Toyo Tire Rubber Co., Ltd.

Aya Ito

Takeshi Fukuda

Masato Doura

Zhiwei Luo

Hiroyuki Anzai

The present invention provides a polymeric actuator which has excellent flexibility and elongation rate; low temperature dependability of physical properties such as an elastic modulus and high dielectric breakdown strength, and which can drive in a low electric field. The present invention relates to a polymeric actuator, wherein the polymeric dielectric has a storage elastic modulus at 20&#xb0; C. [E'(20&#xb0; C.)] determined by a dynamic viscoelastic measurement at a frequency of 1 Hz of not more than 0.5 MPa,

Polymeric actuator

A polishing pad, having a polishing layer comprising a thermoset polyurethane foam, wherein the polishing layer has an in-plane variation of 12 or less in microrubber A hardness, the variation being obtained by measuring the polishing layer from a polishing surface side of the layer, the thermoset polyurethane foam contains, as raw material components, an isocyanate component and active-hydrogen-containing compounds, and the active-hydrogen-containing compounds comprise a trifunctional polyol having at least one terminated hydroxyl group that is a secondary hydroxyl group, and having a hydroxyl group value of 150 to 1,000 mg KOH/g in an amount of 10 to 50 parts by weight for 100 parts by weight of the active-hydrogen-containing compounds.

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Osaka, Japan

Aya Ito