Surface treatment of a solid polymeric material with a reactive gas
US4467075A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1983 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Aug 5, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J7/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a batch process for the treatment of the surface of a solid polymeric material by a gas reactive therewith comprising the following steps: PA1 (a) providing a closed system comprising a chamber; PA1 (b) introducing the material into the chamber; PA1 (c) heating the chamber and the material to a selected temperature in the range of about 100.degree. F. to about 200.degree. F.; PA1 (d) evacuating the system; PA1 (e) introducing the reactive gas into the system in an amount (i) of up to about 10 percent in excess of the theoretical amount of gas required to react with the surface of the polymeric material to a desired depth and (ii) sufficient to provide a partial pressure in the system in the range of about 0.1 psia to about 3 psia; PA1 (f) introducing an inert gas into the system in an amount sufficient to provide a total pressure in the system or about one atmosphere; PA1 (g) maintaining the selected temperature for a period of time sufficient for the reaction to take place between the gas and the surface; PA1 (h) evacuating the system; PA1 (i) introducing air into the system to provide about atmospheric pressure; and PA1 (j) removing the material, PA2 the improvement comprising…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.