초록 ▼

The disclsoure describes an electric conductor having a coating layer with the property of strippability so that it can be stripped from the electric conductor, and a method for controlling the strippability of the coating layer from the electric conductor, with the electrical insulation properties

The disclsoure describes an electric conductor having a coating layer with the property of strippability so that it can be stripped from the electric conductor, and a method for controlling the strippability of the coating layer from the electric conductor, with the electrical insulation properties of the cable coating being kept constant after exposure to moisture. The method involves adding to a polymeric composition forming the coating layer a predetermined amount of a polyolefinic compound, which contains at least one unsaturation and at least one carboxyl group in the polymer chain.

대표청구항 ▼

1. A method for controlling the strippability of a coating layer on an electrical conductor comprising adding to a composition forming said coating layer, a predetermined amount of a polyolefinic compound which contains at least one unsaturation and at least one carboxyl group in the polymer chain;

1. A method for controlling the strippability of a coating layer on an electrical conductor comprising adding to a composition forming said coating layer, a predetermined amount of a polyolefinic compound which contains at least one unsaturation and at least one carboxyl group in the polymer chain; wherein said strappability is controlled by the addition of the polyolefinic compound; and wherein the electrical insulation properties of said coating layer are kept constant after exposure to moisture. 2. The method of claim 1 where said polyolefinic compound which contains at least one unsaturation and at least one carboxyl group in the polymer chain is derived from the polymerization of a diene or polyene monomer containing from 4 to 16 carbon atoms, with a compound containing at least one carboxyl group and at least one unsaturation. 3. The method of claim 2 wherein said diene or polyene monomers are butadiene, pentadiene, hexadiene, hexatriene, heptadiens, heptatriene, octadiene, octatriene, and mixtures thereof. 4. The method of claim 3 where said diene or polyene monomers are 1,3-butadiene, 1,3-pentadiene, 1,4-pentadiene, 1,3-hexadiene, 1,4-hexadiene, 1,5-hexadiene, or 2,4-hexadiene. 5. The method of claim 3 where said polyolefinic compound has a polymerization number of 10 to 1000. 6. The method of claim 5 where said polyolefinic compound has a polymerization number of 20 to 50. 7. The method of claim 6 wherein said monomer is 1,3-butadiene. 8. The method of one of claim 2,3,4 or7 wherein said carboxlyated compound is an anhydride of an unsaturated carboxylic or unsaturated dicarboxylic acid. 9. The method of claim 8 including an organo silane having functionalities which interact with said polymeric composition. 10. The method of claim 9 where said silane is &ggr;-methacryloxypropyltrimethoxysilane, methyltriethoxysilane, methyltrls (2-methoxyethoxy)silane, dimethyldiethoxysilane, vinyltris(2-methoxyethoxy)silane, vinyltrimethoxysilane, vinyltriethoxysilane, octyltriethoxysilane, isobutyltriethoxysilane, and isobutyltrimethoxysilane, and mixtures thereof. 11. The method of claim 9 wherein said silane is present in an amount between 0.05 percent and 1.5 percent by weight of said polymeric composition. 12. The method of claim 8 wherein the ratio of said at least one carboxyl group to said at least one unsaturation ranges from 1:10 to 1:100 in said polyolefinic compound which contains at least one unsaturation and at least one carboxyl group in the polymer chain. 13. The method of claim 12 wherein said polyolefinic compound contains at least one unsaturation and at least one carboxyl group in the polymer chain is present in an amount from less than 20% by weight to greater than 1% by weight in said polymeric composition. 14. The method of claim 8 wherein the ratio of said at least one carboxyl group to said at least one unsaturation ranges from 1:10 to 1:50 in said polyolefinic compound which contains at least one unsaturation and at least one carboxyl group in the polymer chain. 15. The method of claim 14 wherein said polyolefinic compound contains at least one unsaturation and at least one carboxyl group in the polymer chain is present in an amount from less than 20% by weight to greater than 1% by weight in said polymeric composition. 16. The method of one of claims2,3,4 and7 where said carboxlyated compound is maleic an hydride. 17. The method of one of claims2,3,4, or7 wherein said carboxlyated compound is benzoic anhydride. 18. The method of one of claim 2,3,4 or7 wherein said carboxylated compound is acetic anhydride.