| 摘要 |
<p>A random copolymer consisting essentially of more than 60 to 99 mole% of 1-butene and less than 40 to 1 mole% of propylene, and having (A) a boiling methyl acetate-soluble content of not more tahn 2% by weight based on the weight of the copolymer, (B) an intrinsic viscosity ¢?!, determined in decalin at 135.degree.C, of 0.5 to 6 dl/g, (C) a n-decane/acetone (1:1 by volume) mixturesoluble content in % by weight based on the weight of the copolymer of less than the value calculated by 4x¢?!-1.2, (D) a DSC melting point, determined by a differential scanning calorimeter, of 50 to 130.degree.C, (E) a yield strength, measured by JIS K-7113, of 50 to 300 kg/cm2, (F) an elongation at break, measured by JIS K-7113, of 200 to 1000%, and (G) a tensile strength at break, measured by JIS K-7113, of 150 to 800 kg/cm2.</p> |
