Abstract: The objective of the present invention is to provide a molding material for welding, which is capable of inhibiting occurrences of a string-shaped burr, a stringing between a heated mold such as a heated plate, and the constituting material of a housing, and the like, and of improving a failure of the appearance when a welding method such as vibration welding and hot plate welding is applied for joining resin parts. The present molding material comprises a rubber-reinforced resin obtained by polymerizing a vinyl-based monomer containing an aromatic vinyl compound and a cyanidated vinyl compound in the presence of an acryl-based rubbery polymer whose toluene gel content is less than 70%, or a mixture consisting of the rubber-reinforced resin and a (co)polymer of a vinyl-based monomer, and has the acryl-based rubbery polymer in an amount from 5 to 40% by mass with respect to the total amount of the molding material.

Abstract: Rubber-reinforced thermoplastic resins containing a copolymer resin (A1) obtained by polymerizing a vinyl monomer (b1) in the presence of an acrylic rubber-like polymer (a), or a mixture of copolymer resin (A1) and a (co)polymer (A2) of a vinyl monomer (b2). Acrylic rubber-like polymer (a) contains 50 to 98% by weight of acrylic rubber-like polymer particles (a1) which have a particle size of less than 350 nm and 2 to 50% by weight of acrylic rubber-like polymer particles (a2) which have a particle size of not less than 350 nm. The amount of the acrylic rubber-like polymer (a) is 5 to 80% by weight based on the rubber-reinforced thermoplastic resin.

Abstract: The present invention relates to a rubber-reinforced thermoplastic resin comprising a copolymer resin (A1) obtained by polymerizing a vinyl monomer (b1) in the presence of an acrylic rubber-like polymer (a), or a mixture of said copolymer resin (A1) and a (co)polymer (A2) of a vinyl monomer (b2),