Anti-static and peroxide-stable molding compounds

Abstract

The invention concerns anti-static, peroxide-stable molding compounds on the basis of polyamides and/or polyesters, whereby the molding compounds are modified with very pure conductive carbon black with a low specific surface area. These anti-static molding compounds can be used for the production of injection-molded or extruded parts and the production of sheets or multi-layer hoses and tubes.

1. An anti-static, peroxide stable molding compound comprising:
 a molding compound selected from the group consisting of polyamides, polyesters, and mixtures thereof, wherein said molding compound is modified with very pure conductive carbon black having a relatively low specific surface area, and wherein said conductive carbon black constitutes from 5 to 25 percent by weight of said anti-static, peroxide stable molding compound.  
 
     
     
       2. An anti-static, peroxide stable molding compound according to  claim 1 , wherein said conductive carbon black has a sulfur content of less than 0.5% by weight. 
     
     
       3. An anti-static, peroxide stable molding compound according to  claim 1 , wherein said conductive carbon black has a sulfur content of 0.1% by weight or less. 
     
     
       4. An anti-static, peroxide stable molding compound according to  claim 1 , said molding compound comprising a polyamide selected from the group consisting of homopolyamides and copolyamides of PA 6, PA 46, PA 66, PA 612, PA 1010, PA 1012, PA 69, PA 11, PA 12, PA 1212, PA 6T, PA 61, PA 12T, PA 121, PA 12/6T, PA 12/61, and mixtures thereof. 
     
     
       5. An anti-static, peroxide stable molding compound according to  claim 1 , said molding compound comprising a polyamide selected from the group consisting of homopolyamides and copolyamides of PA 12. 
     
     
       6. An anti-static, peroxide stable molding compound according to  claim 2 , said molding compound comprising a polyamide selected from the group consisting of homopolyamides and copolyamides of PA 6, PA 46, PA 66, PA 612, PA 1010, PA 1012, PA 69, PA 11, PA 12, PA 1212, PA 6T, PA 61, PA 12T, PA 121, PA 12/6T, PA 12/61, and mixtures thereof. 
     
     
       7. An anti-static, peroxide stable molding compound according to  claim 1 , said molding compound comprising a polyester selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and polybutylene naphthalate, and mixtures thereof. 
     
     
       8. An anti-static, peroxide stable molding compound according to  claim 2 , said molding compound comprising a polyester selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and polybutylene naphthalate, and mixtures thereof. 
     
     
       9. An anti-static, peroxide stable molding compound according to  claim 1  wherein said carbon black is present in an amount in the range of 5 to 25 percent by weight of said molding compound. 
     
     
       10. An anti-static, peroxide stable molding compound according to  claim 2  wherein said carbon black is present in an amount in the range of 5 to 25 percent by weight of said molding compound. 
     
     
       11. An anti-static, peroxide stable molding compound according to  claim 3  wherein said carbon black is present in an amount in the range of 5 to 25 percent by weight of said molding compound. 
     
     
       12. An anti-static, peroxide stable molding compound according to  claim 4  wherein said carbon black is present in an amount in the range of 5 to 25 percent by weight of said molding compound. 
     
     
       13. An anti-static, peroxide stable molding compound according to  claim 1  wherein said carbon black is present in an amount in the range of 15 to 25 percent by weight of said molding compound. 
     
     
       14. An anti-static, peroxide stable molding compound according to  claim 2  wherein said carbon black is present in an amount in the range of 15 to 25 percent by weight of said molding compound. 
     
     
       15. An anti-static, peroxide stable molding compound according to  claim 3  wherein said carbon black is present in an amount in the range of 15 to 25 percent by weight of said molding compound. 
     
     
       16. An anti-static, peroxide stable molding compound according to  claim 4  wherein said carbon black is present in an amount in the range of 15 to 25 percent by weight of said molding compound. 
     
     
       17. An injection molded tubular object comprising a molding compound according to  claim 1 . 
     
     
       18. An injection molded tubular object comprising a molding compound according to  claim 2 . 
     
     
       19. An injection molded tubular object comprising a molding compound according to  claim 4 . 
     
     
       20. An injection molded tubular object comprising a molding compound according to  claim 7 . 
     
     
       21. An extruded tubular object comprising a molding compound according to  claim 1 . 
     
     
       22. An extruded tubular object comprising a molding compound according to  claim 2 . 
     
     
       23. An extruded tubular object comprising a molding compound according to  claim 4 . 
     
     
       24. An extruded tubular object comprising a molding compound according to  claim 7 . 
     
     
       25. A multi-layer extruded tubular object comprising a molding compound according to  claim 1 . 
     
     
       26. A multi-layer extruded tubular object comprising a molding compound according to  claim 2 . 
     
     
       27. A multi-layer extruded tubular object comprising a molding compound according to  claim 4 . 
     
     
       28. A multi-layer extruded tubular object comprising a molding compound according to  claim 7 . 
     
     
       29. A multi-layer thermoplastic composite, comprising:
 (a) a first layer of an anti-static, peroxide stable molding compound comprising a compound selected from the group consisting of polyamides, polyesters, and mixtures thereof, wherein said molding compound being modified with highly purified conductive carbon black having a relatively low specific surface area; and  
 (b) at least one second layer a polyamide molding compound adjacent to said first layer.  
 
     
     
       30. A multi-layer thermoplastic composite according to  claim 29  wherein said first layer comprises a polyester selected from the group consisting of polybutylene terephthalate, polybutylene naphthalate and polyethylene naphthalate. 
     
     
       31. A multi-layer thermoplastic composite according to  claim 29  additionally comprising at least one coupling layer that adhesively binds said first layer to said at least one second layer. 
     
     
       32. A multi-layer thermoplastic composite according to  claim 29 , additionally comprising a barrier layer made of polybutylene terephthalate adjacent to said first layer. 
     
     
       33. An injection molded tubular object comprising a multi-layer thermoplastic composite according to  claim 29 . 
     
     
       34. An injection molded tubular object comprising a multi-layer thermoplastic composite according to  claim 31 . 
     
     
       35. An injection molded tubular object comprising a multi-layer thermoplastic composite according to  claim 32 . 
     
     
       36. An extruded tubular object comprising a multi-layer thermoplastic according to  claim 29 . 
     
     
       37. An extruded tubular object comprising a multi-layer thermoplastic according to  claim 31 . 
     
     
       38. An extruded tubular object comprising a multi-layer thermoplastic according to  claim 32 . 
     
     
       39. A multi-layer polymeric composite tube having an inner layer, said inner layer comprising very pure conductive carbon black having a relatively low specific surface area, so as to render said tube able to conduct static electricity.