Appeal No. 1998-3115
Application No. 08/384,520
1. A thermoplastic composition comprising:
(A) from 1 to 99% by weight of an amorphous
propylene polymer having the following
characteristics:
(i) intrinsic viscosity greater than 1 dl/g;
(ii) percentage of syndiotactic diads (r) minus
percentage of isotactic diads (m) greater than
0;
(iii) less than 2% of the CH groups contained
2
in the sequences (CH ) with n greater than or
2 n’
equal to 2;
(iv) Bernouillianity index (B)=1± 0.2;
(v) melting enthalpy value lower than 10 J/g;
and
(vi) a ratio of M /M lower than 4; and
w n
(B) from 1 to 99% by weight of a component B havingII
the following composition:
(a) 10-50% by weight of at least one polymer
selected from the group consisting of propylene
homopolymers having an isotactic index higher
than 80, and copolymers of propylene with at
least one comonomer selected from ethylene and
the "-olefins of formula CH =CHR where R is an
2
alkyl radical containing from 2 to 8 carbons
atoms, said copolymer containing at least 85% by
weight of units deriving from propylene,
(b) 0-20% by weight of a copolymer containing
ethylene, insoluble in xylene at room
temperature, and
(C) 40-80% by weight of a copolymer containing
10-40% by weight of units deriving from
ethylene, 90-60% by weight of units deriving
from at least one comonomer selected from the
group consisting of propylene and the "-olefins
of formula CH =CHR wherein R is an alkyl radical
2
containing from 2 to 8 carbons atoms, and 0-5%
of units deriving from a diene, said copolymer
being soluble in xylene at room temperature and
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 Next
Last modified: November 3, 2007