Patent ID: 7736727

Claim:
An electrically insulating film, comprising: about 60 to about 93 weight percent of a poly(arylene ether); about 3 to about 15 weight percent of a hydrogenated block copolymer of an alkenyl aromatic compound and a conjugated diene; wherein the hydrogenated block copolymer has a weight average molecular weight of about 200,000 to about 400,000 atomic mass units; and about 4 to about 15 weight percent of a triaryl phosphate; wherein the electrically insulating film is halogen-free; wherein the electrically insulating film has a thickness of about 50 to about 1050 micrometers; and wherein the electrically insulating film exhibits a flammability rating of VTM-0 measured according to according to the UL 94 Thin Material Vertical Burning Test at a thickness of 51 micrometers, a flammability rating of V-0 measured according to the UL 94 Vertical Burning Test at a thickness of 254 micrometers, a glass transition temperature greater than or equal to 100° C., and a breakdown voltage greater than or equal to 14,000 volts measured at 23° C. in oil at a thickness of 254 micrometers according to ASTM D149.