Development of interpenetrating network of urethane/acrylic emulsion for high performance coatings / Pradeep T. Gadekar in PAINTINDIA, Vol. LI, N° 2 (suppl.) (02/2001)

[article]  inPAINTINDIA > Vol. LI, N° 2 (suppl.) (02/2001) . - p. 127-138 Titre : Development of interpenetrating network of urethane/acrylic emulsion for high performance coatings Type de document : texte imprimé Auteurs : Pradeep T. Gadekar, Auteur ; K. Krishnaraj, Auteur ; R. Mathanrajan, Auteur Année de publication : 2001 Article en page(s) : p. 127-138 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  'Peinture  émulsion'  Liant  'Réseau  polymère  interpénétré'  'Uréthanne  polymère'  Polyacryliques  Feuil  'Propriété  physique'  mécanique'  Dureté  'Absorption  d'eau'  Distribution  dimension  particule' Index. décimale : 667.9 Revêtements et enduits Résumé : The Interpenetrating Network (IPN) of urethane/acrylic emulsion polymer is developed by incorporating polyurethane dispersion (PUD) at various stages of acrylic emulsion polymerisation. The selection of initiator system is important for such a development. These developed IPN emulsions of urethane/ acrylic system were compared with plain acrylic emulsion and a physical blend of plain acrylic emulsion with two types of PUD, i.e. aliphatic urethane polymer and self crosslinking aliphatic urethane polymer with respect to mechanical properties of film, particle size distribution and water resistance. All the developed IPN emulsions were evaluated in a paint formulation for mechanical properties, chemical properties and accelerated weathering properties. They were also compared with paints based on plain acrylic emulsion and physical blends of plain acrylic emulsion with both the PUDs. Note de contenu : - Polyurethane dispersions - EXPERIMENTAL : Preparation of plain acrylic emulsion - Preparation of IPN of urethane/acrylic emulsion polymers - Preparation of physical blend of PUD and acrylic emulsion polymers - Preparation of paint - Paint testing - RESULTS AND DISCUSSION : Initiator selection for development of IPN of urethane/acrylic emulsions - Influence of urethane/acrylic IPNs on development of hardness as o function of time- Particle size distribution of emulsions - % Water absorption of emulsion films - Paint study - Mechanical properties - Chemical properties - Accelerated weathering test Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12519 [article]

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Microgel emulsions for low VOC thermosetting industrial coatings / Pradeep T. Gadekar in PAINTINDIA, Vol. XLVII, N° 9 (09/1997)

[article]  inPAINTINDIA > Vol. XLVII, N° 9 (09/1997) . - p. 36-44 Titre : Microgel emulsions for low VOC thermosetting industrial coatings Type de document : texte imprimé Auteurs : Pradeep T. Gadekar, Auteur ; Sandeep. V. Magdum, Auteur Année de publication : 1997 Article en page(s) : p. 36-44 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  eau'  émulsion'  Liant  'Méthacrylate  polymère'  'Acrylate  'Méthacrylique  acide  Microgel Index. décimale : 667.9 Revêtements et enduits Résumé : In the present research work, acrylic microgel emulsions with hydroxyl functionality were developed by using multifunctional monomers i.e. ethylene glycol dimethacrylate (EGDMA) and glycidyl methacrylate (GMA). All these emulsions were characterised and compared with conventional hydroxyl functional acrylic emulsions (plain emulsions). Hexamethoxymethylmelamine (HMMM) was used as an external crosslinker. These emulsions were further used for the development of low Volatile Organic Compounds (VOCs) thermosetting high performance industrial coatings. The results show that the microgel has lots of promises for low VOC thermosetting industrial coatings. Note de contenu : - AN APPROACH TO THE DEVELOPMENT OF HYDROXYL FUNCTIONAL EMULSIONS - EXPERIMENTAL WORK-EMULSIONS - PREPARATION OF PLAIN EMULSIONS - PREPARATION OF MICROGEL EMULSIONS - CHARACTERISATION OF EMULSIONS - EXPERIMENTAL WORK-PREPARATION OF THERMOSETTING COATINGS - PREPARATION OF PRIMER - PREPARATION OF TOP COAT - APPLICATION AND CURING SCHEDULE FOR PRIMER AND TOP COAT - CHARACTERISATION OF PAINTS - Primer and paint properties - Dry film properties - Study on accelerated weathering conditions - RESULTS AND DISCUSSIONS - Characterisation of emulsions - Coating properties of composite system of one coat primer and one coat top coat - Accelerated weathering test of paint composite system based on plain and microgel emulsions - Chemical resistance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13315 [article]

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Starch based polyurethane foam-review / Ravindra V. Gadhave in PAINTINDIA, Vol. LXVIII, N° 9 (09/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 9 (09/2018) . - p. 64-65 Titre : Starch based polyurethane foam-review Type de document : texte imprimé Auteurs : Ravindra V. Gadhave, Auteur ; Prakash A. Mahanwar, Auteur ; Pradeep T. Gadekar Année de publication : 2018 Article en page(s) : p. 64-65 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidons Biodégradation Biopolymères Mousse (chimie) Polyols Polyuréthanes Index. décimale : 667.9 Revêtements et enduits Résumé : Increasing global energy crisis of petroleum resources has shifted focus of chemical industries to look for alternative raw material resources. The main focus of raw materials in polyurethane system, such as polyol i.e. based on petroleum and natural gas, would be gradually replaced by those from renewable sources. Starch is a relatively inexpensive and renewable product from abundant plants natural sources like starch is used during manufacturing of polyurethane (PU) foam extensively from the last decades and replaced petrochemical based PU foam due to their lower environmental few impact, easy availability, lower cost and biodegradability. Starch which is an abundant but underutilized component of cellulosic biomaterials constitutes a rich source of polyol and being considered for the production of bio-degradable PU foam. Lignin was mainly used for production of degradable polyurethane foams, followed by elastomers as well as wood adhesives. For this review paper we will focus on the progress of research in starch based polyurethane materials for foam application. Note de contenu : - INTRODUCTION : Starch - Polyurethane - Polyurethane foams - STARCH BASED POLYURETHANE FOAM En ligne : https://drive.google.com/file/d/1UhUz9WOoHutWcwXCfLoUn37AbHRN8cUc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31442 [article]

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