Accueil
Catégories
> Stabilisants (chimie)
Stabilisants (chimie)Voir aussi
|
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
La photostabilisation par additivation / J. Lemaire in CAOUTCHOUCS & PLASTIQUES, N° 754 (11/1996)
[article]
Titre : La photostabilisation par additivation Type de document : texte imprimé Auteurs : J. Lemaire, Auteur Année de publication : 1996 Article en page(s) : p. 68-72 Langues : Français (fre) Catégories : Photodétérioration
Photostabilité
Polymères -- Additifs
Polymères -- Détérioration
Stabilisants (chimie)Index. décimale : 668.4 Plastiques, vinyles Résumé : Voici une mise au point sur les mécanismes qui entrent en jeu lors du vieillissement des polymères avec, en parallèle, un éventail de toutes les stratégies de stabilisation disponibles à l'heure actuelle. Note de contenu : - La stabilisation repose sur cinq idées directrices
- Les polymères, un domaine très exigeant
- Désactivants, antioxydants conventionnels ou redox
- Caractère migrant ou non migrantPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25351
in CAOUTCHOUCS & PLASTIQUES > N° 754 (11/1996) . - p. 68-72[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 002575 - Périodique Bibliothèque principale Documentaires Disponible Photostabilization of ascorbic acid with citric acid, tartaric acid and boric acid in cream formulations / I. Ahmad in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 3 (06/2012)
[article]
Titre : Photostabilization of ascorbic acid with citric acid, tartaric acid and boric acid in cream formulations Type de document : texte imprimé Auteurs : I. Ahmad, Auteur ; M. Ali Sheraz, Auteur ; S. Ahmed, Auteur ; Z. Shad, Auteur ; F. H. M. Vaid, Auteur Année de publication : 2012 Article en page(s) : p. 240-245 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cinétique chimique
Cosmétiques
Formulation (Génie chimique)
Photodétérioration
Stabilisants (chimie)
Vitamine CIndex. décimale : 668.5 Parfums et cosmétiques Résumé : This study involves the evaluation of the effect of certain stabilizers, that is, citric acid (CT), tartaric acid (TA) and boric acid (BA) on the degradation of ascorbic acid (AH2) in oil-in-water cream formulations exposed to the UV light and stored in the dark. The apparent first-order rate constants (0.34–0.95 × 10−3 min−1 in light, 0.38–1.24 × 10−2 day−1 in dark) for the degradation reactions in the presence of the stabilizers have been determined. These rate constants have been used to derive the second-order rate constants (0.26–1.45 × 10−2 M−1 min−1 in light, 3.75–8.50 × 10−3 M−1 day−1 in dark) for the interaction of AH2 and the individual stabilizers. These stabilizers are effective in causing the inhibition of the rate of degradation of AH2 both in the light and in the dark. The inhibitory effect of the stabilizers is in the order of CT > TA > BA. The rate of degradation of AH2 in the presence of these stabilizers in the light is about 120 times higher than that in the dark. This could be explained on the basis of the deactivation of AH2-excited triplet state by CT and TA and by the inhibition of AH2 degradation through complex formation with BA. AH2 leads to the formation of dehydroascorbic acid (A) by chemical and photooxidation in cream formulations. Note de contenu : - MATERIALS AND METHODS : Preparation of cream formulations - pH measurements - Spectral measurements - Light intensity measurements - Photolysis of cream formulations - Thin-layer chromatography (TLC) of photolysed creams - Assay of ascorbic acid in creams
- RESULTS AND DISCUSSION : Products of ascorbic acid photodegradation - Spectral changes in photodegraded creams - Assay of ascorbic acid in creams - Kinetics of photodegradation - Effect of stabilizers - Statistical evaluation of stabilizers and concentration - Degradation of AH2 in presence of stabilizers in the dark - Mode of interactionDOI : 10.1111/j.1468-2494.2012.00708.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2012.00708.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15034
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 34, N° 3 (06/2012) . - p. 240-245[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 13924 - Périodique Bibliothèque principale Documentaires Disponible
[article]
Titre : Pigment dispersion technology Part I Type de document : texte imprimé Auteurs : Tipanna Melkeri, Auteur Année de publication : 2020 Article en page(s) : p. 71-74 Langues : Anglais (eng) Catégories : Dispersions et suspensions
Mouillage (chimie des surfaces)
Pigments
Stabilisants (chimie)Index. décimale : 667.2 Colorants et pigments Résumé : Pigment dispersion process take place in three steps. I) Wetting, II) Dispersion and III) Stabilisation. Wetting of solid surface can be defined as uniform spreading of liquid on sol id surface. When contact angle of liquid phase with sol id particle is zero then it is said to be completely wetted and hence monolayer of liquid on the sol id surface is formed. To have better wetting HLB value of liquid phase should be comparable with HLB value of pigments. HLB value of liquid phase can be adjusted by adding suitable. In th is step breaking of agglomerates into fi ner particles occurs. Two principles are used to split agglomerates into smaller pieces are shear action and impact action. The disperse particles are in the state of higher energy, the primary particles have a tendency to re-agglomerate. This process is called flocculation. Particles that have been separated from each other must be stabilized to prevent flocculation. Therefore, immediately alter grinding pigment suspensions must be stabilized by the addition of additives. Stabil ization is achieved through absorption of stabil izing molecules on the pigment surface. Therefore, there are two principal mechanisms for the stabil ization of pigmented dispersions namely electrostatic stabilisation and Steric stabilisation. Note de contenu : - INTRODUCTION : 1) Wetting process
- THERMODYNAMIC BEHIND WETTING PROCESS : Dispersion (size reduction) - Stabilisation - Colloidal stabilisation - Electrostatic stabilisation - Steric stabilisationEn ligne : https://drive.google.com/file/d/1IGOmbnJl2nDVsdOTaVO_4U0GO0_xp4I3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35194
in PAINTINDIA > Vol. LXX, N° 11 (11/2020) . - p. 71-74[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22555 - Périodique Bibliothèque principale Documentaires Disponible Pigment particle interactions with viscose polymeric media during manufacturing of dope dyed viscose fibers / Esha Sharma in CHEMICAL FIBERS INTERNATIONAL, Vol. 70, N° 2/3 (09/2020)
[article]
Titre : Pigment particle interactions with viscose polymeric media during manufacturing of dope dyed viscose fibers Type de document : texte imprimé Auteurs : Esha Sharma, Auteur ; Neelesh Shukla, Auteur ; Gurudatt Krishnamurthy, Auteur ; Sunil Bhagwat, Auteur ; Ravindra V. Adivarekar, Auteur Année de publication : 2020 Article en page(s) : p. 95-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie textile
Dispersions et suspensions
Filature au mouilléProcédé dans lequel une solution de substance fibrogène est extrudée dans un milieu liquide de coagulation où le polymère est régénéré, comme dans la fabrication de la viscose ou de la rayonne cuproammoniacale.
Pigments
Stabilisants (chimie)
Teinture -- Fibres textiles synthétiques
Teinture dans la masse
ViscoseIndex. décimale : 677.4 Textiles artificiels Résumé : Wet treatment post-fiber processing such as dyeing, finishing and function-alization of fabrics results in the generation of a large amount of effluents of dyes and chemicals, creating an adverse impact on the environment and human health. Imparting the coloration and functionalization during the process of making the fiber itself is an effective solution practiced in the synthetic and regenerated cellulosicfiber industry to reduce this impact, e.g. dope dyeing, adding cationic dyeability etc. The challenges involved in the case of fiber level modifications in regenerated cellulose process like viscose are different from those encountered in synthetic fiber processes. Though commercial products based on fiber modifications are available, a gap exists in the understanding of additives — media interactions in the viscose process. This study has been initiated to bridge the gap and enable better processability and product quality in products made through fiber modification. In this specific article the focus is on pigment-slurry/dope interactions, during the process of making dope dyed viscose fibers. Note de contenu : - INTERACTIONS DURING DIFFERENT PROCESS STEPS : Particle - particle - media interaction at slurry stage - Particle - particle - media interaction at dope stage
- EFFECT OF KEY PARAMETERS ON AGGLOMERATION OF PIGMENT PARTICLES
- REDUCING AGGLOMERATION OFPIGMENT PARTICLES : Optimization of stabilizer chemistry in pigment slurry and viscose dope
- Fig. 1 : Schematic of environmental sustainability of Birla Spunshades
- Fig. 2 : Stages of dispersion
- Fig. 3 : Microscopic images of pigment particles in different pH solutions in slurry and dope
- Fig. 4 : Effect of concentrations of 3 stabilizers on particle size in slurry at pH 14
- Fig. 5 : Effect of 2 stabilizers and their concentrations on filterability of dope
- Fig. 6 : Back pressure increase with time lot during dope dyed fiber spinning
- Table : Few key fiber properties of fibers made at pilot scale with different stabilizersEn ligne : https://drive.google.com/file/d/1MzWHblN-I7RIpvXSIeDrtcwUW3TItYXE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34560
in CHEMICAL FIBERS INTERNATIONAL > Vol. 70, N° 2/3 (09/2020) . - p. 95-97[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22194 - Périodique Bibliothèque principale Documentaires Disponible Pigment stabilisation / Stefan Möβmer in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4507 (12/2006)
[article]
Titre : Pigment stabilisation Type de document : texte imprimé Auteurs : Stefan Möβmer, Auteur ; Manfred Knospe, Auteur ; Bernd Göbelt, Auteur Année de publication : 2006 Article en page(s) : p. 18-22 Langues : Anglais (eng) Catégories : Agents dispersants (chimie)
Agents mouillants
Pigments organiques
Revêtements -- Additifs:Peinture -- Additifs
Stabilisants (chimie)Index. décimale : 667.2 Colorants et pigments Résumé : Compared to the existing wetting and dispersing agents on the market, Disperbyk-2010 is characterised by its very good stabilisation of mard-to-disperse organic pigments. The special structure of the additive is able to significantly reduce the additive's negative effect on the water resistance of the coating. The example of Disperbyk-2010 shows how modern polymerisation technologies can be used advantageously to devlop new and improved wetting and dispersing additives. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27446
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 196, N° 4507 (12/2006) . - p. 18-22[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 005881 - Périodique Bibliothèque principale Documentaires Disponible Plasticisers, stabilisers and fillers / P. D. Ritchie / London [United Kingdom] : The Plastics Institute (1972)
PermalinkPolyelectrolytes and polyelectrolyte complexes as smart and functional coatings / S. schwarz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 205, N° 4607 (04/2015)
PermalinkPolyoléfines stabilisées aux Hals : limites d'emploi / G. De Lapasse in CAOUTCHOUCS & PLASTIQUES, N° 766 (03/1998)
PermalinkPorosity measurements in suspension plasma sprayed YSZ coatings using NMR cryoporometry and X-ray microscopy / Uta Klement in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)
PermalinkReliable detection of UV absorbers in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 11 (11/2012)
PermalinkRheology and texture of lupin protein-stabilized emulsions : a statistical approach / I. Sousa in LES CAHIERS DE RHEOLOGIE, Vol. XVI, N° 1 (10/1998)
PermalinkSilicone oil émulsions : strategies to improve their stability and applications in hair care products / H. Nazir in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 36, N° 2 (04/2014)
PermalinkSpalting colorants as dyes for wood stabilizers / He Rui in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)
PermalinkSPF boosting with fibrillated cellulose / Kulvinder Kaur in GLOBAL PERSONAL CARE, Vol. 24, N° 9 (10/2023)
PermalinkLa stabilisation des polymères / Jack Ecole / Paris : Techno-Nathan International (1987)
PermalinkStabiliser efficacement les systèmes dispersés / Karl Booten in EXPRESSION COSMETIQUE, N° Hors série (12/2015)
PermalinkStabilising retinol in skin care formulations / Gary Neudahl in PERSONAL CARE EUROPE, Vol. 7, N° 3 (04/2014)
PermalinkPermalinkStabilization of colloidal dispersions by polymer adsorption / Tatsuo Sato / New York [United States] : Marcel Dekker, Inc. (1980)
PermalinkStabilization of titanium dioxide in non-aqueous and aqueous coatings / Gururaj Moharir in PAINTINDIA, Vol. LVII, N° 5 (05/2007)
Permalink