| Titre : |
A bifunctional stabilization system for hot melt adhesives |
| Type de document : |
texte imprimé |
| Auteurs : |
Neal J. Earhart, Auteur ; Douglas Horsey, Auteur |
| Année de publication : |
1994 |
| Article en page(s) : |
p. 28-31 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Adhésifs -- Détérioration
Adhésifs thermofusibles
Antioxydants
Copolymère éthylène acétate de vinyle
Hydrolyse
Oxydation thermique
PhosphiteL'ion phosphite (HPO32−) est un ion polyatomique avec un atome central de phosphore. Sa géométrie est pyramidale trigonale. De nombreux sels de phosphite, tels le phosphite d'ammonium, sont hautement solubles dans l'eau. Le terme « phosphite » est parfois employé pour désigner l'ester de phosphite, composé organophosphoré de formule P(OR)3
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Based on primary/secondary antioxidants, the system offers improved performance over conventional stabilization systems in ethylene-vinyl acetate/hydrocabon tackifier hot melt adhesive formulations.
Hot melt adhesive (HMA) formulations can include antioxidants to inhibit the negative effects of thermally induced oxidation on the physical properties of the adhesive, such as discoloration and changes in viscosity. In addition, degradation not only affects the quality of the adhesive but can also affect processing. Skin formation, which occurs at the interface between the HMA and the atmosphere, can cause equipment fouling during mixing and application. Viscosity changes in the HMA can lead to flow control and application problems. Resistance to discoloration is critical, especially in premium applications. Ethylene-vinyl acetate (EVA)/hydrocarbon (HC) tackifier-based HMAs often are used in applications where color is important. Depending on the hydrocarbon tackifier selected, an EVA/HCbased HMA formulation can have an initial Gardner color number of 1 or less. Retention of initial color during compounding, application and service life of the HMA is desirable. |
| Note de contenu : |
- Thermal oxidation and degradation
- Antioxidants
- Hydrolysis of phosphites |
| En ligne : |
https://drive.google.com/file/d/1YYpY7A3f9FfE0Mobvx9JA_lTTjanVouQ/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20804 |
in ADHESIVES AGE > Vol. 37, N° 1 (02/1994) . - p. 28-31
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