Abstract: An oligoester composition which is a reaction product of a reactant mixture comprising one or more rosins; at least 15% by weight of one or more monocarboxylic acids; and one or more polyhydric alcohols. A method for preparing an oligoester composition comprising (a) esterifying a mixture comprising one or more rosins, one or more monocarboxylic acids, and optionally one or more polycarboxylic acids with one or more polyhydric alcohols to form the oligoester composition. An oligoester composition which is an esterification reaction product of one or more rosins, one or more monocarboxylic acids, one or more polyhydric alcohols, and optionally one or more polycarboxylic acids, wherein the composition has a weight average molecular weight of from 500 g/mol to 8,000 g/mol and a Tg of between ?80° C. and 100° C.

Abstract: Disclosed are compositions which include an ethylene polymer derived from at least one polar monomer with one or more ester groups, which polymerize with ethylene, (e.g., a copolymer derived from ethylene and vinyl acetate or a copolymer derived from ethylene and n-butyl acrylate) and a rosin ester. The rosin ester can have a low hydroxyl number (e.g., a hydroxyl number six or five or less), a low acid number (e.g., an acid number of ten or less), a low PAN number (e.g., a PAN number of eight or less), or combinations thereof. The compositions can exhibit improved viscosity stability and/or color stability and/or a decreased amount of char particle formation upon thermal aging.