Novel crystalline forms of optical brighteners

Details Novel crystalline forms of optical brighteners Novel crystalline forms of optical brighteners

1969-06-18

1976-04-20

Randolph, John D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252 98, 252543, 25230123, C07D25154

Patent

active

039519600

ABSTRACT:
Novel crystalline needle forms of the fluorescent compounds disodium 4,4'-bis(4-anilino-6-morpholino-s-triazin-2-ylamino)-2,2'-stilbenedisulfon ate and disodium 4,4'-bis(4,6-dianilino-s-triazin-2-ylamino)-2,2'-stilbenedisulfonate, useful as optical brightening agents, particularly when incorporated into detergent compositions. The novel crystalline forms are prepared by heating the compound in an aqueous alkaline medium containing excess amine reactant.

REFERENCES:
patent: 2612501 (1952-09-01), Wilson
patent: 2945762 (1960-09-01), Carroll et al.
patent: 3472842 (1969-10-01), Hausermann et al.
patent: 3511833 (1967-10-01), Tscharner
patent: 3630944 (1971-10-01), Ohkawa et al.
patent: 3657231 (1972-04-01), Booth
Hausermann et al., Textil-Rundschau, Vol. 16, pp. 176 to 180, (1961).
Noguchi, Yuki Gosei Kagaku Kyokai Sshi, Vol. 19, pp. 920 to 930, (1961), (not available, but relied upon as abstracted in Chemical Abstracts infra pending obtention of original article).
Chemical Abstracts, Vol. 56, Col. 7467, (1952), (abst. of Noguchi).
Chemical Abstracts, Vol. 56, subject index p. 2129 s, (1962).

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