Method for producing liquid composition

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United States of America Patent

PATENT NO 11046886
APP PUB NO 20200199444A1
SERIAL NO

16631065

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Abstract

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A method for producing a liquid composition formed of a phosphorescent material and an organic solvent includes the steps of: dissolving a phosphorescent material in an organic solvent to prepare a mixed liquid, and filtering the mixed liquid by a filtering device. The filtering device is a housing or holder, a fluororesin membrane filter, and a filter support member. A material of a portion of the housing and holder in contact with the mixed liquid is a metal or a mixture of metal and at least one of glass, fluororesins, polyethylene not containing a phosphorus antioxidant, and polyethylene not containing an oxidized phosphorus antioxidant. A material of a portion of the filter support member in contact with the mixed liquid is at least one of metals, glass, fluororesins, polyethylene not containing a phosphorus antioxidant, and polyethylene not containing an oxidized phosphorus antioxidant.

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Patent Owner(s)

  • SUMITOMO CHEMICAL COMPANY, LIMITED

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Iwata, Nobuchika Toyonaka, JP 2 9
Kakimoto, Hidenobu Osaka, JP 27 104
Miyamoto, Hisaaki Osaka, JP 5 12
Ueoka, Takahiro Tsukuba, JP 17 209
Yoshida, Sadamu Tokyo, JP 3 4

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