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

A technology for molding components, polyamides, used in dyeing methods, optical components, chemical instruments and methods, etc., can solve problems such as less dye

Active Publication Date: 2006-11-01
艾曼斯(苏州)工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0163] Embodiment 1: produce polyamide PA1

[0164] 35.7 kg of the diamine MACM (3,3-diamino-4,4-dimethyldicyclohexylmethane) and 34.2 kg of dodecanedioic acid were added to a 130 L autoclave with a stirrer, while 30 kg of water were added. After heating to 280°C at a pressure of maximum 30 bar, preferably 20 bar, the batch is released to atmospheric pressure and degassed to the required torque. The polymer melt is discharged in strands, cooled in a water bath and pelletized. After drying, a relative viscosity of 1.73 in 0.5% m-cresol and a Tg of 153°C were obtained. Polyamides are amorphous and completely transparent.

[0165] Lenses in the form of discs of 70 x 2 mm were produced in polishing tools on an Arburg injection molding machine. The roll temperature was 260-340°C while the tool temperature was 45-140°C. These sheet lenses had a haze of 0.30 and a light transmission of 94% and were tinted in a functional bath.

Embodiment 2

[0166] Embodiment 2: produce polyamide PA2

[0167] 23.0kg diamine PACM (3,3-diamino-4,4-dimethyldicyclohexylmethane), 11.2kg diamine MACM (3,3-diamino-4,4-dimethyldicyclohexyl methane) and 35.7kg of dodecanedioic acid were added into a 130L autoclave with a stirrer, and 30.0kg of water was added simultaneously. After heating to 280°C at a pressure of maximum 30 bar, preferably 20 bar, the batch is released to atmospheric pressure and degassed to the required torque. The polymer melt is discharged in strands, cooled in a water bath and pelletized. After drying, a relative viscosity of 1.85 in 0.5% m-cresol, a Tg of 144°C and a melting point of 237°C were obtained. The polyamide is microcrystalline and completely transparent.

Embodiment 3

[0168] Embodiment 3: produce polyamide PA3

[0169] Add 30.0kg of diamine MACM (3,3-diamino-4,4-dimethyldicyclohexylmethane), 20.7kg of isophthalic acid and 26.0kg of glyceryl laurate lactam into a 130L autoclave with agitator In, add the water of 23.0kg simultaneously. After heating to 280°C and at a pressure of maximum 30 bar, preferably 20 bar, the batch is released to atmospheric pressure and degassed to the required torque. The polymer melt is discharged in strands, cooled in a water bath and pelletized. After drying, a relative viscosity of 1.55 in 0.5% m-cresol and a Tg of 160°C were obtained. The polyamide is amorphous and completely transparent.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): D06P1/90B32B27/34C08J3/20C08J5/18C08L77/00G02B1/10
CPCC08L77/00D06P1/65118D06P1/65131D06P1/90
Inventor 赫尔穆特·图伦弗里德里希·泽韦林·比马塞尔·格伦德
Owner 艾曼斯(苏州)工程塑料有限公司
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