Appeal No. 1996-3799
Application No. 08/252,511
1. A melt blend stabilizer composition
exhibiting enhanced hydrolytic stability comprising:
(A) a phosphorous compound selected from the
group consisting of phosphites and phosphonites,
said phosphorous compound being present at a level
of from 10 percent by weight to 90 percent by weight
based on the total weight of the stabilizer
composition,
(B) a hindered phenolic isocyanurate present at
a level of from 10 percent by weight to 90 percent
by weight based on the total weight of the
composition, and
(C) less than about 10 percent by weight
additional materials.
12. A method for making a stabilizer
composition exhibiting enhanced hydrolytic
stability, said method comprising:
(a) melt blending a phosphorous compound and a
hindered phenolic isocyanurate; said composition
comprising from 10 to 90 weight percent of said
phosphorous compound and from 10 to 90 weight
percent of said hindered phenolic isocyanurate based
on the total weight of the composition.
The subject matter on appeal relates to a melt blend
stabilizer composition comprising, in the recited amounts, (A)
a phosphite or phosphonite, (B) a hindered phenolic
isocyanurate, and (C) additional materials and to a method for
making a stabilizer composition. According to the appellant,
the claimed composition exhibits improved hydrolytic
stability. (Substitute appeal brief, page 2.)
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