ALKENYL- ODER ALKYLBERNSTEINSAEUREESTER ENTHALTENDE WASSERLOESLICHE CELLULOSEETHER.
摘要
New water-soluble cellulose ether derivs. (I) are mfd. by reaction of 100 pts.wt. of a water-soluble cellulose ether (II) with 3-30 (pref. 5-25) pts.wt. 8-18C (pref. 10-14C) alk(en)ylsuccinic anhydride (III), in the absence of water and of alkali, at elevated temp., under conditions such that 1-8 wt.% of (III) (w.r.t. (II) reacts with (II). Reaction is carried out at 40-150 (pref. 60-110) deg.C for 0.5-12 (pref. 2-6) hrs; pref. 3-6 wt.% of (III) reacts with (II). (I) are mfd. e.g. by dissolving (III) in an aprotic solvent and spraying onto solid (II), with agitation.