Mitsui Chemicals, Inc.

Mitsui Chemicals Tohcello, Inc.

Sharp Kabushiki Kaisha Corporation

Mitsui Chemicals Ict Materia, Inc.

Fumito Takeuchi

Shigenobu Ikenaga

Tomoaki Ito

Keiji Watanabe

Koji Endo

Kotaro Ichino

Sadahiko Matsuura

Yuji Ishii

Yuichi Yamamura

Keisuke Shishido

Tatsuya Sakai

Kiyohide Inomata

Yuji Noguchi

Mayumi Hiwara

Kenta Ide

Kazuhiro Yarimizu

Yusuke Mizobuchi

Yasushi Mizuta

Nobuhiro Maruko

Takanobu Murofushi

Jun Tokuhiro

Masaaki Odoi

Takashi Hakuta

Hiroshi Mori

Mitsunao Arino

Takahisa Miyawaki

Tadashi Kitamura

Kengo Goto

Kei Nagata

Hirofumi Zenkoh

Kenichi Yashiro

Koutarou Asahina

Hirohiko Murase

Kaoru Ohshimizu

Hiroyuki Asakura

Ryo Nakatsuji

Kenji Itou

A cyclic olefin-based copolymer resin composition includes a cyclic olefin-based copolymer (M); and a maleimide compound (L), in which the cyclic olefin-based copolymer (M) includes a cyclic olefin-based copolymer (m) including a repeating unit represented by a specific general formula, the maleimide compound (L) has a solubility parameter (SP value) obtained by Fedors method of 19 J/cmor more and 26 J/cmor less and includes a maleimide compound (l), which is a bismaleimide compound having at least two maleimide groups in a molecule, and when a total of the cyclic olefin-based copolymer (M) and the maleimide compound (L) is 100 parts by mass, a content of the maleimide compound (L) is 1 part by mass or more and 50 parts by mass or less.

Cyclic olefin-based copolymer composition, varnish, and cross-linked product

The purpose of the present invention is to obtain an ethylene&#x22c5;&#x3b1;-olefin&#x22c5;non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene&#x22c5;&#x3b1;-olefin&#x22c5;non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an &#x3b1;-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML125&#xb0; C. is 5-100, and (4) the B value is 1.20 or more.

Ethylene &#x3b1;-olefin non-conjugated polyene copolymer, use thereof, and manufacturing method thereof

Ethylene alpha-olefin non-conjugated polyene copolymer, use thereof, and manufacturing method thereof

The purpose of the present invention is to obtain an ethylene.&#x3b1;-olefin.non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene.&#x3b1;-olefin.non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an &#x3b1;-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML125&#xb0; C. is 5-100, and (4) the B value is 1.20 or more.

The present invention is a crosslinked body obtained by crosslinking a composition which comprises 100 parts by mass of (A) an ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer having one or more peaks of tan &#x3b4; in the temperature range of &#x2212;50 to &#x2212;30&#xb0; C., the tan &#x3b4; being determined by dynamic viscoelasticity measurement, 50 to 500 parts by mass of (B) an olefin-based copolymer having one or more peaks of tan &#x3b4; in the temperature range of 0 to 40&#xb0; C., the tan &#x3b4; being determined by dynamic viscoelasticity measurement, 5 to 300 parts by mass of (C) a softener, 10 to 300 parts by mass of (D) a reinforcing filler and 0.1 to 10 parts by mass of (E) a vulcanizing agent, and which has a content ratio by mass ((C)/(D)) of (C) the softener to (D) the reinforcing filler of 0.3 to 1.5, the crosslinked body having a durometer hardness (value immediately after measurement) of 50 to 8. The crosslinked body of the present invention has high hardness and low rebound resilience compatible with each other, and from the crosslinked body, a vibration damper having high hardness and low rebound resilience compatible with each other and various products requiring vibration damping properties can be obtained.

Crosslinked body and vibration damper

An encapsulating material for solar cell of the invention contains an ethylene/&#x3b1;-olefin copolymer, and a content of a fluorine element in the ethylene/&#x3b1;-olefin copolymer, which is determined using a combustion method and an ion chromatograph method, is equal to or less than 30 ppm.

Encapsulating material for solar cell and solar cell module

The encapsulating material for solar cell is an encapsulating material for solar cell including an ethylene/&#x3b1;-olefin copolymer and an organic peroxide having a one-minute half-life temperature in a range of 100&#xb0; C. to 170&#xb0; C. In addition, the complex viscosity of the encapsulating material for solar cell has the minimum value (&#x3b7;) of the complex viscosity at a temperature in a range of 100&#xb0; C. to lower than 135&#xb0; C., the minimum value (&#x3b7;) of the complex viscosity is in a range of 6.0&#xd7;10Pa&#xb7;s to 4.0&#xd7;10Pa&#xb7;s, the complex viscosity (&#x3b7;) of the encapsulating material for solar cell at 150&#xb0; C. is in a range of 2.0&#xd7;10Pa&#xb7;s to 1.0&#xd7;10Pa&#xb7;s, and the content of the organic peroxide in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/&#x3b1;-olefin copolymer.

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 that is capable of suppressing the corrosion of metal and the occurrence of yellowing at a high temperature and has excellent long-term reliability in a constant temperature and humidity is provided. The encapsulating material for solar cell of the invention contains an ethylene/&#x3b1;-olefin copolymer, a hindered amine-based light stabilizer, a hindered phenol-based stabilizer, and a phosphorous-based stabilizer as essential components.

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.

An encapsulating material for solar cell of the invention contains an ethylene/&#x3b1;-olefin copolymer, an organic peroxide, at least one crosslinking aid selected from a group consisting of divinyl aromatic compounds, cyanurates, diallyl compounds, triallyl compounds, oximes and maleimides, and a (meth)acrylate-based monomer. The content of the (meth)acrylate-based monomer in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 5.0 parts by weight with respect to 100 parts by weight of the ethylene/&#x3b1;-olefin copolymer, and the content of the crosslinking aid in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/&#x3b1;-olefin copolymer.

An encapsulating material for solar cell is made of a resin composition containing a crosslinkable resin, and satisfies the following 1) and 2). 1) When the encapsulating material for solar cell is immersed in acetone at 23&#xb0; C. for one hour after a crosslinking treatment in which the encapsulating material for solar cell is heated and depressurized at 150&#xb0; C. and 250 Pa for three minutes, and then is heated and pressurized at 150&#xb0; C. and 100 kPa for 15 minutes, an acetone-absorbing ratio is in a range of 3.5 weight % to 12.0 weight % with respect to the weight of the above-described crosslinking-treated encapsulating material for solar cell. 2) A volume resistivity of the above-described crosslinking-treated encapsulating material for solar cell, which is based on JIS K6911 and measured at a temperature of 100&#xb0; C. with an applied voltage of 500 V, is in a range of 1.0&#xd7;10&#x3a9;&#xb7;cm to 1.0&#xd7;10&#x3a9;&#xb7;cm.

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

An ethylene resin composition is provided which has excellent properties including adhesion properties, electrically insulating properties, transparency, moldability and process stability and can be produced without requiring any cross-linking procedure if necessary to improve productivity; and others. The ethylene resin composition contains a modified product produced by modifying an ethylene polymer (A) that meets all of the requirements a) to e) mentioned below with an ethylenically unsaturated silane compound (B). a) The density is 900 to 940 kg/m. b) The melting peak temperature is 90 to 125 &#xb0; C. as determined by DSC. c) The melt flow rate (MFR2) is 0.1 to 100 g/10 minutes as measured at 190 &#xb0; C. and a load of 2.16 kg in accordance with JIS K-6721. d) The Mw/Mn ratio is 1.2 to 3.5. e) The content of metal residues is 0.1 to 50 ppm.

Ethylene resin composition, sealing material for solar cell, and solar cell module utilizing the sealing material

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.

Growing community of inventors

Chiba, Japan

Fumito Takeuchi