Appeal 2007-3191
Application 10/482,217
5) Liao states that:
In the thermoplastic compositions which contain a
polyester and a polycarbonate resin, it is preferable
to use a stabilizer material. Typically, such
stabilizers are used at a level of 0.01-10 weight
percent and preferably at a level of from 0.05-2
weight percent. The preferred stabilizers include
an effective amount of an acidic phosphate salt; an
acid, alkyl, aryl or mixed phosphite having at least
one hydrogen or alkyl group; a Group IB or Group
IIB metal phosphate salt; a phosphorus oxo acid, a
metal acid pyrophosphate or a mixture thereof.
(Liao, col. 9, l. 59-col. 10, l. 1.)
6) Liao discloses that:
The suitability of a particular compound for use as
a stabilizer and the determination of how much is
to be used as a stabilizer may be readily
determined by preparing a mixture of the polyester
component, the polycarbonate with and without
the particular compound and determining the effect
on melt viscosity or color stability or the formation
of interpolymer. The acidic phosphate salts include
sodium dihydrogen phosphate, mono zinc
phosphate, potassium hydrogen phosphate,
calcium hydrogen phosphate and the like.
(Liao, col. 10, ll. 1-10.)
7) Liao discloses that the molding compositions of the invention may
contain polytetrafluoroethylene (PTFE) type resins or copolymers used
to reduce dripping in flame retardant thermoplastics. Preferably other
ingredients are employed in low amounts, typically less than 5 percent
by weight of the total composition, and include stabilizers, mold release,
lubricants, colorants, nucleants, antioxidants and UV absorbers (Liao,
col. 11, ll. 13-19).
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