● Patent No. U.S. 6,337,137 B1
DSM N.V., Heerlen, The
Netherlands, has patented a powder
coatings binder. It is comprised of a
functional endomethylene tetrahydrophthalic
acid units; a crosslinker
wherein the polymer is obtained by
preparing an unsaturated polymer,
and subsequently reacting the unsaturated
polymer with cyclopentadiene
at a temperature between 160°C and
220°C.