Abstract: Provided are: a thermally curable composition which contains benzoxazine-based compounds obtained by condensing aromatic diamines, a phenol compound, and an aldehyde compound, the aromatic diamines being a mixture comprising 4,4?-oxydianiline and 3,4?-oxydianiline, the mass ratio of the 4,4?-oxydianiline to the 3,4?-oxydianiline being 50:50 to 80:20; a varnish of the thermally curable composition; and a thermally cured object.

Abstract: Provided are: a thermally curable composition which contains benzoxazine-based compounds obtained by condensing aromatic diamines, a phenol compound, and an aldehyde compound, the aromatic diamines being a mixture comprising 4,4?-oxydianiline and 3,4?-oxydianiline, the mass ratio of the 4,4?-oxydianiline to the 3,4?-oxydianiline being 50:50 to 80:20; a varnish of the thermally curable composition; and a thermally cured object.

Abstract: A high-quality polyacetal produced by a process including supplying a raw material comprising trioxane, a comonomer capable of copolymerizing with trioxane and a non-volatile protonic acid to a reactor of a continuous stirring/mixing machine type; carrying out a polymerization reaction of the raw material to produce a reaction mixture; vaporizing an unreacted monomer to separate the unreacted monomer from the reaction mixture and supplying the unreacted monomer to the raw material supplying; collecting a polyacetal copolymer from the reaction mixture into a collection unit which is arranged downstream from a discharge port and is adjusted to have a gauge pressure of 0.2 kPa or more; and adding a basic compound to the collected polyacetal and then subjecting the resultant mixture to a melt-kneading treatment to deactivate the non-volatile protonic acid.

Abstract: A high-quality polyacetal produced by a process including supplying a raw material comprising trioxane, a comonomer capable of copolymerizing with trioxane and a non-volatile protonic acid to a reactor of a continuous stirring/mixing machine type; carrying out a polymerization reaction of the raw material to produce a reaction mixture; vaporizing an unreacted monomer to separate the unreacted monomer from the reaction mixture and supplying the unreacted monomer to the raw material supplying; collecting a polyacetal copolymer from the reaction mixture into a collection unit which is arranged downstream from a discharge port and is adjusted to have a gauge pressure of 0.2 kPa or more; and adding a basic compound to the collected polyacetal and then subjecting the resultant mixture to a melt-kneading treatment to deactivate the non-volatile protonic acid.

Abstract: A solid phosphoric acid catalyst which, when gas-phase synthesizing trioxane from formaldehyde, results in production of trioxane at a high yield and at a high selection rate by markedly suppressing side reactions, reduces the adhesion of organic matter to the catalyst surface, and achieves a stable and long-term catalyst reaction. This solid phosphoric acid catalyst contains silicon phosphate oxide (SPO) obtained by sintering at a temperature of at least 200° C. a carrier material to which a phosphoric acid component has been added, and the total quantity of acid does not exceed 5 mmol per 1 g of solid phosphoric acid catalyst when calculated as acid quantity determined by NH3-TPD measurement.

Abstract: A heat-curable composition comprises 30-70 mass % of a compound represented by formula (1) and 70-30 mass % of a compound represented by formula (2). In formulae (1) and (2), R1, R2, R3 and R4 are the same as or different from one another, and are independently selected from the group consisting of —H, —CH3, —C(CH3)3 and a group represented by formula (i) for each of compound molecules. In formula (i), Y is selected from the group consisting of —O—, —CH2— and —C(CH3)2—. The heat-curable composition containing the benzoxazine compound has excellent solubility in solvents, heat resistance and flame retardancy, and therefore can be used for providing a cured product of the composition or a varnish.

Abstract: A solid phosphoric acid catalyst which, when gas-phase synthesizing trioxane from formaldehyde, results in production of trioxane at a high yield and at a high selection rate by markedly suppressing side reactions, reduces the adhesion of organic matter to the catalyst surface, and achieves a stable and long-term catalyst reaction. This solid phosphoric acid catalyst contains silicon phosphate oxide (SPO) obtained by sintering at a temperature of at least 200° C. a carrier material to which a phosphoric acid component has been added, and the total quantity of acid does not exceed 5 mmol per 1 g of solid phosphoric acid catalyst when calculated as acid quantity determined by NH3-TPD measurement.

Abstract: A thermosetting composition includes 30 to 70% by mass of a compound represented by Formula (1) below and 70 to 30% by mass of a compound represented by Formula (2) below: In Formulae (1) and (2), R1, R2, R3 and R4 may be the same or different from one another and are each selected independently with respect to each molecule of the compounds from the group consisting of —H, —CH3, —C(CH3)3 and a group represented by Formula (i) below: In Formula (i), Y is selected from the group consisting of —O—, —CH2— and —C(CH3)2—. This thermosetting composition including such benzoxazine compounds exhibits excellent solvent solubility, heat resistance and flame retardance. Thus, the composition may be provided as a thermosetting material and a varnish thereof.

Abstract: A polyimide and a polyimide film obtained by reacting: an aromatic diamine, and 3,3?,4,4?-biphenyltetracarboxylic acid dianhydride, pyromellitic acid dianhydride, p-phenylenediamine and 4,4?-diaminodiphenyl ether, the amount of the component (I) being 0.1 to 10.0 mol % and the amount of the components (II) being 99.9 to 90.0 mol % based on the total amount of the component (I) and the components (II) (in Formula (1), R1, R2, R3 and R4 are each independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitrogen-containing group, a linear or branched alkyl group with 1 to 12 carbon atoms, a linear or branched alkenyl group with 2 to 12 carbon atoms, a linear or branched alkoxy group with 1 to 12 carbon atoms, a hydroxyl group, a nitrile group, a nitro group, a carboxyl group, a carbamoyl group and an aromatic group with 6 to 12 carbon atoms).

Abstract: The present invention provides a method of manufacturing a stabilized polyacetal resin, comprising the step of applying a heat treatment to a polyacetal resin having an unstable terminal group in the presence of an unstable terminal group decomposer selected from the following Group I, Group II and Group III, thereby decreasing the unstable terminal group: unstable terminal group decomposer of Group I: (I) a quaternary ammonium salt of an acidic cyclic amide compound, unstable terminal group decomposer of Group II: (II) a quaternary ammonium salt of a polycarboxylic acid intramolecularly having four or more carboxyl groups and/or a quaternary ammonium salt of an aminocarboxylic acid intramolecularly having one or more carboxyl group(s), unstable terminal group decomposer of Group III: (III) a quaternary ammonium salt, wherein a compound providing a counter-anion of a quaternary ammonium salt is at least one selected from the group consisting of the following (i) to (v): (i) a carbonic acid monoester

Abstract: There is provided a slant face at an upper portion of a seatbelt anchor. The slant face is formed in such a manner that its lower portion is located inward. There is provided an uneven portion that is formed near an upper edge portion of the seatbelt anchor so as to overhang. Accordingly, the curtain airbag can be prevented from catching on the seatbelt anchor even if the curtain airbag inflates downward contacting the inner face of the center pillar during its inflation.

Abstract: A middle pillar trim and a rear pillar trim positioned to the front and rear of a side window glass are each harder than a roof trim. A curtain air bag fixed to a rear pillar is deployed in a vehicle cabin while a predetermined end edge of the front of the rear pillar trim in the widthwise direction of a vehicle is deformed toward the front. The separation distance of the curtain air bag in a stored state from the side window glass in the widthwise direction of the vehicle is L1 (L2) in the portion of the curtain air bag along the rear edge of the side window glass, and L4 in the portion of the curtain air bag at the upper edge of the side window glass near the middle pillar trim, and the separation distance L1(L2) is smaller than the separation distance L4.

Abstract: A structure of a rear portion of a vehicle furnished with a curtain airbag apparatus includes a rear pillar, a soft roof trim, a rear pillar trim harder than the roof trim, and a cover constituting part of the rear pillar trim and covering a specific area of a front face portion of the rear pillar trim. The curtain airbag apparatus includes a curtain airbag and an inflator for inflating and deploying the curtain airbag into the vehicle interior along side window glass. The cover of the rear pillar trim can easily be displaced frontward along an airbag deployment joint. When inflated, the curtain airbag fixed to a vehicle body along an upper edge and a rear edge of the side window glass in a retracted position deploys into the vehicle interior upon separating and displacing the cover of the rear pillar trim frontward from the other part thereof.

Abstract: A blue-light-emitting element includes a polyimide containing a repeating unit represented by formula (1): (wherein X represents a divalent alicyclic hydrocarbon group having 6 to 24 carbon atoms). Since the polyimide has a high glass transition temperature and toughness and exhibits a stable luminous efficiency; the blue-light-emitting element is suitable for an organic EL display.

Abstract: A vehicle rear structure with a curtain air bag device is provided which is capable of, when a predetermined condition is satisfied, effectively restraining a front upper end of a rear pillar trim from breaking and scattering, and spreading a curtain member properly.

Abstract: The present invention provides an agent to decompose instable terminal group, which is effective in a small adding amount, which sufficiently decreases the quantity of residual instable terminal group, and which generates very little limitation on the treatment method, the apparatus, and the use amount of the agent. Specifically, it provides a method for manufacturing stabilized polyacetal resin having the step of applying heat treatment to a polyacetal resin having an instable terminal group in the presence of an agent to decompose the instable terminal group, which agent is composed of a heterocyclic quaternary ammonium salt, thus decreasing the quantity of the instable terminal group.

Abstract: The present invention provides a method of manufacturing a stabilized polyacetal resin, comprising the step of applying a heat treatment to a polyacetal resin having an unstable terminal group in the presence of an unstable terminal group decomposer selected from the following Group I, Group II and Group III, thereby decreasing the unstable terminal group: unstable terminal group decomposer of Group I: (I) a quaternary ammonium salt of an acidic cyclic amide compound, unstable terminal group decomposer of Group II: (II) a quaternary ammonium salt of a polycarboxylic acid intramolecularly having four or more carboxyl groups and/or a quaternary ammonium salt of an aminocarboxylic acid intramolecularly having one or more carboxyl group(s), unstable terminal group decomposer of Group III: (III) a quaternary ammonium salt, wherein a compound providing a counter-anion of a quaternary ammonium salt is at least one selected from the group consisting of the following (i) to (v): (i) a carbonic acid monoester

Abstract: There is provided a slant face at an upper portion of a seatbelt anchor. The slant face is formed in such a manner that its lower portion is located inward. There is provided an uneven portion that is formed near an upper edge portion of the seatbelt anchor so as to overhang. Accordingly, the curtain airbag can be prevented from catching on the seatbelt anchor even if the curtain airbag inflates downward contacting the inner face of the center pillar during its inflation.

Abstract: A vehicle rear structure with a curtain air bag device is provided which is capable of, when a predetermined condition is satisfied, effectively restraining a front upper end of a rear pillar trim from breaking and scattering, and spreading a curtain member properly.

Abstract: A structure of a rear portion of a vehicle furnished with a curtain airbag apparatus includes a rear pillar, a soft roof trim, a rear pillar trim harder than the roof trim, and a cover constituting part of the rear pillar trim and covering a specific area of a front face portion of the rear pillar trim. The curtain airbag apparatus includes a curtain airbag and an inflator for inflating and deploying the curtain airbag into the vehicle interior along side window glass. The cover of the rear pillar trim can easily be displaced frontward along an airbag deployment joint. When inflated, the curtain airbag fixed to a vehicle body along an upper edge and a rear edge of the side window glass in a retracted position deploys into the vehicle interior upon separating and displacing the cover of the rear pillar trim frontward from the other part thereof.