US 2006/0230553 A1Published application

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

OwnerHelmut Thullen, Friedrich Buehler +1inventors

InventorsHelmut Thullen, Friedrich Buehler, Marcel Grand

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Abstract

The present invention relates to a novel composition of dye baths or processing baths and a process for tinting, dyeing or doping of moulded components with functional additives in these aqueous dipping baths or processing baths. The moulded components contain transparent or translucent (co)polyamides. If the moulded components should be tinted or dyed according to an embodiment of the invention, the dyeing can be performed as homogeneous dyeing or as gradient dyeing. The process according to the present invention is particularly suitable for producing high-value objects like ophthalmic lenses, sun lenses for eyeglasses, magnifying glasses, all kinds of inspection glasses, polarization films and display films, particularly if changing depths of color (gradients) are desired. This generating of a dyeing gradient requires dyeing in a dipping process, whereby the desired depth of color is achieved by multiple times of dipping the surface areas of the moulded article in the dye bath.

Claims21

Dependent claims

A processing bath for tinting, dyeing and doping of moulded components made from transparent or translucent (co)polyamides, wherein

said functional bath consists of the following components, in wt-%:
A)
deionized water
B)
carrier
0.10-6.00,
C)
surfactant/emulsifier
0.001-1.00,
D)
surfactant D
0.01-7.00,
preferred
0.01-6.00,
E)
surfactant E
0.01-3.00,
preferred
0.01-2.00,
F)
dyestuffs or doping agents
0.01-0.90,
G)
buffer
0-3.00,
and if necessary,
H)
dispersion agents for
0-4.00,
dyestuffs or doping agents (F)
based on an anionic preparation of ethoxylated fatty amine esters, aralkyl polyglycolether and a modified polyalcohol,
wherein the amounts of the components (A) to (G) and, if necessary, (H) total 100 wt-%,
wherein said carrier (B) consists of at least one monohydroxy glycol selected from the group consisting of ethylene glycol monobutyl ether and diethylene glycol monobutyl ether,
wherein said surfactant (D) consists of at least one glycol selected from the group consisting of diethylene glycol and triethylene glycol, and
wherein said surfactant (E) consists of at least one polyalkene glycol according to the general formula (3):
R1—{[—O—(CH2)n]m} OR2
wherein R1 and R2 denote H with n is 2-4 and m is 6-35.

34 more elements

A method of use of a processing bath in a process for tinting, dyeing or doping of moulded components with functional additives made of transparent or translucent (co)polyamides in aqueous dipping baths or functional baths comprising the following steps of:

a) providing the dipping or functional bath comprising water (A), buffer (G), a carrier (B), surfactants/emulsifiers (C), surfactants (D), (E), and at least one compound in sufficient quantity for tinting, dyeing or doping selected from the group of dyestuffs or doping agents (F), or of dye pigments, interference pigments, UV additives, photochromic or thermochromic additives, additives selected from the group of additives enhancing contrast or additives affecting refraction index, and if necessary, dispersion agents (H) for dyestuffs or doting agents based on an anionic preparation of ethoxylated fatty amine esters, aralkyl polyglycol ether and a modified polyalcohol.
b) heating-up said dipping or functional bath to a temperature of between 50 and 95° C.,
c) pretreating the moulded component in a dipping bath comprising water (A), surfactants and/or emulsifiers (C) for cleaning said moulded component, heating-up said dipping bath to a temperature of between 50 and 95° C., and removing said tempered and cleaned moulded component from said pretreating dipping bath,
d) immersing at least a portion of said moulded component in said processing bath, retaining the moulded component in said functional bath for a period of time of 5 to 60 minutes to allow that a sufficient quantity of said dyestuffs or doping agents (F), or said dye pigments, said interference pigments, of a UV additive, a photochromic or thermochromic additive, or an additive selected from the group of additives enhancing contrast or additives affecting refraction index can diffuse into the moulded component, and
e) removing said moulded component from said processing bath, and subsequent treating said moulded component,
f) cooling-down said moulded component, and
g) drying said moulded component,
wherein the moulded article comprises at least one thermoplastic synthetic material selected from the group of transparent (co)polyamides.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/403,042Filed 12 Apr 2006
Priority: DE 10 2005 017 321.714 Apr 2005
Published: 19 Oct 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

C09B 67/0082
Preparations of disperse dyes or solvent dyes: in liquid form
C09B 67/0073
Preparations with anionic dyes or reactive dyes: preparations of acid or reactive dyes in liquid form
C09B
Organic dyes or closely-related compounds for producing dyes

Family

Application60/671,594Us provisional application · filed 14 Apr 2005
US 2006/0230553 A1This patent

From the US filing history. Foreign family members aren’t listed.

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