Matsushita Electric Industrial Co., Ltd.

Sumitomo Chemical Company, Limited

Kouziro Matsuo

Minoru Yoshinaka

Jun Yagi

Yasushi Okamoto

Masashi Yamamoto

Hiroyuki Harada

Kenichi Ohkawa

Mitsumasa Oku

Eizo Asakura

Yoshinori Kanno

Hidenosuke Nakamura

A radio wave absorbing material comprising zinc oxide whiskers. In a preferred embodiment, the zinc oxide whiskers are comprised of a central part and needle crystal projections extending from said central part in plural different axial directions.

Radio wave absorbing material

Disclosed is a polypropylene resin composition which is superior in mechanical strength and affords molded articles having good appearance which comprises (A) a crystalline polypropylene, (B) a polypropylene modified with an unsaturated carboxylic acid or an acid anhydride thereof, and (C) a zinc oxide whiskers. When the composition additionally contains an inorganic filler such as glass fibers, molded articles further improved in appearance can be obtained. The zinc oxide whiskers preferably have a tetrapod type crystal structure.

Polypropylene resin composition

Disclosed is a rubber modified styrene resin composition which comprises 50-98% by weight of a rubber modified styrene resin and 50-2% by weight of zinc oxide whiskers. This composition can provide molded articles excellent in mechanical strength, surface state and vibration damping characteristics. Impact strength can be further improved by adding to the above composition a rubber-like material. The zinc oxide whiskers preferably have a tetrapod-formed crystal structure and furthermore, is preferably surface treated with a coupling agent such as silane compound.

Rubber modified styrene resin composition

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Yamatokoriyama, Japan

Kouziro Matsuo