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Method of producing dyed polysaccharide:amino or imino starch derivative with reactive dye
| Details |
Inventors: Shinoki, Hiroshi; Ono, Mitsunori;
Assignee: Fuji Photo Film Co. Ltd. (Kanagawa, JP)
Primary Examiner: Clingman; A. Lionel
Assistant Examiner:
Attorney, Agent or Firm: McAulay Fisher Nissen & Goldberg
A method of producing a dyed polysaccharide which comprises linking a dye, capable of linking to amino group or imino group, to a starch derivative having a glucose derivative unit shown in a general formula [I] as a partial structure of the starch derivative. ##STR1## In the formula [I], R represents an arylene group or an alkylene group, R.sub.1, represents hydrogen atom or an alkyl group, and X and Y represent linking portions to other portions of the starch molecule, respectively. According to the method of the invention, dyed polysaccharides can readily be obtained by using a commercial reactive dye at room temperature under neutral conditions. |
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DETAILED DESCRIPTION OF THE INVENTION In the general formula [I], the arylene group of R includes phenylene group, naphthylene group, substituted phenylene groups and substituted naphthylene groups.
The substituents for phenylene or naphthylene group are linear or branched alkyl groups having a number of carbon atoms of 1 to about 10 such as methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, octyl group and decyl group, linear or branched alkoxy groups having a number of carbon atoms of 1 to about 10 such as methoxy group, ethoxy group, propoxy group and butoxy group, --SO.
sub.
3 M' and --COOM' (M' represents an alkali metal ion such as sodium ion, potassium ion and lithium ion.
), and the like.
The number of the substituents is 1 to 3, and in the case of having 2 or 3 substituents, they may be identical with or different from each other.
The alkylene group of R may be linear or branched, and the number of carbon atoms is 2 to about 10, such as ethylene group, propylene group, butylene group, pehtylene group, hexylene group and octylene group.
The alkylene group may have substituents, such as hydroxyl group, --SO.
sub.
3 M' and --COOM' (M' represents an alkali metal ion such as sodium ion, potassium ion and lithium ion).
The number of the substituents is 1 to 3, and in the case of having 2 or 3 substituents, they may be identical with or different from each other.
R.
sub.
1 is hydrogen atom or an alkyl group.
The alkyl group may be linear or branched, and the number of carbon atoms is 1 to 5.
Such an alkyl group includes methyl group, ethyl group, butyl group and isobutyl group.
X and Y represent the linking portions to a position, such as 1-position or 4-position, of other monosaccharide units of the starch molecule.
Preferable starch derivatives for the method of the invention include; ##STR3## The content of the glucose derivative represented by the general formula [1]in the starch derivative is usually 1 to 10% of the total glucose unit, and it is preferably 3 to 5%
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