Aromatic polyethersulfone microparticles having narrow particle diameter distribution index
US-9410004-B2 · Aug 9, 2016 · US
Method of producing fine particles of non-vinyl thermoplastic polymer
US10239970B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10239970-B2 |
| Application number | US-201615197903-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 30, 2016 |
| Priority date | May 21, 2008 |
| Publication date | Mar 26, 2019 |
| Grant date | Mar 26, 2019 |
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Abstract
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Fine polymer particles made by a method include 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, wherein the solvents in the two phases resulting from the phase separation are substantially identical to each other, and contacting the emulsion with a poor solvent for the polymer A to precipitate the polymer A, wherein the particles have a glass transition point of 150° C. or more and 400° C. or less, an average particle diameter of 1 μm or more to 100 μm or less, and a particle diameter distribution index of the particles is 2 or less, wherein the polymer A is nonvinyl type polymer.
First claim
Opening claim text (preview).
The invention claimed is: 1. Fine polymer particles made by a method comprising: 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, wherein the solvents in the two phases resulting from the phase separation are substantially identical to each other; and contacting the emulsion with a poor solvent for the polymer A to precipitate the polymer A, wherein the particles have a glass transition point of 180° C. or more and 400° C. or less, an average particle diameter of 1 μm or more to 100 μm or less, and a particle diameter distribution index of the particles is 2 or less, wherein the polymer A is nonvinyl type thermoplastic polymer. 2. Fine polymer particles with an average particle diameter of 1 μm or more to 100 μm or less and a particle diameter distribution index of 2 or less formed of at least one selected from the group of amorphous non-totally aromatic polyamide, polyphenylene ether, polyetherimide, amorphous polyarylate and polyamide-imide. 3. The fine polymer particles according to claim 2 , obtained by a method of producing fine polymer particles comprising: 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 phase, wherein the solvents in the two phases resulting from the phase separation are substantially identical to each other; and contacting the emulsion with a poor solvent for the polymer A to precipitate the polymer A, wherein polymer A is at least one selected from the group of, amorphous non-totally aromatic polyamide, polyphenylene ether, polyetherimide, amorphous polyarylate and polyamide-imide.
Assignees
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Classifications
ABS [Acrylonitrile-Butadiene-Styrene] polymers · CPC title
Post-polymerisation treatment · CPC title
Polyimides containing oxygen in the form of ether bonds in the main chain · CPC title
Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title
with nitriles · CPC title
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- What does patent US10239970B2 cover?
- Fine polymer particles made by a method include 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, wherein the solvents in the two phases resulting from the phase separation are subs…
- Who is the assignee on this patent?
- Toray Industries
- What technology area does this patent fall under?
- Primary CPC classification C08F120/44. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 26 2019 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).