| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester resin composition having an excellent ultraviolet absorbing effect and transparency, by blending a polyester resin with an inorganic, ultraviolet absorber and a resin-based pigment dispersant each of a specified amount. SOLUTION: A composition is a resin composition which is formed by blending a polyester resin with 0.01-5.00 pts.wt., based on 100 pts.wt. of the polyester resin, of an inorganic, ultraviolet absorber and with a resin-based pigment dispersant having a molecular weight by a viscosity method of 500-10,000 and which is blended in such a ratio R of the pigment dispersant to the ultraviolet absorber (R = an addition amount of the pigment dispersant/an addition amount of the ultraviolet absorber) as to be in the range: 0.1<=R<=5. In this case, the pigment dispersant is a main chain copolymer or a graft copolymer in which a polyethylene, polypropylene, or ethylene/propylene copolymer is modified with a carboxylic acid containing at least one carboxy group or with a styrene. |
