Process for the preparation of fluorescent brightener formulatio

Details Process for the preparation of fluorescent brightener formulatio Process for the preparation of fluorescent brightener formulatio

1982-09-13

1984-08-21

Demers, Arthur P.

Compositions

Organic luminescent material containing compositions

Optical brightening compositions

25230121, 25230122, 25230125, 25230126, 25230127, 25230128, 25230132, C09K 1106

Patent

active

044669003

ABSTRACT:
A process is described for the preparation of concentrated liquid formulations, stable on storage, of anionic fluorescent brighteners, which process consists in passing a crude (for example obtained from synthesis) aqueous solution or dispersion of a fluorescent brightener containing sulfo groups, in particular a stilbene fluorescent brightener belonging to the group comprising bistriazinylaminostilbenedisulfonic acids, bis-styrylbiphenyls, bis-styrylbenzenes and bis-triazolylstilbenedisulfonic acids, is passed through a semipermeable membrane which contains ionic groups and has a pore diameter of 1-500 .ANG. in order to remove salts and by-products from the synthesis having molecular weights below 500 and in order to remove part of the water. The resulting concentrated preparation can, if desired, be concentrated further and/or treated with formulation assistants and, if desired, further additives.

REFERENCES:
patent: 4247401 (1981-01-01), Bloch et al.

Affiliated with

Also associated with

Rating

Process for the preparation of fluorescent brightener formulatio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of fluorescent brightener formulatio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of fluorescent brightener formulatio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1937046