Pulverized product of carboxymethylated pulp and additive containing said pulverized product
US-2021079173-A1 · Mar 18, 2021 · US
Dispersion composition containing carboxymethyl cellulose
US12031016B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12031016-B2 |
| Application number | US-201917056291-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 17, 2019 |
| Priority date | May 18, 2018 |
| Publication date | Jul 9, 2024 |
| Grant date | Jul 9, 2024 |
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Abstract
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This dispersion composition contains a water-based medium and a carboxymethyl cellulose having a carboxymethyl substitution degree of 0.20 or more and a cellulose-I crystallinity index of 50% or more, a water-based medium is easily dispersed even by low mixing power, and has a high viscosity.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a dispersion composition, comprising step 1 of preparing a mixture comprising a carboxymethyl cellulose having a degree of carboxymethyl substitution of 0.20 or more and having a degree of crystallization of cellulose type I of 50% or more, and a water-based medium, and step 2 of subjecting the mixture obtained in step 1 to stirring at a rotational speed of 8000 to 15000 rpm for 1 minute or more, thereby obtaining a dispersion composition, wherein the carboxymethyl cellulose in the dispersion composition has a median diameter of 10.0 to 150.0 μm; and wherein the dispersion composition has a viscosity (6 rpm, 25° C.) of 1000 mPa·s to 30000 mPa·s at a solid content of the carboxymethyl cellulose of 1% (w/v). 2. The production method according to claim 1 , wherein a median diameter D 50A of the carboxymethyl cellulose before the stirring in step 2 and a median diameter D 50B of the carboxymethyl cellulose after the stirring in step 2 satisfy the following expression: 90≤ D 50B /D 50A ×100≤110. 3. The production method according to claim 1 , wherein the dispersion composition has a viscosity (60 rpm, 25° C.) of 100 mPa·s to 10000 mPa·s at a solid content of the carboxymethyl cellulose of 1% (w/v). 4. The production method according to claim 1 , wherein the step 1 comprises: adding a mercerizing agent to a cellulose in a solvent containing mainly water to prepare a mercerized cellulose, and adding a carboxymethylating agent to the mercerized cellulose in a mixed solvent of water and an organic solvent to prepare the carboxymethyl cellulose.
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Classifications
Ethers thereof · CPC title
Aqueous solutions or dispersions · CPC title
from polymer solutions · CPC title
Preparations for dry skin · CPC title
Thickener, Thickening system · CPC title
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- What does patent US12031016B2 cover?
- This dispersion composition contains a water-based medium and a carboxymethyl cellulose having a carboxymethyl substitution degree of 0.20 or more and a cellulose-I crystallinity index of 50% or more, a water-based medium is easily dispersed even by low mixing power, and has a high viscosity.
- Who is the assignee on this patent?
- Jujo Paper Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification A23L29/262. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Jul 09 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).