Cationized hydroxyalkylcellulose and process for producing the same

Abstract

Cationized hydroxyalkylcelluloses, which are highly compatible with surfactants, are represented by the following formula (I): wherein R 1 , R 2 and R 3 represent a hydrogen atom or a group represented by the formula CH 2 CH 2 OCH 2 CH (OH) CH 2 N + (CH 3 )Cl − , etc.; and “n” is a number of from 50 to 2,000; which have a mobility distribution (ΔU) determined by electrophoresis ranging from 0.1×10 5 10 −5 to 2.0×10 5 10 −5 cm 2 sec·V.

What is claimed is:  
     
       1. A cationized hydroxyalkylcellulose having a glucose unit represented by the following formula (I):                    
       wherein R 1 , R 2  and R 3  represent each hydrogen atom, a group represented by the following formula (II):                    
       wherein R 4  represents hydrogen atom or methyl; and “a” is a number of from 1 to 6 on the average, or a group represented by the following formula (III):                    
       wherein R 4  represents hydrogen atom or methyl; “a” is a number of from 1 to 6 on the average; R 5 R 6  and R 7  are the same as or different from each other and represent a methyl or ethyl; and X represents a halogen; and “n” is a number of from 50 to 2,000, the cationized hydroxyalkyl cellulose having a mobility distribution (ΔU), determined by electrophoresis, in the range of from 0.1×10 5   10   −5  to 2.0×10 5   10   −5  cm 2 /sec·V, including the above shown group (III) to have a nitrogen atom content (%) of from 0.1 to 10.0. 
     
     
       2. The cationized hydroxyalkylcellulose as set forth in  claim 1 , which has the substituent represented by the formula (II) at an average degree of substitution per glucose unit ranging from 0.4 to 2.9 and at an average mole number ranging from 1.0 to 7.0. 
     
     
       3. The cationized hydroxyalkylcellulose as set forth in  claim 1 , which has the substituent represented by the formula (II) at an average degree of substitution per glucose unit ranging from 0.7 to 2.1 and at an average mole number ranging from 1.6 to 3.6. 
     
     
       4. The cationized hydroxyalkylcellulose as set forth in  claim 1 , which has the substituent represented by the formula (III) at an average degree of substitution per glucose unit ranging from 0.1 to 3.0. 
     
     
       5. The cationized hydroxyalkylcellulose as, set forth in  claim 1 , which has the substituent represented by the formula (III) at an average degree of substitution per glucose unit ranging from 0.1 to 1.5. 
     
     
       6. The cationized hydroxyalkylcellulose as set forth in  claim 1 , which has the substituent represented by the formula (III) at an average degree of substitution per glucose unit ranging from 0.1 to 0.9. 
     
     
       7. A process for producing a cationized hydroxyalkylcellulose, comprising by the steps of mixing a hydroxyalkylcellulose with an aqueous solution of isopropyl alcohol having an isopropyl alcohol concentration of from 80 to 90 wt. % or an aqueous solution of t-butyl alcohol having a t-butyl alcohol concentration of from 75 to 85 wt. %; adding an alkali to the mixture; effecting cationization; and effecting: neutralization