Radiographic intensifying screen with antistat

Details Radiographic intensifying screen with antistat Radiographic intensifying screen with antistat

1997-06-09

2000-02-22

Thibodeau, Paul

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

428330, 428446, 428447, 428448, 428500, 2504831, 2504832, G01J 158, B32B 118

Patent

active

060278102

ABSTRACT:
The performance of phosphor screens can be improved by adding an antistatic agent into the protective topcoat of the radiographic screen when the antistatic agent preferably comprises a fluorocarbon or silicone antistatic agent. These antistatic agents are particularly useful where the screen is made by coating phosphor dispersion/mixture onto a substrate while the dispersion/mixture contains less than 5% by weight of polymerizable components with a molecular weight less than 300, preferably with less than 5% by weight of polymerizable components having molecular weights less than 500, and a topcoat contains the antistatic agent. Formation of the antistatic topcoat is preferably formed by inclusion of the antistatic agent into the polymerizable composition and allowing the antistatic agent to migrate to the surface of the composition during polymerization to form a layer consisting essentially of the antistatic agent. The polymerizable composition should be photopolymerizable, and other components within the coating to be photohardened which have molecular weights below 300 or 500 should likewise be kept to less than 5% by weight of the composition.

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