§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4429079A Expired / Lapsed US ⏱️ 0.0 years remaining

Ethylene/alpha-olefin copolymer composition

Assignee: Mitsui Chemicals Inc
•
Filing: 1981-08-07
•
Granted: 1984-01-31
•
Expires: 2001-08-07
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract PCT No. PCT/JP81/00173 Sec. 371 Date Mar. 11, 1982 Sec. 102(e) Date Mar. 11, 1982 PCT Filed Aug. 7, 1981 PCT Pub. No. WO82/00470 PCT Pub. Date Feb. 18, 1982.This invention relates to a composition comprising a mixture of at least two ethylene-rich ethylene/alpha-olefin copolymers (A) and (B) below which has excellent transparency and impact strength and improved properties, particularly low-temperature heat sealability, heat seal strength and flexural resistance. (A) 95 to 40% by weight of a random copolymer of ethylene and an alpha-olefin having 5 to 10 carbon atoms which has a melt index of 0.1 to 20 g/10 min., a density of 0.910 to 0.940 g/cm3, a crystallinity by X-rays of 40 to 70%, a melting point of 115 DEG to 130 DEG C. and an ethylene content of 94 to 99.5 mole %; and (B) 5 to 60% by weight of a random copolymer of ethylene and an alpha-olefin having 3 to 10 carbon atoms which has a melt index of 0.1 to 50 g/10 min., a density of 0.870 to 0.900 g/cm3, a crystallinity by X-rays of 5 to 40%, a melting point of 40 DEG to 100 DEG C. and an ethylene content of 85 to 95 mole %.

Inventors

  • 👤 Yuzo Shibata
  • 👤 Seikoh Naganuma

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 01:43
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L2205/00; C08L2205/02; C08L2205/025; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/31504; Y10T428/31855; Y10T428/31938

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 141 words
An ethylene/alpha-olefin copolymer composition characterized by comprising a mixture of 95 to 40% by weight of (A) a random copolymer of ethylene and an alpha-olefin having 5 to 10 carbon atoms having a melt index of 0.1 to 20 g/10 min., a density of 0.910 to 0.940 g/cm 3 , a crystallinity by X-rays of 40 to 70%, a melting point of 115° to 130° C. and an ethylene content of 94 to 99.5 mole%, and 5 to 60% by weight of (B) a random copolymer of ethylene and an alpha-olefin having 3 to 10 carbon atoms having a melt index of 0.1 to 50 g/10 min., a density of 0.870 to 0.900 g/cm 3 , a crystallinity by X-rays of 5 to 40%, a melting point of 40° to 100° C. and an ethylene content of 85 to 95 mole%.
Claim 2
Dependent Claim 141 words
An ethylene/alpha-olefin copolymer composition characterized by comprising a mixture of 95 to 40% by weight of (A) a random copolymer of ethylene and an alpha-olefin having 5 to 10 carbon atoms having a melt index of 0.1 to 20 g/10 min., a density of 0.910 to 0.940 g/cm 3 , a crystallinity by X-rays of 40 to 70%, a melting point of 115° to 130° C. and an ethylene content of 94 to 99.5 mole%, and 5 to 60% by weight of (B) a random copolymer of ethylene and an alpha-olefin having 3 to 10 carbon atoms having a melt index of 0.1 to 50 g/10 min., a density of 0.870 to 0.900 g/cm 3 , a crystallinity by X-rays of 5 to 40%, a melting point of 40° to 100° C. and an ethylene content of 85 to 95 mole%.
Claim 3
Dependent Claim 19 words
The ethylene/alpha-olefin copolymer composition set forth in claim 1 wherein the alpha-olefin of the random copolymer (A) is 4-methyl-l-pentene.
Claim 4
Dependent Claim 19 words
The ethylene/alpha-olefin copolymer composition set forth in claim 1 wherein the alpha-olefin of the random copolymer (A) is 1-octene.
Claim 5
Dependent Claim 24 words
The ethylene/alpha-olefin copolymer composition set forth in claim 1 wherein the random copolymer (A) has a molecular weight distribution of not more than 6.
Claim 6
Dependent Claim 23 words
The ethylene/alpha-olefin copolymer composition set forth in claim 1 wherein the crystallinity by X-rays of the random copolymer (A) is 50 to 65%.
Claim 7
Dependent Claim 18 words
The ethylene/alpha-olefin copolymer composition wherein the crystallinity by X-rays of the random copolymer (B) is 7 to 30%.
Claim 8
Dependent Claim 18 words
The ethylene/alpha-olefin copolymer composition wherein the crystallinity by X-rays of the random copolymer (B) is 7 to 30%.
Claim 9
Dependent Claim 28 words
The ethylene/alpha-olefin copolymer composition set forth in claim 1 wherein the mixing ratio of the random copolymer (A) to the random copolymer (B) is from 90:10 to 60:40.

References Cited (Backward Citations)

US4188350A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-01-30 1987-08-01 1988-01-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-01-30 1991-08-01 1992-01-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-01-30 1995-08-01 1996-01-31 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag