EP0248602A2
Expired / Lapsed
EP
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Conductive foam
Assignee: BASF SE
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Filing: 1987-05-29
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Granted: —
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Expires: 2007-05-29
Abstract
Abstract A conductive foam having a surface resistance of not more than 9.9x10¹⁰ ohms as measured by DIN 53,345 may be prepared by incorporating into the base compound at least 5 parts by dry weight per 100 parts by weight of polymer of a dispersion of carbon black stabilized by a soap predominantly of the same type as that compatible with the process used to set the foam; and processing the compound in a conventional manner.
Inventors
- 👤 Jean-Pierre Kleitz
- 👤 Pierre Henri André Mertzeisen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 21:01
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/68; D06; D06N; D06N7/00; D06N7/0063; D06N7/0071; D06N7/0073; D06N2203/00; D06N2203/02; D06N2203/022; D06N2203/04; D06N2203/041; D06N2203/045; D06N2203/047; D06N2205/00; D06N2205/02; D06N2205/04; D06N2205/045; D06N2205/20; D06N2209/00; D06N2209/02; D06N2209/025; D06N2209/04; D06N2209/041; D06N2209/046; D06N2209/10; D06N2209/101; D06N2209/16; D06N2209/1664; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/911
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
134 words
A method for the production of conductive foam having a surface resistance of not more than 9.9x10¹⁰ ohms as measured by DIN #53,345, characterised by compounding a latex of a rubbery polymer with up to 500 parts by weight of a particulate filler per 100 parts by weight of said rubbery polymer a vulcanization paste, optionally a gelling system, and frothing the compound and applying it to a substrate; subjecting the foam to conditions which will cause it to set and drying and vulcanizing the foam, and comprising incorporating into the compound at least 4 parts by dry weight per 100 parts by weight of said rubbery polymer of a dispersion of carbon black stabilized by a soap predominantly of the same type as that compatible with the process used to set the foam.
Claim 2
Independent Claim
134 words
A method for the production of conductive foam having a surface resistance of not more than 9.9x10¹⁰ ohms as measured by DIN #53,345, characterised by compounding a latex of a rubbery polymer with up to 500 parts by weight of a particulate filler per 100 parts by weight of said rubbery polymer a vulcanization paste, optionally a gelling system, and frothing the compound and applying it to a substrate; subjecting the foam to conditions which will cause it to set and drying and vulcanizing the foam, and comprising incorporating into the compound at least 4 parts by dry weight per 100 parts by weight of said rubbery polymer of a dispersion of carbon black stabilized by a soap predominantly of the same type as that compatible with the process used to set the foam.
Claim 3
Dependent Claim
323 words
A process as in claim 1, characterised by said latex contains from 40 to 75 weight percent of one or more rubbery polymers selected from the group consisting of: (i) synthetic polymers of up to 50 weight percent of one or more monomers selected from the group consisting of C 8-12 vinyl aromatic monomers which may be unsubstituted or substituted by a C 1-4 alkyl radical or a chlorine or bromine atom; C 1-4 alkyl and hydroxy alkyl acrylates; C 1-4 alkyl and hydroxy alkyl methacrylates, and C 2-6 alkenyl nitriles; at least 50 weight percent of C 4-6 conjugated diolefin which may be unsubstituted or substituted by a chlorine atom; and optionally up to 10 weight percent of one or more monomers selected from the group consisting of: (a) C 3-6 ethylenically unsaturated carboxylic acids; (b) amides of C 3-6 ethylenically unsaturated carboxylic acids, which amides may be unsubstituted or substituted at the nitrogen atom by up to two radicals selected from the group consisting of C 1-4 alkyl radicals and C 1-4 hydroxy alkyl radicals. (ii) natural rubber; (iii) a mixture of (i) or (ii) with not more than 20 weight percent of a polymer of not less than 60 weight percent of a C 8-12 vinyl aromatic monomer which may be unsubstituted or substituted by a C 1-4 alkyl radical or a chlorine or bromine atom; not more than 40 weight percent of a C 4-6 conjugated diolefin; and from 0.5 to 5 weight percent of one or more monomers selected from the group consisting of C 3-6 ethylenically unsaturated carboxylic acids; C 3-6 ethylenically unsaturated aldehydes; C 1-4 alkyl or hyroxy alkyl esters of C 3-6 ethylenically unsaturated carboxylic acids and amides of C 3-6 ethylenically unsaturated carboxylic acids which amides may be unsubstituted or substituted at the nitrogen atom by up to two members selected from the group consisting of C 1-4 alkyl and C 1-4 hydroxy-alkyl radicals.
Claim 4
Dependent Claim
35 words
A process as in claim 2,characterised by said gelling agent is absent and said soap is a synthetic emulsifier selected from the group consisting of sulfosuccinamates, C 8-20 alkyl sulfates and C 8-20 alkyl sulfonates.
Claim 5
Dependent Claim
28 words
A process as in claim 3,characterised by said filler is present in an amount up to 250 parts by weight per 100 parts by weight of rubbery polymer.
Claim 6
Dependent Claim
55 words
A process as in claim 2,characterised by said gelling agent is present and said soap is selected from the group consisting soaps of C 8-20 saturated and unsaturated carboxylic acids and rosin acids and said filler is present in an amount up to 170 parts by weight per 100 parts by weight of rubbery polymer.
Claim 7
Dependent Claim
29 words
A process as in claim 5, characterised by said filler is present in an amount less than 150 parts by weight per 100 parts by weight of rubbery polymer.
Claim 8
Dependent Claim
32 words
A process as in claim 6,characterised by adding to said compound up to 2 parts by dry weight per 100 parts by weight of compound of an alkali metal salt of silicofluoride.
Claim 9
Dependent Claim
68 words
A process as in claim 6,characterised by adding to said compound a zinc or cadmium compound in an amount sufficient to provide from 0.5 to 10 parts by weight of zinc or cadmium ions per 100 parts by weight of rubbery polymer and sufficient ammonia or ammonium ion releasing compound to provide from 0.1 to 4.0 parts of ammonia or ammonium ion per 100 parts of rubbery polymer.
Claim 10
Dependent Claim
47 words
A process as in claim 7,characterised by adding to said compound up to 3 parts by weight per 100 parts by weight of rubbery polymer of a compound selected from the group consisting of ammonium sulphamate, ammonium sulphate, C 1-4 amide sulphamates, and C 1-4 amine sulfates.
Claim 11
Dependent Claim
47 words
A process as in claim 8,characterised by adding to said compound up to 3 parts by weight per 100 parts by weight of rubbery polymer of a compound selected from the group consisting of ammonium sulphamate, ammonium sulphate, C 1-4 amide sulphamates, and C 1-4 amine sulfates.
Claim 12
Dependent Claim
32 words
A process as in claim 9,characterised by said carbon black emulsion contains up to 100 parts by weight per 100 parts by weight of carbon black of an emulsion of paraffin wax.
Claim 13
Dependent Claim
32 words
A process as in claim 10,characterised by said carbon black emulsion contains up to 100 parts by weight per 100 parts by weight of carbon black of an emulsion of paraffin wax.
Claim 14
Dependent Claim
30 words
A process as in claim 11,characterised by said substrate is selected from the group consisting of the back of a carpet, paper, a non woven, textiles and a release substrate.
Claim 15
Dependent Claim
29 words
A process as in claim 12,characterised by said substrate is selected from the group consisting of the back of carpet, paper, a non woven, textiles and a release substrate.
Claim 16
Dependent Claim
14 words
A conductive foam prepared by a process according to Claim 1, 3 or 5.
Claim 17
Dependent Claim
14 words
A conductive foam prepared by a process according to Claim 8, 9 or 10.
References Cited (Backward Citations)
No citation records indexed.
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