BUTENE-1 COPOLYMER

摘要

The invention is concerned with a novel butene-1 copolymer containing hexene-1 units and butene-1 units within a molar ratio from 1 : 99 to 20 : 80 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 of from 2 to 40.degree.C, the hexene-1 block property of the copolymer measured by NMR spectroscopy is not more than 0.005, and the content of the boiling diethyl ether soluble ingredient in the copolymer is within a range from 3 to 30% by weight. Such a copolymer has excellent workability and mechanical properties.