Abstract: Problem: To provide a molded article for laser welding which has excellent visible light transmittance and laser transmittance and in which variation in laser transmittance is suppressed, and an agent for suppressing variation in laser transmittance of a molded article for laser welding. Solution: A molded article for laser welding comprising a polybutylene terephthalate resin composition containing 100 parts by mass of (A) a polybutylene terephthalate resin, (B) a polycarbonate resin in which the melt viscosity at 300° C. and a shear rate of 1000 sec?1 is 0.20 kPa·s or greater, and 1 part by mass or greater and 10 parts by mass or less of (C) an epoxy-based compound, the molded article having a thickness at a welded part of 1.3 mm or greater, and an agent for suppressing variation in laser transmittance of a molded article for laser welding, the agent containing an epoxy-based compound.

Abstract: A method is disclosed for improving alkaline solution resistance of a thermoplastic resin by blending an aromatic polyvalent carboxylic acid ester into the thermoplastic resin. Preferably, 1 to 15 parts by mass of the aromatic polyvalent carboxylic acid ester are blended with respect to 100 parts by mass of the thermoplastic resin. Additionally, an aromatic polyvalent carboxylic acid ester can be used for improving alkaline solution resistance of a thermoplastic resin. An alkaline solution resistance improving agent is also disclosed for a thermoplastic resin, the alkaline solution resistance improving agent containing an aromatic polyvalent carboxylic acid ester.

Abstract: A polybutylene terephthalate resin composition containing a polybutylene terephthalate resin, a silicone-based compound having a kinematic viscosity at 25° C. of 1,000 to 10,000 cSt in an amount of 0.5 to 1.8% by mass of the total mass of the polybutylene terephthalate resin composition, and an olefin-based elastomer in an amount of 5 to 20% by mass of the total mass of the polybutylene terephthalate resin composition.

Abstract: To provide a technique of improving adhesion of a resin molded article including a polyalkylene terephthalate resin to a silicon adhesive. A polyalkylene terephthalate resin is used in which an aromatic dicarboxylic acid excluding terephthalic acid, and/or an ester compound thereof is subjected to copolymerization as a modified component, and the content of the modified component relative to the total dicarboxylic acid component is at least 13 mol % and no more than 35 mol %. It is preferable if the modified polyalkylene terephthalate resin is a modified polybutylene terephthalate resin, and the aromatic dicarboxylic acid and/or an ester compound thereof is isophthalic acid and/or an ester compound thereof.

Abstract: A molded article that is used on a laser beam absorbing in laser welding side and that is possible to be marked by being irradiated with a laser beam, the molded article being composed of a resin composition containing 0.1 to 0.4 parts by mass of a carbon black per 100 parts by mass of a thermoplastic aromatic resin, the carbon black having a primary particle diameter of 20 to 40 nm and a DBP oil absorption of 100 cm3/100 g or more.

Abstract: Disclosed are: a polyalkylene terephthalate resin composition comprising (A) a polyalkylene terephthalate resin and (B) an acrylic-based core-shell polymer which has an average particle size of 2 ?m or greater and in which an amount of the core layer component is more than 80% by mass but less than 100% by mass relative to a total mass of the core layer component and a shell layer component; and a molded article which is obtained by molding the polyalkylene terephthalate resin composition.

Abstract: A polybutylene terephthalate resin composition in which it is possible to effectively suppress discoloration without lowering the heat shock resistance. The polybutylene terephthalate resin composition is part of a molded article having a lightness L* value of 80 or higher as measured using a color difference meter, and includes a polybutylene terephthalate resin having a terminal carboxyl group content of 30 meq/kg or less, a carbodiimide compound, and a phosphite compound; and the phosphite compound content is 0.05-0.15 parts by mass per 100 parts by mass of polybutylene terephthalate resin.

Abstract: A polybutylene terephthalate resin composition containing a polybutylene terephthalate resin, a silicone-based compound having a kinematic viscosity at 25° C. of 1,000 to 10,000 cSt in an amount of 0.5 to 1.8% by mass of the total mass of the polybutylene terephthalate resin composition, and an olefin-based elastomer in an amount of 5 to 20% by mass of the total mass of the polybutylene terephthalate resin composition.

Abstract: A polybutylene terephthalate resin composition containing a polybutylene terephthalate resin, 10 to 20% by mass of glass fiber relative to a total mass of the composition, an ethylene/ethyl acrylate copolymer, and an epoxy compound having an epoxy equivalent weight of 600 to 1,500 g/equivalent, and having a comparative tracking index (CTI) of 600 V or higher, measured in accordance with the third edition of IEC 60112.

Abstract: A polybutylene terephthalate resin composition in which it is possible to effectively suppress discoloration without lowering the heat shock resistance. The polybutylene terephthalate resin composition is part of a molded article having a lightness L* value of 80 or higher as measured using a color difference meter, and includes a polybutylene terephthalate resin having a terminal carboxyl group content of 30 meq/kg or less, a carbodiimide compound, and a phosphite compound; and the phosphite compound content is 0.05-0.15 parts by mass per 100 parts by mass of polybutylene terephthalate resin.

Abstract: A polybutylene terephthalate resin composition containing a polybutylene terephthalate resin, 10 to 20% by mass of glass fiber relative to a total mass of the composition, an ethylene/ethyl acrylate copolymer, and an epoxy compound having an epoxy equivalent weight of 600 to 1,500 g/equivalent, and having a comparative tracking index (CTI) of 600 V or higher, measured in accordance with the third edition of IEC 60112.

Abstract: A resin composition including an aromatic polyester resin and having high levels of hydrolysis resistance and moldability is provided. The resin composition includes an aromatic polyester resin having a terminal carboxyl group content of not more than 30 eq/ton (component A), a cyclic carbodiimide compound having at least two carbodiimide rings, each having only one carbodiimide group (component B), and a polyvalent hydroxyl group-containing compound having a hydroxyl value of not less than 200 (component C).

Abstract: The present invention provides a polybutylene terephthalate resin composition which does not induce swelling and bleeding of elastomer component caused by an organic solvent such as fuel, having performance of a high durability and the like in a cold cycle environment, and having an excellent resistance to hydrolysis. Specifically, relative to 100 parts by weight of a polybutylene terephthalate resin (A) having 30 meq/kg or less of the amount of terminal carboxyl groups, there are added a carbodiimide compound (B) in an amount of 0.3 to 1.5 equivalents of the carbodiimide functional group when the amount of carboxyl terminal group in the polybutylene terephthalate resin (A) is set as 1, and 20 to 100 parts by weight of a fibrous filler (C).

Abstract: Disclosed are: a polyalkylene terephthalate resin composition comprising (A) a polyalkylene terephthalate resin and (B) an acrylic-based core-shell polymer which has an average particle size of 2 ?m or greater and in which an amount of the core layer component is more than 80% by mass but less than 100% by mass relative to a total mass of the core layer component and a shell layer component; and a molded article which is obtained by molding the polyalkylene terephthalate resin composition.

Abstract: Provided is a means for obtaining a polybutylene terephthalate resin composition that exhibits excellent hydrolysis resistance and high fluidity in a molten state. A carbodiimide compound (B) and a polyhydric hydroxyl group-containing compound (C) are added to a polybutylene terephthalate resin (A) having a terminal carboxyl group content of 30 meq/kg or lower. The polyhydric hydroxyl group-containing compound (C) that is used has a hydroxyl group value of 200 or higher. It is preferable for the polybutylene terephthalate resin (A) to have an intrinsic viscosity of 0.6 dL/g or higher.

Abstract: To provide a polybutylene terephthalate resin composition offering excellent flowability, wherein the resin composition raises the weld strength and heat shock resistance of a welded body obtained by welding together molded products obtained by molding the polybutylene terephthalate resin composition. [Solution] A polybutylene terephthalate resin composition comprising a polybutylene terephthalate resin (A) having a weight-average molecular weight of 60,000-80,000 inclusive and an inorganic filler (B). Preferably, also included is 5-20 mass parts of an elastomer (C) relative to 100 mass parts of the polybutylene terephthalate resin (A).

Abstract: To provide a technique in which a phosphorus compound does not inhibit curing of an addition reaction type silicone-based composition even though the addition reaction type silicone-based composition is in contact with a resin molded product containing the phosphorus compound. An integrated molded product including a thermoplastic resin molded product containing a phosphorus compound, an addition reaction type silicone-based composition, and a member, in which: the thermoplastic resin molded product is in contact with the addition reaction type silicone-based composition; and a pentavalent phosphorus compound is used as the phosphorus compound. The thermoplastic resin molded product preferably contains a polybutylene terephthalate resin in light of heat resistance.

Abstract: Provided is a means for obtaining a polybutylene terephthalate resin composition that exhibits excellent hydrolysis resistance and high fluidity in a molten state. A carbodiimide compound (B) and a polyhydric hydroxyl group-containing compound (C) are added to a polybutylene terephthalate resin (A) having a terminal carboxyl group content of 30 meq/kg or lower. The polyhydric hydroxyl group-containing compound (C) that is used has a hydroxyl group value of 200 or higher. It is preferable for the polybutylene terephthalate resin (A) to have an intrinsic viscosity of 0.6 dL/g or higher.

Abstract: A resin composition including an aromatic polyester resin and having high levels of hydrolysis resistance and moldability is provided. The resin composition includes an aromatic polyester resin having a terminal carboxyl group content of not more than 30 eq/ton (component A), a cyclic carbodiimide compound having at least two carbodiimide rings, each having only one carbodiimide group (component B), and a polyvalent hydroxyl group-containing compound having a hydroxyl value of not less than 200 (component C).

Abstract: The present invention provides a polybutylene terephthalate resin composition, having performance of high durability and the like in a cold cycle environment, and having high strength. Specifically, relative to 100 parts by weight of a polybutylene terephthalate resin (A) having 30 meq/kg or less of the amount of terminal carboxyl groups, there are added a carbodiimide compound (B) in an amount of 0.3 to 1.5 equivalents of the carbodiimide functional group when the amount of carboxyl terminal group in the polybutylene terephthalate resin (A) is set as 1, 20 to 100 parts by weight of a fibrous filler (C), and 5 to 15 parts by weight of an elastomer (D).