
Polyéthylène
Polyéthylène téréphtalate
polymères vinyliques
Polymérisation en émulsion
PolypropylèneIndex. décimale : 667.9 Revêtements et enduits Résumé : Surfactants are used in emulsion polymerization (EP) formulas at less than two percent of the total mass, but they play an important role in the EP processes. Surfactants contribute to the latex particle formation, their size and stability and they enhance the compatibility with the EP formula components, as well as ingredients used in product formulations, i.e., coatings, and pressure sensitive adhesives (PSAs).
This paper presents novel, eco-friendly surfactants and their use in the EP process and discusses surfactant ionic activity and its effects on particle size and process cleanliness. Latex synthesized with surfactant optimal blends containing anionic and nonionic moieties are discussed; latex synthesized with optimal blend surfactant properties, and its coatability on paper, polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), and polyvinyl chloride (PVC) films is presented.Note de contenu : - EP-3 and EP-6 surfactant properties
- Seed synthesis with EP-3 and EP-6
- Seed synthesis with EP-6
- Emulsion study
- Synthesis of high solids latexes
- EP-8 as a synergetic VOC- and APE-free surfactant
- Fig. 1 : Particle size of seed latex measured via Malvern Zeta sizer Nano ZS90
- Fig. 2 : The particle overlays of samples TLC 37-114
- Fig. 3 : Vinyl acrylics and acrylics emulsions stability at ambient conditions after 2 hours, 4 hours and 6 hours
- Fig. 4 : Latex solid formation at various interval of an EP- reaction
- Fig. 5 : The pre-emulsion, in the syringe, stability and latex stability in reactor after overnight mixing
- Fig. 6 : A particle size fractogram shows the particle’s evolution and growth with the addition of monomers at three separate intervals
- Table 1 : TLC EP-3 surfactant properties
- Table 2 : Seed recipe
- Table 3 : The properties of a latex seed prepared with EP-3 from various lot and activities
- Table 4 : The seed synthesis of EP-6
- Table 5 : The recipe used to make a full-blown latex
- Table 6 : A low Tg acrylics latex properties synthesized with EP-3
- Table 7 : The acrylics latex properties
- Table 8 : The multi-step seeded process to develop ultrafin particlesEn ligne : https://www.coatingsworld.com/issues/2019-04-01/view_technical-papers/nanosphere [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32510
in COATINGS WORLD > Vol. 24, N° 4 (04/2019)[article]Nanotechnology & coatings Q & A / Vinayak M. Natu in PAINTINDIA, Vol. LVIII, N° 12 (12/2008)
PermalinkNanotechnology & coatings Q & A / Vinayak M. Natu in PAINTINDIA, Vol. LX, N° 8 (08/2010)
PermalinkA new approach for bating : reactive red 120 dye atached poly(hema) nanoparticles / Safiye Meric Acikel in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 2 (03-04/2019)
PermalinkNon-migratory surfactants in emulsion polymerisation / Jo Grade in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4627 (12/2016)
PermalinkA novel acrylate-PDMS composite latex with controlled phase compatibility prepared by emulsion polymerization / Weili Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)
PermalinkNovel composite latex particles for use in coatings / Gerald A. Vandezande in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 828 (01/1994)
PermalinkOne-step mini-emulsion copolymerisation of waterborne polysiloxane-modified polyacrylate/pigment hybrid latex and its application in textile pigment printing / Fenping Wang in COLORATION TECHNOLOGY, Vol. 138, N° 3 (06/2022)
PermalinkOrganic fluorosilicone modified polyacrylate emulsion finishing agent / Sui Zhihui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)
PermalinkOrganic fluorosilicone modified waterborne polyurethane leather finishing agent / Zhao Wenjing in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 1 (01-02/2023)
PermalinkPermalinkLes polymères vinyliques en émulsion pour peinture / M. Tapin / Paris : AFTPVA (1976)
PermalinkPolymerizable allyl anionic and nonionic emulsifier: synthesis and properties of its emulsion for architectural coating / Ye Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
PermalinkPolymers for water-based coatings - a systematic overview / J. C. Padget in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 839 (12/1994)
PermalinkPolypyrrole-coated latex particles as core/shell composites for antistatic coatings and energy storage applications / S. M. M. Morsi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)
PermalinkPolyurethane/polyacrylate/silica nanocomposite prepared by seeded emulsion polymerization and the properties of finished leather / Yan Bao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 6 (11-12/2013)
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