Stilbene optical brighteners and compositions brightened therewi

Details Stilbene optical brighteners and compositions brightened therewi Stilbene optical brighteners and compositions brightened therewi

1975-04-30

1976-11-23

Demers, Arthur P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260329R, 2603305, 2603462R, 260566B, 260570R, 260591, 260600R, 260609R, 106 22, 162162, 25230122, 2523012Y, 260 75T, 260240CA, 260243R, 2602477T, 260269TR, 26029355, 2603191, 2603267, C07D20904, C07D33352

Patent

active

039936457

ABSTRACT:
Benzofurans, benzothiophenes, indoles, naphthofurans and benzofuranobenzofurans which are substituted by 4-vinylphenyl groups wherein the 2-position of the vinyl is substituted by a monovalent aromatic radical having one to three aromatic rings are optical brightening agents useful for whitening and brightening natural and synthetic fibers, papers, resins and the like. The compounds are conveniently prepared by interacting benzofurans, benzothiophenes, indoles, naphthofurans or benzofuranobenzofurans which are substituted by a p-tolyl group, with an aromatic aldehyde or preferably the anil derivative thereof.

REFERENCES:
patent: 3697513 (1972-10-01), Siegrist
patent: 3732221 (1973-05-01), Siegrist

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