Patent US4211690A successfully refreshed from Google Patents.
US4211690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene resin compositions and moldings thereof
Assignee: Hitachi Ltd
•
Filing: 1978-08-30
•
Granted: 1980-07-08
•
Expires: 1998-08-30
Abstract
Abstract The present invention provides polypropylene resin compositions of excellent gloss, impact resistance and rigidity comprising (A) 100 parts by weight of propylene homopolymer having an intrinsic viscosity in tetraline at 135 DEG C. of no less than 1.9, (B) 40-150 parts by weight of ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135 DEG C. of 1.4-1.7 and an ethylene content of 2-15 molar % and (C) 40-150 parts by weight of ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135 DEG C. of no less than 1.9 and an ethylene content of 2-20 molar % or comprising above components (A) through (C) and (D) 5-120 parts by weight of a powdery inorganic filler of an average particle diameter of no more than 0.8 mu m, and moldings, i.e. molded articles, prepared from these compositions.
Inventors
- 👤 Hideki Asano
- 👤 Hiroyoshi Kokaku
- 👤 Katsuhito Suzuki
- 👤 Kenichi Saida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:38
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/14; C08L23/142; C08L53/00; C08L2205/00; C08L2205/02; C08L2205/03
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
88 words
A polypropylene resin composition comprising (A) 100 parts by weight of propylene homopolymer having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9; and (B) 40-150 parts by weight of ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135° C. of 1.4-1.7 and an ethylene content of 2-15 molar % and (C) 40-150 parts by weight of a block ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9 and an ethylene content of 2-20 molar %.
Claim 2
Dependent Claim
88 words
A polypropylene resin composition comprising (A) 100 parts by weight of propylene homopolymer having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9; and (B) 40-150 parts by weight of ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135° C. of 1.4-1.7 and an ethylene content of 2-15 molar % and (C) 40-150 parts by weight of a block ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9 and an ethylene content of 2-20 molar %.
Claim 3
Dependent Claim
16 words
A polypropylene resin composition according to claim 1, wherein ethylene/propylene copolymer (B) is a block copolymer.
Claim 4
Dependent Claim
17 words
A polypropylene resin composition according to claim 1, wherein the ethylene/propylene copolymer (B) is a random copolymer.
Claim 5
Dependent Claim
109 words
A polypropylene resin composition comprising (A) 100 parts by weight of propylene homopolymer having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9; (B) 40-150 parts by weight of ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135° C. of 1.4-1.7 and an ethylene content of 2-15 molar % and (C) 40-150 parts by weight of a block ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9 and an ethylene content of 2-20 molar %; and (D) 5-120 parts by weight of a powdery inorganic filler of an average particle diameter of no more than 0.8 μm.
Claim 6
Dependent Claim
109 words
A polypropylene resin composition comprising (A) 100 parts by weight of propylene homopolymer having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9; (B) 40-150 parts by weight of ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135° C. of 1.4-1.7 and an ethylene content of 2-15 molar % and (C) 40-150 parts by weight of a block ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9 and an ethylene content of 2-20 molar %; and (D) 5-120 parts by weight of a powdery inorganic filler of an average particle diameter of no more than 0.8 μm.
Claim 7
Dependent Claim
19 words
A polypropylene resin composition according to claim 4, wherein both of the ethylene/propylene copolymer (B) is a block copolymer.
Claim 8
Dependent Claim
17 words
A polypropylene resin composition according to claim 4, wherein the ethylene/propylene copolymer (B) is a random copolymer.
Claim 9
Dependent Claim
40 words
A polypropylene resin composition according to claim 4, wherein the powdery inorganic filler (D) is at least one member selected from the group consisting of calcium carbonate and talc of an average particle diameter of no more than 0.8 μm.
Claim 10
Dependent Claim
103 words
A polypropylene resin composition comprising 100 parts by weight of a propylene homopolymer (A) having an intrinsic viscosity in tetralin at 135° C. of 1.9-2.5; 70-120 parts by weight of a block ethylene/propylene copolymer (B) having an intrinsic viscosity in tetralin at 135° C. of 1.5-1.6 and an ethylene content of 4-7 molar %; 70-120 parts by weight of a block ethylene/propylene copolymer (C) having an intrinsic viscosity in tetralin at 135° C. of 1.9-2.5 and an ethylene content of 3-5 molar % and 15-100 parts by weight of a powdery inorganic filler of an average particle diameter of less than 0.1 μm.
Claim 11
Dependent Claim
103 words
A polypropylene resin composition comprising 100 parts by weight of a propylene homopolymer (A) having an intrinsic viscosity in tetralin at 135° C. of 1.9-2.5; 70-120 parts by weight of a block ethylene/propylene copolymer (B) having an intrinsic viscosity in tetralin at 135° C. of 1.5-1.6 and an ethylene content of 4-7 molar %; 70-120 parts by weight of a block ethylene/propylene copolymer (C) having an intrinsic viscosity in tetralin at 135° C. of 1.9-2.5 and an ethylene content of 3-5 molar % and 15-100 parts by weight of a powdery inorganic filler of an average particle diameter of less than 0.1 μm.
Claim 12
Dependent Claim
123 words
Polypropylene resin moldings having a surface reflectance of higher than 80%, an Izod impact strength of higher than 5 kg.cm/cm and an elastic modulus in tension of higher than 12,000 kg/cm 2 which is prepared by molding a polypropylene resin composition comprising 100 parts by weight of propylene homopolymer (A) having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9; 40-150 parts by weight of ethylene/propylene copolymer (B) having an intrinsic viscosity in tetralin at 135° C. of 1.4-1.7 and an ethylene content of 2-15 molar % and 40-150 parts by weight of a block ethylene/propylene copolymer (C) having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9 and ethylene content of 2-20 molar %.
Claim 13
Dependent Claim
123 words
Polypropylene resin moldings having a surface reflectance of higher than 80%, an Izod impact strength of higher than 5 kg.cm/cm and an elastic modulus in tension of higher than 12,000 kg/cm 2 which is prepared by molding a polypropylene resin composition comprising 100 parts by weight of propylene homopolymer (A) having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9; 40-150 parts by weight of ethylene/propylene copolymer (B) having an intrinsic viscosity in tetralin at 135° C. of 1.4-1.7 and an ethylene content of 2-15 molar % and 40-150 parts by weight of a block ethylene/propylene copolymer (C) having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9 and ethylene content of 2-20 molar %.
Claim 14
Dependent Claim
146 words
Polypropylene resin moldings having a surface reflectance of higher than 80%, an Izod impact strength of higher than 5 kg.cm/cm and an elastic modulus in tension of higher than 12,000 kg/cm 2 , which is prepared by molding a polypropylene resin composition comprising 100 parts by weight of propylene homopolymer (A) having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9; 40-150 parts by weight of ethylene/propylene copolymer (B) having an intrinsic viscosity in tetralin at 135° C. of 1.4-1.7 and an ethylene content of 2-15 molar % and 40-150 parts by weight of a block ethylene/propylene copolymer (C) having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9 and an ethylene content of 2-20 molar %; and 5-120 parts by weight of a powdery inorganic filler of an average particle diameter of no more than 0.8 μm.
Claim 15
Dependent Claim
146 words
Polypropylene resin moldings having a surface reflectance of higher than 80%, an Izod impact strength of higher than 5 kg.cm/cm and an elastic modulus in tension of higher than 12,000 kg/cm 2 , which is prepared by molding a polypropylene resin composition comprising 100 parts by weight of propylene homopolymer (A) having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9; 40-150 parts by weight of ethylene/propylene copolymer (B) having an intrinsic viscosity in tetralin at 135° C. of 1.4-1.7 and an ethylene content of 2-15 molar % and 40-150 parts by weight of a block ethylene/propylene copolymer (C) having an intrinsic viscosity in tetralin at 135° C. of no less than 1.9 and an ethylene content of 2-20 molar %; and 5-120 parts by weight of a powdery inorganic filler of an average particle diameter of no more than 0.8 μm.
Claim 16
Dependent Claim
20 words
Polypropylene resin moldings according to claim 9, wherein the ethylene/propylene copolymer (B) is a block copolymer, or a random copolymer.
Claim 17
Dependent Claim
20 words
Polypropylene resin moldings according to claim 10, wherein the ethylene/propylene copolymer (B) is a block copolymer or a random copolymer.
Claim 18
Dependent Claim
16 words
Polypropylene resin moldings according to claim 9, wherein the ethylene/propylene copolymer (B) is a block copolymer.
Claim 19
Dependent Claim
15 words
Polypropylene resin moldings according to claim 10, wherein the copolymer (B) is a random copolymer.
Claim 20
Dependent Claim
108 words
Polypropylene resin moldings according to claim 10, wherein the composition comprises 100 parts by weight of the propylene homopolymer (A) having an intrinsic viscosity in tetralin at 135° C. of 1.9-2.5; 70-120 parts by weight of the ethylene/propylene copolymer (B) having an intrinsic viscosity in tetralin at 135° C. of 1.5-1.6 and an ethylene content of 4-7 molar % and 70-120 parts by weight of the ethylene/propylene homopolymer (C) having an intrinsic viscosity in tetralin at 135° C. of 1.9-2.5 and an ethylene content of 3-5 molar %; and 15-100 parts by weight of powdery inorganic filler (D) of an average particle diameter of less than 0.1 μm.
References Cited (Backward Citations)
US3262992A
Cited
US3562790A
Cited
US3634546A
Cited
US3632674A
Cited
US3689595A
Cited
US4153587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |