High-performance electret and air filter
US4626263A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1985 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Apr 23, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/39
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a high-performance electret comprising 60 to 99% by weight of a non-polar polymer, 0.5 to 39.5% by weight of a polar polymer and 0.5 to 20% by weight of at least one component selected from the group consisting of (A) a non-polar polymer modified with an unsaturated carboxylic acid or a derivative thereof, (B) a non-polar polymer modified with an unsaturated epoxy monomer and (C) a non-polar polymer modified with a silane monomer having an olefinically unsaturated bond. In this electret, a high charge density can be maintained stably over a long period, and this electret can be easily formed into a film. An air filter prepared from this electret is very excellent in the dust collecting efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.