US5080942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High stretch elastomeric pre-stretched tubes
Assignee: 3M Co
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Filing: 1990-05-23
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Granted: 1992-01-14
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Expires: 2010-05-23
Abstract
Abstract Compositions and a process for manufacturing an elastomeric, low modulus pre-stretched tubular article supported by a removable core. The article has a low Shore A hardness value and a low modulus which allows a large expansion ratio and an increased wall thickness.
Inventors
- 👤 Steven D. Yau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:32
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/10; H02G15/103; H02G15/105; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/36; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/10; C08K5/14; C08K5/16; C08K5/17; C08K5/54; C08L; C08L23/00; C08L23/02; C08L23/16; C08L9/00; C08L91/00; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H02G15/02; H02G15/06; H02G15/064; H02G15/068; C08L2205/00; C08L2205/02; C08L2205/025; C08L2205/03; C08L2312/00; C08L2666/00; C08L2666/02; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1352; Y10T428/1386
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
105 words
An article comprising an elastomeric tubular member supported in a stretched condition on an easily removable core, said tubular member comprising: (a) about 10 to 50 weight percent of an oil-extended ethylene propylene diene monomer rubber, (b) about 5 to 25 weight percent of an elastomer selected from the group consisting of a nonoil-extended ethylene propylene diene monomer rubber and nonoil-extended ethylene propylene (c) about 5 to 15 weight percent of an extender, (d) about 10 to 30 weight percent of a processing oil, (e) about 2 to 30 weight percent of silica, and (f) up to about 30 weight percent of a polymeric plasticizer.
Claim 2
Dependent Claim
105 words
An article comprising an elastomeric tubular member supported in a stretched condition on an easily removable core, said tubular member comprising: (a) about 10 to 50 weight percent of an oil-extended ethylene propylene diene monomer rubber, (b) about 5 to 25 weight percent of an elastomer selected from the group consisting of a nonoil-extended ethylene propylene diene monomer rubber and nonoil-extended ethylene propylene (c) about 5 to 15 weight percent of an extender, (d) about 10 to 30 weight percent of a processing oil, (e) about 2 to 30 weight percent of silica, and (f) up to about 30 weight percent of a polymeric plasticizer.
Claim 3
Dependent Claim
11 words
The article of claim 1 wherein said extender is aluminum trihydrate.
Claim 4
Dependent Claim
15 words
The article of claim 1 further containing up to about 35 weight percent carbon black.
Claim 5
Dependent Claim
14 words
The article of claim 1 having a Shore A hardness value below about 33.
Claim 6
Dependent Claim
18 words
The article of claim 1 having a 300% stretch modulus at below about 220 pounds per square inch.
Claim 7
Dependent Claim
12 words
The article of claim 1 being capable of elongation over about 900%.
Claim 8
Dependent Claim
16 words
The article of claim 1 having a tensile strength of over 1000 pounds per square inch.
Claim 9
Dependent Claim
18 words
The article of claim 1 further containing about 1 to 5 weight percent of peroxide as a curing.
Claim 10
Dependent Claim
13 words
The article of claim 1 having a dielectric strength above about 450 V/mil.
Claim 11
Dependent Claim
14 words
The article of claim 1 having an expansion ratio of about 5 to 1.
Claim 12
Dependent Claim
14 words
The article of claim 1 having a permanent set of less than about 20%.
Claim 13
Dependent Claim
14 words
The article of claim 1 wherein said processing oil is a paraffinic petroleum oil.
Claim 14
Dependent Claim
104 words
An article comprising an elastomeric tubular member supported in a stretched condition on an easily removable core, said tubular member comprising: (a) about 10 to 50 weight percent of an oil-extended ethylene propylene rubber, (b) about 5 to 25 weight percent of an elastomer selected from the group consisting of a nonoil-extended ethylene propylene diene monomer rubber and nonoil-extended ethylene propylene rubber, (c) about 5 to 15 weight percent of an extender, (d) about 10 to 30 weight percent of a processing oil, (e) about 2 to 30 weight percent of silica, and (f) up to about 30 weight percent of a polymeric plasticizer.
Claim 15
Dependent Claim
104 words
An article comprising an elastomeric tubular member supported in a stretched condition on an easily removable core, said tubular member comprising: (a) about 10 to 50 weight percent of an oil-extended ethylene propylene rubber, (b) about 5 to 25 weight percent of an elastomer selected from the group consisting of a nonoil-extended ethylene propylene diene monomer rubber and nonoil-extended ethylene propylene rubber, (c) about 5 to 15 weight percent of an extender, (d) about 10 to 30 weight percent of a processing oil, (e) about 2 to 30 weight percent of silica, and (f) up to about 30 weight percent of a polymeric plasticizer.
Claim 16
Dependent Claim
135 words
A process for manufacturing an article comprising an elastomeric tubular member supported in a stretched condition on an easily removable core, said process comprising the steps of: (a) mixing about 5 to 25 weight percent of an elastomer selected from the group consisting of a nonoil-extended ethylene propylene diene monomer rubber and nonoil-extended ethylene propylene rubber with about 2 to 30 weight percent resin of precipitated silica, (b) adding about 10 to 50 weight percent of an oil-extended ethylene propylene diene monomer rubber, (c) adding a sufficient amount of a curative, (d) heating said mixture to a temperature below the decomposition temperature of said curative, (e) forming said mixture into an V appropriate shape, (f) allowing said mixture to cure into a solid composition, and (g) loading said solid composition on an easily removable core.
Claim 17
Dependent Claim
135 words
A process for manufacturing an article comprising an elastomeric tubular member supported in a stretched condition on an easily removable core, said process comprising the steps of: (a) mixing about 5 to 25 weight percent of an elastomer selected from the group consisting of a nonoil-extended ethylene propylene diene monomer rubber and nonoil-extended ethylene propylene rubber with about 2 to 30 weight percent resin of precipitated silica, (b) adding about 10 to 50 weight percent of an oil-extended ethylene propylene diene monomer rubber, (c) adding a sufficient amount of a curative, (d) heating said mixture to a temperature below the decomposition temperature of said curative, (e) forming said mixture into an V appropriate shape, (f) allowing said mixture to cure into a solid composition, and (g) loading said solid composition on an easily removable core.
Claim 18
Dependent Claim
23 words
The process of claim 14 wherein said curative is added in an amount of about 1 to 5 weight percent of a peroxide.
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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) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |