A process comprising combining a polymerization catalyst with propylene at a polymerization temperature to produce polypropylene granules having an MFR1, wherein the temperature of the polypropylene granules is maintained at least at the polymerization temperature; mixing the polypropylene granules with an organic peroxide at a temperature of at least the polymerization temperature for a residence time of at least 40 seconds at a temperature below the melting point temperature of the polypropylene granules to form a polypropylene product having an MFR2, wherein MFR1 is greater than MFR2.

The present invention is directed to a new heterophasic polypropylene composition showing a good balance between stiffness and impact at low haze, as well as to its use for injection molded articles. The present invention is also directed to provide such heterophasic polypropylene composition in a more simplified mode of production.

A process for increasing MFR.sub.2 of a polyethylene copolymer or an ethylene plastomer or elastomer comprising: (I) extruding a copolymer of polyethylene copolymer having a density of 910 to 970 kg/m.sup.3 and an MFR.sub.2 of 1 and 100 g/10 min or an ethylene plastomer or elastomer having a density of 855 to 910 kg/m.sup.3 and an MFR.sub.2 of 0.5 and 100 g/10 min in the presence of 0.1 to 2 wt % of a non-peroxide radical initiator so as to produce a polyethylene copolymer having an MFR.sub.2 of 200 g/10 min or more, or an ethylene plastomer or elastomer having a MFR.sub.2 of 200 g/10 min or more.

Low molecular weight polytetrafluoroethylene powder having a complex viscosity of 110.sup.2 to 710.sup.5 Pa.Math.s at 380 C., containing 5 or less carboxyl groups at ends of the molecule chain per 10.sup.6 carbon atoms in the main chain, and being substantially free from C8-C14 perfluorocarboxylic acids and salts thereof. Also disclosed is a method for producing low molecular weight polytetrafluoroethylene.

This invention relates to a novel one-pot process for polyolefin modification to form long-chain branched polymers containing polar functional groups, and the long-chain branched polymer resulting from the process. The process comprises reacting the following components (a) through (d) in a one pot process to form a long-chain branched polyolefin. Component (a) is a polyolefin; component (b) includes one or more silane compounds having the formula RSiR.sub.nR.sub.(3-n), component (c) is an ethylenically unsaturated polycarboxylic acid; and component (d) is a free radical initiator. In the formula RSiR.sub.nR.sub.(3-n) for component (b), R is an ethylenically or acetylenically unsaturated radical; R is a hydrolyzable group selected from the group consisting of an alkoxy, acyloxy, alkylamino, and arylamino; R is a hydrocarbyl group having 1 to 6 carbon atoms; and n is 1, 2, or 3.

Polymer compositions may include a matrix phase comprising a polypropylene-based polymer; and an elastomeric rubber phase; wherein the polymer composition has melt flow rate (MFR) according to ASTM D1238 at 230 C./2.16 kg equal to or greater than 90 g/10 min and at least one feature selected from (I) an Izod impact resistance according to ASTM D256A at 23 C. equal to or greater than 400 J/m; (II) an instrumented drop impact at 30 C., average total energy, equal to or greater than 17 J; or (III) an instrumented drop impact at 30 C., average percent ductility, equal to or greater than 60%.

A process forming a high MFR polypropylene includes providing a reactor powder polypropylene, the reactor powder polypropylene having a melt flow rate of less than 100 dg/min. The process also includes mixing the reactor powder polypropylene with a free-radical initiator to form a powder/initiator mixture and subjecting the powder/initiator mixture to post-reactor forming. The present disclosure further provides for a vis-broken polypropylene and a polymer article.

A rheology modifier obtainable by polymerizing (i) at least one ethylenically unsaturated carboxylic acid; (ii) at least one nonionic ethylenically unsaturated surfactant monomer, (iii) at least one C.sub.1-C.sub.2-alkyl methacrylate, and (iv) at least one C.sub.2-C.sub.4-alkyl acrylate, where the alkyl chain length averaged over the number of alkyl groups of the alkyl acrylate is 2.1 to 4.0. The polymerization is carried out in the presence of at least one hydrocarbon comprising at least one XH-group, wherein X is selected from the group consisting of O, P, N and S. Liquid formulations and particles containing liquid detergents comprising the rheology modifier are also described.

The present invention is directed to a new heterophasic polypropylene composition showing a good balance between stiffness and impact at low haze, as well as to its use for injection molded articles. The present invention is also directed to provide such heterophasic polypropylene composition in a more simplified mode of production.

Provided is a reactor grade polypropylene suitable for injection molding applications comprising within a range from 0 wt % to 4 wt % ethylene and/or C4 to C12 -olefin derived units, the polypropylene produced from a single catalyst and single stage polymerization process, and having a melt flow rate (MFR, 230 C./2.16 kg) greater than 10 g/10 min, and a 1% secant flexural modulus of at least 250 kpsi (1720 MPa).