THERMOPLASTIC RESIN COMPOSITION FOR REFLECTIVE MATERIAL, REFLECTIVE PLATE, AND LIGHT-EMITTING DIODE ELEMENT

摘要

The purpose of the present invention is to provide a thermoplastic resin composition for a reflective material which has excellent mechanical strength, excellent heat resistance, excellent high reflectance, and excellent moldability, and which makes it possible to obtain a reflective plate with little decline in reflectance caused by heating. A first embodiment of this thermoplastic resin composition for a reflective material includes: a polyester resin (A) that has a melting point or glass transition temperature of 250° C. or higher and includes an alicyclic hydrocarbon structure; a thermoplastic resin (B) that has a polyolefin backbone and a functional group; a white pigment (C); and an inorganic filler (D); the thermoplastic resin (B) either including 0.1 to 1.8 wt % of a functional group unit (B1) that further includes a heteroatom, or further including an aromatic hydrocarbon structure (B2), and the limiting viscosity [η] being 0.04 to 1.0 dl/g.

主权项

1. A thermoplastic resin composition for a reflective material comprising:
30 to 85% by mass of a polyester resin (A) having a melting point or glass transition temperature of 250° C. or more; 0.1 to 15% by mass of a thermoplastic resin (B) having a polyolefin skeleton and a functional group; 5 to 50% by mass of a white pigment (C); and 1 to 50% by mass of an inorganic filler (D), wherein the total of (A), (B), (C) and (D) is 100% by mass, the thermoplastic resin (B) being
a thermoplastic resin (B1) containing a polyolefin skeleton and 0.1 to 1.8% by weight of a functional group containing a hetero atom, ora thermoplastic resin (B2) containing a polyolefin skeleton and an aromatic hydrocarbon structure, and having an intrinsic viscosity as measured at 135° C. in decalin of 0.04 to 1.0 dl/g.