Claims
- 1. A cationized hydroxyalkylcellulose having a glucose unit represented by the following formula (I): wherein R1, R2 and R3 represent each hydrogen atom, a group represented by the following formula (II): wherein R4 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 R4 represents hydrogen atom or methyl; “a” is a number of from 1 to 6 on the average; R5R6 and R7 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 0.1×10510−5 to 2.0×10510−5 cm2/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
Priority Claims (1)
Number |
Date |
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Kind |
10-191404 |
Jul 1998 |
JP |
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Parent Case Info
This application is a reissue application of U.S. Ser. No. 09/246247, filed Feb. 8, 1999, now U.S. Pat. No. 6,197,950, issued on Mar. 6, 2001.
Foreign Referenced Citations (6)
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Date |
Country |
0 189 935 |
Jan 1986 |
EP |
45-20318 |
Jul 1970 |
JP |
53-090368 |
Aug 1978 |
JP |
59-42681 |
Oct 1984 |
JP |
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Divisions (1)
|
Number |
Date |
Country |
Parent |
09/246247 |
Feb 1999 |
US |
Child |
10/120341 |
|
US |
Reissues (1)
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Number |
Date |
Country |
Parent |
09/246247 |
Feb 1999 |
US |
Child |
10/120341 |
|
US |