Mitsui Chemicals, Inc.

Hideyuki Kaneko

Norio Kashiwa

Tomoaki Matsugi

Nobuo Kawahara

Shingo Matsuo

Shinichi Kojoh

Shin-Ichi Kojoh

Junji Saito

Terunori Fujita

Keiji Okada

Makoto Mitani

Tadahito Nobori

Hosei Shinoda

Yoshiho Sonobe

Shigekazu Matsui

Satoru Moriya

Ryoji Mori

Munehito Funaya

Sadahiko Matsuura

Toshiyuki Hirose

Seiji Ota

Yasushi Nakayama

Kouichi Kizu

Yasuhiko Suzuki

Taku Koda

Tooru Tanaka

Takeshi Kashima

Fumio Kageyama

Takayuki Onogi

Naritoshi Hirota

Masahiro Enna

Junji Tan

Yuichi Matsuda

Kazuhisa Miyazaki

Nobuhisa Mikawa

Shunichi Hama

Hideki Bandoh

A hybrid polymer has a structure in which a polyolefin segment and a polar polymer segment are connected not via a bonding group containing a heteroatom. A method of the invention produces the hybrid polymer with industrial advantages. The hybrid polymer includes a polyolefin segment (A) and a polar polymer segment (B), the polar polymer segment being obtained by radical polymerization of a radically polymerizable monomer.

Hybrid polymer and method for production thereof

A modified polyolefin resin comprising a copolymer having a structure that a propylene-based polyolefin segment (a) and a segment (b) containing a lactic acid as a constituent are bonded in a block state and/or a graft state through a vinyl monomer having a hydroxyl group, wherein a number average molecular weight of the propylene-based polyolefin segment (a) is from 1,000 to 100,000, a number average molecular weight of the segment (b) containing lactic acid as a constituent is from 1,000 to 200,000, and a weight composition of the propylene-based polyolefin segment (a) and the segment (b) containing lactic acid as a constituent is from 10/90 to 90/10. The modified polyolefin resin can be used in a resin composition containing an aliphatic polyester resin (A), a polyolefin resin (B) and the modified polyolefin resin (C). The composition can exhibit excellent heat resistance and impact resistance and can be used for molding various parts.

Aliphatic polyester resin composition containing copolymer

A novel olefin-based polymer has excellent thermal resistance, as well as excellent balance among various properties. The olefin-based polymer is an olefin-based polymer comprising 50 to 100% by weight of a constituent unit derived from 4-methyl-1-pentene, and 0 to 50% by weight of a constituent unit derived from at least one olefin selected from olefins having 2 to 20 carbon atoms except 4-methyl-1-pentene, and having the following properties: i) the diad isotacticity is 70% or greater, ii) the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) as measured by gel permeation chromatography (GPC) is in the range of 1.0 to 3.5, and iii) the intrinsic viscosity [&#x3b7;] is 0.5 (dl/g) or greater.

Olefin-based polymers and uses thereof

A group of polymers comprising a plurality of polyolefin chains and polar polymer chains and having a multi-branched structure such as a block structure, a graft structure and a star-shaped structure is produced efficiently by polymerizing or reacting a combination of various polar monomers and their polymers i.e. polar polymer chains by using a functional group-containing polyolefin as a macroinitiator, a macromonomer or a reactive polymer. The resulting multi-branched polymer has a specific shape such as a block structure, a graft structure or a star-shaped structure, and has properties of both the polyolefin and polar polymer, thus exhibiting useful performance in various uses in films and compatibilizing agents as a novel polyolefin-based polymer.

Multi-branched polymer, process for producing the same, and applications thereof

Olefin block copolymers (A-1) are disclosed represented by the formula (I) PO-g-B. . . (I) wherein POis a segment comprised of repeating units derived from an olefin having 2 to 20 carbon atoms, gis an ester, ether, amide, imide, urethane, urea, silylether or carbonyl linkage, and Bis a segment containing an unsaturated hydrocarbon or a hetero atom. The olefin block copolymers are suitable for uses in adhesives, various molded articles such as construction and civil engineering materials, automobile interior and exterior materials, gasoline tanks, electric and electronic parts, medical care and sanitation materials, materials of miscellaneous goods, resin materials having environmental degradation properties, films and sheets, modifiers and dispersions.

Olefin block copolymers, processes for producing the same and uses thereof

A novel graft polymer useful in various uses that has a polyolefin backbone having polyolefin segments excellent in moldability can be obtained by homopolymerizing a novel polyolefin macromonomer or polymerizing the novel polyolefin macromonomer in the coexistence of other olefins depending on need, wherein the macromonomer has at the terminal of its polyolefin chain a vinyl group whose &#x3b1;-position may be substituted, and the macromonomer can be efficiently obtained by a method, for example, successively carrying out i) a step of producing a polyolefin having a hydroxyl group at the terminal of the polyolefin chain and ii) a step of converting the terminal hydroxyl group of the polyolefin in chain into an acryloyl group, a methacryloyl group or a styryl group.

Polyolefin macromonomer, graft polymer obtained from the polyolefin macromonomer, and use thereof

A branched olefin copolymer demonstrating excellent performance in various uses, comprising a building block (A) represented by formula (1) below and a building block (B) represented by formula (2) below, obtained by e.g. a method which involves sequentially conducting (step 1) a step of synthesizing a polar group-containing olefin copolymer (Q) containing at least one functional group (G) selected from a hydroxyl group, a carboxylic acid group, an ester group, an amino group, an epoxy group, a silanol group and an acid anhydride group, (step 2) a step of converting the functional group (G) into a group having an ability to initiate radical polymerization, and (Step 3) a step of installing a polymer segment (Z) by radical polymerization of a monomer essentially comprising carbon-carbon double bond-containing compound (R) containing at least one selected from an oxygen atom, a nitrogen atom, a halogen atom and an aryl group;

Branched olefin copolymer, process for producing the same, and use thereof

A novel olefin polymerization catalyst is provided which comprises (A) a transition metal compound or lanthanoid compound containing two or more atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur, and selenium; and (B) a Lewis acid. A process for producing an olefin polymer is also provided. The catalyst has a high olefin polymerization activity without a combined use of an expensive organoaluminum oxy-compound or organoboron compound, and can maintain the high activity for a long polymerization time.

Olefin polymerization catalyst and process for producing olefin polymer with the catalyst

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Sodegaura, Japan

Hideyuki Kaneko