US6034165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propylene resin composition and automobile trim member
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1997-06-19
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Granted: 2000-03-07
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Expires: 2017-06-19
Abstract
Abstract A propylene-based resin composition comprising (A) from 42 to 95% by weight of a propylene-based resin having an isotactic pentad fraction of at least 95%, (B) from 1 to 10% by weight of an ethylene-C 3 -C 18 α-olefin copolymer having a density of from 0.850 to 0.875 g/cm 3 and a melt index of from 0.01 to 25 g/10 min, and prepared in the presence of a metallocene catalyst, (C) from 2 to 18% by weight of a high-density polyethylene having a density of from 0.93 to 0.97 g/cm 3 and a melt index of from 0.5 to 10 g/10 min, and (D) from 2 to 35% by weight of talc, the total of the components (B) and (C) being from 3 to 23% by weight.
Inventors
- 👤 Ryuzou Tomomatsu
- 👤 Toshiyuki Ishii
- 👤 Satoru Ohnishi
- 👤 Toshihide Nara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:12
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08K; C08K3/00; C08K3/34; C08L23/04; C08L23/06; C08L23/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
125 words
A propylene-based resin composition comprising (A) from 42 to 95% by weight of a propylene-based resin having an isotactic pentad fraction of at least 95%, (B) from 1 to 10% by weight of an ethylene-C 3-18 α-olefin copolymer having a density of from 0.850 to 0.875 g/cm 3 and a melt index of from 0.01 to 25 g/10 min, and prepared in the presence of a metallocene catalyst, (C) from 2 to 18% by weight of a high-density polyethylene having a density of from 0.93 to 0.97 g/cm 3 and a melt index of from 0.5 to 10 g/10 min, and (D) from 2 to 35% by weight of talc, the total of the components (B) and (C) being from 3 to 23% by weight.
Claim 2
Dependent Claim
125 words
A propylene-based resin composition comprising (A) from 42 to 95% by weight of a propylene-based resin having an isotactic pentad fraction of at least 95%, (B) from 1 to 10% by weight of an ethylene-C 3-18 α-olefin copolymer having a density of from 0.850 to 0.875 g/cm 3 and a melt index of from 0.01 to 25 g/10 min, and prepared in the presence of a metallocene catalyst, (C) from 2 to 18% by weight of a high-density polyethylene having a density of from 0.93 to 0.97 g/cm 3 and a melt index of from 0.5 to 10 g/10 min, and (D) from 2 to 35% by weight of talc, the total of the components (B) and (C) being from 3 to 23% by weight.
Claim 3
Dependent Claim
181 words
The propylene-based resin composition as claimed in claim 1, wherein the component (A) satisfies the following requirements (1) to (4): (1) The propylene-based resin of (A) comprises (a) from 70 to 98% by weight of a fragment insoluble in para-xylene at 23° C. and (b) from 2 to 30% by weight of a fragment soluble in para-xylene at 23° C.; (2) The fragment (a) has a relaxation time, τ, of from 0.01 to 0.35 seconds at an angular frequency, ω, of 10°/sec as obtained through melt viscoelastometry, and has a molecular weight distribution index (PDI) of from 1 to 18, which is represented by ω 2 /10ω 1 where ω 1 indicates an angular frequency at which the modulus of stored elasticity, G', as obtained through melt viscoelastometry is 2×10 2 Pa, and ω 2 indicates an angular frequency at which G' is 2×10 4 Pa; (3) The fragment (b) has a limiting viscosity [η] in decalin at 135° C. of from 2.0 to 10 dl/g; and (4) The ethylene unit content of (A) is from 1 to 17% by weight.
Claim 4
Dependent Claim
30 words
The propylene-based resin composition as claimed in claim 1, wherein the ethylene-C 3-18 α-olefin copolymer of the component (B) has an α-olefin content of from 20 to 70% by weight.
Claim 5
Dependent Claim
15 words
An automobile trim member as produced by injection-molding the propylene-based resin composition of claim 1.
Claim 6
Dependent Claim
15 words
An automobile trim member as produced by injection-molding the propylene-based resin composition of claim 3.
Claim 7
Dependent Claim
32 words
The propylene-based resin composition as claimed in claim 2, wherein the ethylene-C 3 -C 18 α-olefin copolymer of the component (B) has an α-olefin content of from 20 to 70% by weight.
Claim 8
Dependent Claim
15 words
An automobile trim member as produced by injection-molding the propylene-based resin composition of claim 2.
Claim 9
Dependent Claim
24 words
The propylene-based resin composition as claimed in claim 1, wherein the component (A) has a melt index of from 1 to 100 g/10 min.
Claim 10
Dependent Claim
24 words
The propylene-based resin composition as claimed in claim 8, wherein the component (A) has a melt index of from 5 to 70 g/10 min.
Claim 11
Dependent Claim
24 words
The propylene-based resin composition as claimed in claim 9, wherein the component (A) has a melt index of from 10 to 40 g/10 min.
Claim 12
Dependent Claim
55 words
The propylene-based resin composition as claimed in claim 1, wherein the component (A) is a mixture of a propylene-based resin having a melt index of larger than 8 g/10 min, and of from 5 to 30% by weight of said mixture, of a propylene-based resin having a melt index of smaller than 5 g/10 min.
Claim 13
Dependent Claim
24 words
The propylene-based resin composition as claimed in claim 1, wherein the component (B) has a density of from 0.855 to 0.870 g/cm 3 .
Claim 14
Dependent Claim
24 words
The propylene-based resin composition as claimed in claim 1, wherein the component (B) has a melt index of from 0.01 to 6 g/10 min.
Claim 15
Dependent Claim
24 words
The propylene-based resin composition as claimed in claim 13, wherein the component (B) has a melt index of from 0.01 to 1 g/10 min.
Claim 16
Dependent Claim
39 words
The propylene-based resin composition as claimed in claim 1, wherein the talc is in the form of grains having a mean grain size of from 1 to 8 μm and a mean aspect ratio of not smaller than 4.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-07 | 2003-09-06 | 2004-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-07 | 2007-09-06 | 2008-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-07 | 2011-09-06 | 2012-03-07 | $7700.00 | Window Closed / Lapsed |