MODIFIED a-OLEFIN POLYMER AND PROCESS FOR PRODUCTION OF CROSS-LINKED PRODUCT THEREOF

摘要

A modified a-olefin polymer which is produced by reacting the following components (i) to (iii) with one another: (i) an a-olefin polymer produced by the homo-polymerization of an a-olefin polymer having 3 or more carbon atoms or the co-polymerization of two or more a-olefin polymers each having 3 or more carbon atoms in the presence of a specific metallocen catalyst and having the following properties (1) to (3): (1) a mesopendad fraction of 40 to 75 mol% or an index of tacticity (M4) of 75 mol% or lower; (2) a molecular weight distribution in terms of PSt as measured by GPC method of 3.0 or lower; and (3) a limiting viscosity [?] (in tetralin, at 135°C) of 0.01 to 5.0 dl/g; (ii) a radical initiator; and (iii) a monomer or silane coupling agent having a silane group and an ethylenically unsaturated group; and a process for producing a cross-linked product of the modified a-olefin polymer. The modified a-olefin polymer has proper molecular weight distribution and compositional distribution, shows a good coating property at low temperatures (which is a requirement in a reactive hot melt) because it has a low melting temperature, has higher reactivity, compatibility and adhesion property compared to a conventional unmodified a-olefin polymer, produces little decomposition gas because it is a polyolefin material, and has a good adhesion to a polyolefin.