Low-substituted cellulose ether powder and production...

Details Low-substituted cellulose ether powder and production... Low-substituted cellulose ether powder and production...

2005-02-01

2005-02-01

Richter, Johann (Department: 1623)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

C536S085000, C536S086000, C536S089000, C536S095000, C536S096000, C536S099000, C536S100000, C536S124000

Reexamination Certificate

active

06849729

ABSTRACT:
Provided is a cellulose polymer having a water retention property, and good feeling upon use when applied to the skin and being suitably used as a carrier. More specifically, provided is a low-substituted cellulose ether powder comprising primary particles wherein at least 95% by weight of the primary particles have an aspect ratio of 1.0 to 1.5. Also provided is a production process of a low-substituted cellulose ether powder having a molar substitution degree of 0.05 to 1.0, comprising, during or after the addition of an acid to an alkali solution of low-substituted cellulose ether to neutralize the solution, triturating a resulting mixture; and spray-drying a resulting dispersion. Further provided is a production process of a low-substituted cellulose ether powder having a molar substitution degree of 0.05 to 1.0, comprising shear-triturating a low-substituted cellulose ether powder in water so as to swell-disperse the powder and spray-drying a resulting dispersion.

REFERENCES:
patent: 4091205 (1978-05-01), Onda et al.
patent: 4258179 (1981-03-01), Kawata et al.
patent: 1120427 (2001-01-01), None
patent: 616304 (1946-05-01), None
patent: 52143673 (1977-11-01), None
patent: 62310733 (1987-12-01), None
patent: 09110420 (1997-04-01), None
English Abstract of Japanese Patent Publication (JP-B) No. 62-61041/'87.
English Abstract of Japanese Patent Publication (JP-B) No. 6-49768/'94.

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