Cellulose acetate and method for producing cellulose acetate
US-2021171663-A1 · Jun 10, 2021 · US
Cellulose acetate, cellulose acetate fiber, cellulose acetate composition, method for producing cellulose acetate, and method for producing cellulose acetate composition
US11525014B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11525014-B2 |
| Application number | US-201917056468-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 12, 2019 |
| Priority date | Jun 12, 2018 |
| Publication date | Dec 13, 2022 |
| Grant date | Dec 13, 2022 |
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- Title
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Abstract
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An object of the present invention is to provide cellulose acetate that has excellent compatibility with a resin, can reinforce a resin, and has excellent thermal stability. An embodiment of the present invention is cellulose acetate having a cellulose triacetate I crystal structure, wherein a temperature at which a weight loss relative to weight at 100° C. reaches 5% is 200° C. or higher when the cellulose acetate is heated at a heating rate of 10° C./min under a nitrogen atmosphere.
First claim
Opening claim text (preview).
The invention claimed is: 1. Cellulose acetate having a cellulose triacetate I crystal structure, wherein a temperature at which a weight loss of cellulose acetate relative to weight at 100° C. reaches 5% is 200° C. or higher when the cellulose acetate is heated at a heating rate of 10° C./min under a nitrogen atmosphere. 2. The cellulose acetate according to claim 1 , wherein a temperature at which the weight loss reaches 5% is 220° C. or higher. 3. The cellulose acetate according to claim 2 , wherein a combined sulfuric acid content is 20 ppm or greater and 500 ppm or less. 4. A cellulose acetate fiber comprising the cellulose acetate described in claim 2 . 5. The cellulose acetate according to claim 1 , wherein a temperature at which the weight loss reaches 5% is 250° C. or higher. 6. The cellulose acetate according to claim 5 , wherein a combined sulfuric acid content is 20 ppm or greater and 500 ppm or less. 7. A cellulose acetate fiber comprising the cellulose acetate described in claim 3 . 8. The cellulose acetate according to claim 1 , wherein a combined sulfuric acid content is 20 ppm or greater and 500 ppm or less. 9. A cellulose acetate fiber comprising the cellulose acetate described in claim 1 . 10. A cellulose acetate composition comprising the cellulose acetate fiber described in claim 9 and a resin. 11. A method for producing cellulose acetate composition, the method comprising melt-kneading a resin in a presence of the cellulose acetate fiber described in claim 9 .
Assignees
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Classifications
Rendering cellulose suitable for esterification {(esterification per se, C08B3/00, C08B5/00, C08B7/00 or C08B9/00)} · CPC title
from organic cellulose esters or ethers, e.g. cellulose acetate · CPC title
Compositions of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds · CPC title
- C08L1/12Primary
Cellulose acetate · CPC title
Macromolecular compounds derived from lignin, e.g. tannins, humic acids · CPC title
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- What does patent US11525014B2 cover?
- An object of the present invention is to provide cellulose acetate that has excellent compatibility with a resin, can reinforce a resin, and has excellent thermal stability. An embodiment of the present invention is cellulose acetate having a cellulose triacetate I crystal structure, wherein a temperature at which a weight loss relative to weight at 100° C. reaches 5% is 200° C. or higher when …
- Who is the assignee on this patent?
- Univ Hokkaido Nat Univ Corp, Jujo Paper Co Ltd, 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 Dec 13 2022 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).