A system including a dump tank to receive a reactor product comprising a polymer and hydrocarbons, including liquid hydrocarbons, the dump tank including a vessel with a reactor product inlet, a motive gas inlet, a purge gas inlet, gas outlet(s), and a fluid outlet, the motive gas inlet for introducing a motive gas into the vessel, the purge gas inlet for introducing a purge gas into the vessel, the one or more gas outlets located at a top of the vessel and the fluid outlet located at a bottom of the vessel and fluidly connected with a dump tank fluid outlet line having a dump tank outlet valve to control flow of fluid out of the dump tank via the fluid outlet; and a strainer fluidly connected with the dump tank fluid outlet line to allow passage of liquid hydrocarbons therethrough into a hydrocarbon outlet line.

The invention relates to a novel process for the preparation of 2,2′-bis indenyl biphenyl ligands of following formula (3): The invention also relates to metallocene complexes prepared using the novel process for the preparation of 2,2-bis indenyl biphenyl ligands. The invention also relates to novel intermediates used in the process for the preparation of 2,2′-bis indenyl biphenyl ligands. ##STR00001##

The present invention relates to a transition metal compound that may exhibit high activity in olefin polymerization, and easily control the properties of synthesized olefin polymer such as a chemical structure, molecular weight distribution, a mechanical property, and the like, a catalyst composition comprising the same, and a method for olefin polymerization using the catalyst composition.

The present invention relates to a transition metal compound that may exhibit high activity in olefin polymerization, and easily control the properties of synthesized olefin polymer such as a chemical structure, molecular weight distribution, a mechanical property, and the like, a catalyst composition comprising the same, and a method for olefin polymerization using the catalyst composition.

Provided is a solid catalyst component for polymerization of an olefin which is capable of realizing stereoregularity and wide molecular weight distribution of the resulting polymer, copolymerization activity, and block ratio of the resulting copolymer in a well-balanced manner while satisfying these properties at a level sufficient for practical use despite containing an electron-donating compound other than a phthalic acid ester. The present invention provides a solid catalyst component for polymerization of an olefin, comprising: magnesium, titanium, halogen, an ether carbonate compound (A), and a succinic acid diester compound (B), wherein a molar ratio represented by the following expression is 0.01 to 1.00: content of the ether carbonate compound (A)/content of the succinic acid diester compound (B).

The invention provides a triacrylate compound represented by the following formula (1). In the formula, each R is independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a halogen atom, R.sup.1 and R.sup.2 are each independently a linear or branched alkyl group having 1 to 6 carbon atoms, and R.sup.3 is a linear or branched alkyl group having 1 to 6 carbon atoms or a hydroxymethyl group.

The invention provides a triacrylate compound represented by the following formula (1). In the formula, each R is independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a halogen atom, R.sup.1 and R.sup.2 are each independently a linear or branched alkyl group having 1 to 6 carbon atoms, and R.sup.3 is a linear or branched alkyl group having 1 to 6 carbon atoms or a hydroxymethyl group.

Disclosed is a flame retardant resin composition comprising a polyolefin resin, calcium carbonate particles blended at a ratio of 5 pts. mass to 80 pts. mass, aluminum hydroxide blended at a ratio of 50 pts. mass to 125 pts. mass, a silicone-based compound blended at a ratio of more than 1 pt. mass and 10 pts. mass or less, a fatty acid-containing compound blended at a ratio of 3 pts. mass to 20 pts. mass, and a zinc-containing inorganic compound blended at a ratio of 1 pt. mass to 7 pts. mass, all relative to 100 pts. mass of the polyolefin resin. In the flame retardant resin composition, the calcium carbonate particles and the aluminum hydroxide are blended in total at a ratio of 55 pts. mass to 130 pts. mass relative to 100 pts. mass of the polyolefin resin.

Disclosed is a flame retardant resin composition comprising a polyolefin resin, calcium carbonate particles blended at a ratio of 5 pts. mass to 80 pts. mass, aluminum hydroxide blended at a ratio of 50 pts. mass to 125 pts. mass, a silicone-based compound blended at a ratio of more than 1 pt. mass and 10 pts. mass or less, a fatty acid-containing compound blended at a ratio of 3 pts. mass to 20 pts. mass, and a zinc-containing inorganic compound blended at a ratio of 1 pt. mass to 7 pts. mass, all relative to 100 pts. mass of the polyolefin resin. In the flame retardant resin composition, the calcium carbonate particles and the aluminum hydroxide are blended in total at a ratio of 55 pts. mass to 130 pts. mass relative to 100 pts. mass of the polyolefin resin.

[Problem to be Solved]

There is provided a process for producing an olefin polymer that is capable of producing an olefin polymer having high heat resistance and high molecular weight with excellent catalytic activity.

[Solution to Problem]

The process for producing an olefin polymer includes a step of polymerizing at least one olefin selected from ethylene and α-olefins having 4 to 30 carbon atoms in the presence of an olefin polymerization catalyst containing a transition metal compound represented by the general formula [I], the olefin polymer including constituent units derived from ethylene and α-olefins having 4 to 30 carbon atoms in a total amount between more than 50 mol % and not more than 100 mol %,

##STR00001##

[in the formula [I], R.sup.1, R.sup.3 and R.sup.5 to R.sup.16 are each independently a hydrogen atom, a hydrocarbon group or the like; R.sup.2 is a hydrocarbon group or the like; R.sup.4 is a hydrogen atom; M is a transition metal of Group IV; Q is a halogen atom or the like; and j is an integer of 1 to 4].