Binder compositions for making fiberglass products

A fiberglass mat, comprising:

• a plurality of glass fibers and an at least partially cured binder composition, wherein the binder composition, prior to at least partial curing, is a thermosetting composition and comprises:
• a first copolymer modified by reaction with one or more base compounds, wherein:
• the first copolymer comprises one or more vinyl aromatic derived units and (1) one or more unsaturated carboxylic acids, (2) one or more unsaturated carboxylic anhydrides, or (3) one or more unsaturated carboxylic acids and one or more unsaturated carboxylic anhydrides,
• the one or more base compounds comprise ammonia, monoethanolamine, diethanolamine, triethanolamine, or any combination thereof,
• the first copolymer has a weight average molecular weight (Mw) of about 500 to about 200,000, and
• the first copolymer is present in an amount ranging from about 60 wt % to about 95 wt %, based on a combined weight of the first copolymer and the one or more base compounds.