发明名称 |
Polypropylene Composition and Uses Thereof |
摘要 |
<p>Disclosed is a polypropylene composition comprising (A) polypropylene and (B) a specific propylene-l-butene random copolymer in a specific amount ratio. The propylene-l-butene random copolymer (B) is characterized in that: (1) the copolymer contains 50 to 95 % by mol of constituent units from propylene and 50 to 5 % by mol of constituent units from 1-butene, (2) the intrinsic viscosity, as measured in decahydronaphthalene at 135 DEG C, is in the range of 0.1 to 12 dl/g, (3) the molecular weight distribution (Mw/Mn), as determined measured by GPC, is not more than 3, and (4) the parameter B value indicating randomness of the copolymerized monomer sequence distribution is in the range of 1.0 to 1.5. Also disclosed is a polypropylene composite film comprising (I) a crystalline polypropylene layer and (II) a layer formed from the polypropylene composition, which is laminated on at least one surface of the crystalline polypropylene layer (I). The polypropylene composition is excellent in heat resistance and low-temperature heat-sealing properties as well as in flexibility and impact resistance. The polypropylene composite film is excellent in not only heat-sealing properties, particularly low-temperature heat-sealing properties, but also transparency, scratch resistance and blocking resistance.</p> |
申请公布号 |
CA2164461(A1) |
申请公布日期 |
1996.06.07 |
申请号 |
CA19952164461 |
申请日期 |
1995.12.05 |
申请人 |
MITSUI PETROCHEMICAL INDUSTRIES, LTD. |
发明人 |
TANIZAKI, TATSUYA;HASHIMOTO, MIKIO;SUGI, MASAHIRO;TSUTSUI, TOSHIYUKI;TANAKA, YASUO;KAGAMI, MAMORU |
分类号 |
C08F210/06;C08L23/10;C08L23/12;C08L23/14;(IPC1-7):C08L23/14;B32B27/32 |
主分类号 |
C08F210/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|