Appeal No. 2001-0131
Application No. 08/977,110
[recycled] plastics is polyolefin with minor amounts of
polystyrene, polyester and poly(vinyl chloride)” (claim 26) and
to a process for the stabilization of such a mixture of recycled
plastics. Further details of this appealed subject matter are
recited in representative claim 26 reproduced below:
26. A stabilizer mixture, suitable for the
stabilization of a mixture of recycled plastics
obtained from domestic, commercial and industrial
waste or from recycled material collections, which
mixture of plastics is polyolefin with minor amounts
of polystyrene, polyester and poly(vinyl chloride),
which comprises per 100 parts (by weight)
(A) as component a) 5-50 parts of the
pentaerythrityl ester of β-(3,5-di-tert-butyl-4-
hydroxy-phenyl)propionic acid, as component b) 5-50
parts of tris-(2,4-di-tert-butylphenyl)phosphite and
as component c) 5-90 parts of calcium oxide;
(B) as component a) 5-50 parts of octadecyl ester
of β-(3,5-di-tert-butyl-4-hydroxy-phenyl)propionic
acid, as component b) 5-50 parts of tris-(2,4-di-tert-
butylphenyl)phosphite and as component c) 5-90 parts
of calcium oxide;
(C) as component a) 5-50 parts of 2,2’-ethyliden-
bis-(4,6-di-tert-butylphenol), as component b) 5-50
parts of tris-(2,4-di-tert-butylphenyl)phosphite and
as component c) 5-90 parts of calcium oxide;
(D) as component a) 10-30 parts of the octadecyl
ester of β-(3,5-di-tert-butyl-4-hydroxy-
phenyl)propionic acid, as component b) 10-30 parts of
tris-(2,4-di-tert-butylphenyl)phosphite and as
component c) 30-70 parts of calcium oxide; or
(E) as component a) 5-30 parts of the octadecyl
ester of β-(3,5-di-tert-butyl-4-hydroxy-
phenyl)propionic acid, as component b) 5-30 parts of
tris-(2,4-di-tert-butylphenyl)phosphite, as component
2
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