[article]
| Titre : |
Study of formulation variables of thermoplastic reflecting materials for traffic marking |
| Type de document : |
texte imprimé |
| Auteurs : |
Alberto C. Aznar, Auteur ; Juan J. Caprari, Auteur ; Jorge F. Meda, Auteur ; Oscar Slutzky, Auteur |
| Année de publication : |
1997 |
| Article en page(s) : |
p. 33-38 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Adhésion
Couches minces
Dureté (matériaux)
Humidité -- Absorption
Marquage routier (peinture)
Plastification
Réflectance
Résistance à l'abrasion
Revêtements
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Signaux et signalisation
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Nine formulations of thermoplastic materials for traffic marking were prepared using a resin based on maleic anhydride modified with rosin in different proportions (18, 22, and 26%). A liquid coconut long oil alkyd resin (100% solids) was employed as a plasticizer.Titanium dioxide was used as a hiding pigment while calcium carbonate and micronized talc were used as extenders. Coarse marble powder facilitated the incorporation of glass beads. The operation was made by employing a double Z mixer heated with oil to obtain a mass temperature of 180-190°C. The mixer was equipped with two asynchronous arms rotating at 46 rpm.Dry and wet abrasion tests were carried out and the results obtained indicated that wearing values are three times greater in the case wet test.It is demonstrated that plasticization degree controls hardness variation as a function of temperature; therefore, a critical point, which is the beginning of an abrupt reduction of hardness, is determined. Water absorption increases when the plasticizer content increases. A matrix correlation of tests results was used to analyze the obtained numeric values. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18234 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 868 (05/1997) . - p. 33-38
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