C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
154/140, 400/404
C08L 23/14 (2006.01) B32B 27/08 (2006.01) B32B 27/32 (2006.01) C08J 5/18 (2006.01) C08L 23/08 (2006.01) C08L 23/16 (2006.01) C08L 23/18 (2006.01)
Patent
CA 2033053
Compositions provided in accordance with the present invention contain 85-20% by weight of a propylene/1-butene random copolymer (A) having a melt index (ASTM D 1238-65T, 230°C) of 0.1-100 g/10 min, propylene content of 60-85 mol%, and a heat of fusion, as measured by thermal analysis with a differential scanning calorimeter, of 20-80 joule/g, 15-80% by weight of an ethylene/.alpha.-olefin copolymer (B) having a melt index (ASTM D 1238-65T, 190°C) of 0.1-100 g/10 min, ethylene content of 75-95 mol%, crystallinity index of 0-30%, and .alpha.-olefin having 3-10 carbon atoms, and 0-10% by weight of a tackifier (C), with the proviso that (A) + (B) + (C) is 100% by weight. The composition according to the invention are capable of providing strippable protective films which are excellent in flexibility, scratch resistance and heat resistance and, at the same time, which have appropriate initial adhesive power to articles to which they are applied and strippability therefrom and, moreover, which are less in change on standing even when they are stored for an extended period of time and are free from bleeding on the article surface even when they are stripped therefrom.
Sugi Masahiro
Tanaka Mutsuhiro
Mitsui Chemicals Inc.
Smart & Biggar
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