Methods for producing polyisoprene latex dispersions
US-2023220124-A1 · Jul 13, 2023 · US
Rubber particle fractionation method, transport method, and storage method
US9777077B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9777077-B2 |
| Application number | US-201415106560-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 16, 2014 |
| Priority date | Jan 16, 2014 |
| Publication date | Oct 3, 2017 |
| Grant date | Oct 3, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
The present invention provides an effective method for fractionating rubber particles in natural rubber latex by particle size, and effective methods for transporting or preserving rubber particles. The present invention relates to a method for fractionating rubber particles in natural rubber latex by particle size, the method including centrifuging natural rubber latex in at least four stages at forces of 800 to 3,000×g, 6,500 to 10,000×g, 17,000 to 22,000×g, and 40,000 to 60,000×g to fractionate rubber particles. The present invention also relates to methods for transporting or preserving rubber particles, the methods including the steps of adding a buffer solution and an antioxidant to natural rubber latex or rubber particles fractionated from natural rubber latex; and freezing a mixture prepared in the above step.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for fractionating rubber particles in natural rubber latex by particle size, the method comprising adding a buffer solution to natural rubber latex and centrifuging the natural rubber latex in at least four stages at forces of 800 to 3,000×g, 6,500 to 10,000×g, 17,000 to 22,000×g, and 40,000 to 60,000×g to fractionate rubber particles, wherein the buffer solution is added to the natural rubber latex in an amount equal to or less than an amount of the natural rubber latex. 2. The method for fractionating rubber particles according to claim 1 , wherein the buffer solution is added to the natural rubber latex in an amount equal to or less than one-half of an amount of the natural rubber latex. 3. The method for fractionating rubber particles according to claim 1 , wherein the natural rubber latex is centrifuged in five stages at forces of 800 to 1,600×g, 1,800 to 3,000×g, 6,500 to 10,000×g, 17,000 to 22,000×g, and 40,000 to 60,000×g to fractionate rubber particles.
Assignees
Inventors
Classifications
Latex · CPC title
- C08C1/10Primary
by centrifugation · CPC title
Latex · CPC title
from solid polymers · CPC title
Preservation of rubber latex · CPC title
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- What does patent US9777077B2 cover?
- The present invention provides an effective method for fractionating rubber particles in natural rubber latex by particle size, and effective methods for transporting or preserving rubber particles. The present invention relates to a method for fractionating rubber particles in natural rubber latex by particle size, the method including centrifuging natural rubber latex in at least four stages …
- Who is the assignee on this patent?
- Sumitomo Rubber Ind, Univ Tohoku
- What technology area does this patent fall under?
- Primary CPC classification C08C1/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 03 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).