Processes for improved surface properties incorporating compressive heating of reactive gases
US6462142B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1999 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Nov 3, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J15/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and method are used to modify the surface chemistry of an article. The article to be surface treated has at least a surface region that includes at least one polymer. The method comprises the steps of placing one or more articles into a closed reaction chamber which is evacuated to a negative pressure. After evacuation, a treatment gas is rapidly injected into the reaction chamber, the treatment gas having an essentially predetermined composition comprising one or more components which are reactive with the articles within the reaction chamber. The treatment gas is allowed to react with the articles within the closed reaction chamber for a predetermined period of time. The treatment gas is then removed from within the reaction chamber and replaced with an inert gas at about atmospheric pressure. Finally, the treated articles are removed from the treatment chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.