Appeal No. 2003-0130
Application 08/950,187
Claim 1 is illustrative of the subject matter on appeal and
is set forth below:
1. A propylenic copolymer (A) of propylene and ethylene,
that satisfies the following conditions (1) to (5):
(1) The ethylene unit content (xa, wt.%) of the copolymer
is from 3 to 10 wt.%;
(2) The relation between the boiling diethyl ether
extraction (Ea, wt.%) of the copolymer and xa satisfies the
formulae (I) or (II):
Ea = 0.25xa + 1.1 (xa = 3 to 6 wt.%) (I)
Ea = 2.6 (xa = 6 to 10 wt.%); (II)
(3) The relation between the melting point (Tma, °C) of the
copolymer as measured with a differential scanning calorimeter
and xa satisfies the formulae (III) or (IV):
Tma = 140 (xa = 3 to 4 wt.%) (III)
Tma = 160 – 5xa (xa = 4 to 10 wt.%); (IV)
(4) The copolymer has a melt index (MI, g/10 min.) of from
4 to 12 g/10 min., measured at a temperature of 230°C under a
load of 2160 g, according to JIS K7210; and
(5) The isotactic triad fraction in the PPP sequence of the
copolymer, as measured in 13C-NMR, is not smaller than 98.0 mol%.
The examiner relies upon the following references as
evidence of unpatentability:
Ishimaru et al. (Ishimaru) 5,438,110 Aug. 1, 1995
Twu et al. (Twu)(EPA) 0 341 724 Nov. 15, 1989
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