The present invention relates to a process for preparing an aqueous dispersion of multiphase occluded polymer particles comprising the steps of a) contacting, under emulsion polymerization conditions, first monomers and a chain transfer agent to form an aqueous dispersion of first polymer particles having a T.sub.g in the range of from −30° C. to 30° C.; then b) contacting the aqueous dispersion of first polymer particles with a second monomer under emulsion polymerization conditions to form an aqueous dispersion of second polymer particles occluded within the first polymer particles, wherein the first monomers a phosphorus acid monomer or a salt thereof; and the second monomer comprises at least 90 weight percent methyl methacrylate. The aqueous dispersion of occluded polymer particles arising from the process of the present invention is useful in a formulation that can be used to prepare a water-resistant blister free LASD coating.

The present disclosure relates to a modified conjugated diene-based polymer, a method for preparing the same and a rubber composition comprising the same, and the modified conjugated diene-based polymer has narrow molecular weight distribution, and includes S atoms in the specific content in the polymer, a derived unit from an N-containing aromatic hydrocarbon compound, a derived unit from an S-containing aromatic hydrocarbon compound or an S-containing heterocyclic compound.

The present disclosure relates to a modified conjugated diene-based polymer, a method for preparing the same and a rubber composition comprising the same, and the modified conjugated diene-based polymer has narrow molecular weight distribution, and includes S atoms in the specific content in the polymer, a derived unit from an N-containing aromatic hydrocarbon compound, a derived unit from an S-containing aromatic hydrocarbon compound or an S-containing heterocyclic compound.

The present application relates to a polypropylene composition having a melt flow rate MFR.2 (230° C.) measured according to ISO 1133 in the range of 5 to 50 g/10 min, to a composition comprising the polypropylene composition and one or more additive(s) in an amount of up to 4 wt.-%, based on the total weight of the composition, to a process for the preparation of the polypropylene composition and an article comprising the polypropylene composition as well as the use of the polypropylene composition for decreasing the brittle-to-ductile transition temperature.

The invention discloses a micro-interface strengthening reaction system for preparing poly-α-olefin, which includes: a first polymerization reactor and a second polymerization reactor that are connected with each other in sequence, wherein a first micro-interface generator is disposed outside the first polymerization reactor, and a second micro-interface generator is disposed inside the second polymerization reactor. A bottom of the second polymerization reactor is provided with a discharge port, and the discharge port is connected with a hydrogen halide removal tower. By disposing the first micro-interface generator in the first polymerization reactor while disposing the second micro-interface generator in the second polymerization reactor, on the one hand it increases the mass transfer area between the gas phase and the liquid phase material, improves reaction efficiency and reduces energy consumption, and on the other hand it results in a higher evenness of the poly-α-olefin and improved product quality.

The invention discloses a micro-interface strengthening reaction system for preparing poly-α-olefin, which includes: a first polymerization reactor and a second polymerization reactor that are connected with each other in sequence, wherein a first micro-interface generator is disposed outside the first polymerization reactor, and a second micro-interface generator is disposed inside the second polymerization reactor. A bottom of the second polymerization reactor is provided with a discharge port, and the discharge port is connected with a hydrogen halide removal tower. By disposing the first micro-interface generator in the first polymerization reactor while disposing the second micro-interface generator in the second polymerization reactor, on the one hand it increases the mass transfer area between the gas phase and the liquid phase material, improves reaction efficiency and reduces energy consumption, and on the other hand it results in a higher evenness of the poly-α-olefin and improved product quality.

Embodiments of methods for producing a trimodal polymer in a solution polymerization process comprise three solution polymerization reactors organized in parallel or in series.

Embodiments of methods for producing a trimodal polymer in a solution polymerization process comprise three solution polymerization reactors organized in parallel or in series.

The present invention relates to a cable jacket composition comprising a multimodal olefin copolymer, wherein said olefin copolymer has a density of 0.935-0.960 g/cm3 and MFR2 of 1.5-10.0 g/10 min and comprises a bimodal polymer mixture of a low molecular weight homo- or copolymer and a high molecular weight copolymer wherein the composition has ESCR of at least 2000 hours and wherein the numerical values of cable wear index and composition MFR2 (g/10 min) follow the correlation: Wear index<15.500+0.900*composition MFR2. The invention further relates to the process for preparing said composition and its use as outer jacket layer for a cable, preferably a communication cable, most preferably a fiber optic cable.

The present invention relates to a cable jacket composition comprising a multimodal olefin copolymer, wherein said olefin copolymer has a density of 0.935-0.960 g/cm3 and MFR2 of 1.5-10.0 g/10 min and comprises a bimodal polymer mixture of a low molecular weight homo- or copolymer and a high molecular weight copolymer wherein the composition has ESCR of at least 2000 hours and wherein the numerical values of cable wear index and composition MFR2 (g/10 min) follow the correlation: Wear index<15.500+0.900*composition MFR2. The invention further relates to the process for preparing said composition and its use as outer jacket layer for a cable, preferably a communication cable, most preferably a fiber optic cable.