Method for modifying surface properties of shaped articles of vi

Details Method for modifying surface properties of shaped articles of vi Method for modifying surface properties of shaped articles of vi

1980-05-13

1982-02-16

Derrington, James H.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

264 22, 264 83, 264 85, C08F 246

Patent

active

043158080

ABSTRACT:
The invention provides a novel method for preventing bleeding of a plasticizer or other additive ingredients contained in a shaped article of a vinyl chloride-based resin composition on to the surface of the article by the treatment with low temperature plasma. Different from conventional procedures for the plasma treatment, much improved reliability and reproducibility as well as effectiveness are obtained by subjecting the article to intermittent exposure to the plasma atmosphere instead of continuous exposure. In the inventive method, the overall treatment time is an alternate sequence of exposure times, each being of the length of 0.001 second to 1000 seconds, and repose times, each being also of the length of 0.001 second to 1000 seconds. The gas for the plasma atmosphere is desirably an inorganic gas selected from the gases other than oxygenic gases, halogen containing gases and sulfur containing gases.

REFERENCES:
patent: 3846521 (1974-11-01), Osterholtz
patent: 4046843 (1977-09-01), Sano et al.

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