Process of manufacturing a microporous sheet material
US4237083A · kind A · utility
62Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Feb 13, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/17
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process of manufacturing a microporous sheet by forming a blend of a polyolefin, silica and a water insoluble plasticizer, forming a sheet from the blend, and contacting the sheet with water for a time sufficient to render the sheet microporous. The plasticizer, being essentially insoluble in water, is easily separated therefrom and recycled. The preferred plasticizers are dialkyl phthalates and dialkyl adipates having between about two and about eleven carbon atoms in the oxo-alcohol moiety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.