Process for the fluorination of a surface layer of formed bodies

Details Process for the fluorination of a surface layer of formed bodies Process for the fluorination of a surface layer of formed bodies

1983-12-07

1985-08-20

Lipman, Bernard

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

5253316, 5253331, 5253341, 525344, 525356, 525358, 525418, 525419, 525420, 525435, C08F 822

Patent

active

045362661

ABSTRACT:
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 temperature range from -30.degree. C. to +10.degree. C., but also water and solvents having perfluoroalkyl groups. The liquid, in which a fluorine concentration between 0.5.times.10.sup.-3 and 1.times.10.sup.-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.

REFERENCES:
patent: 3598708 (1971-08-01), Jackson, Jr.
patent: 4142032 (1979-02-01), D'Angelo
patent: 4296151 (1981-10-01), Boultinghouse

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