Poly alpha-1,6-glucan derivatives and compositions comprising same

A composition comprising a poly alpha-1,6-glucan derivative that comprises:

• (i) poly alpha-1,6-glucan substituted with at least one organic group linked to the poly alpha-1,6-glucan through a linkage moiety selected from —O—, —OSO2—, —OCOO—, or —OCONH—/—OCO—;
• (ii) a weight-average degree of polymerization of about 5 to about 4000;
• and
• iii) a degree of substitution of about 0.001 to about 3.0;
• wherein the poly alpha-1,6-glucan comprises a backbone of glucose monomer units, wherein greater than or equal to 90% of the backbone glucose monomer units are linked via alpha-1,6 glycosidic linkages, at least about 5% of the backbone glucose monomer units have branches via alpha-1,2 glycosidic linkages, less than 1% of the glycosidic linkages of the poly alpha-1,6-glucan are alpha-1,3 glycosidic linkages,
• and wherein the poly alpha-1,6-glucan is not substituted with a hydrophilic group.