Porous water-soluble nonionic cellulose ether having excellent solubility and method for producing the same

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United States of America Patent

PATENT NO 11851544
APP PUB NO 20200362132A1
SERIAL NO

16983465

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Abstract

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There are provided a porous water-soluble nonionic cellulose ether having an average pore size of 36 μm or smaller and an average particle size of from 30 to 300 μm; and a method for continuously producing said cellulose ether comprising the steps of: pulverizing a first water-soluble nonionic cellulose ether to obtain a first pulverized product, and sieving the pulverized product through a sieve having an opening of from 40 to 400 μm to obtain a first residue-on-sieve and a first sieve-passing fraction, wherein a portion or all of the first residue-on-sieve containing particles having particle sizes smaller than and greater than the opening of the sieve is re-pulverized together with a second water-soluble nonionic cellulose ether in the step of pulverizing to obtain a second pulverized product, which is pulverized to obtain the cellulose ether as a second sieve-passing fraction containing the re-pulverized particles.

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Patent Owner(s)

  • SHIN-ETSU CHEMICAL CO. LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Narita, Mitsuo Joetsu, JP 58 162

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