POLYVINYL ACETAL FILM AND USES THEREOF

WIPO Patent Application WO/2011/125791

A1

Provided is a polyvinyl acetal film which, when used as an interlayer for a laminated glass, can provide a laminated glass that exhibits a low degree of yellowness and excellent surface appearance, and which is thus useful as a sealing material or interlayer that can prolong the life of a laminated glass provided with either a solar cell or a functional unit. Further, the content of corrosion-causing substance in the polyvinyl acetal film is very low, so that the polyvinyl acetal film permits high-temperature lamination and thus ensures excellent productivity. Also provided are a solar cell module and a laminated glass which are made using the polyvinyl acetal film. A plasticized polyvinyl acetal film which comprises 100 parts by mass of a polyvinyl acetal resin and 15 to 60 parts by mass of a plasticizer that has a total number of molecule-constituting carbon and oxygen atoms of 28 or more and which has an acid value of 5.0meq/kg or less.

ISOUE Koichiro (7471, Tamashimaotoshima, Kurashiki-sh, Okayama 50, 〒7138550, JP)
磯上宏一郎 (〒50 岡山県倉敷市玉島乙島７４７１番地　株式会社クラレ内 Okayama, 〒7138550, JP)

JP2011/058117

October 13, 2011

March 30, 2011

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KURARAY CO., LTD. (1621, Sakazu Kurashiki-sh, Okayama 01, 〒7100801, JP)
株式会社クラレ (〒01 岡山県倉敷市酒津１６２１番地 Okayama, 〒7100801, JP)
ISOUE Koichiro (7471, Tamashimaotoshima, Kurashiki-sh, Okayama 50, 〒7138550, JP)

C08J5/18; B32B17/10; C03C27/12; C08K5/10; C08L29/14; H01L31/042

TAMURA Ryosuke (Jihokanda Building 2F, 38-6 Kanda Jinbocho 1-chome, Chiyoda-k, Tokyo 51, 〒1010051, JP)

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