ADHESIVES

摘要

There are disclosed star shaped thermoplastic elastomers made of acrylic blo ck copolymers obtained by transition metal catalysed radical polymerisation. Th e elastomers comprise core arms obtained from monomers or mixture of monomers, whose Tg is from about -65~C to about -20~C, and of shell arms obtained from monomers or mixture of monomers, whose Tg is from about 70~C to about 160~C. The core copolymer has a polydispersity of 2 or higher and the final copolym er has a polydispersity of from 3 to 10.