Idemitsu Kosan Company, Limited

Idemitsu Petrochemical Co., Ltd.

Norio Tomotsu

Mizutomo Takeuchi

Hiroshi Maezawa

Shoji Naganuma

Masahiko Kuramoto

Yoshiaki Aoyama

Hajime Shouzaki

Masami Watanabe

Tsuyoshi Kondoh

Nobuhiro Yabunouchi

Hideo Teshima

Koji Yamamoto

Satoshi Ikeuchi

Yoshiharu Tsujita

Catalysts for polymerizing styrene and other monomer and process for producing styrene polymer

( ) An adsorbent comprising a styrene polymer, which is producing by dissolving a substantially syndiotactic styrene polymer in an organic compound having an affinity for the polymer, followed by shaping it, and thereafter removing the organic compound from the shaped article. ( ) For producing the adsorbent ( ), the polymer solution is melt-cast into the shaped article. ( ) For producing the adsorbent ( ) or ( ), the organic compound is removed from the shaped article through evaporation under reduced pressure. The adsorbent provided herein is effective for selectively and efficiently adsorbing an organic compound in gases or liquids.

Adsorbents made of styrene polymers

In the present invention, the polymer composition is produced by polymerizing an anionically or cationically polymerizable monomer in the presence of a highly syndiotactic styrenic polymer and optionally a rubber-like polymer. The polymer composition thus obtained is improved in its solvent resistance without using any particular compatibilizer and has a good moldability.

Process for producing polymer composition

An organic aluminoxy compound which shows,Al nuclear magnetic resonance spectrum (,Al-NMR spectrum) having an A,/A,ratio of at most 0.1, wherein A,is area of a region encompassed by a segment of a line which connects a local minimum point existing between a continuous curve &ldquo;a&rdquo; containing a peak appearing at around 150 ppm and a continuous curve &ldquo;b&rdquo; containing a peak appearing at around 60 ppm to the point where the above curve &ldquo;b&rdquo; comes into contact with the base line and also by the above curve &ldquo;b&rdquo; and A,is area of a region encompassed by the above curves &ldquo;a&rdquo; and &ldquo;b&rdquo; and also by the base line; an organic aluminoxy compound containing at least 5%, expressed in terms of aluminum atom, of a portion insoluble in a mixed solvent of toluene and hexane in a ratio by volume of 2:5 at 30&deg; C. or lower; and a catalyst for producing a polymer comprising any of the above organic aluminoxy compounds and a transition metal compound. The above catalyst is a homogeneous catalyst having high and stable activity and used for polymerization of olefins and styrenes.

Organic aluminoxy compound and catalyst for producing polymer

There is disclosed a process for producing a styrenic polymer, especially, syndiotactic polystyrene, which comprises polymerizing a styrenic monomer by the use of (a) a transition metal compound, (b) a coordination complex compound comprising an anion in which a plurality of radicals are bonded to a metal and a cation or methylaluminoxane, (c) an alkylating agent (alkyl group-containing aluminum, magnesium or zinc compound) and (d) a reaction product between a straight-chain alkylaluminum having at least two carbon atoms and water (alkylaluminoxane). The above process is capable of simplifying the production process and producing high-performance styrenic polymer having a high degree of syndiotactic configuration in high catalytic activity without deteriorating the catalyst activity, increasing the amounts of residual metals in the objective polymer or leaving the decomposition products of the alkylaluminum therein, thereby curtailing the production cost of the objective polymer.

Process for producing styrenic polymer

A styrene type monomer is polymerized by use of a catalyst consisting of (a) a transition metal compound, (b1) a compound capable of forming an ionic compound by reacting with the transition metal compound, and if necessary (d) an alkylating agent, which comprises subjecting to a polymerization reaction a monomer to which (c) an oxygen-containing compound having a branched alkyl group, or (c) said oxygen-containing compound and (d) all or a part of an alkylating agent have previously been added, or by a process for producing a polymer in which a monomer particularly a styrene type monomer is polymerized by use of a catalyst consisting of (a) a transition metal compound, (b1) a compound capable of forming an ionic compound by reacting with the transition metal compound, (b2) a specific oxygen-containing compound, and if necessary (d) an alkylating agent, which comprises subjecting to a polymerization reaction a monomer to which (c) an oxygen-containing compound having a branched alkyl group, or (c) said oxygen-containing compound and (d) all or a part of an alkylating agent have previously been added.

Process for producing polymer

Polymerization catalyst and process for producing polymers

An organic aluminoxy compound which shows .sup.27 Al nuclear magnetic resonance spectrum (.sup.27 Al-NMR spectrum) having an A.sub.1 /A.sub.2 ratio of at most 0.1, wherein A.sub.1 is area of a region encompassed by a segment of a line which connects a local minimum point existing between a continuous curve 'a' containing a peak appearing at around 150 ppm and a continuous curve 'b' containing a peak appearing at around 60 ppm to the point where the above curve 'b' comes into contact with the base line and also by the above curve 'b' and A.sub.2 is area of a region encompassed by the above curves 'a' and 'b' and also by the base line; an organic aluminoxy compound containing at least 5%, expressed in terms of aluminum atom, of a portion insoluble in a mixed solvent of toluene and hexane in a ratio by volume of 2:5 at 30.degree. C. or lower; and a catalyst for producing a polymer comprising any of the above organic aluminoxy compounds and a transition metal compound. The above catalyst is a homogeneous catalyst having high and stable activity and used for polymerization of olefins and styrenes.

There is disclosed a process for producing a styrenic polymer which comprises polymerizing at least one styrenic monomer by the use of a polymerization catalyst comprising in combination (A) at least one transition metal compounds, (B) an aluminoxane, (C) a coordination complex compound comprising a cation and an anion in which a plurality of radicals are bonded to a metal and (D) an organoaluminum compound. The above process is capable of producing a styrenic polymer which has high degree of syndiotactic configuration and a wide range of molecular weight distribution and is minimized in residual metallic components at a low production cast with a high efficiency.

Growing community of inventors

Ichihara, Japan

Norio Tomotsu