Patent ID: 7642316

Claim:
A film having a total thickness of up to about 0.25 mm produced from a rubber modified monovinylidene aromatic polymer composition comprising: a) a monovinylidene aromatic polymer matrix; b) from about 1.5 to about 8 percent by weight rubber (based on total diene content in the composition) dispersed as crosslinked rubber particles having primarily a core/shell morphology and a volume average particle size of from about 0.1 to about 1.5 microns; where from about 40 to about 90 volume percent of the rubber particles have diameters of less than about 0.4 microns and from about 10 to about 60 volume percent of the rubber particles have diameters between about 0.4 and about 2.5 microns and the rubber is a blend comprising a conjugated diene block copolymer rubber comprising from about 15 to about 60 percent by weight monovinylidene aromatic monomer block with from about 2 to about 25 weight percent of conjugated diene homopolymer rubber based on the total weight of rubber in the composition; and c) optionally from 0.1 to 4 weight percent mineral oil.