| abstract |
An unsaturated polyester suitable as a binder which comprises a reaction product of n (A) an acid component comprising one or a mixture of α,β-mono-olefinically unsaturated dicarboxylic acids or polycarboxylic acids free from polymerizable carbon-carbon multiple bonds or functional derivatives thereof, n (B) a polyhydric alcohol, n (C) a polycyclic compound containing a norbornane ring system and having one or more identical substituents selected from carboxyl, hydroxy and amino groups, and n (D) an acrylic compound which is capable of condensing with at least one of components (A) to (C), i.e. a hydroxyalkyl ester of acrylic or methacrylic acid having up to 3 carbon atoms in the hydroxyalkyl groups, or -alkylol-acryl- or methacrylamides containing up to 4 carbon atoms in the alkylol group or mixtures thereof and a process of their preparation. |