Introduction Of Environment-Friendly Direct Dyes

< p > (1) two amino two styrene two sulfonic acid group < a href= "http://www.91se91.com/" > direct dye > /a >: this kind of dyestuff has bright color and moderate fastness, and direct fast orange GGL (C.I. direct orange 39) is an environmentally friendly dye with better performance.

The direct sun yellow 3BLL (C.I. direct yellow 106) is three azazole direct dye, and its fastness to sunlight is 6~7.

Direct green IRC (C.I. direct green 34) has high dye uptake, excellent color fastness, 6~7 degree fastness to sunlight and 3~4 fastness to washing.

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< p > (2) 4.4`- two amino two phenyl urea direct dyes: these dyes are non carcinogenic and have high fastness to sunlight.

There are many varieties, which are environment-friendly dyes.

Such as direct sun yellow RSC (C.I. direct yellow 50), direct fast red F3B (C.I. direct red 80), C.I. direct Brown 112, C.I. direct Brown 126, C.I. direct Brown 152.

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< p > (3) 4.4`- two amino benzoylaniline type direct dyes: this kind of dye has good fastness, is < a href= "http://www.91se91.com/" > environment-friendly dye < /a >.

For example, direct green N-B (C.I. direct green 89), direct yellow brown N-D3G (C.I. direct Brown 223), direct black N-BN (C.I. direct black 166).

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< p > (4) 4.4`- two amino benzene sulfonyl aniline type direct dyes: these dyes are synthesized from two amino compounds and have good dyeing properties and fastness.

It is widely used in dyeing cotton, linen, viscose fiber, silk and leather.

We have developed and screened products that can replace banned direct dyes, such as C.I. direct black 166 (direct black N-BN), C.I. acid black 210 (acid black NT), C.I. acid black 234, etc.

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< p > (5) two amino heterocyclic direct dyes: these dyes are direct dyes synthesized from two amino heterocyclic compounds, such as two benzo two oxazine dyes, which are brightly coloured, with high coloring strength and color fastness, and fastness to 7.

The representative varieties are C.I. direct Blue 106 (direct sunlight blue FF2GL), C.I. direct blue 108 (direct sunlight blue FFRL) and so on.

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< p > (6) the environmentally friendly direct dyes for polyester / Cotton (polyester / viscose) fabrics are polyester / cotton, polyester / viscose blended fabric and other fibers of the same nature. This requires direct dyes to have excellent high temperature stability, good lifting power and repeatability, good fastness and environmental protection performance.

The D blended dyestuff developed by Shanghai dyestuff company is an environment-friendly dyestuff that can achieve the above performance. At present, there are more than 25 kinds of dyes, such as C.I. direct yellow 86 (direct blending yellow D-R), C.I. direct yellow 106 (direct blending yellow D-3RLL), C.I.224 direct blending red red D-GLN, C.I. direct violet 66 (direct blending purple D-5BL), C.I. direct blue 70 (direct blending blue D-RGL), direct blending of brown brown pigment, direct black 166 (direct blending black pigment), etc.

Among them, some species are copper complexes, and free copper should be within the limit of ETAD (250mg/kg).

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< p > (7) the Kayaeelon C type dyes developed and screened by Japanese chemical pharmaceutical companies: C.I. direct yellow 161 (Yellow C 3RL), C.I. direct red 83 (Rubine C BL), direct blue 288, C direct green 59, and direct black 117.

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< p > Dystar has developed Sirius Plus series direct dyes, Ciba company has launched Cibafix ECO direct dyes, BASF has launched Diazol series direct dyes, Yorkshire company has launched Benganil series direct dyes and so on.

These dyes have similar functions, such as bright coloring, high lightfastness, environment-friendly dyes without heavy metals. They have excellent high temperature stability. They are suitable for dyeing of < a href= "http://www.91se91.com/" > polyester cotton blended /a < fabric one bath one step dyeing.

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