Patent ID: 8114519

Claim:
A derivatized solid epoxy resin of formula (I) where each R′ and R″ is independently H or CH 3 ; each X is independently H or a moiety of formula (II) where R 1 is a structural portion of a linear or branched polyurethane prepolymer PU1 terminated by an uncapped isocyanate group and (m+q) capped isocyanate groups, excluding the terminal uncapped and capped isocyanate groups; each R 2 is independently a capping group which cleaves at a temperature above 100° C.; R 4 is a structural portion of a monohydroxyl epoxy compound having p epoxy groups and a single primary or secondary hydroxyl group, excluding the epoxy groups and the primary or secondary hydroxyl group, wherein R 4 is structurally aliphatic, cycloaliphatic, aromatic, or araliphatic; p=1, 2, or 3; m≧0, and q ≧0, with the condition that 1 ≦(m+q) ≦8; s is a value from 2 to 12; wherein at least one X in formula (I) is a moiety of formula (II).