Indanthrone Blue

Practical methods for synthesis and elucidation of the optimum physical forms were developed at Du Pont (13). The violets fill the void in the color gamut when the inorganics are inadequate. The quinacridones may be used in most resins except polymers such as nylon-6,6, polystyrene, and ABS. They are stable up to 275°C and show excellent weatherabiUty. One use is to shade phthalocyanines to match Indanthrone Blue. In carpeting, the quinacridones are recommended for polypropylene, acrylonitrile, polyester, and nylon-6 filaments. Predispersions in plastici2ers ate used in thermoset polyesters, urethanes, and epoxy resins (14). 

Some anthraquinone dyes are employed as organic pigments (see Pigments, organic). Examples appear in Figure 1. Indanthrone blue (6) is an important automotive paint pigment as is Cl Pigment Red 177 (7), a bisanthraquinonyl. 

Fig. 1. Anthraquinone dyes used as organic pigments (4) = dibromoan than throne [4378-61-4] (Cl Pigment Red 168 Cl Vat Orange 3 Cl 5930G) (5) = an anthrapyrimidine [4216-01 -7] (Cl Pigment YeUow 108 Cl Vat YeUow 20 Cl 68420)-, (6) = indanthrone blue [81-77-6] (Cl Pigment Blue 60 Cl Vat Blue 4 ...

Indanthrones. Indanthrone blue (Cl Vat Blue 4) [81-77-6] (6) (Cl 69800) is the first invented anthraquinone vat dye, and has been extensively used as the most important vat dye for many decades because of its bright color as well as excellent affinity and fastness. These advantages are considered to be due to the stable stmcture attained by the intramolecular hydrogen bonding (145). 

A number of vat dyes developed originally for textile applications are suitable, after conversion into an appropriate pigmentary physical form, for use in many paint and plastics applications. Examples of these so-called vat pigments include the anthraquinones, Indanthrone Blue (215, C. I. Pigment Blue 60) and Flavanthrone Yellow (216, C. I. Pigment... 

Apart from some nonclassified pigments such as Indanthrone Blue (P.131.60), the anthraquinone pigments, which are structurally or synthetically derived from the anthraquinone molecule, can be divided into the following four groups of polycyclic pigments. 

This cobalt phthalocyanine blue pigment is a recent product on the market. Its col-oristic properties are comparable with those of Indanthrone Blue, P.B.60. It affords rather dull reddish blue shades which are noticeably redder and duller than a-copper phthalocyanine blue. 

Another superior vat color is indanthrone blue. Pigment Blue 22 (XIX) (Scheme VII). In certain uses it is even more weatherfast than copper phthalocyanine (34). It is used to redden phthalocyanines, but, again, high cost limits its market. 

Blue 6B. See Direct blue 1 Blue anthraquinone pigment. See Indanthrone Blue base. See Dianisidine Bluebonnet extract Blue bottle extract. See Cornflower (Centaurea cyanus) extract Blue chamomile flower oil. See Chamomile (Matricaria chamomilla) flower oil Blue chamomile oil. See Matricaria (Chamomilla recutita) oil... 

Dihydro-5,9,14,18-anthrazinetetrone Food blue 4 Indanthrene Indanthrene blue Indanthrene blue FF Indanthrone blue ... 

Indanthrone blue. See Indanthrene 1,2,3-1 ndantrione, monohydrate. SeeNinhydrin Indanyl methyl ether lndan-1-yl methyl ether. See Methoxyindane Inden. Seeindene Indene... 

Indanthrone blue n. A member of a group of vat dye pigments. Relative to phthalocya-nine blue, it is considerably redder in hue and superior in bronze resistance lightfastness is excellent. It shows no tendency toward crystal growth in conventional paint thinners or solvents. 

Indanthron Blue - FPEG. AZPEG Reddish blue 9. 18... 

Of importance are indanthrone blue pigment blue (P.B.) 60, alpha-stabilized and beta-phthalocyanine blues P.B. 15 1,15 2 and 15 3 and the halogenated phthalocyanin green pigments (P.G.) P.G. 7 and P.G. 36. These pigments are all high heat resistance. 

Phthalocyanine blues have excellent fastness and resisttuice properties. They are used in combination with titanium dioxide to produce durable strong or light blues. They are also used in blue metallic paints. Indanthrone blue, which has a red undertone is also used in automotive finishing. 

Other blues sometimes used include indanthrone blue, which has a reddish cast and high resistance and molybdate blue, which produces a very brilliant blue. 

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