High filler loaded polymer composition

A thermoplastic blend composition comprising:

• a polymer composition in an amount of from greater than 2 wt % to less than or equal to 40 wt % of the blend composition;
• and
• a second polymer present in an amount of from greater than or equal to 60 wt % to less than 98 wt % based on the total weight of the blend composition;
• wherein the polymer composition comprises:
• A) less than 50 wt % of a first polymer based on the total weight of the polymer composition;
• B) greater than 50 wt % of one or more fillers based on the total weight of the polymer composition;
• and optionally
• C) a cross-linking pack;
• wherein said first polymer comprises
• a propylene-based copolymer comprising, based on the total weight of said propylene-based copolymer, (a) at least about 60 wt % of propylene-derived units, (b) about 5 wt % to about 35 wt % of units derived from at least one of ethylene or a C4-C10 alpha-olefin, and optionally (c) about 0 to 5 wt % of diene-derived units, wherein the polypropylene-based copolymer has a heat of fusion, as determined by DSC, of about 75 J/g or less, a melting point, as determined by DSC, of about 100° C. or less, and a crystallinity, as determined by DSC, of about 2% to about 65% from isotactic polypropylene sequences, and a melt flow rate from 0.5 to 1,000 g/10 min measured at 230° C. and 2.16 kg weight;
• and
• wherein said one or more fillers comprise:
• i) carbon black, in an amount of from greater than 50 wt % to less than or equal to 65 wt % based on the total weight of said polymer composition;
• or
• ii) ferrite magnet powder, in an amount of less than or equal to 90 wt % based on the total weight of said polymer composition;
• or
• iii) calcium carbonate, in an amount of from greater than 81 wt % to less than or equal to 85 wt % based on the total weight of said polymer composition;
• or
• iv) alumina trihydrate, magnesium hydroxide, talc, titanium dioxide, natural fibers, polymeric fibers, glass fibers, marble dust, cement dust, clay, feldspar, silica or glass, fumed silica, alumina, magnesium oxide, antimony oxide, zinc oxide, barium sulfate, calcium sulfate, aluminum silicate, calcium silicate, titanates, nanoclay, organo-modified clay or nanoclay, glass microspheres, mica, wollastonite, chalk, graphite, or any combination thereof, in an amount of from greater than 60 wt % to less than or equal to 80 wt % based on the total weight of said polymer composition;
• and
• wherein said cross-linking pack comprises a cross-linking agent in an amount of from 0.1 to 5 parts by weight and a coagent in an amount of from 0.05 to 10 parts by weight, based on 100 parts by weight of said first polymer, and wherein said cross-linking agent comprises organic peroxide and said coagent comprises at least one of di- and tri-allyl cyanurates and isocyanurates, liquid and metallic multifunctional acrylates and methacrylates, zinc-based dimethacrylates and diacrylates, and functionalized polybutadiene resins;
• and
• wherein said second polymer comprises a polypropylene having a melting point of greater than or equal to 110° C., as determined by DSC.