Method for the production of high internal phase emulsion foams
US-2015353699-A1 · Dec 10, 2015 · US
Polyolefin microporous membrane, method for producing same, and battery separator
US10507436B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10507436-B2 |
| Application number | US-201515539972-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 25, 2015 |
| Priority date | Dec 26, 2014 |
| Publication date | Dec 17, 2019 |
| Grant date | Dec 17, 2019 |
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Abstract
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A polyolefin microporous membrane is disclosed. The polyolefin microporous membrane includes a polyolefin resin, where the polyolefin resin contains at least 80 mass % polypropylene resin, and where the polyolefin microporous membrane has a maximum pore size of less than 30.0 nm and a mean flow pore size of less than 20.0 nm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polyolefin microporous membrane comprising a polyolefin resin, wherein the polyolefin resin contains at least 80 mass % polypropylene resin, and wherein the polyolefin microporous membrane has a maximum pore size of less than 30.0 nm and a mean pore size of less than 20.0 nm. 2. The polyolefin microporous membrane according to claim 1 , wherein the polyolefin resin contains at least 90 mass % polypropylene resin, and an impedance of the polyolefin microporous membrane is no greater than 15.0 Ω·cm 2 . 3. The polyolefin microporous membrane according to claim 1 , wherein the maximum pore size on a surface of the polyolefin microporous membrane is 300 nm or less. 4. The polyolefin microporous membrane according to claim 1 , wherein an average molecular weight of the polypropylene resin is between about 1×10 5 and about 1×10 8 . 5. The polyolefin microporous membrane according to claim 1 , wherein a porosity of the polyolefin microporous membrane is between about 20% and about 80%. 6. The polyolefin microporous membrane according to claim 1 , wherein, a membrane thickness of the polyolefin microporous membrane is 20 and an air permeation resistance of the polyolefin microporous membrane is 300 sec/100 cc or greater. 7. A battery separator comprising a polyolefin microporous membrane comprising a polyolefin resin, wherein the polyolefin resin contains at least 80 mass % polypropylene resin, wherein the polyolefin microporous membrane has a maximum pore size of less than 30.0 nm and a mean pore size of less than 20.0 nm. 8. The battery separator according to claim 7 , wherein the battery separator is a non-aqueous electrolyte rechargeable battery separator. 9. A rechargeable battery comprising a battery separator comprising a polyolefin microporous membrane comprising a polyolefin resin, wherein the polyolefin resin contains at least 80 mass % polypropylene resin, wherein the polyolefin microporous membrane has a maximum pore size of less than 30.0 nm and a mean pore size of less than 20.0 nm.
Assignees
Inventors
Classifications
- C08J9/28Primary
by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum · CPC title
Propene · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Electricity · mapped topic
- B01D71/26Primary
Polyalkenes · CPC title
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Frequently asked questions
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- What does patent US10507436B2 cover?
- A polyolefin microporous membrane is disclosed. The polyolefin microporous membrane includes a polyolefin resin, where the polyolefin resin contains at least 80 mass % polypropylene resin, and where the polyolefin microporous membrane has a maximum pore size of less than 30.0 nm and a mean flow pore size of less than 20.0 nm.
- Who is the assignee on this patent?
- Toray Industries
- 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 Dec 17 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).