US4853154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low smoke polypropylene insulation compositions
Assignee: Shell USA Inc
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Filing: 1987-07-27
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Granted: 1989-08-01
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Expires: 2007-07-27
Abstract
Abstract This invention relates to a resin composition comprising polypropylene, a hydrogenated mono alkylarene-conjugated diene block copolymer, oil, and a filler which has been treated with a coupling agent, which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high ultimate elongation and is relatively easy to process.
Inventors
- 👤 Ronald D. Icenogle
- 👤 Lie K. Djiauw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:33
CPC Classifications
C; C08; C08F; C08F287/00; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L51/00; C08L51/006; C08L53/00; C08L53/02; C08L53/025; C09; C09D; C09D151/00; C09D151/006; C09D153/00; C09D153/02; C09D153/025; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; C08L2203/00; C08L2203/20; C08L2203/202; C08L91/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
An electrically conductive wire extrusion coated with a flame retardant insulation composition comprising: (a) 15-20 percent by weight of a hydrogenated styrene-butadiene-styrene block copolymer; (b) 4-8 percent by weight of a plasticizer; (c) 4-8 percent by weight of polypropylene; (d) 63-75 percent by weight of a hydrated magnesium hydroxide which has been surface treated with a coupling agent, wherein the magnesium hydroxide has a mean particle size of about 0.6 to about 1.2 microns and a crystallite aspect ratio greater than 4.
Claim 2
Dependent Claim
82 words
An electrically conductive wire extrusion coated with a flame retardant insulation composition comprising: (a) 15-20 percent by weight of a hydrogenated styrene-butadiene-styrene block copolymer; (b) 4-8 percent by weight of a plasticizer; (c) 4-8 percent by weight of polypropylene; (d) 63-75 percent by weight of a hydrated magnesium hydroxide which has been surface treated with a coupling agent, wherein the magnesium hydroxide has a mean particle size of about 0.6 to about 1.2 microns and a crystallite aspect ratio greater than 4.
Claim 3
Dependent Claim
15 words
The wire of claim 1 wherein the polypropylene has a functional group grafted to it.
Claim 4
Dependent Claim
12 words
The wire of claim 3 wherein the functional group is maleic anhydride.
Claim 5
Dependent Claim
15 words
The wire of claim 3 wherein the coupling agent is a fatty acid metal salt.
Claim 6
Dependent Claim
12 words
The wire of claim 1 wherein the coupling agent is an oleate.
Claim 7
Dependent Claim
12 words
The wire of claim 1 wherein the coupling agent is a stearate.
Claim 8
Dependent Claim
12 words
The wire of claim 1 wherein the coupling agent is a maleate.
Claim 9
Dependent Claim
12 words
The wire of claim 1 wherein the coupling agent is a silane.
Claim 10
Dependent Claim
12 words
The wire of claim 1 wherein the coupling agent is a titanate.
Claim 11
Dependent Claim
12 words
The wire of claim 1 wherein the coupling agent is a zirco-aluminate.
Claim 12
Dependent Claim
11 words
The wire claim 1 wherein the plasticizer is a mineral oil.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |