US4655964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive nylon molding materials
Assignee: BASF SE
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Filing: 1985-07-11
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Granted: 1987-04-07
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Expires: 2005-07-11
Abstract
Abstract Conductive molding materials contain (A) from 29 to 76% by weight of one or more linear thermoplastic nylons, (B) from 20 to 50% by weight of finely divided calcined kaolin and/or finely divided calcium metasilicate, which are coated with organosilanes as coupling agents, (C) from 4 to 6% by weight of conductive carbon black having a BET specific surface area >900 m 2 /g and a DBP absorption >300 ml/100 g and, if required, (D) from 0 to 15% by weight of conventional additives in effective amounts, the percentages of A to D summing to 100.
Inventors
- 👤 Rolf Steinberger
- 👤 Johannes Schlag
- 👤 Karl Schlichting
- 👤 Erhard Seiler
- 👤 Sibylle Von Tomkewitsch
- 👤 Hans-Friedrich Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:40
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; C08K9/06; C08K13/00; C08K13/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A conductive molding material containing (A) from 29 to 76% by weight of one or more linear thermoplastic nylons, (B) from 20 to 50% by weight of finely divided calcined kaolin or finely divided calcium metasilicate and mixtures thereof, which are coated with organosilanes as coupling agents, (C) from 4 to 6% by weight of conductive carbon black having a BET specific surface area >900 m 2 /g and a DBP absorption >300 ml/100 g and, if required, (D) from 0 to 15% by weight of conventional additives in effective amounts, the percentages of A to D summing to 100.
Claim 2
Dependent Claim
100 words
A conductive molding material containing (A) from 29 to 76% by weight of one or more linear thermoplastic nylons, (B) from 20 to 50% by weight of finely divided calcined kaolin or finely divided calcium metasilicate and mixtures thereof, which are coated with organosilanes as coupling agents, (C) from 4 to 6% by weight of conductive carbon black having a BET specific surface area >900 m 2 /g and a DBP absorption >300 ml/100 g and, if required, (D) from 0 to 15% by weight of conventional additives in effective amounts, the percentages of A to D summing to 100.
Claim 3
Dependent Claim
33 words
A molding material as set forth in claim 1, which contains calcined kaolin having a particle size of from 0.01 to 10 μm and a BET specific surface area >6 m 2 /g.
Claim 4
Dependent Claim
23 words
A molding material as set forth in claim 1, which contains calcium metasilicate having a particle size of from 0.01 to 30 μm.
Claim 5
Dependent Claim
34 words
A molding material as set forth in claim 1, which contains acicular calcium metasilicate having a particle diameter of from 0.1 to 15 μm and a particle length of from 2 to 90 μm.
Claim 6
Dependent Claim
89 words
A molding material as set forth in claim 1, which contains from 2 to 15% by weight of a non-crosslinked copolymer containing three or more components which consists of (a) from 52 to 79.5% by weight of ethylene, (b) from 20 to 40% by weight of one or more primary or secondary C 2 -C 8 -alkyl esters of (meth)acrylic acid and (c) from 0.5 to 8% by weight of a monomer possessing acidic functional groups or latent acidic functional groups, the components (a) to (c) summing to 100.
Claim 7
Dependent Claim
55 words
A molding material as set forth in claim 1, which contains from 2 to 15% by weight of a partially or completely crosslinked polymer which is prepared by emulsion polymerization and is elastomeric in a particle size distribution with a particle size of less than 2 μm, which is essentially predetermined by the emulsion polymerization.
Claim 8
Dependent Claim
28 words
A molding material as set forth in claim 1, which contains from 5 to 500 ppm, based on the amount of nylon, of copper(I) compounds in homogeneous form.
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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |