| 摘要 |
PURPOSE:To enable reduction in aging of color tone and hardness of colored coating applied on the surface exposed outdoor over a long period by forming a resin composition composed of thermoplastic polyurethane of a non-yollowing type combined or uncombined with polymer of a vinyl chloride family and of pigment. CONSTITUTION:This resin composition must be polymer of a vinyl chloride family, thermoplastic polyurethane of a non-yellowing type, in other words, it must be composed of thermoplastic polyurethane wherein polysocyanate of an aromatic family as polysocyanate of law material is not used in selecting material out of thermoplastic polyurethane of any type, and of pigment. However, it is allowed whether polymer of a vinyl chloride family is chemically combined with thermoplastic polyurethane of a non-yellowing type or not within resin composition. As resin composition, either of already known polymer of a vinyl chloride family such as, for example, Aron NP-6000 or DOEMINASK700 and the like available on the commercial market and resin composition composed of thermoplastic polyurethane of a non-yellowing type can be used, and color tone and hardness of the surface of a formed molding and the like changing with time can be restrained. |
