Highly thermally conductive thermoplastic resin composition and thermoplastic resin

A thermoplastic resin composition comprising:

• an inorganic filler having a thermal conductivity of not less than 20 W/m·K;
• and
• a thermoplastic resin whose main chain contains a repeating unit represented by the general formula (2):
• -A1-x-A2-O—CO—R——CO—O—. . . (2)
• the thermoplastic resin having a thermal conductivity of not less than 0.45 W/m·K;
• wherein each of A1 and A2 independently represents a substituent group selected from the group consisting of an aromatic group, a condensed aromatic group, and an alicyclic heterocyclic group;
• x represents a direct bond;
• and R represents a bivalent substituent group which has a main chain length of 2 to 20 atoms and may be branched, wherein:
• a part of the general formula (2) which part corresponds to -A1-x-A2- is a mesogenic group represented by the general formula (3):
• wherein X independently represents an aliphatic hydrocarbon group, F, Cl, Br, I, CN, or NO2;
• n represents an integer of 0 to 4;
• and
• m represents an integer of 2 ;
• and
• R of the general formula (2) is a linear aliphatic hydrocarbon chain.

A thermoplastic resin comprising, in its main chain, substantially only a repeating unit represented by the general formula (2):

• -A1-x-A2-O—CO—R—CO—O— . . . (2)
• the thermoplastic resin having a thermal conductivity of not less than 0.45 W/m·K;
• wherein each of A1 and A2 independently represents a substituent group selected from the group consisting of an aromatic group, a condensed aromatic group, and an alicyclic heterocyclic group;
• x represents a direct bond;
• and R represents a bivalent substituent group which has a main chain length of 2 to 20 atoms and may be branched,
• wherein a part of the thermoplastic resin which part corresponds to -A1-x-A2- is a mesogenic group represented by the general formula (3):
• wherein X independently represents an aliphatic hydrocarbon group, F, Cl, Br, I, CN, or NO2;
• n represents an integer of 0 to 4;
• and m represents an integer of 2, and
• the thermoplastic resin containing, in a resin component thereof, lamellar crystals in a ratio of not less than 10 vol% to the resin component.

A thermoplastic resin comprising, in its main chain, a repeating unit represented by the general formula (2):

• -A1-x-A2-O—CO—R—CO—O— . . . (2)
• the thermoplastic resin having a thermal conductivity of not less than 0.45 W/m·K;
• wherein each of Al and A2 independently represents a substituent group selected from the group consisting of an aromatic group, a condensed aromatic group, and an alicyclic heterocyclic group;
• x represents a direct bond;
• and R represents a bivalent substituent group which has a main chain length of 2 to 20 atoms and may be branched;
• wherein:
• a part of the general formula (2) which part corresponds to -A1-x-A2- is a mesogenic group represented by the general formula (3):
• wherein X independently represents an aliphatic hydrocarbon group, F, Cl, Br, I, CN, or NO2;
• n represents an integer of 0 to 4;
• and m represents an integer of 2 ;
• R of the general formula (2) is a linear aliphatic hydrocarbon chain;
• and
• the thermoplastic resin contains, in a resin component thereof, lamellar crystals in a ratio of not less than 10 vol% to the resin component.