Patent ID: 7645837

Claim:
A chlorinated propylene homopolymer having a chlorine content of 0.1 to 70% by mass, a weight average molecular weight (Mw) thereof as measured by gel permeation chromatography (GPC) of 5,000 to 100,000, and which is obtained by subjecting a propylene homopolymer to a chlorination treatment, wherein said propylene homopolymer prior to chlorination satisfies the following requirements (1) to (3): (1) the stereo-regularity index [mm] thereof determined from a peak derived from the methyl groups in the 13 C-NMR spectrum is 20 to 90 mol %, (2) the intrinsic viscosity [η] thereof as measured at 135° C. in a tetralin solvent is 0.01 to 0.5 dL/g, and (3) the melting point (Tm-D) thereof as measured by differential scanning calorimeter (DSC) is 0 to 120° C.