To provide an aqueous composition of a graft modified starch obtained by a series of processes of gelatinization, addition reaction and graft reaction of a starch without the need of refinement, the aqueous composition obtaining a colorless film with a preferable viscosity stability in an aqueous solution state and a high water resistance even if a composition derived from a starch is included by a large amount.
The aqueous composition of a graft modified starch with the crystallinity derived from the starch remaining is obtained by cutting the starch chain by dropping a monomer-emulsified product made of one or more ethylenically unsaturated monomers and an oxidizing agent in the presence of a starch with its α (gelatinization) degree controlled, and carrying out graft polymerization reaction of the ethylenically unsaturated monomer to the starch at the same time.
SHIMAZAKI SHIN
DOI MITSURU
| JP2010059330A | 2010-03-18 | |||
| JPS5590518A | 1980-07-09 | |||
| JP2003040945A | 2003-02-13 | |||
| JPH10259590A | 1998-09-29 | |||
| JPH04356513A | 1992-12-10 |