abstract |
Stabilised aq. solns. of stilbene sulphonate optical brighteners (A) contng. a gp. of formula (I): contain, (based on the wt. of (A)), 1-50 (pref. 2-25) pts. wt. polyvinyl pyrrolidone, (II), pref. having av. mol. wt. 3000-100000, pref. 5000-25000. |