Claims
- 1. An electric wire or cable having improved bow-tie tree resistance which is coated with an insulating composition consisting essentially of 100 parts by weight of at least one polymer selected from the group consisting of low-density polyethylene, high-density polyethylene, polybutene, an ethylene-vinyl acetate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-methyl methacrylate copolymer and combinations thereof, (A) 0.005-1.0 part by weight of a metal salt of a fatty acid containing a hydroxyl group in the molecule, and (B) 0.005-1.0 part by weight of a fatty acid, a fatty acid ester, or a fatty acid amide, where the amount of components (A) and (B) used exhibits superior bow-tie tree effects as compared to the use of a corresponding amount of component (A) alone or component (B) alone.
- 2. A bow-tie tree resistant wire or cable according to claim 1, wherein the polymer is a low-density polyethylene.
- 3. A bow-tie tree resistant wire or cable according to claim 1, wherein the polymer is a high-density polyethylene.
- 4. A bow-tie tree resistant wire or cable according to claim 1, wherein the polymer is an ethylene-vinyl acetate copolymer.
- 5. A bow-tie tree resistant wire or cable according to claim 1, wherein the polymer is an ethylene-ethyl acrylate copolymer.
- 6. A bow-tie tree resistant wire or cable according to claim 1, wherein the polymer is a mixture of a low-density polyethylene and an ethylene-vinyl acetate copolymer.
- 7. A bow-tie tree resistant wire or cable according to claim 1, wherein the polymer is a mixture of a low-density polyethylene and an ethylene-ethyl acrylate copolymer.
- 8. A bow-tie tree resistant wire or cable according to claim 1, wherein the metal salt of the fatty acid containing a hydroxyl group in the molecule is calcium hydroxystearate.
- 9. A bow-tie tree resistant wire or cable according to claim 1, wherein the metal salt of the fatty acid containing a hydroxyl group in the molecule is magnesium ricinoleate.
- 10. A bow-tie tree resistant wire or cable according to claim 1, wherein the fatty acid is hydroxystearic acid.
- 11. A bow-tie tree resistant wire or cable according to claim 1, wherein the fatty acid ester is a montanic acid ester.
- 12. A bow-tie tree resistant wire or cable according to claim 1, wherein the fatty acid amide is stearic acid amide.
- 13. A bow-tie tree resistant wire or cable according to claim 1, wherein the fatty acid amide is hydroxystearic acid amide.
- 14. A bow-tie tree resistant wire or cable according to claim 1, wherein the fatty acid amide is N,N'-ethylenebis(hydroxystearic acid)amide.
- 15. A bow-tie tree resistant wire or cable according to claim 1, which further contains 0.01-1.0 part by weight of an antioxidant.
- 16. A bow-tie tree resistant wire or cable according to claim 15, wherein the antioxidant is 4,4'-thiobis(3-methyl-6-tert-butylphenol).
- 17. A bow-tie tree resistant wire or cable according to claim 1, which further contains 1.0-3.0 parts by weight of a crosslinking agent.
- 18. A bow-tie tree resistant wire or cable according to claim 17, wherein the crosslinking agent is dicumyl peroxide.
Priority Claims (2)
Number |
Date |
Country |
Kind |
62-157037 |
Jun 1987 |
JPX |
|
63-75741 |
Mar 1988 |
JPX |
|
Parent Case Info
This is a continuation of application No. 09/154,127, filed Nov. 18, 1993, abandoned, which is a continuation of application Ser. No. 07/210,451, filed Jun. 23, 1988.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3474058 |
Ridgeway et al. |
Oct 1969 |
|
4345046 |
Ejk et al. |
Aug 1982 |
|
4400429 |
Barlow et al. |
Aug 1983 |
|
4871787 |
Yamamoto et al. |
Oct 1989 |
|
Non-Patent Literature Citations (3)
Entry |
Billmeyer, Jr. Fred W., Textbook of Polymer Science, 3rd Ed., John Wiley and Sons, New York, 1984, p. 370. |
Derwent Abstract Accession No. 84-032495/06, J58220304-A (Dec. 1983). |
IEEE Transactions on Power Delivery, vol. PWRD-, No. 1, 1986, New York US, pp. 27-33; K Watanabe et al.: "Development of New Water Tree Suppressive XLPE Cable". |
Continuations (2)
|
Number |
Date |
Country |
Parent |
154127 |
Nov 1993 |
|
Parent |
210451 |
Jun 1988 |
|