Process for the preparation of glycoside-containing polyester resin

Abstract

An improved process is provided for the manufacture of polyester or alkyd resin materials via the reaction of a polybasic acid or anhydride component with a polyol component containing at least a minor proportion of an alkyl, alkenyl or aryl glycoside or polyglycoside material. In the improved process, the reaction temperature is maintained below about 185.degree. C. until the reaction has reached at least about 50 percent of completion. In an especially preferred embodiment, the polyester or alkyd resin to be produced is an aromatic polybasic acid or anhydride-based, glycoside-containing material and the improved process of the invention further comprises substituting an aliphatic polybasic acid or anhydride material for a minor proportion of the aromatic polybasic acid or anhydride component thereof. The improved process of the present invention provides alkyl, alkenyl or aryl glycoside-containing polyester or alkyd resins having substantially better color (i.e., reduced color development) relative to that characteristically exhibited by comparable polyester or alkyd resin products prepared via conventional polyester or alkyd resin manufacturing processes or techniques.