Method of fluorinating the surface layer of bodies molded...

Details Method of fluorinating the surface layer of bodies molded... Method of fluorinating the surface layer of bodies molded...

C - Chemistry, Metallurgy

08

J

18/1182

C08J 7/12 (2006.01)

Patent

CA 1212809

Abstract of the Disclosure Method for the fluorination of a surface layer of articles molded from plastic, vulcanized rubber or other such macromolecular substances by the exposure of at least a part of the article's surface to a fluorine-yielding liquid in a controllable reaction, the liquid consisting of a solvent or solvent mixture containing dissolved elemental fluorine. Suitable solvents are especially halogen hydrocarbons in accordance with DIN 8962, which are liquid within a tempera- ture range from -30°C to +10°C, but also water and solvents having perfluoroalkyl groups. The liquid, in which a fluorine concentration between 0.5 x 10-3 and 1 x 10-2 mol/l is established by the introduction of fluorine diluted with inert gas, is used to treat the articles for about 20 seconds to 30 minutes; the fluorine can be activated if desired. The liquid can additionally contain sulfur dioxide, oxygen, carbon monoxide, chlorine, bromine, or mixtures thereof.

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