US4431575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable polyolefin resin composition
Assignee: Dow Chemical Co
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Filing: 1982-11-08
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Granted: 1984-02-14
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Expires: 2002-11-08
Abstract
Abstract Electroconductive olefin polymer foams which are suitable for use as packaging/cushioning materials for sensitive electronic parts are prepared from olefin polymer compositions which comprise a major proportion by weight of an olefin polymer, from 5 to 30 weight percent, based on said olefin polymer, of an electroconductive carbon black and from 0.1 to 10 weight percent, based on said olefin polymer of a saturated fatty acid amide compound.
Inventors
- 👤 Akira Fujie
- 👤 Minoru Hisamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/0014; C08J9/0028; C08K; C08K3/00; C08K3/02; C08K3/04; C08K5/00; C08K5/16; C08K5/20; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
An electroconductive olefin polymer foam article which comprises 100 parts by weight of an olefin polymer resin, from 5 to 30 weight percent, based upon said olefin polymer resin, of an electroconductive carbon black and from 0.1 to 10 weight percent, based upon said olefin polymer resin, of a saturated amide compound of the following formula: ##STR2## wherein R 1 represents an alkyl group having from 8 to 22 carbon atoms and wherein R 2 and R 3 individually represent a hydrogen atom or an alkyl group having from 1 to 22 carbon atoms.
Claim 2
Dependent Claim
94 words
An electroconductive olefin polymer foam article which comprises 100 parts by weight of an olefin polymer resin, from 5 to 30 weight percent, based upon said olefin polymer resin, of an electroconductive carbon black and from 0.1 to 10 weight percent, based upon said olefin polymer resin, of a saturated amide compound of the following formula: ##STR2## wherein R 1 represents an alkyl group having from 8 to 22 carbon atoms and wherein R 2 and R 3 individually represent a hydrogen atom or an alkyl group having from 1 to 22 carbon atoms.
Claim 3
Dependent Claim
29 words
The foam article of claim 1 wherein the electroconductive carbon black is an electroconductive furnace carbon black having a specific surface of at least about 900 m 2 /g.
Claim 4
Dependent Claim
33 words
The foam article of claim 1 wherein the Formula (I) amide compound is employed in an amount ranging from 0.3 to 8 weight percent based upon the weight of said olefin polymer resin.
Claim 5
Dependent Claim
32 words
The foam article of claim 1 wherein the electroconductive carbon black is employed in an amount ranging from 10 to 20 weight percent based upon the weight of said olefin polymer resin.
Claim 6
Dependent Claim
36 words
The foam article of claim 1 wherein the olefin polymer resin employed is a low density polyethylene having a melt index of from 1 to 30 decigrams/minute and a density of from 0.910 to 0.930 g/cc.
Claim 7
Dependent Claim
33 words
The foam article of claim 1 wherein said foam article has a density which is at least 5 times less than that of the unexpanded olefin polymer composition from which it was prepared.
Claim 8
Dependent Claim
96 words
An expandable olefin polymer composition which comprises 100 parts by weight of an olefin polymer resin, a blowing agent, from 5 to 30 weight percent, based upon said olefin polymer resin, of an electroconductive carbon black and from 0.1 to 10 weight percent, based upon said olefin polymer resin, of a saturated amide compound represented by the following formula: ##STR3## wherein R 1 represents an alkyl group having from 8 to 22 carbon atoms and R 2 and R 3 individually represent a hydrogen atom or an alkyl group having from 1 to 22 carbon atoms.
Claim 9
Dependent Claim
96 words
An expandable olefin polymer composition which comprises 100 parts by weight of an olefin polymer resin, a blowing agent, from 5 to 30 weight percent, based upon said olefin polymer resin, of an electroconductive carbon black and from 0.1 to 10 weight percent, based upon said olefin polymer resin, of a saturated amide compound represented by the following formula: ##STR3## wherein R 1 represents an alkyl group having from 8 to 22 carbon atoms and R 2 and R 3 individually represent a hydrogen atom or an alkyl group having from 1 to 22 carbon atoms.
Claim 10
Dependent Claim
30 words
The expandable polymer composition of claim 7 wherein the electroconductive carbon black is an electroconductive furnace carbon black having a specific surface of at least about 900 m 2 /g.
Claim 11
Dependent Claim
34 words
The expandable polymer composition of claim 7 wherein the Formula (I) amide compound is employed in an amount ranging from 0.3 to 8 weight percent based upon the weight of said olefin polymer resin.
Claim 12
Dependent Claim
33 words
The expandable polymer composition of claim 7 wherein the electroconductive carbon black is employed in an amount ranging from 10 to 20 weight percent based upon the weight of said olefin polymer resin.
Claim 13
Dependent Claim
37 words
The expandable polymer composition of claim 7 wherein the olefin polymer resin employed is a low density polyethylene having a melt index of from 1 to 30 decigrams/minute and a density of from 0.910 to 0.930 g/cc.
Claim 14
Dependent Claim
17 words
The expandable polymer composition of claim 7 wherein the blowing agent is a volatile organic blowing agent.
References Cited (Backward Citations)
US4214054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |