Production method for cationic hydroxypropyl cellulose

摘要

The present invention relates to a process for producing a cationic hydroxypropyl cellulose including the step of reacting a low-crystalline powdery cellulose with a cationizing agent represented by the following general formula (1) and/or a cationizing agent represented by the following general formula (2), and propylene oxide in the presence of water in an amount of from 10 to 60% by mass on the basis of the low-crystalline powdery cellulose, and a catalyst:;
wherein R1 to R3 are each independently a linear or branched hydrocarbon group having 1 to 4 carbon atoms; and X and Z are each a halogen atom and may be the same or different from each other.

主权项

1. A process for producing a cationic hydroxypropyl cellulose, comprising:
i) reacting a low-crystalline powdery cellulose with at least one member selected from the group consisting of a cationizing agent represented by general formula (1) and a cationizing agent represented by general formula (2):wherein R1 to R3 are each independently a linear or branched hydrocarbon group having 1 to 4 carbon atoms; and X and Z are each a halogen atom and may be the same or different from each other,
in the presence of a catalyst and a liquid consisting of water and non-aqueous solvent, wherein said water is present in an amount of from 10 to 30% by mass on the basis of the low-crystalline powdery cellulose, and said non-aqueous solvent is present in an amount of 0 to 40% by mass on the basis of the low-crystalline powdery cellulose, to obtain a cationic cellulose; and then ii) reacting the thus obtained cationic cellulose with propylene oxide in the presence of a catalyst and a liquid consisting of water and non-aqueous solvent, wherein said water is present in an amount of from 10 to 30% by mass on the basis of the low-crystalline powdery cellulose, and said non-aqueous solvent is present in an amount of 0 to 40% by mass on the basis of the low-crystalline powdery cellulose.