Reference

Fluorescent whitener mixtures and their use

Fluorescent whitener mixtures and their use. Guenther, Dieter; Schinzel, Erich; Erckel, Ruediger; Roesch, Guenter (Hoechst A.-G., Ger.). Ger. Offen. DE 2629703 12 Jan 1978, 13 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: D06L003-12. APPLICATION: DE 76-2629703 2 Jul 1976. DOCUMENT TYPE: Patent CA Section: 39 (Textiles) A synergistic whitening effect on textiles is obsd. when 0.1-1 part I is mixed with 1-0.1 part II, where R and R1 in both structures represent H, halogen, alkyl, alkoxy, amino, CN, CO2H, or modified CO2H, or RR1 is an alkylene or OCH2O group, and R2 is H, CN, CO2H, modified CO2H, or 3-alkyl-1,2,4-oxadiazol-5-yl. 65963-54-4 which is the cas registry number of some chemical is mentioned. Thus, a polyester-cotton fabric impregnated with a soln. contg. (per L) 0.01 g I (R = R1 = H, R2 = CO2Me) (III) [65963-54-4] and 0.04 g II (R = R1 = H) [5089-22-5], dried, and heated 30 s at 190° had degree of whiteness 139 (Berger, Stensby), compared with 126 (Berger) and 130 (Stensby) when 0.05 g III was used alone. .

Highly pure benzoxazole fluorescent whiteners for polyester fibers

Highly pure benzoxazole fluorescent whiteners for polyester fibers. Noll, Bernd; Keil, Siegfried; Kippig, Wolfgang; Krausse, Herbert (VEB Chemiekombinat Bitterfeld, Ger. Dem. Rep.). Ger. (East) DD 205902 A1 11 Jan 1984, 9 pp. (German). (German Democratic Republic). CODEN: GEXXA8. CLASS: IC: C07D413-02; C07D407-14. APPLICATION: DD 82-239629 6 May 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Bisbenzoxyazolyl fluorescent whiteners (I; R = H, nonarom. C1-6 hydrocarbyl groups; Z = CH2CH2, phenylene, naphthylene, furandiyl, stilbenediyl, thiophenediyl), prepd. by reaction of o-hydroxyarylamines with Z(CO2H)2 in high-boiling halogenated arom. hydrocarbon solvents, are obtained in highly pure solid form by treating a soln. of the whitener in a steam-distillable arom. hydrocarbon with dil. aq. alkali in the presence of a dispersing agent and removing the solvent by steam distn. For example, 40 g 1,4-bis(benzoxazolyl)naphthalene (II) [5089-22-5] was dissolved in 500 g PhCl at the boil, cooled to 80°, treated with 300 mL 10% NaOH and 0.5 g dispersant (alkylphenol-ethylene oxide adduct), and steam distd. to remove PhCl. Filtration of the distn. residue followed by washing with H2O gave 38.7 g (96.7%) II, m, 211.5-212.5°.