Maleic anhydride copolymer was synthesized and reacted with mono functional alcohols. The reaction was slower than between monomeric anhydride and alcohol because of the polymer effect. Under heating, recyclization of the half ester to anhydride occured. This was examined with reference to the structure of alcohols as well as types of catalysts. The maximum recyclization ratio obtained was as high as 84 %, while that of copolymers produced with maleic anhydride monoalkylester was very low. A trans structure ist formed through free rotation at the terminal of the propagating polymer radical in the latter polymer and this hardly recyclizised. A clear coat obtained by combination of a half ester copolymer and a copolymer containing both hydroxyl and oxirane groups showed excellent acidic water resistance. These findings have been full developed for the formulation of a 1-package acid rain resistance finish.
New resin systems for high performance top coats
Neue Kunstharzsysteme für Hochleistungs-Deckanstriche
Progress in Organic Coatings. An International Journal ; 26 , 2-4 ; 197-205
1995
9 Seiten, 3 Bilder, 7 Tabellen, 10 Quellen
Aufsatz (Zeitschrift)
Englisch
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