Hydrophilic block copolymers and membranes prepared therefrom (i)
US-2015376340-A1 · Dec 31, 2015 · US
Aromatic polyethersulfone microparticles having narrow particle diameter distribution index
US9410004B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9410004-B2 |
| Application number | US-201313962653-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 8, 2013 |
| Priority date | May 21, 2008 |
| Publication date | Aug 9, 2016 |
| Grant date | Aug 9, 2016 |
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- Title
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Abstract
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A fine polymer particle production method includes producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, and bringing it into contact with a poor solvent for the polymer A to precipitate the polymer A. This method serves for easy synthesis of fine polymer particles with a narrow particle size distribution and the method can be effectively applied to production of highly heat-resistant polymers that have been difficult to produce with the conventional methods.
First claim
Opening claim text (preview).
The invention claimed is: 1. Aromatic polyethersulfone particles with a number average particle diameter of 0.1 to 50 μm and a particle diameter distribution index of 1.0 to 1.5, wherein the weight average molecular weight of the aromatic polyethersulfone in the particles is in the range of 10,000 to 500,000.
Assignees
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Classifications
Polysulfones; Polyethersulfones · CPC title
Polyamide-imides · CPC title
Homopolymers or copolymers of N-vinyl-pyrrolidones · CPC title
- C08G75/23Primary
Polyethersulfones · CPC title
Particulate matter [e.g., sphere, flake, etc.] · CPC title
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- What does patent US9410004B2 cover?
- A fine polymer particle production method includes producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, and bringing it into contact with a poor solvent for the polymer A to precipitat…
- Who is the assignee on this patent?
- Toray Industries
- What technology area does this patent fall under?
- Primary CPC classification C08G75/23. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 09 2016 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).