Process for making a non-polar polymeric material dyeable with an acid dye
AssigneeShell Oil Company
InventorsLeopold Cop, Jan Jordaan, Henry P. Schreiber, Michael R. Wertheimer
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Abstract
Process for treating at least one surface of a non-polar polymeric material to improve the receptivity of that surface to coloration with an acid dye, which comprises treating said surface of the material with a low temperature microwave plasma from a chemical compound which is capable of creating receptor sites for acid dye on said surface.
Claims20
A process for treating at least one surface of a non-polar polymeric material to improve the receptivity of that surface to coloration with an acid dye, which comprises treating said surface of the material with a low temperature microwave plasma from a chemical compound which is capable of creating receptor sites for acid dye on said surface.
A process for treating at least one surface of a non-polar polymeric material to improve the receptivity of that surface to an acid dye comprising:
- pre-etching the surface of a non-polar polymeric material;
- exposing said pre-etched material to a low temperature microwave plasma from a chemical monomer selected from the group consisting of hexamethylene diamine, allyamine, formamide, butylamine, acrylamine, ammonia, hydrazine, 1,3-diaminopropane, pyrrolidine, heptamine, acrylic acid, toluidine, acetonitrile, vinyl pyridine and acrylamide at between 0.1 torr pressure and 0.4 torr pressure, using about 50 to about 600 watts for about 10 to about 300 seconds;
- immersing the treated material in at least one acid dye bath with said bath heated to a temperature in the range of about 48.degree. C. to about 52.degree. C. for a period of time ranging between 10 and 800 seconds.
Dependencies are inferred from the claim text.