Cationized hydroxyalkylcellulose and process for producing the same
AssigneeDaicel Chemical Industries, Ltd.
InventorsHiroyuki Nakamura, Shigenobu Sato
Life of this patent
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Abstract
Cationized hydroxyalkylcelluloses, which are highly compatible with surfactants, are represented by the following formula (I): wherein R1, R2 and R3 represent a hydrogen atom or a group represented by the formula CH2CH2OCH2CH (OH) CH2N+(CH3)Cl−, etc.; and “n” is a number of from 50 to 2,000; which have a mobility distribution (ΔU) determined by electrophoresis ranging from 0.1×105 10−5 to 2.0×105 10−5 cm2sec·V.
Claims7
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 0.1×105 10−5 to 2.0×105 10−5 cm2/sec·V, including the above shown group (III) to have a nitrogen atom content (%) of from 0.1 to 10.0.
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
Dependencies are inferred from the claim text.