Patent ID: 6429274
Filing Date: 2002-08-06
Classification: C07F,C08F,C08L,Y10S

Abstract:
A propylene homopolymer, said polymer being elastomeric and being soluble in at least one nonpolar organic solvent selected from the group consisting of toluene, xylene, heptane, and hexane, said polymer comprisinga) greater than 3 weight percent and up to 45 weight percent homotactic sequences each having only r or m diads, all of which homotactic sequences have a helical length in the range of 20 to 150 Ã¥, and b) in the range of 55 to 97 weight percent of the total composition being the sum of 1) homotactic sequences, each having only r or m diads, and being less than 20 Ã¥in helical length, and having fewer than 10 repeat units with mmmm pentads being present in the range of 0 to 35 weight percent of the total composition, and 2) heterotactic sequences having unequal numbers of r and m diads, said polymer having a molecular weight (Mw) of at least 70,000, and said polymer having a monomodal molecular weight (Mw) distribution.