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US4840983A
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Anti-treeing additives
Assignee: Dow Silicones Corp
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Filing: 1986-05-23
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Granted: 1989-06-20
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Expires: 2006-05-23
Abstract
Abstract An organosilane of the general formula ##STR1## where R denotes a hydrogen or alkyl radical, n is 2 to 5, Ph denotes an aryl radical, and R' denotes an alkyl radical, and the hydrolysis product, a disiloxane, of said organosilanes with water, where said compounds are useful as anit-treeing additives to polyolefin.
Inventors
- 👤 Gary A. Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:04
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08; C08K; C08K5/00; C08K5/54; C08K5/549; Y; Y02; Y02A; Y02A30/00; Y02A30/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
158 words
An improved electrical cable insulation material comprised of (a) polyolefin (b) an anti-treeing additive chosen from the group consisting of (i) a compound represented by the general formula ##STR9## where each R independently denotes a hydrogen atom, or a saturated hydrocarbon radical; n has a value from 2 to 5; Ph represents an aryl radical; and R' represents an alkyl radical with 1 to 6 carbon atoms; and (ii) a compound represented by the general formula ##STR10## where R" denotes a hydrogen atom or a saturated hydrocarbon radical, Ph denoted an aryl radical, n has a value from 2 to 5, and at least R" and one R'" radical on the oxygen bonded carbon atoms of said general formula denotes an alkyl radical with between 1 and 6 carbon atoms; wherein the polyolefin (a) and the anti-treeing additive (b) are intermixed, and the anti-treeing additive comprises between 0.1 and 5 weight percent of the improved cable insulation material.
Claim 2
Dependent Claim
158 words
An improved electrical cable insulation material comprised of (a) polyolefin (b) an anti-treeing additive chosen from the group consisting of (i) a compound represented by the general formula ##STR9## where each R independently denotes a hydrogen atom, or a saturated hydrocarbon radical; n has a value from 2 to 5; Ph represents an aryl radical; and R' represents an alkyl radical with 1 to 6 carbon atoms; and (ii) a compound represented by the general formula ##STR10## where R" denotes a hydrogen atom or a saturated hydrocarbon radical, Ph denoted an aryl radical, n has a value from 2 to 5, and at least R" and one R'" radical on the oxygen bonded carbon atoms of said general formula denotes an alkyl radical with between 1 and 6 carbon atoms; wherein the polyolefin (a) and the anti-treeing additive (b) are intermixed, and the anti-treeing additive comprises between 0.1 and 5 weight percent of the improved cable insulation material.
Claim 3
Dependent Claim
21 words
The improved electrical cable insulation of claim 1 wherein the polyolefin is noncrosslinked polyethylene, cross-linked polyethylene, polypropylene, or poly(ethylene copropylene) rubber.
Claim 4
Dependent Claim
26 words
The improved electrical cable insulation of claim 2 wherein the anti-treeing additive is present between 0.1 and 4 weight percent of said improved electrical cable insulation.
Claim 5
Dependent Claim
27 words
The improved electrical cable insulation of claim 3 wherein the anti-treeing additive is present between 0.5 and 2 weight percent of said the improved electrical cable insulation.
Claim 6
Independent Claim
73 words
A method for restoring aged undependable electrical cables which comprises providing a fluid comprised of a compound represented by the general formula ##STR11## where R denotes a hydrogen atom, or a saturated hydrocarbon radical; n has a value from 2 to 5; Ph represents an aryl radical; and R' represents an alkyl radical with 1 to 6 carbon atoms to the center cavity of a stranded wire conductor distribution cable having polyolefin insulation.
Claim 7
Independent Claim
73 words
A method for restoring aged undependable electrical cables which comprises providing a fluid comprised of a compound represented by the general formula ##STR11## where R denotes a hydrogen atom, or a saturated hydrocarbon radical; n has a value from 2 to 5; Ph represents an aryl radical; and R' represents an alkyl radical with 1 to 6 carbon atoms to the center cavity of a stranded wire conductor distribution cable having polyolefin insulation.
Claim 8
Dependent Claim
14 words
The method of claim 5 wherein the fluid further comprises a hydrolysis condensation catalyst.
Claim 9
Independent Claim
77 words
A method of rendering electrical cable resistant to electromechanical treeing comprising the step of providing a fluid comprised of a compound represented by the general formula ##STR12## where R denotes a hydrogen atom, or a saturated hydrocarbon radical; n has a value from 2 to 5; Ph represents an aryl radical; and R' represents an alkyl radical with 1 to 6 carbon atoms to the center cavity of a stranded wire conductor distribution cable having polyolefin insulation.
Claim 10
Independent Claim
77 words
A method of rendering electrical cable resistant to electromechanical treeing comprising the step of providing a fluid comprised of a compound represented by the general formula ##STR12## where R denotes a hydrogen atom, or a saturated hydrocarbon radical; n has a value from 2 to 5; Ph represents an aryl radical; and R' represents an alkyl radical with 1 to 6 carbon atoms to the center cavity of a stranded wire conductor distribution cable having polyolefin insulation.
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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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |