Abstract: The present invention relates to hydrogenated block copolymers of vinyl aromatic polymer blocks and conjugated diene polymer blocks having specific molecular weights, compositions, molecular structures and architectures, such that improved processability, mechanical and optical properties are attained. The hydrogenated block copolymer can be further added with different hydrogenated block copolymers to enhance the desired properties.

Abstract: The present invention relates to hydrogenated block copolymers of vinyl aromatic polymer blocks and conjugated diene polymer blocks having specific molecular weights, compositions, molecular structures and architectures, such that improved processability, mechanical and optical properties are attained. The hydrogenated block copolymer can be further added with different hydrogenated block copolymers to enhance the desired properties.

Abstract: Provided are various compositions, including but not limited to a bimodal polyethylene composition having a density of 0.940 g/cc or more, the composition comprising a high molecular weight polyethylene component and a low molecular weight polyethylene component, wherein the composition qualifies as a PE 100 material such that in accordance with ISO 1167 a pipe formed from the composition that is subjected to internal pipe resistance has an extrapolated stress of 10 MPa or more when the internal pipe resistance curve is extrapolated to 50 or 100 years in accordance with ISO 9080:2003(E), and wherein the melt strength is greater than 18 cN.

Abstract: Provided are various compositions, including but not limited to a bimodal polyethylene composition having a density of 0.940 g/cc or more, the composition comprising a high molecular weight polyethylene component and a low molecular weight polyethylene component, wherein the composition qualifies as a PE 100 material such that in accordance with ISO 1167 a pipe formed from the composition that is subjected to internal pipe resistance has an extrapolated stress of 10 MPa or more when the internal pipe resistance curve is extrapolated to 50 or 100 years in accordance with ISO 9080:2003(E), and wherein the melt strength is greater than 18 cN.

Abstract: A pipe composition comprising, in one embodiment, from 80 to 99 wt % of a high density polyethylene by weight of the composition and from 1 to 20 wt % of a filler by weight of the composition; the polyethylene having a density of from 0.940 to 0.980 g/cm3, and an 121 of from 2 to 18 dg/min; characterized in that the pipe composition extrudes at an advantageously low melt temperature and at an advantageously high specific throughput. Also provided is a method of forming a pipe comprising in embodiment providing a filler composition comprising from 5 to 50 wt % of a filler and from 95 to 50 wt % of a low density polyethylene and from 0 to 3 wt % of one or more stabilizers; then melt blending the filler composition and a high density polyethylene having a density of from 0.940 to 0.980 g/cm3, and an I21 of from 2 to 18 dg/min to a target drop temperature of from 16° C. to 185° C.

Abstract: A process for the production of EPDM comprising reacting ethylene, propylene, ethylidene norbornene, and hydrogen, in the gas phase, in a fluidized bed, under polymerization conditions, in the presence of a catalyst system comprising:(a) the reaction product of a vanadium compound and a electron donor;(b) at least one modifier having the formula BX.sub.3 or AlR.sub.(3-a) X.sub.a wherein each R is alkyl or aryl and is alike or different; each X is independently chlorine, bromine, or iodine; and a is 0, 1, or 2,wherein components (a) and (b) are impregnated into an inorganic support;(c) a halocarbon promoter; and(d) a hydrocarbyl aluminum cocatalyst with the following proviso:(i) the partial pressure of ethylene is in the range of about 25 to about 200 psi;(ii) the molar ratio of propylene to ethylene is in the range of about 0.2:1 to about 2:1;(iii) the molar ratio of hydrogen to ethylene is in the range of about 0.0001:1 to about 0.01:1; and(iv) the amount of ethylidene norbornene is about 1.

Abstract: A process for the production of EPDM comprising reacting ethylene, propylene, ethylidene norbornene, and hydrogen, in the gas phase, in a fluidized bed, under polymerization conditions, in the presence of a catalyst system comprising:(a) a titanium based catalyst having the formula Mg.sub.a Ti(OR).sub.b X.sub.c (ED).sub.d whereinR is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms or COR' wherein R' is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms;each OR group is alike or different;each X is independently chlorine, bromine, or iodineED is an electron donora is 0.5 to 56;b is 0, 1, or 2;c is 2 to 116; andd is greater than 1.5 a+2;(b) at least one modifier having the formula BX.sub.3 or AlR.sub.(3-b) X.sub.