| http://www.w3.org/ns/prov#value | - That is, the modification can be executed by reacting an aliphatic ester-amide copolymer, an alcohol such as methanol, ethanol and isopropanol, and an excess of formaldehyde at a high temperature in the presence of an acid catalyst such as phosphoric acid; and by adding a formaldehyde or paraformaldhyde solution in methanol to the aliphatic ester-amide copolymer solution in formic acid or the like
|
