Shaped articles for biomedical use

Claim 1

Shaped articles for biomedical use prepared starting from copolymers of ethylene with propylene and/or alpha olefins CH₂ =CHR, wherein R is an alkyl containing from 2 to 10 carbon atoms, and optionally with lower proportions of units deriving from a diene or polyene, containing from 45 to 85% by mols of ethylene, from 15 to 55 % by mols of propylene and/or alpha olefins, and from 0 to 10% by mols of diene or polyene, characterized by the following properties: - crystallinity content, measured as melting enthalpy, lower than 20 J/g; - solubility in pentane at 25°C higher than 90%; - content of propylene units or units deriving from alpha-olefin in form of triads comprised between 4 and 50% of propylene or alpha olefin and percentage of said triads having isotactic structure of at least 70%; product r₁.r₂ of the reactivity ratio of ethylene, r₁, and of propylene or alpha olefin, r₂, comprised between 0.4 and 1; - intrinsic viscosity higher than 1.5 dl/g.