HYDROXYPROPYL METHYLCELLULOSE ACETATE SUCCINATE POWDER, AND METHOD OF PRODUCING THE SAME
Number of patents in Portfolio can not be more than 2000
United States of America
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N/A
Issued Date -
Jan 30, 2025
app pub date -
Jul 25, 2024
filing date -
Jul 25, 2024
priority date (Note) -
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Abstract
Provided is a method of producing hydroxypropyl methylcellulose acetate succinate powder capable of inhibiting aggregation of particles of the precipitated esterified cellulose ether and reducing produced amount of fine powder to thereby obtain the esterified cellulose ether in high yield. The method of producing hydroxypropyl methylcellulose acetate succinate powder comprises an esterification reaction step, a precipitation step, a washing/recovering step and a drying step, wherein the precipitation step is a step of introducing the reaction solution, obtained in the esterification reaction step, and water into a mixer provided with a rotatable rotor having blades and a perforated plate arranged to surround the rotor in a direction perpendicular to a radial direction of the rotor to allow a suspension, containing precipitated hydroxypropyl methylcellulose acetate succinate particles, to pass through the perforated plate to be discharged therethrough.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
SHIN-ETSU CHEMICAL CO LTD | 4-1 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1000005 ?1000005 |
International Classification(s)

- 2024 Application Filing Year
- C08B Class
- 95 Applications Filed
- 8 Patents Issued To-Date
- 8.43 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
HOSHINO, Tsuyoshi | Tokyo, JP | 16 | 76 |
# of filed Patents : 16 Total Citations : 76 | |||
KITAGUCHI, Taishi | Joetsu-shi, JP | 13 | 4 |
# of filed Patents : 13 Total Citations : 4 | |||
KITAMURA, Akira | Joetsu-shi, JP | 54 | 156 |
# of filed Patents : 54 Total Citations : 156 | |||
KUROTANI, Shinichi | Tokyo, JP | 11 | 27 |
# of filed Patents : 11 Total Citations : 27 |
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- 0 Citation Count
- C08B Class
- 0 % this patent is cited more than
- < 1 Age
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