Abstract:
Optical brighteners are prepared from 0.98-0.50 parts of a mixture prepared from 0.05-0.95 parts of compd. (I) and 0.95-0.05 parts of compd.(II), and 0.02-0.50 parts of compd. (III), where R1 = H or C1-C4 alkyl; R2 = H or C1-C4 alkyl in 6- or 7-position; A = -CN, - COOH, -COOCH3, -C6H5, or a nitrogen ring compd. containing R4 gp.; R4 = C1-C4 alkyl or β-hydroxy ethyl; and R3 = H or C1-C4 alkyl.
Abstract:
A whitening and brightening agent contg. 0.05-0.95 part I(X = O, S; R1 and R2 are H, F, Cl, Ph, C1-9 alkyl, etc-; A = cyano, -COOR3, -CONR3; R3 = H, alkenyl, C1-18 alkyl, etc.) and 0.95-0.05 part II or III was obtained. For example, polyester fabric impregnated with a soln. contg. 0.6 g/ I and 0.2 g/ II, squeezed, dried 20 sec at 120oC, and thermosoled 30 sec at 190oC had whiteness degress 162(Berger) and 158(Stensby).
Abstract:
1,2,3-Triazoles are obtained by reacting an alkenyl sulfine with a salt of hydrazoic acid. The products are fluorescent agents and useful as UV-absorbers, scintillators or optical brighteners or starting materials for such materials.
Abstract:
A mixture of optical brighteners containing 0.05 to 0.95 part by weight of a compound from the benzoxazolyl- or benzothiazolylstilbene series and 0.95 to 0.05 part by weight of a compound of the bis-benzoxazolyl- or bis-benzothiazolylstilbene series or of the benzoxazolyl- or benzothiazolyl-stilbene oxazolo[5,4-6]pyridinyl or oxazolo[2,3-b]pyridinyl series. These mixtures show an enhanced degree of whiteness as compared to the same amount of the single components.
Abstract:
Mixtures of optical brighteners containing 0.05 to 1% of a 4-benzoxazolystilbene derivative and 1 to 0.05% of a 1,4-bis-benzoxazolyl- or bis-benzthiazolyl-naphthalene derivative. These mixtures show a higher degree of whiteness than an equal amount of only one of the two components.