Abstract: Provided is a polyimide resin composition and a production method thereof, wherein the polyimide resin composition contains an alicyclic polyimide resin having a structural unit represented by the following general formula (1) and inorganic particles of at least one selected from the group consisting of titanium dioxide, barium titanate, and zirconium oxide, wherein the alicyclic polyimide resin has a glass transition temperature of 260° C. or higher, wherein R1 represents a tetravalent alicyclic hydrocarbon group having a carbon number of from 4 to 22, and R2 represents a divalent aliphatic hydrocarbon group having a carbon number of from 2 to 28 and/or a divalent aromatic hydrocarbon group having a carbon number of from 6 to 27.

Abstract: Provided is a polyimide resin composition and a production method thereof, wherein the polyimide resin composition contains an alicyclic polyimide resin having a structural unit represented by the following general formula (1) and inorganic particles of at least one selected from the group consisting of titanium dioxide, barium titanate, and zirconium oxide, wherein the alicyclic polyimide resin has a glass transition temperature of 260° C. or higher, wherein R1 represents a tetravalent alicyclic hydrocarbon group having a carbon number of from 4 to 22, and R2 represents a divalent aliphatic hydrocarbon group having a carbon number of from 2 to 28 and/or a divalent aromatic hydrocarbon group having a carbon number of from 6 to 27.

Abstract: The present invention provides a polyimide resin composition capable of forming a film having heat resistance and transparency and, in addition thereto, mechanical strength, surface hardness and flex resistance, a polyimide resin, a polyimide film and a laminate. The present invention includes: a polyimide resin composition containing a polyimide resin that has structural units represented by specific structures in a specific ratio, containing silica fine particles; the polyimide resin; a polyimide film; and a laminate.

Abstract: Vibration damping film comprising a composition obtained by dispersing titanium dioxide (Y) and mica flakes (Z) in a polyester resin (X) comprising dicarboxylic acid units and diol units, satisfying conditions (I) to (III), and having a thickness in the range of 20 to 200 ?m : (I) Content of polyester resin (X), titanium dioxide (Y) and mica flakes (Z) in the composition is in the range of 35 to 60% by mass, in the range of 5 to 15% by mass and in the range of 30 to 55% by mass, respectively, (II) Average particle diameter of the mica flakes (Z) in the resin composition is in the range of 5 to 80 ?m, and (III) Elongation at failure point of the resin composition measured according to JIS K7127 is in the range of 30 to 70%.

Abstract: A resin composition for a vibration damping material, comprising a polyester resin mainly formed of a dicarboxylic acid constitutional unit and a diol constitutional unit; and a filler, in which the polyester resin contains: a dicarboxylic acid constitutional unit (A) mainly derived from an aromatic dicarboxylic acid, in particular, isophthalic acid; a diol constitutional unit (B) mainly derived from ethylene glycol; and a constitutional unit (C) formed of an aliphatic dicarboxylic acid, an aliphatic diol, and/or an aliphatic hydroxycarboxylic acid each having 5 or more carbon atoms, and the resin composition contains, as the filler, a flake-like or plate-like filler (D) and a filler (E) made of a particulate metal oxide.

Abstract: Vibration damping film comprising a composition obtained by dispersing titanium dioxide (Y) and mica flakes (Z) in a polyester resin (X) comprising dicarboxylic acid units and diol units, satisfying conditions (I) to (III), and having a thickness in the range of 20 to 200 ?m : (I) Content of polyester resin (X), titanium dioxide (Y) and mica flakes (Z) in the composition is in the range of 35 to 60% by mass, in the range of 5 to 15% by mass and in the range of 30 to 55% by mass, respectively, (II) Average particle diameter of the mica flakes (Z) in the resin composition is in the range of 5 to 80 ?m, and (III) Elongation at failure point of the resin composition measured according to JIS K7127 is in the range of 30 to 70%.

Abstract: Provided is a vibration damping material comprising: a polyester resin containing dicarboxylic acid constitutional units and diol constitutional units; and mica being dispersed in the polyester resin, wherein: (1) a ratio [(A1+B1)/(A0+B0)] of a total of (A1) a number of the dicarboxylic acid constitutional units having an odd number of carbon atoms in a polyester main chain and (B1) a number of the diol constitutional units having an odd number of carbon atoms in the polyester main chain with respect to a total of (A0) a number of total dicarboxylic acid constitutional units and (B0) a number of total diol constitutional units in the polyester resin is in the range of 0.5 to 1; and (2) an average particle diameter calculated from a volume-based particle diameter frequency distribution of the mica in the vibration damping material is 25 to 500 ?m. The damping material has a high versatility, is lightweight, shows an excellent vibration damping property and can be produced easily with a batch mixer.

Abstract: Provided is a vibration damping material, which includes a resin composition obtained by dispersing titanium dioxide (Y) and a mica flake (Z) in a polyester resin (X) containing dicarboxylic acid constitutional units an diol constitutional units, in which: (1) in the polyester resin (X), a ratio of a total of a number of the dicarboxylic acid constitutional units (A1) having an odd number of carbon atoms in a main chain and a number of the diol constitutional units (B1) having an odd number of carbon atoms in a main chain with respect to a total of a number of total dicarboxylic acid constitutional units (A0) and a number of total diol constitutional units (B0), i.e., [(A1+B1)/(A0+B0)] is in a range of 0.5 to 1; and (2) a mass ratio (X:Y:Z) of the polyester resin (X), the titanium dioxide (Y), and the mica flake (Z) is in a range of 15 to 40:5 to 30:30 to 80.

Abstract: Provided are a resin composition for a vibration damping material, including: a polyester resin mainly formed of a dicarboxylic acid constitutional unit and a diol constitutional unit; and a filler, in which the polyester resin contains: a dicarboxylic acid constitutional unit (A) mainly derived from an aromatic dicarboxylic acid, in particular, isophthalic acid; a diol constitutional unit (B) mainly derived from ethylene glycol; a constitutional unit (C) formed of an aliphatic dicarboxylic acid, an aliphatic diol, and/or an aliphatic hydroxycarboxylic acid each having 5 or more carbon atoms; and a flake-like or plate-like filler (D) and a filler (E) made of a particulate metal oxide as the filler; and a vibration damping material. Thus, there can be provided a vibration damping material exerting high vibration damping performance in a wide temperature region and being excellent in toughness and processability.

Abstract: Provided is a vibration damping material, which includes a resin composition obtained by dispersing titanium dioxide (Y) and a mica flake (Z) in a polyester resin (X) containing dicarboxylic acid constitutional units and diol constitutional units, in which: (1) in the polyester resin (X), a ratio of a total of a number of the dicarboxylic acid constitutional units (A1) having an odd number of carbon atoms in a main chain and a number of the diol constitutional units (B1) having an odd number of carbon atoms in a main chain with respect to a total of a number of total dicarboxylic acid constitutional units (A0) and a number of total diol constitutional units (B0), i.e., [(A1+B1)/(A0+B0)] is in a range of 0.5, to 1; and (2) a mass ratio (X:Y:Z) of the polyester resin (X), the titanium dioxide (Y), and the mica flake (Z) is in a range of 15 to 40:5 to 30:30 to 80.

Abstract: Provided is a vibration damping material comprising: a polyester resin containing dicarboxylic acid constitutional units and diol constitutional units; and mica being dispersed in the polyester resin, wherein: (1) a ratio [(A1+B1)/(A0+B0)] of a total of (A1) a number of the dicarboxylic acid constitutional units having an odd number of carbon atoms in a polyester main chain and (B1) a number of the diol constitutional units having an odd number of carbon atoms in the polyester main chain with respect to a total of (A0) a number of total dicarboxylic acid constitutional units and (B0) a number of total diol constitutional units in the polyester resin is in the range of 0.5 to 1; and (2) an average particle diameter calculated from a volume-based particle diameter frequency distribution of the mica in the vibration damping material is 25 to 500 ?m. The damping material has a high versatility, is lightweight, shows an excellent vibration damping property and can be produced easily with a batch mixer.

Abstract: A resin composition contains dicarboxylic acid constitutional units and diol constitutional units and at least one of an electroconductive material and filler which is dispersed in the polyester resin. The polyester resin satisfies the relationship, 0.5?(A1 +B1)/(A0+B0)?1, wherein A0 is the number of total dicarboxylic acid constitutional units, B0 is the number of total diol constitutional units, A1 is the number of dicarboxylic acid constitutional units having an odd number of carbon atoms in a polyester main chain, and B1 is the number of diol constitutional units having an odd number of carbon atoms in the polyester main chain. The resin composition exhibits a high vibration damping ability.