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Microbial contamination and cross-contamination in paint manufacture : Causes and remedy / Sushma Lokhande in PAINTINDIA, Vol. LXXIII, N° 9 (09/2023)  

[article]  inPAINTINDIA > Vol. LXXIII, N° 9 (09/2023) . - p. 54-62 + 74 Titre : Microbial contamination and cross-contamination in paint manufacture : Causes and remedy Type de document : texte imprimé Auteurs : Sushma Lokhande, Auteur Année de publication : 2023 Article en page(s) : p. 54-62 + 74 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contamination microbienne Hygiène du travail Matières premières Procédés de fabrication Revêtements en phase aqueuse:Peinture en phase aqueuse Revêtements:Peinture Index. décimale : 667.6 Peintures Résumé : The goal of every chemical manufacturer is to ship a quality product to his customer. One common requirement for waterborne products such as coatings is that the product remains microbiologically stable until used, and in some instances, for some period alter its use (paint films for example). Being aqueous, these products are susceptible to microbial contamination and degradation. Anti-microbial (biocides) are routinel y added to assist with the delivery and maintenance of productqualities so that they meet customer expectations. However, it has long been apparent that even adding an appropriate lab tested anti-microbial to the finished product may not be sufficient to accomplish th is goal due to some unseen challenges at manufacturing level which remain out of scope during product development at lab scale. It is now understood that the product must first, and foremost, be manu factured under a tightly controlled process that includes adequate plant hygiene. Doing so m in im izes the final cost of the product and helps ensure that a quality product is manufactured and delivered. Contamination and cross-contamination in paint and coatings manufacturing is a serious issue. As, it can occur at any point of the manufacturing cycle — during production, processing, packaging, distribution or storage. This article also details some of the areas of concem in a "generalized" aqueous product (such as coating) manufacturing scheme. The intention is to highlight those areas that are most likely to cause microbial quality problems so that a plant hygiene program can proactively address them. Regular attention to hygiene at the plant will pay dividende to the manufacturing process of waterborne paints. Note de contenu : - Plant hygiene and its importance : Raw materials - Water - Equipment - Cellulosic thickener solution - Mill base - Biocide addition validation & records - Filling line - Packaging material - Storage/transportation of finished gods - Source water and source water-handling systems - Recycled water and recycled water-handling systems - Recycled raw material or recycled product - Raw material storage and handling systems - Mixing, milling and reaction vessels - Product packaging systems - Product transportation and delivery systems - Dip slide method - ATP testing method : adenosine triphosphate (ATP) measurement technology En ligne : https://drive.google.com/file/d/1QJFNZ7szKYJ9AJ6F9jc0WAAzWA8upbIH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40397 [article]

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Microwave absorbing coating based on epoxy/ionic liquid system : A review / Uday D. Patil in PAINTINDIA, Vol. LXXIII, N° 9 (09/2023)  

[article]  inPAINTINDIA > Vol. LXXIII, N° 9 (09/2023) . - p. 64-74 Titre : Microwave absorbing coating based on epoxy/ionic liquid system : A review Type de document : texte imprimé Auteurs : Uday D. Patil, Auteur Année de publication : 2023 Article en page(s) : p. 64-74 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Diélectriques Epoxydes Liquides ioniques Micro-ondes -- Absorption Réticulants Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : This is the review on Microwave absorbing coating based on Epoxy/lonic Liquids (ILs) which is used alone and in combination with Hardeners MTHPA and MCDEA. lonic Liquid is used as a curative for Epoxy resin in this review paper but it has many more advantageous benefits over conventional curing systems e.g. used in Solvent recovery, as a Lubricant, as a Plasticizer, and as a Catalyst. Microwave radiation is a more crucial topic for today's life and getting rid of it is a challenge. So here cornes a solution lonic Liquid-based Microwave radiation absorbing coating. lonic Liquid (IL) is changing the future of the epoxy system and is also based on green chemistry which can be helpful to reduce environmental stress. Neat bmim.BF4 was able to cure epoxy resin, giving rise to networks with outstanding thermal stability compared with the systems cured with an anhydride or aromatic amine. The epoxy networks were cured with bmim.BF4 atone or in combination with an anhydride or aromatic amine were transparent and presented considerable microwave absorbing properties in the X- band frequency range (8-12 GHz), being the best performance observed for the systems cured with bmim.BF4/anhydride curing system, with reflection loss value around —16 dB at 11.3 Ghz. In another part, the microwave-absorbing properties of 1-ethyl-3-methylimidazolium and 1- buty/-3 methylimidazolium ([E and BMlm] +- based) room-temperature ionic liquids (ILs) with different anions were systematically investigated by Fulong Yang et al. measuring dielectric properties in the 1-14 GHz microwave-frequency range. The results showed that the real part of permittivity' values decreased from 13 to 4 and the values of loss tangent decreased from 5.91 to 0.24, meaning that ILs displayed high dielectric-loss characteristics at microwave-frequency ranges. Furthermore, it was found that the conductivity loss was dominant for dielectric loss in the low-frequency band, and the polarization loss played a major role in high-frequency bands. For the same anion ILs with different cations, the permittivity became higher as the length of the alkyl chain decreased. The absorption properties of [E and BMlm] +- based ILs could be obtained based on their dielectric properties and found the ILs absorption bands were mainly concentrated in the C band and X band. It was noted that the maximum reflection loss (RL) of [BMIrn][NTf2] with a thickness of 4 mm reached — 27.6 dB at 8.73 GHz, and the bandwidth of an RL less than 10 dB could be up to 4.3 GHz. The absorption peak frequency of the ILs gradually shifted to lower frequencies with increasing temperature and coating thickness, which might be caused by the change in impedance matching. Note de contenu : - Types of ionic liquids - Application of ionic liquid : Ionic liquids as catalytic agents - Ionic liquids as ionic conducting agents - Ionic liquids as lubricants - Ionic liquid with microwave absorbing coating - Materials - Used - Dielectric properties - Microwave-absorption properties - Table 1 : General overview of ionic liquid influence on epoxy resins - Table 2 : Change in maximum reflection losses values of RLM (dB) and peak frequency (FP of [BMIm] +- based ILs with different temperatures - Table 3 : Details of maximum reflection losses values of RLM (dB) and peak frequency (FP) of [BMlm] +- based ILs En ligne : https://drive.google.com/file/d/1CaE6b9g0EOPyRpiHoe_XSWnbBBjCgu3K/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40398 [article]

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Super water based primers / Harish Agrawal in PAINTINDIA, Vol. LXXIII, N° 9 (09/2023)  

[article]  inPAINTINDIA > Vol. LXXIII, N° 9 (09/2023) . - p. 98-100 Titre : Super water based primers Type de document : texte imprimé Auteurs : Harish Agrawal, Auteur Année de publication : 2023 Article en page(s) : p. 98-100 Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Formulation (Génie chimique) Primaire (revêtement) Revêtements en phase aqueuse Revêtements organiques Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Water based "super primer" systems are all water-based, and they do not contain chromates or other toxic ingredients. Thus, they are low VOC, environmentally friendly. In this article we will be discussing on that much thicker, primer-like coatings that can be obtained from silanes. If the silanes are mixed with organic resins in small percentage then Self-priming coatings having thickness of up to 20 Nm have been obtained with outstanding adhesion and corrosion protection properties. Note de contenu : - Water based DIP - Primer (based on styrene-acrylic resin) : Properties - Application method - Anticorrosion primer (based on polybutadiene dispersion : Properties - Primer based on water soluble epoxy resin : Mixing ratio - Remarks - Table 1 : Guideline formulation for water based DIP-primer - Table 2 : Guideline formulation for anti-corrosion primer - Table 3 : Guideline forulation for primer based on epoxy resin. (Water soluble) En ligne : https://drive.google.com/file/d/1oUp3Iwh9BAQQgW3R6RwVBEOmcbnYBHNH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40399 [article]

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Dispersion principles you should know / M. Veeramani in PAINTINDIA, Vol. LXXIII, N° 9 (09/2023)  

[article]  inPAINTINDIA > Vol. LXXIII, N° 9 (09/2023) . - p. 113-115 Titre : Dispersion principles you should know Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2023 Article en page(s) : p. 113-115 Langues : Anglais (eng) Catégories : Agents dispersants (chimie) Agents mouillants Dispersions et suspensions Pigments Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.6 Peintures Résumé : It takes great pleasure to inform the readers that this is my 105th chapter. I am trying to touch upon many topics under the Water Based Paints, in addition I am dealing with some fringe topics that has relevant to the core subject. I will try to cover as much as possible to give enough information to the readers especially from the Small-Scale Sector. En ligne : https://drive.google.com/file/d/1JXtETuCQjC0Nps253hcpnMWEOmNBGO3F/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40400 [article]

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What type of compression joints sealing lubricant adhesives is suitable for concrete pavement manufacturer ? / Harish Agrawal in PAINTINDIA, Vol. LXXIII, N° 9 (09/2023)  

[article]  inPAINTINDIA > Vol. LXXIII, N° 9 (09/2023) . - p. 116-117 Titre : What type of compression joints sealing lubricant adhesives is suitable for concrete pavement manufacturer ? Type de document : texte imprimé Auteurs : Harish Agrawal, Auteur Année de publication : 2023 Article en page(s) : p. 116-117 Langues : Anglais (eng) Catégories : Adhésifs -- Propriétés physiques Colles:Adhésifs Formulation (Génie chimique) Joints d'étanchéité Lubrifiants Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Liquid synthetic joints sealing lubricant adhesives is two component master adhesive, after mixing two components final single pack 30% solution is used as a joint sealing adhesive for concrete pavement. Do not apply liquid synthetic adhesive to the bottom of gaps of the profile, it is to be applied on the sides of the cotton rope profile final ly pressed by machine as shown in figure. Note de contenu : - Table 1 : Guideline Formulation for joints sealing lubricant adhesives - Table 2 : Physical properties En ligne : https://drive.google.com/file/d/12l3Um1vJJ6Ok1M-thFrzexgjvo8wuLF5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40401 [article]

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