Mitsui Chemicals, Inc.

Tomoaki Matsugi

Norio Kashiwa

Shinichi Kojoh

Terunori Fujita

Junji Saito

Hideyuki Kaneko

Yasunori Yoshida

Shigekazu Matsui

Nobuo Kawahara

Shingo Matsuo

Takashi Nakano

Yasushi Yanagimoto

Naoto Matsukawa

Tatsuya Nakamura

Makoto Mitani

Kazutaka Tsuru

Seiichi Ishii

Yasuhiko Suzuki

Yoshihisa Inoue

Junichi Mohri

Yukihiro Takagi

Hidetsugu Tanaka

Shin-Ichi Kojoh

Keiji Okada

Yasushi Tohi

Yoshiharu Kikuchi

Kotaro Ichino

Keita Itakura

Sadahiko Matsuura

Ryoichi Tsunori

Masakazu Tanaka

Mikio Hosoya

Mitsunao Arino

Toyoaki Sasaki

Keisuke Shishido

Akihiko Iwashita

Tadahito Nobori

Hosei Shinoda

Shigenobu Ikenaga

Satoru Moriya

Ryoji Mori

Munehito Funaya

Toshiyuki Hirose

Takashi Oda

Ryousuke Kaneshige

Seiji Ota

Katsutoshi Kinoshita

Kouichi Kizu

Taku Koda

Takeshi Kashima

Takayuki Onogi

Fumio Kageyama

Tooru Tanaka

Naritoshi Hirota

Masahiro Enna

Haruka Saito

Junji Tan

Yuichi Matsuda

Shigeo Kiba

Hiroshi Miyasako

Nobuhisa Mikawa

Hirohiko Murase

Masatoshi Chinaka

Satoru Kinouchi

Tateo Takashima

Kazuhisa Miyazaki

Shunichi Hama

Katsuhiro Esashika

Makoto Kiya

Akiko Odawara

Makato Mitani

A 4-methyl-1-pentene polymer particle (X) which satisfies the following requirements (X-a), (X-b) and (X-c): (X-a) being composed of a 4-methyl-1-pentene polymer which has a content of a constitutional unit derived from 4-methyl-1-pentene being 30.0 to 99.7% by mol, and a content of a constitutional unit derived from at least one olefin selected from ethylene and an &#x3b1;-olefin having 3 to 20 carbon atoms (except for 4-methyl-1-pentene) being 0.3 to 70.0% by mol; (X-b) having, when measured in a cross fractionation chromatograph apparatus (CFC) using an infrared spectrophotometer as a detector part, at least one peak A of an amount of a component eluted present in the range of 100 to 140&#xb0; C., and at least one peak B of an amount of a component eluted present at lower than 100&#xb0; C.; and (X-c) having a meso diad fraction (m) measured byC-NMR falling within the range of 95.0 to 100%.

4-methyl-1-pentene polymer particle and method for producing 4-methyl-1-pentene resin

A culture material including a 4-methyl-1-pentene polymer for cells, tissues, or organs, the culture material having a water contact angle at a culture surface of 50&#xb0; to 100&#xb0;, a sagging distance by a test method described below of 0 to 5 mm, and an oxygen permeation rate at a temperature of 23&#xb0; C. and a humidity of 0% of 4500 to 90000 cm/(m&#xd7;24 h&#xd7;atm). A test piece having the same material as the culture material and the same thickness as the culture surface of the culture material and having a flat plate shape of 100 mm long and 10 mm wide is made. The test piece is fixed onto a test board in a state where the test piece protrudes lengthwise in a horizontal direction from a top surface of the test board, the top surface being horizontal.

Culture material and use thereof

A 4-methyl-1-pentene polymer (X) wherein a content of a constitutional unit derived from 4-methyl-1-pentene is 90 to 100% by mol; a content of a constitutional unit derived from at least one olefin selected from ethylene and an &#x3b1;-olefin, other than 4-methyl-1-pentene, having 3 to 20 carbon atoms is 0 to 10% by mol; and the 4-methyl-1-pentene polymer satisfies certain requirements (a) to (f): (a) a meso diad fraction (m) measured byC-NMR falling within a certain range; (b) a ratio of weight-average molecular weight Mw within a certain range; (c) a melt flow rate (MFR) within a certain range; (d) a cumulative weight fraction within a certain range; (e) a proportion of a polymer having a molecular weight of a certain range; and (f) a heat of fusion and a melting point of the 4-methyl-1-pentene polymer within certain ranges.

4-methyl-1-pentene polymer, resin composition and molded article

The cyclic olefin copolymer composition of the present invention includes a cyclic olefin copolymer (m) including a specific amount of a specific repeating unit and a cyclic olefin copolymer (n) different from the cyclic olefin copolymer (m). The cyclic olefin copolymer (n) includes at least one type selected from a copolymer (n1) of ethylene or &#x3b1;-olefin and cyclic olefin (where the copolymer (n1) does not include a repeating unit derived from specific cyclic non-conjugated dienes) and a cyclic olefin ring-opening polymer (n2), and when a total amount of the cyclic olefin copolymer (m) and the cyclic olefin copolymer (n) is 100% by mass, a content of the cyclic olefin copolymer (m) is 5% by mass or more to 95% by mass or less, and a content of the cyclic olefin copolymer (n) is 5% by mass or more to 95% by mass or less.

Cyclic olefin copolymer composition and cross-linked product thereof

A novel ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer comprising structural units derived from ethylene (A), an &#x3b1;-olefin (B) of 3 to 20 carbon atoms, and a non-conjugated polyene (C) containing intramolecularly two or more partial structures in total selected from the group consisting of structures of Formulae (I) and (II), and having a small number of long-chain branches,  The novel ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer contains a non-conjugated polyene such as VNB as a copolymerization component and a small long-chain branch content and is excellent in curing properties in the case of crosslinking using peroxide; and a process for producing the ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer, and a use thereof are provided.

Ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer, and production process and use thereof

An olefin resin having requirements (I) to (VI) is provided: (I) a grafted olefin polymer containing a main chain with an ethylene/&#x3b1;-olefin copolymer and a side chain with a propylene polymer; (II) the ratio P wt % of propylene polymer is from 5 to 60 wt %; (III) when the ratio of the amount of a component(s) having a peak temperature of a differential elution curve as measured by CFC using o-dichlorobenzene of less that 65&#xb0; C., to the amount of (&#x3b2;) taken as E wt %, the value a represented by an equation (Eq-1), is 1.4 or more; (IV) the melting point (Tm) is 120 to 165&#xb0; C. and the glass transition temperature (Tg) is &#x2212;80 to &#x2212;30&#xb0; C., as measured by DSC; (V) the hot xylene-insoluble content is less than 3 wt %; and, (VI) the limiting viscosity as measured in decalin at 135&#xb0; C. is 0.5 to 5.0 dl/g.

Olefin-based resin, method for producing same and propylene-based resin composition

The present invention provides an olefin resin with an improved heat resistance, reduced stickiness, excellent optical and low temperature properties, as well as the balance between these physical properties. The olefin resin according to the present invention satisfies the following requirements: (I) a melting peak (Tm) is observed within the range of from 60&#xb0; C. to 130&#xb0; C., and the heat of fusion &#x394;H at the melting peak is within the range of from 5 to 150 J/g; (II) the percentage E (wt %) of a portion soluble in o-dichlorobenzene at 20&#xb0; C. or lower, and the heat of fusion &#x394;H satisfy certain relationships; (III) the glass transition temperature (Tg) is from &#x2212;80 to &#x2212;30&#xb0; C.; (IV) the spin-spin relaxation time (T2) of a component having the highest mobility, as obtained in a four-component approximation with a Lorentzian function performed for a free induction decay curve, is within the range of from 150 to 500 ms, and the abundance ratio of the component is within the range of from 15 to 50%; and (V) the intrinsic viscosity [&#x3b7;] as measured in decalin at 135&#xb0; C. is within the range of from 0.1 to 12 dl/g.

Olefin resin and method for producing same

An object of the present invention is to provide a propylene-based resin composition capable of providing a molded article having an excellent balance between rigidity and impact resistance. The object can be achieved by a propylene-based resin composition including an olefin-based resin characterized by including a grafted ethylene-based copolymer having an ethylene polymer as a side chain.

Propylene-based resin composition

Olefin polymer with narrow molecular weight distribution and specific molecular weight, olefin polymer having functional group introduced at terminal, tapered polymer containing segment wherein monomer composition continuously changes in the polymer chain, olefin polymer having different segments bonded to each other, and process for preparing these polymers. The olefin polymers are polymers of Ccarbon atom olefins and have a number-average molecular weight of &#x2267;500 and Mw/Mn of &#x2266;1.5. In syntheses, an olefin of 2-20 carbon atoms is polymerized in the presence of a catalyst comprising a transition metal compound represented by the formula LMXwherein M is a transition metal atom of Group 3-11, m is 1-5, n is a number satisfying a valence of M, L is a ligand&#x2014;coordinated to the central metal M&#x2014;which contains a heteroatom having no direct bond to the central metal, and X is e.g. halogen or a hydrocarbon.

Olefin polymer and process for preparing the same

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

The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5. In the process for preparing an olefin polymer, an olefin of 2 to 20 carbon atoms is polymerized in the presence of an olefin polymerization catalyst comprising a transition metal compound represented by, for example, the following formula (I):LMX&#x2003;&#x2003;(I)wherein M is a transition metal atom of Group 3 to Group 11 of the periodic table, m is 1 to 5, n is a number satisfying a valence of M, L is a ligand coordinated to the central metal M and is a ligand containing a heteroatom having no direct bond to the central metal, and X is a halogen atom, a hydrocarbon group or the like.

Growing community of inventors

Sodegaura, Japan

Tomoaki Matsugi