EP0079080A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Foamable electroconductive polyolefin resin compositions
Assignee: Dow Chemical Co
•
Filing: 1982-11-09
•
Granted: —
•
Expires: 2002-11-09
Abstract
Abstract Electroconductive olefin polymer foams 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.
Inventors
- 👤 Akira Fujie
- 👤 Minoru Hisamatsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:56
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08J; C08J9/00; C08J9/0066; C08J9/0014; C08J9/0028; C08J9/04; C08J9/12; C08J9/14; C08K; C08K3/00; C08K3/02; C08K3/04; C08K5/00; C08K5/16; C08K5/20; H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
An expandable olefin polymer composition suitable for preparing an electroconductive foam which comprises 100 parts by weight of an olefin polymer resin, a blowing agent, from 5 to 30 weight percent based on the olefin polymer resin of an electroconductive carbon black and from 0.1 to 10 weight percent based on the olefin polymer resin of a saturated amide compound of the formula: wherein R 1 is an alkyl group having from 8 to 22 carbon atoms and R 2 and R 3 individually are a hydrogen atom or an alkyl group having from 1 to 22 carbon atoms.
Claim 2
Dependent Claim
99 words
An expandable olefin polymer composition suitable for preparing an electroconductive foam which comprises 100 parts by weight of an olefin polymer resin, a blowing agent, from 5 to 30 weight percent based on the olefin polymer resin of an electroconductive carbon black and from 0.1 to 10 weight percent based on the olefin polymer resin of a saturated amide compound of the formula: wherein R 1 is an alkyl group having from 8 to 22 carbon atoms and R 2 and R 3 individually are a hydrogen atom or an alkyl group having from 1 to 22 carbon atoms.
Claim 3
Dependent Claim
20 words
The expandable olefin polymer composition of Claim 1 wherein the polyolefin resin is a polyethylene or ethylene-vinyl acetate copolymer resin.
Claim 4
Dependent Claim
37 words
The expandable polymer composition 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 5
Dependent Claim
29 words
The expandable polymer composition of Claim 1 wherein the electroconductive carbon black is an electroconductive furnace carbon black having a specific surface of at least 900 m 2 /g.
Claim 6
Dependent Claim
33 words
The expandable polymer composition of Claim 4 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 7
Dependent Claim
33 words
The expandable polymer composition of Claim 1 wherein the Formula I amide is employed in an amount ranging from 0.3 to 8 weight percent based upon the weight of the olefin polymer resin.
Claim 8
Dependent Claim
91 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 electro-conductive carbon black, and from 0.1 to 10 weight percent based upon said olefin polymer resin of a saturated amide compound of the formula: wherein R 1 is an alkyl group having from 8 to 22 carbon atoms and R 2 and R 3 individually are a hydrogen atom or an alkyl group having from 1 to 22 carbon atoms.
Claim 9
Dependent Claim
91 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 electro-conductive carbon black, and from 0.1 to 10 weight percent based upon said olefin polymer resin of a saturated amide compound of the formula: wherein R 1 is an alkyl group having from 8 to 22 carbon atoms and R 2 and R 3 individually are a hydrogen atom or an alkyl group having from 1 to 22 carbon atoms.
Claim 10
Dependent Claim
39 words
The foam article of Claim 7 wherein the polyolefin resin is a polyethylene or ethylene-vinyl acetate composition and the electroconductive carbon black is an electroconductive furnace carbon black having a specific surface of at least 900 m 2 /g.
Claim 11
Dependent Claim
33 words
The foam article of Claim 7 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 12
Dependent Claim
17 words
The electroconductive resin foam of Claim 7 prepared by extrusion foaming with a volatile organic blowing agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.