Crystalline characters of modified hyperbranched polyester

To obtain a new kind of resin for practical UV curable powder coating syste ms, hyperbranched polyester, Boltorn (TM) H20, was modified with octadecyl isocyanate (or palmitoyl chloride) and acryloyl chloride, thus resulting in an UV curable resins with crystalline molecular shell and amorphous interi or. The high melting point (T-m) can be resulted largely by the crystalline area of the crystallizable moieties. The degree of crystallinity is higher with more crystallizable moieties. As a result, T-m of the resin modified with octadecyl isocyanate is higher than that of one modified with palmitoy l chloride. The hyperbranched polyester Boltorn (TM) H20 modified with octa decyl isocyanate maybe used for powder coating systems.