| 摘要 |
<p>(1) A flexible polypropylene resin composition characterized by comprising 100 parts by weight of a flexible polypropylene resin exhibiting a peak melting temperature of 150 °C or above as determined by the use of a differential scanning colorimeter and a modulus in tension of 200 to 700 MPa and 0.05 to 5 parts by weight of a hindered amine light stabilizer. The flexible polypropylene resin is preferably one comprising (A) 100 to 20 % by weight of a propylene homopolymer which exhibits a pentad fraction wherein the rrrr/(1-mmmm) x 100 value is 20 to 60 % in the 13C-NMR spectrometry and a melting enthalpy of 10 to 100 J/g as determined by the use of a differential scanning colorimeter and/or a propylene copolymer containing at most 4 % by weight of other olefin units and (B) 0 to 80 % by weight of a propylene copolymer containing 10 to 80 % by weight of non-propylene olefin units. (2) A flexible polypropylene resin composition as described in the item (1), which further contains 0.05 to 5 parts by weight of a benzotriazole ultraviolet absorber per 100 parts by weight of the flexible polypropylene resin. (3) Films or sheets made from the resin composition described in the item (1) or (2). The resin compositions are useful for the production of molded articles, films and sheets, particularly surface-protective films or sheets on which adhesive layers, ink layers or substrates are to be formed, and the molded articles, films or sheets made from the compositions are improved in weathering resistance.</p> |
