Moisture curable propylene-α-olefin copolymers

A graft copolymer composition comprising a hydrolizable silane graft propylene-α-olefin copolymer, the composition comprising:

• a hydrolizable silane graft propylene-α-olefin copolymer comprising a propylene-α-olefin copolymer component and a hydrolizable silane component, and
• from 0.1 to 5 wt %, based on total weight of the hydrolizable silane graft propylene-α-olefin copolymer, of at least one silanol condensation catalyst:
• wherein the propylene-α-olefin copolymer component comprises propylene-derived units and from 5 to 20 wt %, by weight of the propylene-α-olefin copolymer, of ethylene-derived units or C4 to C10 α-olefin-derived units, and having:
• (i) a density of from 0.850 to 0.920 g/cm3;
• (ii) a MWD of from 1.5 to 20;
• (iii) an Hf of less than or equal to 75 J/g;
• (iv) a Tm of from 25 to 105° C.;
• (v) a triad tacticity by 13C NMR of 75% or greater;
• (vi) a melt flow rate (2.16 kg, 230° C.) of from 0.2 to 100 dg/min;
• (vii) a weight average molecular weight of 50,000 to 400,000;
• and
• (viii) a number average molecular weight of 25,000 to 200,000;
• and
• wherein the cured graft copolymer composition comprising the hydrolizable silane graft copolymer has an Elongation at Break as determined by ISO-37 (500 mm/min, 23° C.) greater than 400%;
• wherein the hydrolizable silane component is derived from a vinyl silane having the following formula:
• YSiRR″2, wherein Y is selected from vinyl terminated radicals, each R″ is independently selected from hydrolizable organic radicals;
• and R can be an R″ radical, or selected from C1 to C10 alkyl radicals (both R and R″ are bound to the silicon atom);
• and
• wherein the graft copolymer has a haze value of from less than 15%.