Low-substituted hydroxypropyl cellulose and process for producing same
OwnerSakae Obara, Hiroshi Umezawa +2inventors
InventorsSakae Obara, Hiroshi Umezawa, Naosuke Maruyama, Fumie Tanno
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Abstract
The present invention provides a low-substituted hydroxypropyl cellulose having a loose bulk density of not less than 0.40 g/mL and a tap bulk density of not less than 0.60 g/mL and a process for producing the same.
Claims6
A low-substituted hydroxypropyl cellulose having a loose bulk density of not less than 0.40 g/mL and a tap bulk density of not less than 0.60 g/mL.
A process for producing a low-substituted hydroxypropyl cellulose which comprises the steps of dipping pulp in an alkaline solution to prepare alkali cellulose, reacting the alkali cellulose with propylene oxide, dissolving the resulting product partially in water or an alkaline solvent, precipitating the product by neutralization with an acid, and washing, drying and grinding the precipitated product, wherein the product is completely dissolved prior to the neutralization with an acid.
Dependencies are inferred from the claim text.