Provided is a conductive film for antennas, in which a conducting film and a substrate made of a polycarbonate resin material containing a polycarbonate resin are laminated, and the polycarbonate resin contains, as main constituent units, a unit (A) represented by the following formula (1) and/or a unit (B) represented by the following formula (2). The conductive film for antennas has low dielectric characteristics and bendability, can form an antenna with a low transmission loss, and has excellent adhesion to the conducting film.

##STR00001##

(In the formula (1), R.sub.1 and R.sub.2 each independently represent an alkyl group having 1 to 6 carbon atoms or a halogen atom, and R.sub.3 and R.sub.4 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a halogen atom.)

##STR00002##

(In the formula (2), R.sup.1 and R.sup.2 each independently represent an alkyl group having 1 to 6 carbon atoms or a halogen atom, R.sup.3 and R.sup.4 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a halogen atom, R.sup.3 represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or a cycloalkyl group having 3 to 20 carbon atoms, and n represents an integer of 0 to 10.)

Polycarbonate polyols are made by copolymerizing carbon dioxide and an alkylene oxide in the presence of a starter compound and a carbonate catalyst. The process is operated in semi-batch mode by combining starter, catalyst and a small amount of alkylene oxide in a reaction vessel, pressurizing the vessel with carbon dioxide, initiating polymerization, and then feeding both carbon dioxide and alkylene oxide to the vessel under polymerization conditions without removal of product until the feeds are completed.

Polycarbonate polyols are made by copolymerizing carbon dioxide and an alkylene oxide in the presence of a starter compound and a carbonate catalyst. The process is operated in semi-batch mode by combining starter, catalyst and a small amount of alkylene oxide in a reaction vessel, pressurizing the vessel with carbon dioxide, initiating polymerization, and then feeding both carbon dioxide and alkylene oxide to the vessel under polymerization conditions without removal of product until the feeds are completed.

The purpose of the present invention is to provide a polyester resin or polyester carbonate resin, which has high refractive index, while achieving an excellent balance between heat resistance and low birefringence. A polyester resin or a polyester carbonate resin, which contains repeating units represented by the following formulae (1) and (2), and wherein the ratio of the repeating unit represented by formula (1) to the repeating unit represented by formula (2) is 15:85 to 85:15. (In formula (1), each of rings Z.sup.1 and Z.sup.2 represents a polycyclic aromatic hydrocarbon group having 9-20 carbon atoms; each of R.sup.1, R.sup.2, R.sup.7 and R.sup.8 independently represents a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R.sup.3-R.sup.6 and R.sup.9-R.sup.16 represents a hydrogen atom or an aliphatic or aromatic substituents; each of j, k, r and s independently represent an integer of 0 or more; and each of m, n, p and q independently represents 1 or 2) (In formula (2), each of R.sup.7, R.sup.8, R.sup.17 and R.sup.18 independently represent a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R.sup.9-R.sup.16 and R.sup.19-R.sup.26 represents a hydrogen atoms or an aliphatic or aromatic substituents; and each of r, s, t and u independently represents an integer of 0 or more.)

The purpose of the present invention is to provide a polyester resin or polyester carbonate resin, which has high refractive index, while achieving an excellent balance between heat resistance and low birefringence. A polyester resin or a polyester carbonate resin, which contains repeating units represented by the following formulae (1) and (2), and wherein the ratio of the repeating unit represented by formula (1) to the repeating unit represented by formula (2) is 15:85 to 85:15. (In formula (1), each of rings Z.sup.1 and Z.sup.2 represents a polycyclic aromatic hydrocarbon group having 9-20 carbon atoms; each of R.sup.1, R.sup.2, R.sup.7 and R.sup.8 independently represents a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R.sup.3-R.sup.6 and R.sup.9-R.sup.16 represents a hydrogen atom or an aliphatic or aromatic substituents; each of j, k, r and s independently represent an integer of 0 or more; and each of m, n, p and q independently represents 1 or 2) (In formula (2), each of R.sup.7, R.sup.8, R.sup.17 and R.sup.18 independently represent a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R.sup.9-R.sup.16 and R.sup.19-R.sup.26 represents a hydrogen atoms or an aliphatic or aromatic substituents; and each of r, s, t and u independently represents an integer of 0 or more.)

Provided is a polycarbonate diol composition comprising a polycarbonate diol represented by a specific formula and a diol component represented by a specific formula, wherein 90% by mol or more of the total quantity of terminal groups is hydroxy groups, a hydroxy value is 10 to 400 mg-KOH/g, a proportion of the polycarbonate diol is 80% by mass or more and 99.90% by mass or less and a proportion of the diol component is 0.10% by mass or more and 20% by mass or less based on 100% by mass in total of the carbonate diol and the diol component.

Provided is a polycarbonate diol composition comprising a polycarbonate diol represented by a specific formula and a diol component represented by a specific formula, wherein 90% by mol or more of the total quantity of terminal groups is hydroxy groups, a hydroxy value is 10 to 400 mg-KOH/g, a proportion of the polycarbonate diol is 80% by mass or more and 99.90% by mass or less and a proportion of the diol component is 0.10% by mass or more and 20% by mass or less based on 100% by mass in total of the carbonate diol and the diol component.

Provided is a polycarbonate diol composition comprising a polycarbonate diol represented by a specific formula and a diol component represented by a specific formula, wherein 90% by mol or more of the total quantity of terminal groups is hydroxy groups, a hydroxy value is 10 to 400 mg-KOH/g, a proportion of the polycarbonate diol is 80% by mass or more and 99.90% by mass or less and a proportion of the diol component is 0.10% by mass or more and 20% by mass or less based on 100% by mass in total of the carbonate diol and the diol component.

A copolymerized polycarbonate resin having, at least, a constituent unit (A) and a constituent unit (B). The constituent unit (A) is derived from a dihydroxy compound. The carbonate constituent unit (B) is derived from a polyoxyalkylene glycol. A weight ratio of the constituent unit (B) derived from a polyoxyalkylene glycol to a weight of the copolymerized polycarbonate resin is preferably more than 20 wt % and 99 wt % or less.

A copolymerized polycarbonate resin having, at least, a constituent unit (A) and a constituent unit (B). The constituent unit (A) is derived from a dihydroxy compound. The carbonate constituent unit (B) is derived from a polyoxyalkylene glycol. A weight ratio of the constituent unit (B) derived from a polyoxyalkylene glycol to a weight of the copolymerized polycarbonate resin is preferably more than 20 wt % and 99 wt % or less.