Conductive thermoplastic elastomer composition
A conductive thermoplastic elastomer composition includes: a specific elastomer component; a clay; a paraffin oil; and a carbon-based filler having a BET specific surface area of 50 m 2 /g or more, wherein a content ratio of the clay is 20 parts by mass or less relative to 100 parts by mass of the elastomer component, and a content ratio of the paraffin oil is 1 to 65% by mass relative to a total amount of the composition.
1. A conductive thermoplastic elastomer composition comprising:
at least one elastomer component selected from the group consisting of elastomeric polymers (A) each of which has a side chain (a) containing a hydrogen-bond cross-linkable moiety having a carbonyl-containing group and/or a nitrogen-containing heterocycle and has a glass-transition point of 25° C. or below, and elastomeric polymers (B) each of which contains a hydrogen-bond cross-linkable moiety and a covalent-bond cross-linking moiety in a side chain and has a glass-transition point of 25° C. or below;
an organically modified clay;
a paraffin oil; and
a carbon-based filler having a BET specific surface area of 50 m 2 /g or more, wherein
the organically modified clay is a quaternary ammonium salt of a clay, which is a mixture of a dimethylstearylbenzylammonium salt and a dimethyloctadecylammonium salt,
a content ratio of the organically modified clay is 20 parts by mass or less relative to 100 parts by mass of the elastomer component, and
a content ratio of the paraffin oil is 1 to 65% by mass relative to a total amount of the composition.
2. The conductive thermoplastic elastomer composition according to claim 1 , wherein
the carbon-based filler is at least one selected from the group consisting of carbon blacks and carbon nanotubes.
3. The conductive thermoplastic elastomer composition according to claim 1 , wherein
the carbon-based filler has a BET specific surface area of 500 m 2 /g to 2500 m 2 /g.
4. The conductive thermoplastic elastomer composition according to claim 1 , wherein
a content ratio of the carbon-based filler is 0.1 to 50% by mass relative to the total amount of the composition.
5. The conductive thermoplastic elastomer composition according to claim 1 wherein
the clay is montmorillonite.
6. The conductive thermoplastic elastomer composition according to claim 2 , wherein
the carbon-based filler has a BET specific surface area of 500 m 2 /g to 2500 m 2 /g.
7. The conductive thermoplastic elastomer composition according to claim 2 , wherein
a content ratio of the carbon-based filler is 0.1 to 50% by mass relative to the total amount of the composition.
8. The conductive thermoplastic elastomer composition according to claim 3 , wherein
a content ratio of the carbon-based filler is 0.1 to 50% by mass relative to the total amount of the composition.
9. The conductive thermoplastic elastomer composition according to claim 6 , wherein
a content ratio of the carbon-based filler is 0.1 to 50% by mass relative to the total amount of the composition.
10. The conductive thermoplastic elastomer composition according to claim 2 , wherein
the clay is montmorillonite.
11. The conductive thermoplastic elastomer composition according to claim 3 , wherein
the clay is montmorillonite.
12. The conductive thermoplastic elastomer composition according to claim 6 , wherein
the clay is montmorillonite.
13. The conductive thermoplastic elastomer composition according to claim 4 , wherein
the clay is montmorillonite.
14. The conductive thermoplastic elastomer composition according to claim 7 , wherein
the clay is montmorillonite.
15. The conductive thermoplastic elastomer composition according to claim 8 , wherein
the clay is montmorillonite.
16. The conductive thermoplastic elastomer composition according to claim 9 , wherein
the clay is montmorillonite.
17. The conductive thermoplastic elastomer composition according to claim 1 , which has a volume resistivity of 200 Ω·cm or less, and a compression set of 59% or less.