US4151126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin/conductive carbon composites
Assignee: EIDP Inc
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Filing: 1977-04-25
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Granted: 1979-04-24
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Expires: 1997-04-25
Abstract
Abstract Shaped polyolefin objects having decorative metal coatings are obtained by (1) cold compressing a solid, substantially homogeneous, particulate, highly-filled polyolefin composite containing polyolefin, particularly polyethylene, and at least 33% by weight of filler including at least 10% of conductive carbon and, optionally, an inorganic filler compound, in which the polyolefin is polymerized onto the surface of the filler, (2) sintering the compressed shaped object, and (3) electroplating the sintered object.
Inventors
- 👤 Robert L. Adelman
- 👤 Edward G. Howard, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:21
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/02; C08K3/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A solid, halogen-free, homogeneous, particulate, polyolefin/conductive carbon composite which comprises by weight (a) 15 to 60% of ultra high molecular weight polyolefin selected from the group consisting of polyethylene and copolymers of ethylene containing up to 15% by weight of units derived from one or more 1-alkenes of 3 to 10 carbons, and (b) 40 to 85% of finely-divided filler, said filler comprising by weight, based on the total composite, (1) 15 to 75% of conductive carbon having a weight-average equivalent spherical particle diameter of 5 to 500 millimicrons, and (2) 10 to 70% of inorganic filler compound having a neutral-to-acidic surface and a weight-average equivalent spherical particle diameter, of 0.1 to 50μ, in which essentially all of the polyolefin is polymerized onto the surface of the filler, and essentially all of the filler has polyolefin polymerized onto its surface, and the composite has a resistivity of not more than 5 ohm cm in compression molded form.
Claim 2
Dependent Claim
157 words
A solid, halogen-free, homogeneous, particulate, polyolefin/conductive carbon composite which comprises by weight (a) 15 to 60% of ultra high molecular weight polyolefin selected from the group consisting of polyethylene and copolymers of ethylene containing up to 15% by weight of units derived from one or more 1-alkenes of 3 to 10 carbons, and (b) 40 to 85% of finely-divided filler, said filler comprising by weight, based on the total composite, (1) 15 to 75% of conductive carbon having a weight-average equivalent spherical particle diameter of 5 to 500 millimicrons, and (2) 10 to 70% of inorganic filler compound having a neutral-to-acidic surface and a weight-average equivalent spherical particle diameter, of 0.1 to 50μ, in which essentially all of the polyolefin is polymerized onto the surface of the filler, and essentially all of the filler has polyolefin polymerized onto its surface, and the composite has a resistivity of not more than 5 ohm cm in compression molded form.
Claim 3
Dependent Claim
11 words
The composite of claim 1 in which the polyolefin is polyethylene.
Claim 4
Dependent Claim
21 words
The composite of claim 2 in which the conductive carbon has a rubber formulation resistivity of less than 100 ohm cm.
Claim 5
Dependent Claim
20 words
The composite of claim 3 which contains 20-55% polyethylene, 20-60% conductive carbon, 20-60% inorganic filler compound, and 45-80% total filler.
Claim 6
Dependent Claim
21 words
The composite of claim 4 in which the conductive carbon has a rubber formulation resistivity of less than 50 ohm cm.
Claim 7
Dependent Claim
14 words
The composite of claim 5 in which the inorganic filler compound is kaolinite clay.
Claim 8
Dependent Claim
15 words
The composite of claim 5 in which the inorganic filler compound is an alumina hydrate.
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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |