DETAILED DESCRIPTION OF THE INVENTION Polycarbonate Resin Aromatic polycarbonate resins suitable for use in the present invention, methods of making polycarbonate resins and the use of polycarbonate resins in thermoplastic molding compounds are well known in the art, see, generally, U.
S.
Pat.
Nos.
3,169,121, 4,487,896 and 5,411,999, the respective disclosures of which are each incorporated herein by reference.
Aromatic polycarbonate resins are, in general, prepared by reacting a dihydric phenol, e.
g.
, 2,2-bis-(4-hydroxyphenyl) propane ("bisphenol A"), 2,2-bis(3,5-dimethyl4-hydroxyphenyl)propane, bis(2-hydroxyphenyl) methane, 2,6-dihydroxy naphthalene, hydroquinone, 2,4'-dihydroxyphenyl sulfone and 4,4'-dihydroxy-3,3-dichlorophenyl ether, with a carbonate precursor, e.
g.
, carbonyl bromide and carbonyl chloride, a halogen formate, a bishaloformate of a dihydric phenol or a carbonate ester, e.
g.
, diphenyl carbonate, dichlorophenyl carbonate, dinaphthyl carbonate, phenyl tolyl carbonate and ditolyl carbonate.
In a preferred embodiment, the aromatic polycarbonate resin comprises one or more resins selected from linear aromatic polycarbonate resins, branched aromatic polycarbonate resins and poly(ester-carbonate) resins.
Suitable linear aromatic polycarbonates resins include, e.
g.
, bisphenol A polycarbonate resin.
Suitable branched aromatic polycarbonates are made, e.
g.
, by reacting a polyfunctional aromatic compound, e.
g.
, trimellitic anhydride, trimellitic acid, trimesic acid, trihydroxy phenyl ethane or trimellityl trichloride, with a dihydric phenol and a carbonate precursor to form a branching polymer.
Suitable poly(ester-carbonate) copolymers are made, e.
g.
, by reacting a difunctional carboxylic acid, terephthalic acid, 2,6-naphthalic acid, or a derivative of a difunctional carboxylic acid, e.
g.
, an acid chloride, with a dihydric phenol and a carbonate precursor.
In a preferred embodiment, the polycarbonate resin has an intrinsic viscosity of about 0.
3 to about 1.
5 deciliters per gram in methylene chloride at 25
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Nonmetallic Processes 
