Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2005-03-15
2005-03-15
Lee, Rip A. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S584000, C525S240000
Reexamination Certificate
active
06867252
ABSTRACT:
A propylene-based resin composition has good external appearance due to good weld appearance and low gloss and has excellent mechanical properties such as impact resistance and stiffness. The composition is well-balanced in the external appearance and mechanical properties. Automotive interior trims made of the composition are also described. The propylene-based resin composition comprises (A) 60 to 90% by weight of a propylene-based resin (1) comprising 78 to 88% by weight of 23° C. p-xylene insolubles (a) and 12 to 22% by weight of 23° C. p-xylene solubles (b), (2) the insolubles (a) having an isotactic pentad fraction of 95% or higher, a relaxation time (τ) of 0.01 to 0.35 second at an angular frequency (ω) of 10°/sec when measured by melt viscoelastometry and a molecular weight distribution index (PDI) of 1 to 18 which is expressed by ω2/10ω1wherein ω1is an angular frequency at which a storage modulus (G′) as measured by melt viscoelastometry is 2×102Pa and ω2is an angular frequency at which a storage modulus (G′) as measured by melt viscoelastometry is 2×104Pa, and (3) the solubles (b) having an intrinsic viscosity [η] (in decalin at 135° C.) of 3.3 dl/g or higher and an ethylene unit content of 43% by weight or smaller; (B) 0 to 10% by weight of a rubberlike elastomer; and (C) 10 to 30% by weight of tale. The automotive interior trims are produced by injection-molding the composition.
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Matsuo Youichi
Narukawa Naoki
Oda Tetsuya
Tomomatsu Ryuzo
Yamada Tetsushi
Idemitsu Petrochemical Co. Ltd.
Lee Rip A.
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