BUTENE-1 COPOLYMER

摘要

The invention is concerned with a butene-1 copolymer containing propylene units and butene-1 units within a molar ratio from 1 : 99 to 35 : 65 in which the intrinsic viscosity for the copolymer is within a range from 0.9 to 7.2 dl/g, the ratio of weight average molecular weight/number average molecular weight is within a range from 4 to 15, the temperature difference between the highest value and the lowest value of the melting point of the copolymer measured by differential thermal scanning analysis is within a range from 2 to 40.degree.C, the propylene block property of the copolymer measured by NMR spectroscopy is not more than 0.01, and the content of the boiling diethyl ether soluble ingredient in the copolymer is within a range from 1 to 45% by weight. The butene-1 copolymer of the invention has excellent workability and mechanical properties.