Method for the production of high internal phase emulsion foams
US-2015353699-A1 · Dec 10, 2015 · US
Method for producing porous structures from synthetic polymers
US8999211B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8999211-B2 |
| Application number | US-86704009-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 11, 2009 |
| Priority date | Feb 11, 2008 |
| Publication date | Apr 7, 2015 |
| Grant date | Apr 7, 2015 |
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Abstract
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A process for producing porous structures from polyamide by dissolving the polyamide in an ionic liquid and precipitating or coagulating the dissolved polyamide by contacting the solution with a liquid precipitant medium. Fibers are produced from the dissolved polyamide in a wet-spinning process by precipitation in protic solvents, in particular water, a C1-4-alkanol or mixtures thereof, and subsequent freeze-drying. Foils, films or coatings are produced by blade coating the dissolved polyamide onto a substrate surface, optionally spraying with protic solvent, in particular water, a C1-4-alcohol or mixtures thereof, dipping into a precipitation or coagulation bath, freeze-drying of the resulting foil, of the film or of the coated substrate. Molded parts are prepared by extracting the dissolved polyamide with protic solvents, preferably water, a C1-4-alcohol or mixtures thereof, wherein the dissolved polymer is transformed to a solid or wax-like state by cooling and extracted after subsequent molding.
First claim
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We claim: 1. A process for producing porous structures selected from porous fibers, foils, films, coatings or moldings, from polyamide comprising: dissolving the polyamide in an ionic liquid and precipitating or coagulating the dissolved polyamide by contacting the solution with a liquid precipitant medium, wherein the polyamide is polyhexamethylene adipamide, polyhexamethylene sebacamide, or polycaprolactam, wherein fibers are produced from the dissolved polyamide in a wet-sp…
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Chemistry & Metallurgy · mapped topic
- C08J9/28Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
Cross-Sectional Technologies · mapped topic
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- What does patent US8999211B2 cover?
- A process for producing porous structures from polyamide by dissolving the polyamide in an ionic liquid and precipitating or coagulating the dissolved polyamide by contacting the solution with a liquid precipitant medium. Fibers are produced from the dissolved polyamide in a wet-spinning process by precipitation in protic solvents, in particular water, a C1-4-alkanol or mixtures thereof, and su…
- Who is the assignee on this patent?
- Schwiegk Stefan, Wilms Axel, Lange Ronald Frans Maria, and 8 more
- What technology area does this patent fall under?
- Primary CPC classification C08J9/28. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 07 2015 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).