| 摘要 |
PURPOSE:To obtain both heat- and solvent-resistant copolymer of narrow molecular weight distribution with each specific MFR, crystallinity, melting point and solubility to n-keptane and p-xylene, by copolymerization between 3- methyl-1-butene and another alpha-olefin. CONSTITUTION:The objective copolymer can be obtained by copolymerization, using as catalyst, TiCl4 and organoaluminum compound, between (A) 3- methyl-1-butene and (B) another alpha-olefin. This copolymer has the following characteristics; 1) molar ratio (A)/(B)...85/15-99.5/0.5 2) melt flow rate (MFR) determined at 340 deg.C under a load 2.16kg in compliance with ASTM D 1238...0.001-1,000g/10min 3) ratio HMFR/MFR measured under a load 10.0kg...<=300 4) crystallinity determined by X-ray...10-70% 5) melting point (Tm) by DSC...250-305 deg.C 6) boiling n-keptane soluble (DELTAy1...a value given by the equation I (X is mol% of the component (B), a1 is 0.6; b1 is 1.0) 7) boiling p-xylene soluble (DELTAy2)...a value given by the equation II (a2 is 3.0; b2 is 10). |
