A polysaccharide derivative having the structure Sacch-O-Z-Ar-CH = N-Y or
where Sacch-0-represents a polysaccharide molecule; where Z is
when Ar is a divalent aromatic group or -(CH2)n- when Ar is a divalent aromatic group other than a phenolic aromatic group and Y is a monovalent group derived from a water-soluble substituted or unsubstitited aromatic compound containing only one free primary amine group; where Z is
when Ar is a divalent aromatic group and Y is a monovalent group derived from a water-soluble substituted or unsubstituted aliphatic or cycloaliphatic compound containing only one primary amine group; where Z is
when Ar is a divalent aromatic group and Y is a multivalent group derived from a water-soluble protein containing more than one primary amine group; n is one or greater; and m is zero or greater, is prepared by first modifying the polysaccharide with a reagent to introduce free aromatic aldehyde groups and then reacting with a suitable amine-containing reagent. The siloxane-containing starch derivatives are useful in glass forming size compositions.
具有以下结构的
多糖衍
生物: Sacch-O-Z-Ar-CH = N-Y 或
其中 Sacch-0- 代表
多糖分子;其中 Z 是
当 Ar 为二价芳香族基团时,或当 Ar 为二价芳香族基团而非
酚类芳香族基团时,为-(
CH2)n-,且 Y 为一价基团,来源于仅含有一个游离
伯胺基团的
水溶性取代或未取代芳香族化合物; 其中 Z 为
当 Ar 是二价芳香族基团,而 Y 是衍生自仅含一个
伯胺基团的
水溶性取代或未取代脂族或环脂族 化合物的一价基团时; 其中 Z 是
当 Ar 为二价芳香族基团,Y 为多价基团,衍生自含有一个以上
伯胺基团的
水溶性蛋白质时;n 为 1 或更大;m 为 0 或更大,制备方法是首先用试剂修饰
多糖,引入游离芳香醛基团,然后与合适的含胺试剂反应。含
硅氧烷的淀粉衍
生物可用于
玻璃成型组合物。