Abstract: Provided is a polymer having repeating units composed of only repeating units represented by the following Formula (1). —N(R?)—R—N(R?)— is a structure derived from a dimer diamine which is unsubstituted or substituted with a substituent, and R?, R1, and R2 are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms which is unsubstituted or substituted with a substituent, or a heterocyclic aromatic group having 3 to 20 carbon atoms which is unsubstituted or substituted with a substituent.

Abstract: A composition includes a polymer containing a repeating unit represented by Formula (1). —N(R?)—R3—N(R?)— is a structure derived from a dimer diamine that is unsubstituted or substituted by a substituent, R?, R1, and R2 each are independently a hydrogen atom, a halogen atom, a hydrocarbon group that is unsubstituted or substituted by a substituent and has 1 to 20 carbon atoms, a heterocyclic aliphatic group that is unsubstituted or substituted by a substituent and has 3 to 20 carbon atoms, or a heterocyclic aromatic group that is unsubstituted or substituted by a substituent and has 3 to 20 carbon atoms, and —NR1R2 may be a nitrogen-containing heterocyclic group which has 5 to 20 ring-constituting atoms and in which R1 and R2 are bonded to each other.

Abstract: A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.

Abstract: The circuit board according to the present invention includes a wiring portion and a non-wiring portion, the wiring portion having a metal layer and a resin layer, the non-wiring portion having a resin layer, the resin layer at a frequency 10 GHZ having a relative permittivity of from 2 to 3 at 23° C., and the circuit hoard satisfying a relationship: (A?B)/B?0.1 wherein A is the maximum value of the thickness in the wiring portion (?m) and B is the minimum value of the thickness in the non-wiring portion (?m).

Abstract: The circuit board according to the present invention includes a wiring portion and a non-wiring portion, the wiring portion having a metal layer and a resin layer, the non-wiring portion having a resin layer, the resin layer at a frequency 10 GHZ having a relative permittivity of from 2 to 3 at 23° C., and the circuit hoard satisfying a relationship: (A?B)/B?0.1 wherein A is the maximum value of the thickness in the wiring portion (?m) and B is the minimum value of the thickness in the non-wiring portion (?m).

Abstract: A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.

Abstract: A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.

Abstract: An object of the present invention is to provide a photosensitive resin composition that can form an insulating film having low dielectric constant and low dielectric loss tangent and undergoing small changes in elongation properties in response to changes in environmental temperature. The photosensitive resin composition of the present invention contains: a polymer (A) having a structural unit (a1) represented by Formula (a1); a crosslinking agent (B); and a photocation generator (C). [R1 is an unsubstituted or substituted nitrogen-containing heteroaromatic ring or an unsubstituted or substituted aromatic hydrocarbon ring; R2 and R3 are each independently an unsubstituted or substituted aromatic hydrocarbon ring; R4 is an unsubstituted or substituted alkyl group having 2 to 20 carbon atoms; R5 is an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms; and X's are each independently an oxygen atom, a sulfur atom, an ester bond, an amide bond, or —SO2—.

Abstract: Provided is a high-frequency circuit laminate that can reduce the transmission loss of electrical signals in high-frequency circuits and produce circuit boards with excellent smoothness. The high-frequency circuit laminate according to the present invention includes a metal layer and a resin layer which are laminated in contact with each other, the resin layer having an elastic modulus from 0.1 to 3 GPa, and the resin layer having an dielectric loss tangent from 0.001 to 0.01 and a relative permittivity from 2 to 3 at a frequency of 10 GHz at 23° C.

Abstract: A photosensitive resin composition contains: a polymer (A) having a terminal group represented by Formula (a1) and a repeating structural unit represented by Formula (a2); a crosslinking agent (B); and a photocation generator (C). Y represents a reactive group that reacts with the crosslinking agent (B) by action of a cation generated from the photocation generator (C) upon light irradiation; each X independently represents an oxygen atom, a sulfur atom, an ester bond, an amide bond, or —SO2—; R1 represents a divalent hydrocarbon group or a divalent group in which a functional group other than the reactive group and heterocycles is introduced into the divalent hydrocarbon group; and R2 represents a divalent hydrocarbon group, a divalent group in which a functional group other than the reactive group and heterocycles is introduced into the divalent hydrocarbon group, or a heterocycle-containing group that does not have the reactive group.

Abstract: A polymer, includes a first structural unit represented by formula (1), a second structural unit represented by formula (2-1), formula (2-2), or both, and a third structural unit represented by formula (3-1), formula (3-2), or both. The polymer preferably has a weight-average molecular weight in terms of polystyrene of 500 or more and 400,000 or less. A composition includes the polymer and an organic solvent. A molded body includes the polymer.

Abstract: To provide a circuit board that has excellent smoothness and capable of reducing a transmission loss of a high-frequency electrical signal. The circuit board according to the present invention includes a wiring portion and a non-wiring portion, the wiring portion having a metal layer and a resin layer, the non-wiring portion having a resin layer, the resin layer at a frequency 10 GHz having a relative permittivity of from 2 to 3 at 23° C., and the circuit board satisfying a relationship: (A?B)/B?0.1 wherein A is the maximum value of the thickness in the wiring portion (?m) and B is the minimum value of the thickness in the non-wiring portion (?m).

Abstract: Provided is a high-frequency circuit laminate that can reduce the transmission loss of electrical signals in high-frequency circuits and produce circuit boards with excellent smoothness. The high-frequency circuit laminate according to the present invention includes a metal layer and a resin layer which are laminated in contact with each other, the resin layer having an elastic modulus from 0.1 to 3 GPa, and the resin layer having an dielectric loss tangent from 0.001 to 0.01 and a relative permittivity from 2 to 3 at a frequency of 10 GHz at 23° C.

Abstract: A polymer, includes a first structural unit represented by formula (1), a second structural unit represented by formula (2-1), formula (2-2), or both, and a third structural unit represented by formula (3-1), formula (3-2), or both. The polymer preferably has a weight-average molecular weight in terms of polystyrene of 500 or more and 400,000 or less. A composition includes the polymer and an organic solvent. A molded body includes the polymer.

Abstract: A polymer includes a first structural unit represented by formula (1-1), (1-2) or (1-3) and a second structural unit represented by formula (2) or (3). In the formulae (1-1) to (1-3), (2) and (3), R1, R10 and R11 each represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group or a cyano group; Zs each represent —O— or —S—; R4s each represent a methylene group or an alkylene group having 2 to 4 carbon atoms; and L represents a divalent group represented by formula (2-1). In the formula (2-1), Ra represents a divalent alicyclic hydrocarbon group having 5 to 30 ring atoms or a divalent fluorinated alicyclic hydrocarbon group having 5 to 30 ring atoms.

Abstract: A polymer includes a first structural unit represented by formula (1-1), (1-2) or (1-3) and a second structural unit represented by formula (2) or (3). In the formulae (1-1) to (1-3), (2) and (3), R1, R10 and R11 each represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group or a cyano group; Zs each represent —O— or —S—; R4s each represent a methylene group or an alkylene group having 2 to 4 carbon atoms; and L represents a divalent group represented by formula (2-1). In the formula (2-1), Ra represents a divalent alicyclic hydrocarbon group having 5 to 30 ring atoms or a divalent fluorinated alicyclic hydrocarbon group having 5 to 30 ring atoms.

Abstract: A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.

Abstract: A polymer includes a first structural unit represented by formula (1-1), (1-2) or (1-3) and a second structural unit represented by formula (2) or (3). In the formulae (1-1) to (1-3), (2) and (3), R1, R10 and R11 each represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group or a cyano group; Zs each represent —O— or —S—; R4s each represent a methylene group or an alkylene group having 2 to 4 carbon atoms; and L represents a divalent group represented by formula (2-1). In the formula (2-1), Ra represents a divalent alicyclic hydrocarbon group having 5 to 30 ring atoms or a divalent fluorinated alicyclic hydrocarbon group having 5 to 30 ring atoms.

Abstract: The polymer includes a first structural unit represented by formula (1), a second structural unit represented by formula (2), and a third structural unit represented by formula (3). R1, R2, R10 and R11 each independently represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group or a cyano group; R3A, R3B R4A and R4B each independently represent a methylene group or an alkylene group having 2 to 4 carbon atoms; ZA to ZD each independently represent —O— or —S—; and L represents a divalent group represented by formula (3-1) or (3-2), wherein Ra represents a divalent alicyclic hydrocarbon group having 5 to 30 ring atoms or a divalent fluorinated alicyclic hydrocarbon group having 5 to 30 ring atoms.

Abstract: A polymer includes a first structural unit represented by formula (1-1), (1-2) or (1-3) and a second structural unit represented by formula (2) or (3). In the formulae (1-1) to (1-3), (2) and (3), R1, R10 and R11 each represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group or a cyano group; Zs each represent —O— or —S—; R4s each represent a methylene group or an alkylene group having 2 to 4 carbon atoms; and L represents a divalent group represented by formula (2-1). In the formula (2-1), Ra represents a divalent alicyclic hydrocarbon group having 5 to 30 ring atoms or a divalent fluorinated alicyclic hydrocarbon group having 5 to 30 ring atoms.