Method of dyeing thermoplastic resin article and colored plastic lens obtainable by that method
AssigneeHoya Corporation
InventorsKazuo Inoue, Misa Mishna, Masahiro Nakagawa
Life of this patent
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Abstract
The invention provides a method of effectively dyeing a thermoplastic resin plastic lens in any desired color tone and density as well as a colored plastic lens made by the method. The method involves dipping a thermoplastic resin plastic lens in a dyeing liquid containing one or more disperse dyes and one or more monocyclic monoterpenes.
Claims16
A method of dyeing a thermoplastic resin plastic lens, comprising providing a dyeing liquid comprising one or more disperse dyes and one or more monocyclic monoterpenes at a temperature of from about 70° C. to about 100° C., dipping the lens into the dyeing liquid and carrying out said dipping at said temperature for a period of time in the range of from about one minute up to about 2 hours.
A method of dyeing an article formed of a polycarbonate resin made from a starting material comprising bisphenol A, comprising providing a dyeing liquid comprising one or more disperse dyes and one or more monocyclic monoterpenes at a temperature of from about 70° C. to about 100° C., dipping the article into the dyeing liquid and carrying o said dipping at said temperature for a period of time in the range of from about one minute up t about 2 hours.
Dependencies are inferred from the claim text.