US3856726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic compound of polybutene-1
Assignee: Huels AG
•
Filing: 1972-09-14
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Granted: 1974-12-24
•
Expires: 1992-09-14
Abstract
Abstract Dielectric constant and long-term hydrostatic strength properties of polybutene-1 high-tension cable insulation are improved by the presence therein of up to 1% by weight of magnesium oxide or other water insoluble magnesium compound and up to 1% by weight of a phenolic antioxidant, which improvement is further enhanced by up to 10% by weight of a paraffin of a molecular weight of 400 - 10,000.
Inventors
- 👤 G Jaenichen
- 👤 G Menzel
- 👤 E Seidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:07
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/13
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A THERMOPLASTIC POLYBUTENE-1 COMPOSITION CONSISTING ESSENTIALLY OF AN ADMIXTURE OF SOLID POLYBUTENE-1 AND AN AMOUNT OF UP TO 1% BY WEIGHT OF A WATER-INSOLUBLE MAGNESIUM COMPOUND HAVING A SOLUBILITY IN WATER OF LESS THAN ABOUT 1 X 10**-3 AT ROOM TEMPERATURE AND AN AMOUNT OF UP TO 1% BY WEIGHT OF A PHENOLIC ANTIOXIDANT FOR POLYOLEFINS EFFECTIVE TO IMPROVE THE HIGH-TENSION INSULATING PROPERTIES OF THE POLYBUTENE-1, SUBSTANTIALLY FREE FROM OTHER ORGANIC COMPOUNDS.
Claim 2
Dependent Claim
72 words
A THERMOPLASTIC POLYBUTENE-1 COMPOSITION CONSISTING ESSENTIALLY OF AN ADMIXTURE OF SOLID POLYBUTENE-1 AND AN AMOUNT OF UP TO 1% BY WEIGHT OF A WATER-INSOLUBLE MAGNESIUM COMPOUND HAVING A SOLUBILITY IN WATER OF LESS THAN ABOUT 1 X 10**-3 AT ROOM TEMPERATURE AND AN AMOUNT OF UP TO 1% BY WEIGHT OF A PHENOLIC ANTIOXIDANT FOR POLYOLEFINS EFFECTIVE TO IMPROVE THE HIGH-TENSION INSULATING PROPERTIES OF THE POLYBUTENE-1, SUBSTANTIALLY FREE FROM OTHER ORGANIC COMPOUNDS.
Claim 3
Dependent Claim
17 words
A polybutene-1 composition according to claim 1 containing 0.01 - 0.1% by weight of the magnesium compound.
Claim 4
Dependent Claim
14 words
A polybutene-1 composition according to claim 1 wherein the magnesium compound is magnesium oxide.
Claim 5
Dependent Claim
14 words
A polybutene-1 composition according to claim 1 wherein the magnesium compound is magnesium hydroxide.
Claim 6
Dependent Claim
17 words
A polybutene-1 composition according to claim 1 wherein the magnesium compound is magnesium stearate, laurate or palmitate.
Claim 7
Dependent Claim
19 words
A polybutene-1 composition according to claim 1 wherein the phenolic antioxidant is tetrakis(methylene-(4-hydroxy-3,5-di-tert.-butyl)-hydrocinnamate); n-octadecyl- delta -(4-hydroxy-3,5-di-tert.-butylphenyl)-propionate; 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert.-butyl-4-hydroxybenzyl)-benzene; or 2,6-di-tert.-butyl-p-cresol.
Claim 8
Dependent Claim
27 words
A polybutene-1 composition according to claim 1 wherein the polybutene-1 has a molecular weight of from about 500,000 to 3, 000,000 and is 90-99.5% diethyl ether insoluble.
Claim 9
Dependent Claim
20 words
A polybutene-1 composition according to claim 7 wherein the magnesium compound is magnesium oxide and the phenolic antioxidant is tetrakis(methylene-(4-hydroxy-3,5-di-tert.-butyl)-hydrocinnamate).
Claim 10
Dependent Claim
27 words
A polybutene-1 composition according to claim 1 wherein the polybutene-1 has a molecular weight of from about 500,000 to 3, 000,000 and is 90-99.5% diethyl ether insoluble.
Claim 11
Dependent Claim
15 words
A polybutene-1 composition according to claim 1 wherein the phenolic antioxidant is a para-substituted 2,6-di-tert.-butyl-phenol.
Claim 12
Dependent Claim
32 words
A polybutene-1 composition according to claim 10 wherein the magnesium compound is selected from the group consisting of magnesium oxide, magnesium hydroxide, a magnesium salt of a fatty acid and magnesium silicate.
References Cited (Backward Citations)
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US3717608A
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |