Described herein are polymer blends comprising (a) a propylene impact copolymer comprising a polypropylene component present in a continuous phase and a first elastomeric component present in a disperse phase; and (b) a second elastomeric component, and the interfacial tension between the second elastomeric component and the impact copolymer is at least 1.2 mN/m. The polymer blends of present invention provides improved gloss and impact properties.

According to an embodiment of the present invention, there is provided a method of preparing a rubber composition, which includes (a) synthesizing a living polymer by solution polymerization of a monomer mixture including a conjugated diene-based monomer in the presence of a first catalyst; (b) reacting some ends of the living polymer with a coupling agent; (c) reacting the remaining ends of the living polymer with an organotin halide compound to prepare an end-modified conjugated diene-based polymer solution; and (d) adding a second catalyst and a conjugated diene-based monomer to the end-modified conjugated diene-based polymer solution to induce solution polymerization.

A styrene resin having a syndiotactic structure, with an endothermic amount in a range of 175 to 260? C. of less than 30% based on the total endothermic amount, and a styrene resin composition containing 50 to 95% by mass of a thermoplastic resin composition and 5 to 50% by mass of a glass filler, the thermoplastic resin composition containing 100 parts by mass containing 80 to 100% by mass of a styrene resin having a syndiotactic structure and 0 to 20% by mass of a rubbery elastic material, 0.2 to 2.0 parts by mass of at least one kind of an antioxidant selected from a phenol-based antioxidant and a sulfur antioxidant, 1.5 to 5.0 parts by mass of at least one kind of a compound selected from a polyphenylene ether or a modified polyphenylene ether, and at least one kind selected from a nucleating agent or a release agent.

A styrene resin having a syndiotactic structure, with an endothermic amount in a range of 175 to 260? C. of less than 30% based on the total endothermic amount, and a styrene resin composition containing 50 to 95% by mass of a thermoplastic resin composition and 5 to 50% by mass of a glass filler, the thermoplastic resin composition containing 100 parts by mass containing 80 to 100% by mass of a styrene resin having a syndiotactic structure and 0 to 20% by mass of a rubbery elastic material, 0.2 to 2.0 parts by mass of at least one kind of an antioxidant selected from a phenol-based antioxidant and a sulfur antioxidant, 1.5 to 5.0 parts by mass of at least one kind of a compound selected from a polyphenylene ether or a modified polyphenylene ether, and at least one kind selected from a nucleating agent or a release agent.

Unsaturated and hydrogenated polyalpha-olefin products can be made with a high selectivity toward vinylidenes and tri-substituted vinylenes combined, a high selectivity toward vinylidenes, and a low selectivity toward 1,2-di-substituted vinylenes by using a catalyst system comprising a metallocene compound having the following structure in the polymerization reaction:

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Methods for the production of heterophasic polymers in gas and slurry phase polymerization processes, and polymer compositions made therefrom, are disclosed herein.

The invention relates to blends of at least one single-site catalyst polyethylene and at least one single-site catalyst syndiotactic polypropylene with a specific syndiotactic polypropylene content .sub.PP in weight percent relative to the total weight of both the polyethylene and the syndiotactic polypropylene contained in the blend corresponding to:

[00001]$\begin{array}{cc}{}_{\mathrm{PP}}=.Math.\frac{100.Math..Math.\mathrm{MI}.Math..Math.2_{\mathrm{PE}}}{{\mathrm{MFI}}_{\mathrm{PP}}+\mathrm{MI}.Math..Math.2_{\mathrm{PE}}}& \left(I\right)\end{array}$

with being at most 1.40, MI2.sub.PE being the melt flow index of the polyethylene as measured according to ISO 1133 at 190 C. under a load of 2.16 kg and MFI.sub.PP being the melt flow index of the syndiotactic polypropylene as measured according to ISO 1133 at 230 C. under a load of 2.16 kg. The blends show improved impact properties at temperatures below 0 C. The invention is also directed to a process for producing said blends, as well as to articles produced from these blends.

The invention relates to blends of at least one single-site catalyst polyethylene and at least one single-site catalyst syndiotactic polypropylene with a specific syndiotactic polypropylene content .sub.PP in weight percent relative to the total weight of both the polyethylene and the syndiotactic polypropylene contained in the blend corresponding to:

[00001]$\begin{array}{cc}{}_{\mathrm{PP}}=.Math.\frac{100.Math..Math.\mathrm{MI}.Math..Math.2_{\mathrm{PE}}}{{\mathrm{MFI}}_{\mathrm{PP}}+\mathrm{MI}.Math..Math.2_{\mathrm{PE}}}& \left(I\right)\end{array}$

with being at most 1.40, MI2.sub.PE being the melt flow index of the polyethylene as measured according to ISO 1133 at 190 C. under a load of 2.16 kg and MFI.sub.PP being the melt flow index of the syndiotactic polypropylene as measured according to ISO 1133 at 230 C. under a load of 2.16 kg. The blends show improved impact properties at temperatures below 0 C. The invention is also directed to a process for producing said blends, as well as to articles produced from these blends.

A fiber-reinforced polymer composition that contains a polymer matrix and a plurality of long reinforcing fibers that are distributed within the polymer matrix is provided. The polymer matrix contains a propylene polymer and constitutes from about 30 wt. % to about 90 wt. % of the composition. The fibers constitute from about 10 wt. % to about 70 wt. % of the composition. Further, the polymer composition exhibits a spiral flow length of about 450 millimeters or more as determined in accordance with ASTM D3121-09 and a volatile organic content of about 100 micrograms per gram or less as determined by VDA 277.

A lubricant composition comprising a high-viscosity PAO lubricant base stock having a KV100 of at least 200 cSt and comprising multiple PAO molecules comprising at least 200 carbon atoms per molecule, wherein (i) each of the PAO molecules comprises multiple pendant groups; (i) the average pendant group length of all the pendant groups excluding one methyl on each of the PAO molecules among at least 90 mol % of all of the PAO molecules, if one or more methyl is present, is at least 6.0, and (iii) the concentration of the high-viscosity PAO base stock is no more than 75 wt % of the total weight of the lubricant composition. The lubricant composition exhibits provides a high degree of protection of gear surfaces as measured by ASTM D5182.