A propylene polymeric composition with elastic character that is soluble in at least one nonpolar organic solvent selected from the group consisting of toluene, xylene, heptane, and hexane, comprises greater than 3 weight percent and up to 45 weight percent homotactic sequences each having only r or...http://www.google.es/patents/US6429274?utm_source=gb-gplus-sharePatente US6429274 - Elastic polypropylenes and catalysts for their manufacture
Elastic polypropylenes and catalysts for their manufacture
