| abstract |
The present invention provides an aromatic acid, a salt of an aromatic acid, anhydride of an aromatic acid, or mixtures thereof in which at least 50 percent of the carbon atoms are in aromatic rings and which have a melting point above about 100 DEG C. as a plasticizer for polyvinyl aromatic polymers which are functionalized by grafting salt functional groups onto the polyvinyl aromatic blocks. When such a polymer is plasticized with the aromatic acid, salt of an aromatic acid or anhydride of an aromatic acid of this invention, the polymer retains excellent high temperature physical properties. |