Claims
- 1. A flame retardant and smoke suppressed polymeric thermoplastic composition, which consists of:
- a radiation curable copolymer of ethylene and vinyl acetate containing 50 to 85% by weight of polymerized units derived from vinyl acetate; and
- a flame retarding and smoke suppressing amount of finely divided filler mixture intimately admixed with said copolymer, said filler mixture consisting essentially of a first filler selected from the group consisting of hydroxides and carbonates of di- and tri-valent metals and a second filler which is zinc borate, the ratio by weight of said second filler to the filler mixture being within the range between 0.25 and 0.75.
- 2. The composition according to claim 1, wherein said first filler is aluminum hydroxide.
- 3. The composition according to claim 1, wherein said first filler is magnesium hydroxide.
- 4. The composition according to claim 1, wherein said first filler is calcium hydroxide.
- 5. The composition according to claim 1, wherein said first filler is barium hydroxide.
- 6. The composition according to claim 1, wherein said first filler is magnesium carbonate.
- 7. The composition according to claim 1, wherein said first filler is magnesium calcium carbonate.
- 8. The composition according to claim 1, wherein said first filler is calcium carbonate.
- 9. The composition according to claim 1, wherein said first filler is zinc carbonate.
- 10. The composition according to claim 1, wherein said first filler is barium carbonate.
- 11. In an electric wire comprising a core conductor and a flame retardant and smoke suppressed insulating sheath, the improvement wherein said sheath comprises a smoke suppressed polymeric thermoplastic composition which consists of:
- a radiation cured copolymer of ethylene and vinyl acetate containing 50 to 85% by weight of polymerized units derived from vinyl acetate; and
- a flame retarding and smoke suppressing amount of finely divided filler mixture intimately admixed with said copolymer, said filler mixture consisting essentially of a first filler selected from the group consisting of hydroxides and carbonates of di- and tri-valent metals and a second filler which is zinc borate, the ratio by weight of said second filler to the filler mixture being within the range between 0.25 and 0.75.
- 12. The electric wire according to claim 11, wherein said first filler is aluminum hydroxide.
- 13. The electric wire according to claim 11, wherein said first filler is magnesium hydroxide.
- 14. The electric wire according to claim 11, wherein said first filler is calcium hydroxide.
- 15. The electric wire according to claim 11, wherein said first filler is barium hydroxide.
- 16. The electric wire according to claim 11, wherein said first filler is magnesium carbonate.
- 17. The electric wire according to claim 11, wherein said first filler is magnesium calcium carbonate.
- 18. The electric wire according to claim 11, wherein said first filler is calcium carbonate.
- 19. The electric wire according to claim 11, wherein said first filler is zinc carbonate.
- 20. The electric wire according to claim 11, wherein said first filler is barium carbonate.
- 21. A flame retardant and smoke suppressed polymeric thermoplastic composition, which consists of:
- a radiation curable copolymer of ethylene and vinyl acetate containing 50 to 85% by weight of polymerized units derived from vinyl acetate; and
- a flame retarding and smoke suppressing amount of finely divided filler mixture intimately admixed with said copolymer, said filler mixture consisting of a first filler selected from the group consisting of hydroxides and carbonates of di- and tri-valent metals and a second filler which is zinc borate, the ratio by weight of said second filler to the filler mixture being within the range between 0.25 and 0.75.
- 22. The composition according to claim 21, wherein said first filler is aluminum hydroxide.
- 23. The composition according to claim 21, wherein said first filler is magnesium hydroxide.
- 24. The composition according to claim 21, wherein said first filler is calcium hydroxide.
- 25. The composition according to claim 21, wherein said first filler is barium hydroxide.
- 26. The composition according to claim 21, wherein said first filler is magnesium carbonate.
- 27. The composition according to claim 21, wherein said first filler is magnesium calcium carbonate.
- 28. The composition according to claim 21, wherein said first filler is calcium carbonate.
- 29. The composition according to claim 21, wherein said first filler is zinc carbonate.
- 30. The composition according to claim 21, wherein said first filler is barium carbonate.
- 31. In an electric wire comprising a core wire conductor and a flame retardant and smoke suppressed insulating sheath, the improvement wherein said sheath comprises a smoke suppressed polymeric thermoplastic composition which consists of:
- a radiation cured copolymer of ethylene and vinyl acetate containing 50 to 85% by weight of polymerized units derived from vinyl acetate; and
- a flame retarding and smoke suppressing amount of finely divided filler mixture intimately admixed with said copolymer, said filler mixture consisting of a first filler selected from the group consisting of hydroxides and carbonates of di- and tri-valent metals and a second filler which is zinc borate, the ratio by weight of said second filler to the filler mixture being within the range between 0.25 and 0.75.
- 32. The electric wire according to claim 31, wherein said first filler is aluminum hydroxide.
- 33. The electric wire according to claim 31, wherein said first filler is magnesium hydroxide.
- 34. The electric wire according to claim 31, wherein said first filler is calcium hydroxide.
- 35. The electric wire according to claim 31, wherein said first filler is barium hydroxide.
- 36. The electric wire according to claim 31, wherein said first filler is magnesium carbonate.
- 37. The electric wire according to claim 31, wherein said first filler is magnesium calcium carbonate.
- 38. The electric wire according to claim 31, wherein said first filler is calcium carbonate.
- 39. The electric wire according to claim 31, wherein said first filler is zinc carbonate.
- 40. The electric wire according to claim 31, wherein said first filler is barium carbonate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
57-231308 |
Dec 1982 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 07/240,377 filed Aug. 23, 1988, now abandoned which is a continuation of Ser. No. 06/775,943 filed Sept. 12, 1985, now abandoned, which is a continuation of application Ser. No. 06/564,649 filed Dec. 22, 1983, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4191675 |
Inagaki et al. |
Mar 1980 |
|
4349605 |
Biggs et al. |
Sep 1982 |
|
4426549 |
Natwig |
Jan 1984 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
12093 |
Feb 1978 |
JPX |
Non-Patent Literature Citations (1)
Entry |
The Condensed Chemical Dictionary, Ninth Edition, pp. 772-773. |
Continuations (3)
|
Number |
Date |
Country |
Parent |
240377 |
Aug 1988 |
|
Parent |
775943 |
Sep 1985 |
|
Parent |
564649 |
Dec 1983 |
|