Method for modifying surface properties in polyvinyl chloride shaped articles
US4310564A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1980 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Nov 5, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The undesirable phenomenon of bleeding of, for example, a plasticizer contained in a shaped article of a plasticized polyvinyl chloride resin on the surface of the article in a long-run use is effectively prevented by the inventive method and the effectiveness of the method is durable over a long period of time even when the article is used in an outdoor environment or under irradiation with ultraviolet light. The method of the invention comprises the first step of exposing the surface of the article to an atmosphere of low temperature plasma of an inorganic gas and then the second step of contacting the thus plasma-treated surface with a halogen or hydrogen halide, preferably, in gaseous state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.