Global Patent Index - EP 0238446 B1

EP 0238446 B1 19951115 - Mixtures of optical brighteners.

Title (en)

Mixtures of optical brighteners.

Title (de)

Mischungen von optischen Aufhellern.

Title (fr)

Mélanges d'agents de blanchiment optique.

Publication

EP 0238446 B1 19951115 (DE)

Application

EP 87810151 A 19870316

Priority

CH 114286 A 19860321

Abstract (en)

[origin: US4778622A] Mixtures of fluorescent whitening agents consisting of 51 to 99% by weight of a symmetrically or unsymmetrically substituted first 1,4-bis(cyanostyryl)benzene and 49 to 1% by weight of an unsymmetrically substituted second 1,4-bis(cyanostyryl)benzene that differs from the first, a process for the preparation of said mixtures by condensing terephthalaldehyde with a di(C1-C4) alkylphosphonomethylbenzonitrile to cyano-4-formylstilbene, which is further condensed, either direct or after isolation, with at least one other di(C1-C4)alkylphosphonomethylbenzonitrile, the use of these mixtures for whitening polyester fibres, and compositions containing said mixtures for whitening polyester fibres.

IPC 1-7

D06L 3/12

IPC 8 full level

C09B 67/42 (2006.01); C09B 67/22 (2006.01); D06L 3/12 (2006.01); D06L 4/65 (2017.01)

CPC (source: EP US)

D06L 4/65 (2016.12 - EP US)

Designated contracting state (EPC)

BE CH DE FR GB IT LI NL

DOCDB simple family (publication)

EP 0238446 A1 19870923; EP 0238446 B1 19951115; BR 8701260 A 19880105; CA 1340088 C 19981020; DE 3751594 D1 19951221; JP 2578108 B2 19970205; JP S62232464 A 19871012; MX 168413 B 19930524; US 4778622 A 19881018; US 4891153 A 19900102

DOCDB simple family (application)

EP 87810151 A 19870316; BR 8701260 A 19870320; CA 532408 A 19870319; DE 3751594 T 19870316; JP 6445387 A 19870320; MX 563187 A 19870319; US 22864388 A 19880805; US 2502387 A 19870312