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CNSL-derived polymers for use in surface coatings / K. S. Shukla in PAINTINDIA, Vol. LII, N° 2 (02/2002)

[article]  inPAINTINDIA > Vol. LII, N° 2 (02/2002) . - p. 29-32 Titre : CNSL-derived polymers for use in surface coatings Type de document : texte imprimé Auteurs : K. S. Shukla, Auteur ; S. Prasad, Auteur ; Pramod Kumar, Auteur ; Deepak Srivastava, Auteur Année de publication : 2002 Article en page(s) : p. 29-32 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Cashew Nut Shell Liquid (CNSL), a by-product of the cashew industry, is one of the potential natural sources of phenols/monomers for the synthesis of a variety resins/polymers for use in surface coatings. CNSL, a dark-coloured product, is obtained from the shell of cashew nut. Cashew tree, Anacardium Accidentale Linn, of Brazil origin, is now being grown extensively in India also. In the present paper, extraction and refining of CNSL has been briefly outlined to get a technically useful product. The chemistry of CNSL and its components has been discussed along with the polymerization of CNSL. Possible modifications of CNSL have been considered to yield useful film-formers for surface coatings of improved technical utility. CNSL-aldehyde resins have been found to be superior to ordinary phenol-aldehyde resins when used in surface coatings, and as insulating materials. The important polymeric materials which have been developed by using CNSL as one of the constituents or a modifier, such as CNSL-aldehyde condensation products, CNSL-modified phenolic resins, polyesters, epoxies and polyurethanes, have been elaborated. Both solvent-borne and waterborne coating formulations have been discussed. Water-dispersible and water-soluble resins with their preparation and properties have been covered in this paper with the purpose to draw guidelines for the designing of ecofriendly polymeric film-formers for surface coatings. Note de contenu : - Extraction of CNSL - Refining - Chemistry of CNSL and its components - Polymerization of CNSL - CNSL-aldehyde condensation products - Epoxy resins - Miscellaneous coating materials - Water-borne coatings Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12302 [article]

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A review on blocked isocyanates in coatings / S. Subramani in PAINTINDIA, Vol. LII, N° 2 (02/2002)

[article]  inPAINTINDIA > Vol. LII, N° 2 (02/2002) . - p. 33-44 Titre : A review on blocked isocyanates in coatings Type de document : texte imprimé Auteurs : S. Subramani, Auteur Année de publication : 2002 Article en page(s) : p. 33-44 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The preparation of many coatings, foams and elastomers involves a rapid crosslinking reaction between isocyanates and hydroxy functional resins. Because the isocyanate functionality is highly reactive, it must be isolated from the functional resin prior to use. The desirability of one-pack systems for many end use applications has led to the development of blocked isocyanate materials. Blocked polyisocyanates have picked up with technical progress in the coatings field and are promising a bright future. They should be considered as an integral part of polyurethane coatings technology. Note de contenu : - General properties of polyurethane coatings - Polyurethane coating raw material - Technical advantage of blocked isocyanates - Blocking agents - Phenol blocked polyisocyanates - Alcohols - Caprolactam blocked polyisocyanates - β-dicarbonyl blocking agents : Malonates and acetoacetates - Bisulfite blocked polyisocyanates - Formation and hydrolysis of bisulfite blocked isocyanates - Oxime blocked polyisocyanates - Cationic electrodeposition - Hydroxamic acid esters - Triazoles - Heterocyclic ring opening reactions - Applications and limitations of blocked isocyanates Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12303 [article]

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High concentrated wax dispersions / Oliver Krull in PAINTINDIA, Vol. LII, N° 2 (02/2002)

[article]  inPAINTINDIA > Vol. LII, N° 2 (02/2002) . - p. 45-47 Titre : High concentrated wax dispersions Type de document : texte imprimé Auteurs : Oliver Krull, Auteur Année de publication : 2002 Article en page(s) : p. 45-47 Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Wax dispersions are now available which are pumpable at a solid content between 45% and 69%. This allows incorporation time to be reduced by up to 85% compared with micronized waxes. High concentrated wax dispersions can be added post production allowing easy surface modification. They are especially suited for high solids coating systems as these wax dispersions contain more active content than conventional ones. Note de contenu : - Waxes and coatings - The action of wax in a coating - The new generation of wax dispersions : Easy handling and incorporation - Effective matting properties and economy - Homogeneous distribution in the system - Reduced production time - Yield point evident: lower than the 15% wax precipitation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12316 [article]

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Solid solution azo pigments / N. Sekar in PAINTINDIA, Vol. LII, N° 2 (02/2002)

[article]  inPAINTINDIA > Vol. LII, N° 2 (02/2002) . - p. 48-50 Titre : Solid solution azo pigments Type de document : texte imprimé Auteurs : N. Sekar, Auteur Année de publication : 2002 Article en page(s) : p. 48-50 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants azoïques Distillation Index. décimale : 667.2 Colorants et pigments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12317 [article]

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Eco-friendly powder coatings (paints) - the fast track finishing process of the millennium / K. K. Deodhar in PAINTINDIA, Vol. LII, N° 2 (02/2002)

[article]  inPAINTINDIA > Vol. LII, N° 2 (02/2002) . - p. 51-54 Titre : Eco-friendly powder coatings (paints) - the fast track finishing process of the millennium Type de document : texte imprimé Auteurs : K. K. Deodhar, Auteur Année de publication : 2002 Article en page(s) : p. 51-54 Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Note de contenu : - Early development - What are powder coatings - Powder generic types : Epoxy pure - Epoxy-polyester - Pure polyester - Polyester-urethane - Acrylic-urethane - Powder coatings - potentials markets - Economics - The quality connection - Metal treatment - Powder coating application : Major powder handling characteristics - Supplier service - Cost - Economic factors - True cost - Plant design and maintenance : Correct operation - New developments in powder coatings - Concluding remarks Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12318 [article]

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Radiation cured powder coatings in PAINTINDIA, Vol. LII, N° 2 (02/2002)

[article]  inPAINTINDIA > Vol. LII, N° 2 (02/2002) . - p. 55-56 Titre : Radiation cured powder coatings Type de document : texte imprimé Année de publication : 2002 Article en page(s) : p. 55-56 Langues : Anglais (eng) Catégories : Peinture poudre -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12319 [article]

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New developments in waterborne printing inks for non-absorbing substrates / Anton de Krom in PAINTINDIA, Vol. LII, N° 2 (02/2002)

[article]  inPAINTINDIA > Vol. LII, N° 2 (02/2002) . - p. 57-68 Titre : New developments in waterborne printing inks for non-absorbing substrates : Self-crosslinking acrylic dispersions outperform conventional solventborne liquid inks Type de document : texte imprimé Auteurs : Anton de Krom, Auteur ; Henk Mulder, Auteur ; Dirk Mestach, Auteur Année de publication : 2002 Article en page(s) : p. 57-68 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Over the past decade environmental and health considerations have resulted in the development of inks with lower volatile organic compound (VOC) content. Novel waterborne self-crosslinking and storage stable polymers for environmentally friendly printing inks and overprint varnishes have been developed by Akzo Nobel Resins. These polymers, which are supplied as waterborne acrylic emulsions, form crosslinked films upon drying at ambient temperatures. The acrylic emulsions are based on proprietary keto-functional polymers that can be conveniently made via multi-stage emulsions polymerization. They are especially useful in applications onto non-absorbing substrates (NAS), where they offer fast dry combined with good adhesion, gloss, solvent resistance, cold and hot water resistance and resolubility. Completely solvent-free ink formulations based on AD1, AD2 EPD and grinding resin ADG are given. Key properties of the printing inks are discussed and compared with other waterborne and solventborne printing inks. Note de contenu : - Chemistry - Applicationof keto-hydrazide crosslinking to ink binders - Experimental : Solvent-free ink preparation - Ink application - Print testing : Gloss - drying - Resolubility - Adhesion - Heat seal resistance - SATRA rub resistance - Wet wrinkle - Solvent resistance (DIN 16524) - Application of the new self-crosslinking dispersion in inks for printing non-absorbing substrates - Performance comparisons between inks based on the new self-crosslinking dispersions and commercially available liquid inks - Stability (viscosity) - Drying versus resolubility - Gloss - Resistance properties - Heat seal resistance and adhesion Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12320 [article]

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