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

APP PUB NO 20250034284A1
SERIAL NO

18784053

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
SHIN-ETSU CHEMICAL CO LTD4-1 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1000005 ?1000005

International Classification(s)

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  • 2024 Application Filing Year
  • C08B Class
  • 95 Applications Filed
  • 8 Patents Issued To-Date
  • 8.43 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances202420250255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
HOSHINO, Tsuyoshi Tokyo, JP 16 76
KITAGUCHI, Taishi Joetsu-shi, JP 13 4
KITAMURA, Akira Joetsu-shi, JP 54 156
KUROTANI, Shinichi Tokyo, JP 11 27

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Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges17800102030405060708090100110120130140150160170180190

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