Mitsui Chemicals Tohcello, Inc.

Mitsui Chemicals, Inc.

Mitsui Chemicals Ict Materia, Inc.

Keiji Watanabe

Shigenobu Ikenaga

Fumito Takeuchi

Tomoaki Ito

Masaaki Kawasaki

Terunori Fujita

Keiji Okada

Nobuhiro Maruko

Masaaki Yasuda

Kazuyuki Takimoto

Hidetatsu Murakami

Kazuhiro Yarimizu

Ken Maeda

Takanobu Murofushi

Jun Tokuhiro

Makoto Kamimura

An encapsulating material for solar cell containing an ethylene/&#x3b1;-olefin copolymer satisfying the following a1) and a2), and a specific peroxyketal having a 1-hour half-life temperature in a range of 100 to 135 degrees centigrade; the peroxyketal being contained in an amount of 0.1 to less than 0.8 weight parts relative to 100 weight parts of the ethylene/&#x3b1;-olefin copolymer.

Solar cell sealing material, method for manufacturing solar cell sealing material, and solar cell module

An encapsulating material for solar cell excellent in a balance among properties including transparency, flexibility, adhesiveness, heat resistance, appearance, crosslinking properties, electrical properties and calender moldability. The encapsulating material includes an ethylene/&#x3b1;-olefin copolymer satisfying the following requirements: (a1) the content ratio of structural units derived from ethylene is from 80 to 90 mol % and the content ratio of structural units derived from &#x3b1;-olefin having 3 to 20 carbon atoms is from 10 to 20 mol %; (a2) MFR is equal to or more than 2 g/10 minutes and less than 10 g/10 minutes as measured under the conditions of a temperature of 190 degrees centigrade and a load of 2.16 kg in accordance with ASTM D1238; (a3) the density is from 0.865 to 0.884 g/cmas measured in accordance with ASTM D1505; and (a4) the shore A hardness is from 60 to 85 as measured in accordance with ASTM D2240.

Encapsulating material for solar cell and solar cell module

A solar-cell sealant that has excellent properties such as transparency, flexibility, adhesiveness, heat resistance, appearance, cross-linking characteristics, electrical characteristics, and calenderability. A solar-cell sealant that contains an ethylene/&#x3b1;-olefin/unconjugated-polyene copolymer satisfying requirements (a1) through (a3). Requirement (a1) is that constituent units derived from ethylene constitute 80-90 mol %, constituent units derived from C3-20 &#x3b1;-olefin constitute 9.99-19.99 mol %, and constituent units derived from an unconjugated polyene constitute 0.01-5.0 mol % of said copolymer. Requirement (a2) is that the MFR of said copolymer, as measured in accordance with ASTM D1238 at 190&#xb0; C. under a 2.16 kg load, be at least 2 g/10 min. and less than 10 g/10 min. Requirement (a3) is that the Shore A hardness of said copolymer, as measured in accordance with ASTM D2240, be 60 to 85.

Solar-cell sealant and solar-cell module using same

Disclosed is an encapsulating material for solar cell containing an ethylene/&#x3b1;-olefin copolymer satisfying the following requirements (a1) to (a4): (a1) the content ratio of structural units derived from ethylene is from 80 to 90 mol % and the content ratio of structural units derived from &#x3b1;-olefin having 3 to 20 carbon atoms is from 10 to 20 mol %; (a2) MFR is from 10 to 50 g/10 minutes as measured under the conditions of a temperature of 190 degrees centigrade and a load of 2.16 kg in accordance with ASTM D1238; (a3) the density is from 0.865 to 0.884 g/cmas measured in accordance with ASTM D1505; and (a4) the shore A hardness is from 60 to 85 as measured in accordance with ASTM D2240.

A novel and useful linear triene compound represented by the following formula (1) is co-polymerized with an &agr;-olefin to obtain an ethylenically unsaturated copolymer which is superior in weather-ability, heat resitance and fastness to ozone, together with superior scorch stability and vulcanizability at high velocity

Linear triene compound and copolymer

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Ichihara, Japan

Keiji Watanabe