Cellulose acetate powder and method of producing cellulose acetate powder
US-2018037670-A1 · Feb 8, 2018 · US
Cellulose acetate and molded article
US11773239B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11773239-B2 |
| Application number | US-201816480618-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 17, 2018 |
| Priority date | Jan 25, 2017 |
| Publication date | Oct 3, 2023 |
| Grant date | Oct 3, 2023 |
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Abstract
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The purpose of the present invention is to provide a cellulose acetate excellent in transparency, and a molded article of the cellulose acetate.In the cellulose acetate, an acetylation degree is 52% or more and 59% or less, and a content of low-molecular-weight components having a molecular weight of not more than ¼ of a peak top molecular weight in a molecular weight distribution measured by gel permeation chromatography of cellulose acetate is 12% or less.
First claim
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The invention claimed is: 1. Cellulose acetate having an acetylation degree ranging from 52% to 59%, and containing 12% or less of low-molecular-weight components, wherein the low-molecular-weight components are components having a molecular weight of not more than ¼ of a peak top molecular weight in a molecular weight distribution measured by gel permeation chromatography of cellulose acetate, Mw/Mn is from 2.15 to 2.97, where Mw is a weight average molecular weight of the cellulose acetate and Mn is a number average molecular weight of the cellulose acetate, and the weight average molecular weight of the cellulose acetate is from 50,000 to 500,000. 2. The cellulose acetate according to claim 1 , wherein the cellulose acetate has a viscosity at 6% ranging from 30 mPa·s to 200 mPa·s. 3. The cellulose acetate according to claim 1 or 2 , wherein a ratio of a molar content of glucose to a sum of molar contents of glucose, xylose and mannose is 97% or more in sugar composition analysis. 4. The cellulose acetate according to claim 3 , wherein the ratio of the molar content of glucose to the sum of molar contents of glucose, xylose and mannose is 97.5% or more in the sugar composition analysis. 5. A molded article comprising the cellulose acetate according to claim 1 or 2 .
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- What does patent US11773239B2 cover?
- The purpose of the present invention is to provide a cellulose acetate excellent in transparency, and a molded article of the cellulose acetate.In the cellulose acetate, an acetylation degree is 52% or more and 59% or less, and a content of low-molecular-weight components having a molecular weight of not more than ¼ of a peak top molecular weight in a molecular weight distribution measured by g…
- Who is the assignee on this patent?
- Daicel Corp
- What technology area does this patent fall under?
- Primary CPC classification C08L1/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 03 2023 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).