摘要:
A biodegradable, swellable starch ester, containing more than 50% by weight of water-insoluble components and having a retention capacity of >500% for 0.9% (by weight) aqueous NaCl solution, and methods of its production and use.
摘要:
The aging of swellable starch maleates is reduced by reacting with one or more singly and/or multiply functional nucleophiles as in a Michael condensation reaction. Mixtures of mercaptoethanol and 1,2-bis-(2-mercaptoethoxy)-ethane or mixtures of sodium bisulfite and pentaerythrite-tetrakis-(2-mercaptoacetate) are preferred. The decrease of the retention capacity [SRV] in the reaction products after 100 days is preferably