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High-yield bonds / R. Musch in ADHESIVES AGE, Vol. 44, N° 1 (01/2001)  

[article]  inADHESIVES AGE > Vol. 44, N° 1 (01/2001) . - p. 17-33 Titre : High-yield bonds : New polychloroprenes expand areas of application Type de document : texte imprimé Auteurs : R. Musch, Auteur ; N. Schildan, Auteur ; K. Panskus, Auteur Année de publication : 2001 Article en page(s) : p. 17-33 Langues : Américain (ame) Catégories : Adhésifs en phase aqueuse Bases (chimie) Colles:Adhésifs Isocyanates Polychloroprène Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The unique property profile of polychloroprenes (CR) makes these products indispensable in the field of solventborne contact adhesives for a large number of applications. The performance of the bonds can be significantly improved by crosslinking with isocyanates. Because of mounting ecological requirements and more stringent regulations on occupational health, there is an increasing trend towards the development of solvent-free adhesives based on aqueous alkaline CR dispersions. Here, however, the scope of application is limited as it has not so far been possible to adequately satisfy demands for products for bonding non-absorbent substrates or for high heat resistance. This article describes new CR dispersions with a modified polymer structure that satisfy the increasingly strict ecological requirements on these modern adhesives in line with the "Responsible care" concept. Used in combination with a new dispersible crosslinking isocyanate that is also suitable for strongly alkaline CR adhesive dispersions and produced by a suitable compounding process, these dispersions open up new areas of application that will be illustrated in examples. Note de contenu : - Polymerization - Dispercoll C product range - Use motivation - Resin study - Applications fiels - Furniture - Wood lamination and construction - Automotive,shoe - Test methods En ligne : https://drive.google.com/file/d/1tBkkkwwJIfMNHIj5t2axq4Hv8blsFyUt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19727 [article]

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Paper trail / Honma Shiro in ADHESIVES AGE, Vol. 44, N° 1 (01/2001)  

[article]  inADHESIVES AGE > Vol. 44, N° 1 (01/2001) . - p. 25-29 Titre : Paper trail : Analysing the use of hot-melt adhesives for waste paper recycling Type de document : texte imprimé Auteurs : Honma Shiro, Auteur Année de publication : 2001 Article en page(s) : p. 25-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs thermofusibles Copolymère éthylène acétate de vinyle Papier -- Recyclage Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The destruction of nature caused by excessive exploitation of forest resources has been considered to be a significant issue for a long time. And these days, many counter-plans to prevent global warming have been undertaken in various fields. In Japan, one of the measures for resolving these problems, the "Container Recycling Law," was enacted in 1995. As mentioned above, under the administrative leadership, a lot of effort has been taken to promote recycling in each field. Especially in the recycling of waste paper, such as used newspapers and magazines, where presently more than 50 percent of used papers are recovered and reused effectively, owing to a long-term effort and enthusiasm. However, in order to increase the proportion of the recycled paper to total produced paper, it is necessary to expand the present recycled paper usage that is occupied by paperboard to paper, except paperboard like printing and information paper area where higher quality is required. But in that case, the property of collected waste paper to be recycled becomes highly important because it will essentially affect the qualities of the aforementioned recycled paper usage. For this reason, there is a growing need for improvement in the quality level of recycled paper in proportion to recycle rates. Note de contenu : - Waste paper recycling in Japan - Troubles in recycling - Bookbinding HMAs - Suitability for recycling - Residual HMA in the filter cake (rejects) - Oil spots passing through the screen - Table 1 : Unit requirement of using waste paper classified in usage - Table 2 : Outline of the HMA for bookbindinguse in the experiments - Table 3 : Comparison of the characteristics of HMAs used in the experiments - Table 4 : Bookbinding conditions - Table 5 : Characteristics of books - Table 6 : COD value in the filtrate (Unit : mg/L) - Table 7 : The percentage of residual HMAs - Table 8 : Oil spots passing through the screen (unit g.%) - Table 9 : Summary of results En ligne : https://drive.google.com/file/d/1Qh3N1287_2rParJ0ulXVE8os08KiTx7P/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19732 [article]

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Polyurethanes get a lift / Ralf Guether in ADHESIVES AGE, Vol. 44, N° 1 (01/2001)  

[article]  inADHESIVES AGE > Vol. 44, N° 1 (01/2001) . - p. 31-36 Titre : Polyurethanes get a lift : New technology overcames disadvantages associated with non-sagging polyurethane compositions Type de document : texte imprimé Auteurs : Ralf Guether, Auteur ; Peter. H. Markusch, Auteur ; Robert. L. Cline, Auteur Année de publication : 2001 Article en page(s) : p. 31-36 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colles:Adhésifs Composés de moulage en feuille Polyuréthanes Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Non-sagging behavior is an essential property for polyurethane and adhesive formulations that are applied onto vertical surfaces. Traditionally, the non-sag property is achieved through additives that control theological properties of a paint or adhesive. For warerborne polymers such as latex paints, rheology modifiers include hydroxyerhyl-cellulose, hydrophobically modified alkali-soluble emulsions and hydrophobically modified ethylene oxide urethanes (associative thickeners). Solvent-based polymers, such as alkyd paints, typically use castor oil derivatives, attapulgite or bentonite clays or fumed silica. Bayer Corp. has developed a non-sagging polyurethane technology that overcomes disadvantages associated with these filled systems. This technology involves the reaction of a liquid polyisocyanate with polyhydroxy compounds and an aliphatic or aromatic amine. The amines may be added to the reaction in an amount sufficient to produce adequate resistance to flow/sag upon mixing of the reactants. Hence, when a bead of polyurethane is applied to a vertical surface, it does not run, drip or sag. Due to the almost immediate reaction of the amine component with the isocyanate, an initial build-up in molecular weight produces the desired non-sagging behavior. The system remains in this "B-stage" for a controllable amount of time before the hydroxy/isocyanate reaction rakes place and the system cures to a solid polyurethane. This article describes the basic principles of non-sagging polyurethane compositions as well as a wide variety of applications for this technology. Applications for non-sagging polyurethanes include structural adhesives for SMC, expandable caulkings and sealants, furniture edging, carpet seam sealants, and flexible, sandable patching compounds. Note de contenu : - Amine-terminated polyethers - TDI prepolymer hydrolysis - Aminocrotonate process - Mesylate process - Chloronitrobenzene process - Structural adhesives for SMC - Expandable caulkings & Sealants - Furniture edging - Seam sealants - Sandable patching compounds - Fig. 1 : Polyurea formation - Fig. 2 : Typical amines - Fig. 3 : Synthesis of ATPEs En ligne : https://drive.google.com/file/d/1a2zAvnMyI9PdJCe052wKyaGBXnam7GeM/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19733 [article]

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