Process for tinting, dyeing or doping of moulded components made of transparent (co)polyamides in aqueous dye bath

Abstract

Function bath (A) for toning and / or coloring or doping molded parts comprises (wt.%): deionized water, carrier (0.10-6), surfactant / emulsifier (0.001-1), surface active substance-D (0.01-7, preferably 0.01-6), surface active-substance-E (0.01-3, preferably 0.01-2), pigments or dopants (0.01-0.90), buffer (0-3) and optionally a dispersing agent (0-4) of ethoxy fattyamine ester, aralkylpolyglycol ether or modified polyalcohol for anionic preparation. Function bath (A) for toning and / or coloring or doping molded parts obtained form transparent or translucent (co)polyamide comprises (wt.%): deionized water, carrier (0.10-6), surfactant / emulsifier (0.001-1), surface active substance-D (0.01-7, preferably 0.01-6), surface active-substance-E (0.01-3, preferably 0.01-2), pigments or dopants (0.01-0.90), buffer (0-3) and optionally a dispersing agent (0-4) of ethoxy fattyamine ester, aralkylpolyglycol ether or modified polyalcohol for anionic preparation; where the carrier is monohydroxyglycol, ethyleneglycolmonobutylether or diethyleneglycolmonobutylether, the active substance-D is glycol (preferably diethylene glycol or triethylene glycol), and the active substance (E) contains at least a polyalkyleneglycol (I) of formula (R 1>-{[-O-(CH 2) n] m}OR 2>). R 1>, R 2>H; n : 2-4; and m : 6-35. INDEPENDENT CLAIM is included for: (1) a use of the functional bath in a method for toning and / or coloring or doping molded parts with function additive of transparent or translucent co(polyamide) in water comprising providing immerse bath and / or (A) comprising pigments, doping agent, interference pigment, UV additives, photochromes or thermochrome additives, reinforcing additives for influencing the refraction index; heating the baths at 50-95[deg]C; pretreating the molded part in the bath; purifying the molded part, and removing the purified molded part; immersing (A) in dye or doping agent, color pigments, interfering pigments, UV additives, photo chrome, thermochrome additive or contrast reinforcing additives; removing the molded part from (A) and treating the molded part; and followed by cooling and drying the molded part of at least thermoplastic of transparent (co)polyamide; and (2) toned and / or colored or doped molded part.

Description

technical field [0001] The present invention relates to novel compositions of dyeing or functional baths and methods for coloring, dyeing or doping molded elements with functional additives in these aqueous impregnating or functional baths. The molded element essentially contains transparent or translucent (co)polyamide. The temperature of the immersion or functional bath is below the glass transition temperature (Tg) of the (co)polyamide. If the molded element is to be colored or dyed according to an embodiment of the present invention, the dyeing can be performed as a uniform dye or a gradient dye. [0002] The method according to the invention is particularly suitable for the production of high-value objects such as ophthalmic lenses, sun lenses for spectacles, magnifying glasses, various viewing glasses, polarizing films and display films, especially if varying color intensities (gradients) are to be produced. [0003] The generation of color gradients requires dyeing in...

AI Technical Summary

Problems solved by technology

If optimization is not carried out, too little dye is absorbed by the molded part due to insufficient wetting