A conductive polyester composition is provided, which includes a polyester base material and a conductive reinforcing material. The conductive reinforcing material includes a plurality of carbon nanotubes, and the plurality of carbon nanotubes are dispersed in the polyester base material. In each of the carbon nanotubes, a length of the carbon nanotube is defined as L, a diameter of the carbon nanotube is defined as D and is between 1 nanometer and 30 nanometers, and an L/D value of the carbon nanotube is between 300 and 2,000. The plurality of carbon nanotubes are in contact with each other to form a plurality of contact points, so that the conductive polyester composition has a surface impedance of not greater than 10.sup.7 Ω/sq.

A conductive polyester composition is provided, which includes a polyester base material and a conductive reinforcing material. The conductive reinforcing material includes a plurality of carbon nanotubes, and the plurality of carbon nanotubes are dispersed in the polyester base material. In each of the carbon nanotubes, a length of the carbon nanotube is defined as L, a diameter of the carbon nanotube is defined as D and is between 1 nanometer and 30 nanometers, and an L/D value of the carbon nanotube is between 300 and 2,000. The plurality of carbon nanotubes are in contact with each other to form a plurality of contact points, so that the conductive polyester composition has a surface impedance of not greater than 10.sup.7 Ω/sq.

A conductive polyester composition is provided, which includes a polyester base material and a conductive reinforcing material. The conductive reinforcing material includes a plurality of carbon nanotubes, and the plurality of carbon nanotubes are dispersed in the polyester base material. In each of the carbon nanotubes, a length of the carbon nanotube is defined as L, a diameter of the carbon nanotube is defined as D and is between 1 nanometer and 30 nanometers, and an L/D value of the carbon nanotube is between 300 and 2,000. The plurality of carbon nanotubes are in contact with each other to form a plurality of contact points, so that the conductive polyester composition has a surface impedance of not greater than 10.sup.7 Ω/sq.

A liquid color masterbatch composition for fabricating a colored fiber includes 30.0 to 44.4 parts by weight of a colorant, 14.0 to 44.4 parts by weight of a lubricant, and 11.2 to 56.0 parts by weight of a carrier, in which a viscosity of the liquid color masterbatch composition between 13000 cP and 18000 cP.

A liquid color masterbatch composition for fabricating a colored fiber includes 30.0 to 44.4 parts by weight of a colorant, 14.0 to 44.4 parts by weight of a lubricant, and 11.2 to 56.0 parts by weight of a carrier, in which a viscosity of the liquid color masterbatch composition between 13000 cP and 18000 cP.

A medical tube is provided. The medical tube includes a hollow body and a gas conduit formed inside the hollow body for transporting gases. A material of the hollow body is a thermoplastic polyester elastomer. Based on a total weight of the thermoplastic polyester elastomer being 100 wt %, the thermoplastic polyester elastomer includes 50 wt % to 70 wt % of hard segments and 30 wt % to 50 wt % of soft segments.

A medical tube is provided. The medical tube includes a hollow body and a gas conduit formed inside the hollow body for transporting gases. A material of the hollow body is a thermoplastic polyester elastomer. Based on a total weight of the thermoplastic polyester elastomer being 100 wt %, the thermoplastic polyester elastomer includes 50 wt % to 70 wt % of hard segments and 30 wt % to 50 wt % of soft segments.

Disclosed herein is a silane-functional hardener for carboxyl-functional resins including at least one monomer and/or oligomer and/or polymer having at least one group represented by Formula I-(a) and/or Formula I-(b) and at least one group represented by Formula II-(a) and/or Formula II-(b):

##STR00001##

where, R.sub.1, R.sub.2 and R.sub.3 independently represent a C1-C18 alkyl group, C1-C6 alkoxyl group, phenyl group, aryl group, hydrogen atom, chlorine atom or fluorine atom and at least one of R.sub.1, R.sub.2 and R.sub.3 is a C1-C6 alkoxyl group, R.sub.4 represents a C1-C18 alkyl group, C1-C6 alkanol group, C1-C6 alkoxyl group, or hydrogen atom, R.sub.5 represents a hydrogen atom, C1-C18 alkyl group, or C1-C6 alkoxyl group, R.sub.6 represents a C2-C6 acyl group, C1-C18 alkylene group or arylene group and R.sub.7 represents a —NR.sub.4— group, C2-C6 acyl group, C1-C18 alkylene group, C1-C18 alkoxy group or arylene group.

Disclosed herein is a silane-functional hardener for carboxyl-functional resins including at least one monomer and/or oligomer and/or polymer having at least one group represented by Formula I-(a) and/or Formula I-(b) and at least one group represented by Formula II-(a) and/or Formula II-(b):

##STR00001##

where, R.sub.1, R.sub.2 and R.sub.3 independently represent a C1-C18 alkyl group, C1-C6 alkoxyl group, phenyl group, aryl group, hydrogen atom, chlorine atom or fluorine atom and at least one of R.sub.1, R.sub.2 and R.sub.3 is a C1-C6 alkoxyl group, R.sub.4 represents a C1-C18 alkyl group, C1-C6 alkanol group, C1-C6 alkoxyl group, or hydrogen atom, R.sub.5 represents a hydrogen atom, C1-C18 alkyl group, or C1-C6 alkoxyl group, R.sub.6 represents a C2-C6 acyl group, C1-C18 alkylene group or arylene group and R.sub.7 represents a —NR.sub.4— group, C2-C6 acyl group, C1-C18 alkylene group, C1-C18 alkoxy group or arylene group.

An aqueous white conductive primer coating composition, includes: a binder component (A); and a carbon nanotube dispersion liquid (B); and a coating film formed by the aqueous white conductive primer coating composition has an L* value of whiteness based on a CIE color-matching function of 80 or more and a surface resistivity of 10.sup.8 Ω/□ or less.