Mitsui Chemicals, Inc.

The Lubrizol Corporation

Nozomi Kamiya

Satoshi Ikeda

Hiroshi Hoya

Kiminori Noda

Takayuki Kuroki

Chor Huang

Tatsuya Sakai

Hiroto Yasui

Jumpei Tanaka

Kan Komiya

An object of the present invention is to provide a composition capable of allowing for production of a crosslinked foamed product suitable for applications of footwear parts such as soles and excellent in properties such as lightweight properties, heat shrinkability, compression set and mechanical strength in a well-balanced manner, a foamed product using the composition and a footwear part using the same. An ethylene copolymer composition including an ethylene copolymer (A) satisfying all the following requirements (A-a), (A-b), (A-c) and (A-d), ethylene/α-olefin having 3 to 20 carbon atoms/non-conjugated polyene copolymer rubber (B), and, if necessary, an ethylene/polar monomer copolymer (C); (A-a) a vinyl group content per 1,000 carbon atoms is 0.025 to 0.3, (A-b) MFR/MFRis 7 to 20, (A-c) a density is 0.850 to 0.910 g/cm, and (A-d) a melt flow rate is 0.01 to 200 g/10 min.

Ethylene copolymer composition and use thereof

A vibration damper of the invention is formed from a polymer composition including (a) 100 parts by weight of a block copolymer including a polymer segment mainly derived from a vinyl aromatic compound and a polymer segment mainly derived from a conjugated diene compound, or a hydrogenated product of the copolymer, (b) 30 to 200 parts by weight of an ethylene.&#x3b1;-olefin copolymer having a kinematic viscosity at 100&#xb0; C. of 300 to 5000 mm/s and an ethylene structural unit content of 30 to 80 mol %, and (c) 0 to 100 parts by weight of a polyolefin resin having a MFR of 0.1 to 500 g/10 min. According to the present invention, vibration dampers are provided which exhibit excellent vibration damping properties and transparency and show excellent weather resistance with little discoloration, and polymer compositions are provided which are suited for the production of vibration dampers having excellent vibration damping properties and weather resistance.

Vibration damper and polymer composition

It is an object to provide a lubricating oil composition having low-temperature properties and fuel efficiency at high temperatures which are superior to those of conventional lubricating oil compositions, and to provide a viscosity modifier for lubricating oils and an additive composition for lubricating oils which are used for obtaining said composition. The viscosity modifier for lubricating oils of the present invention comprises a propylene copolymer (A) which has a density of 875 kg/m3 or less and which comprises 60 mole % or more of structural unit derived from propylene.

Viscosity modifier for lubricating oils, additive composition for lubricating oils, and lubricating oil composition

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Ichihara, Japan

Nozomi Kamiya