US4075290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealable polybutene-1 blends containing polypropylene or ethylene copolymer
Assignee: VESTOLEN GmbH
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Filing: 1973-07-12
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Granted: 1978-02-21
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Expires: 1993-07-12
Abstract
Abstract Polymer blends comprising a major amount of polybutene-1 with a minor amount of low-pressure polypropylene or ethylene/propylene or butene-1 copolymers exhibit improved physical properties.
Inventors
- 👤 Horst Denzel
- 👤 Otto Hahmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:45
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A composition of matter consisting essentially of an intimate admixture of: (a) 85-95 weight percent of an at least 95% isotactic polybutene-1 having a density of 0.914-0.919 and a solution viscosity molecular weight of 650,000-1,500,000; and (b) correspondingly 15-5 weight percent of a low pressure ethylene copolymer with 1-3 weight percent of propylene or butene-1 having a density of 0.931-0.937 and a solution viscosity molecular weight of 75,000-140,000.
Claim 2
Dependent Claim
68 words
A composition of matter consisting essentially of an intimate admixture of: (a) 85-95 weight percent of an at least 95% isotactic polybutene-1 having a density of 0.914-0.919 and a solution viscosity molecular weight of 650,000-1,500,000; and (b) correspondingly 15-5 weight percent of a low pressure ethylene copolymer with 1-3 weight percent of propylene or butene-1 having a density of 0.931-0.937 and a solution viscosity molecular weight of 75,000-140,000.
Claim 3
Dependent Claim
25 words
A composition according to claim 1, wherein component (b) is a copolymer with 2-2.5 weight percent of propylene or butene-1 having a density of 0.932-0.936.
Claim 4
Dependent Claim
23 words
A composition according to claim 2, wherein said isotactic polybutene-1 has a density of 0.916-0.919 and a solution viscosity molecular weight of 750,000-1,400,000.
Claim 5
Dependent Claim
58 words
A composition of matter consisting essentially of an intimate admixture of: (a) 85-95 weight percent of an at least 95% isotactic polybutene-1 having a density of 0.914-0.919 and a solution viscosity molecular weight of 650,000-1,500,000; and (b) correspondingly 15-5 weight percent of an isotactic polypropylene having a density of 0.904-0.910 and a solution viscosity molecular weight of 200,000-350,000.
Claim 6
Dependent Claim
58 words
A composition of matter consisting essentially of an intimate admixture of: (a) 85-95 weight percent of an at least 95% isotactic polybutene-1 having a density of 0.914-0.919 and a solution viscosity molecular weight of 650,000-1,500,000; and (b) correspondingly 15-5 weight percent of an isotactic polypropylene having a density of 0.904-0.910 and a solution viscosity molecular weight of 200,000-350,000.
Claim 7
Dependent Claim
23 words
A composition according to claim 4, wherein said isotactic polypropylene has a density of 0.907-0.910 and a solution viscosity molecular weight of 215,000-310,000.
Claim 8
Dependent Claim
23 words
A composition according to claim 5, wherein said isotactic polybutene-1 has a density of 0.916-0.919 and a solution viscosity molecular weight of 750,000-1,400,000.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |