Mitsui Chemicals, Inc.

Prime Polymer Co., Ltd.

Keita Itakura

Tatsuya Nakamura

Yasushi Tohi

Takashi Arai

Ryoichi Tsunori

Mikio Hashimoto

Tomoaki Matsugi

Ikunori Sakai

Satoshi Tamura

Takeshi Minoda

Nobuo Kawahara

Hiromu Kaneyoshi

Toshiyuki Ishii

Munehito Funaya

Masahiro Yamashita

Koji Kawai

Yasushi Yanagimoto

Masamichi Naito

Kazuhisa Matsunaga

Yuichi Yamamura

Kou Tsurugi

Naritoshi Hirota

Satoshi Hashizume

Toru Takaoka

Kenji Michiue

Akihiko Iwashita

Hiroshi Nishikawa

Rikuo Onishi

Hirofumi Goda

Mitsuo Kawata

Tokutaro Kimura

Toru Iwashita

Shuji Matsumura

Jun Birukawa

Yasuhiro Kai

Akihiro Inukai

Kunihiko Takesue

Masashi Higuchi

Tateo Takashima

Satoru Kinouchi

Kouichirou Yamamoto

Ayako Kadosaka

Yoshio Sasaki

Akiko Odawara

Naoya Noda

Ryoko Hiroi

Shino Naito

Takanori Furuta

Rikuo Ohnishi

A propylene polymer composition includes a propylene homopolymer (A) having an intrinsic viscosity [η] measured in a tetralin solvent at 135° C. in the range of 7 to 12 dl/g, a propylene polymer (B) having an intrinsic viscosity [η] in the range of not less than 0.21 dl/g and less than 0.54 dl/g, and having a proportion of a component eluted at a temperature of not more than −20° C. in TREF in the range of not more than 3.5 mass %, and a propylene polymer (C) having an intrinsic viscosity [η] in the range of not less than 0.54 dl/g and less than 2.6 dl/g, wherein the content of (A) is 0.5 to 47.5 mass %, the content of (B) is 5 to 95 mass % and the content of (C) is 2.5 to 85.5 mass %, based on the total of (A), (B) and (C).

Propylene polymer composition and shaped article

An object of the present invention is to provide a highly heat resistant and highly rigid propylene-based polymer having unprecedentedly high stereoregularity. The propylene-based polymer of the present invention satisfies requirements (1) to (4) and preferably requirement (5): (1) an average meso chain length is 800 to 100,000; (2) a MFR is 0.5 to 1,000 g/10 minutes; (3) a ratio of Mw to Mn, Mw/Mn, as measured by GPC is 4.2 to 20; (4) when the ratio of a component which elutes at a temperature of 122&#xb0; C. or more as measured by temperature rising elution fractionation (TREF) is A % by weight and the melt flow rate of the requirement (2) is B g/10 minutes, 100&#x2265;A&#x2265;20&#xd7;EXP(&#x2212;0.01&#xd7;B); (5) an amount of a component soluble in n-decane at 23&#xb0; C. is 0.01 to 2% by weight.

Propylene-based polymer, method for producing the same, propylene-based resin composition and molded article

Propylene polymers and propylene resin compositions containing the polymers are used as molded articles used under stress for a long period such as automotive parts, housing parts, home appliance parts and electric power tool parts. Stress-resistant molded articles of the invention are obtained from these materials. A propylene homopolymer (A) satisfies the following requirements (1) to (3), and a polypropylene resin composition contains the propylene homopolymer (A). (1) The ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) according to GPC is in the range of 1.2 to 3.5. (2) Mn is in the range of 35,000 to 400,000. (3) The content of components soluble in o-dichlorobenzene at 90&#xb0; C. is not more than 4 wt %.

Propylene homopolymer for stress-resistant molded article, composition containing the polymer, and stress-resistant molded articles obtained therefrom

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

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

[Object] To provide a polypropylene resin composition for use in the formation of a microporous membrane having excellent heat resistance and low thermal shrinkage ratio. [Solution] A polypropylene resin composition for use in the formation of a microporous membrane according to the present invention comprises as an essential component a propylene homopolymer (A) that satisfies the following requirements (1) to (4) and (7):

Polypropylene resin composition for use in formation of microporous membrane

The present invention provides a propylene-based block copolymer having high melt viscoelasticity, excellent balance between rigidity and impact resistance, good molding processability, and excellent molded product appearance, a composition containing the copolymer, and molded products obtained therefrom. The propylene-based block copolymer comprises 5 to 80% by weight of a room temperature n-decane-soluble portion (Dsol) and 20 to 95% by weight of a room temperature n-decane-insoluble portion (Dinsol) (the total amount of the Dsol and the Dinsol is 100% by weight), and satisfies the requirements [1] to [3]: [1] the molecular weight distribution (Mw/Mn) of the Dsol is 7.0 to 30, [2] the molecular weight distribution (Mw/Mn) of the Dinsol is 7.0 to 30, and Mz/Mw thereof is 6.0 to 20, and [3] the pentad fraction (mmmm) of the Dinsol is not less than 93%.

Propylene-based block copolymer, composition containing the copolymer, and molded products obtained therefrom

Long-fiber-reinforced thermoplastic resin particles and a blend thereof are provided, wherein the opening property of the reinforcing fibers during molding is good, and a molded body exhibiting an excellent appearance and having high mechanical strength is obtained. The particles (A) contain a thermoplastic resin (A), produced by using a metallocene catalyst, a modified polyolefin resin (A) modified with an unsaturated carboxylic acid or a derivative thereof, and reinforcing fibers (A) and satisfying additional requirements described herein.

Fiber-reinforced resin composition and molded body thereof

[Object] To provide a propylene homopolymer suitable for capacitor films having high withstand voltage and a stretched film formed by stretching the propylene homopolymer. [Solution] A propylene homopolymer of the present invention for capacitors satisfies the following requirements (i) to (v) and (ix): (i) the MFR is 1 to 10 g/10 minutes; (ii) the meso pentad fraction (mmmm) measured byC-NMR is 0.940 to 0.995; (iii) the integrted amount of elution at 90&#xb0; C. by CFC using o-dichlorobenzene is 0.5% by weight or less; (iv) the melting point measured using DSC is 152&#xb0; C. or more; (v) the chlorine content is 2 ppm by weight or less; and (ix) in an elution temperature-elution volume curve measured by cross-fractionation chromatography (CFC) using o-dichlorobenzene, the maximum peak has a peak top temperature in the range of 105&#xb0; C. to 130&#xb0; C. and half width of 7.0&#xb0; C. or less.

Propylene homopolymer for capacitors

Provided is a film for thermal sterilization packaging which is excellent in a total balance of characteristics such a transparency, an impact resistance, a heat sealing property, a blocking resistance, a heat resistance and the like. The film for thermal sterilization packaging according to the present invention is characterized by comprising:

Film for thermal sterilization packaging

An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C) in specified proportions. The polypropylene homopolymer (A1) exhibits an MFR (230&#xb0; C.) of 20 to 300 g/10 min, a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from aC-NMR spectrum, each of 0.05% or less, and an Mw/Mn, determined by GPC, of 1 to 3.

Automobile part of polypropylene resin composition

The present invention relates to a propylene random copolymer which satisfies the following requirements [1] to [4], and to various useful molded products obtained by molding the propylene random copolymer:

Propylene polymer particle method of producing the same and use thereof

An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C), or comprising a propylene block copolymer (A2) and an inorganic filler (C) optionally together with an elastomer (B), in specified proportions. The propylene homopolymer (A1), or the propylene homopolymer segment of the propylene block copolymer (A2) exhibits an MFR (230-C) of 20 to 300 g/10 min, a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from aC-NMR spectrum, each of 0.2% or less, and an Mw/Mn, determined by GPC, of 1 to 3.

Automotive part made of polypropylene resin composition

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Ichihara, Japan

Keita Itakura