Abstract: The present invention relates to a class of impact copolymer polypropylene (ICP) compositions exhibiting the advantageous combination of excellent tiger (flow) marking performance in large/long molded parts, very low gels count and exceptional mold flowability (high MFR) despite the high viscosity ratio (e.g., >4) between rubber and propylene based matrix phases. Furthermore, it has been surprisingly found that the inventive compositions are associated with a low gels count even when using a quite coarse mesh wire screen, e.g., 60 mesh wire screen, independent of screw type e.g., twin or single screw. Finally, the inventive compositions exhibit significantly reduced the levels of volatiles, and excellent stiffness-impact balance used as standalone materials or in filled compounds. The significantly reduced number of large gels leads to excellent surface appearance and paintability of the molded parts. The composition of the present invention is made with a bulk/gas reactor process (i.e.

Abstract: The present invention relates to a class of impact copolymer polypropylene (ICP) compositions exhibiting the advantageous combination of excellent tiger (flow) marking performance in large/long molded parts, very low gels count and exceptional mold flowability (high MFR) despite the high viscosity ratio (e.g., >4) between rubber and propylene based matrix phases. The inventive compositions exhibit significantly reduced the levels of volatiles, and excellent stiffness-impact balance used as standalone materials or in filled compounds. The significantly reduced number of large gels leads to excellent surface appearance and paintability of the molded parts. The composition of the present invention is made with a bulk/gas reactor process (i.e., non-slurry/non-solvent process) that has the advantage of process simplicity, process efficiency and simplicity of compositional structure relative to the complexity in structure and process of making of compositions in the prior art.

Abstract: The present invention relates to an impact-resistant olefin polymer composition including a polypropylene matrix having a weight average molecular weight and an ethylene-containing polymer including an ethylene-propylene copolymer having a molecular weight higher than the weight average molecular weight of the polypropylene matrix, the composition containing about 20 to 35 percent xylene solubles, and the xylene solubles fraction of the composition containing less than about 39 weight percent ethylene units, based on the combined weight of olefin monomers in the copolymer. The present invention further relates to impact copolymer compositions with a melt flow rate greater than about 8 that meet or exceed all pallet testing requirements.

Abstract: The present invention relates to an impact-resistant olefin polymer composition including a polypropylene matrix having a weight average molecular weight and an ethylene-containing polymer including an ethylene-propylene copolymer having a molecular weight higher than the weight average molecular weight of the polypropylene matrix, the composition containing about 20 to 35 percent xylene solubles, and the xylene solubles fraction of the composition containing less than about 39 weight percent ethylene units, based on the combined weight of olefin monomers in the copolymer. The present invention further relates to impact copolymer compositions with a melt flow rate greater than about 8 that meet or exceed all pallet testing requirements.