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2 177 487

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Application

2000117088/04, 2000-07-03

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Start date

2000-07-03

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Actual filing date

2000-07-03

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Published

2001-12-27

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Inventor

Lifshits Eh.B.Podlesnykh V.N.Ushomirskij M.N.Formina L.V.Fadeev A.A.

(73)

Holder

Zakrytoe Aktsionernoe Obshchestvo Nauchno-Proizvodstvennoe Ob"Edinenie

3,3'-DI-γ-SULFOALKYLTHIACARBOCYANIMINE BETAINE SALTS AS SPECTRAL SENSITIZERS AND METHOD OF SPECTRAL SENSITIZATION OF HALOGEN-SILVER PHOTOGRAPHIC EMULSIONS AND USE THEREOF Russian patent published in 2001 - IPC

Abstract RU 2177487 C1

FIELD: chemical industry. SUBSTANCE: described are new 3,3'-di-γ-sulfoalkylthiacarbocyanine betaine salts (I) wherein A is lower alkyl, R is 0-AIK -γ- is halogen, R1 is 3.3'-diethylthiazoline carbocyanine, 3.3'- diethyloxacarbocyanine, or 1.1'-diethyl-quino-2,2-monomethinecyanine as spectral sensitizer of halogen-silver photographic emulsions, and method of spectral sensitization of halogen-silver emulsions and use thereof. Compounds (I) make it possible to attain higher level of light sensitivity of photolayers especially behind filter OC-H after chemical photographic treatment. EFFECT: improved properties of the salts. 3 cl, 27 ex, 3 tbl

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RU 2 177 487 C1

Authors

Lifshits Eh.B.

Podlesnykh V.N.

Ushomirskij M.N.

Formina L.V.

Fadeev A.A.

Dates

2001-12-27—Published

2000-07-03—Filed

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