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Dekol SAD

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  • pg 1
									Technical Information              Dekol® SAD
January 2000




                                   Auxiliary with sequestering and dispersing properties for
                                   dyeing cotton and cotton blends with Procion® dyes by the
                                   eXcel Controlled Coloration process. Efficient nitrogen-
                                   free, non-foaming sequestering agent with excellent
                                   sequestering action against calcium, magnesium, and
                                   heavy metal ions.

                                   Stable at high temperatures and effective over a wide pH
                                   range.

                                   Vital dyebath component in fiber reactive dyeings,
                                   especially in eXceL Controlled Coloration.




Colorants and Finishing Products
Dekol® SAD

Nature              Nitrogen-free sequestering agent, anionic


Physical Form       Clear, colorless, free flowing liquid.

Storage             When stored correctly, in sealed containers, Dekol® SAD has a
                    shelf life of 12 months.


                    Properties

Miscibility:        Dekol® SAD is miscible with water in all proportions

pH                  ~ 4.5 (product as is)

Density             specific gravity ~1.08 (~ 9 lbs. per gallon)

Stability:          Dekol® SAD is stable to acids, alkalis and electrolytes in the
                    concentration normally used in dyeing liquors.

Compatibility:      Dekol® SAD is compatible with anionic and nonionic products.
                    With cationic auxiliaries preliminary laboratory tests are
                    recommended.



Action              Dekol® SAD
                    • sequesters alkaline earth and heavy metal ions from hard
                      water, fabric and/or salt.
                    • eliminates precipitation problems experienced in dyeing.
                    • is used in ALL eXceL Controlled Coloration processes.
                    • is used in the Select II process for polyester - cellulose

No de-metalizing:   Dekol® SAD has been found to have no de-metalizing effects
                    with metal containing reactive dyes.




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Dekol® SAD

              Application

Application   0.5 - 2.0 g/l in exhaust dyeing
amounts:      5 - 10 g/l in padding processes

              Where the levels of hard-water salts are particularly high, for
              example when raw cotton is dyed in hard water, the application
              rate should be increased by:

              0.1 g/l Dekol SAD for every 1.04°US hardness
                                               (~17.7 ppm CaCO3)


              Dekol® SAD
              • Eliminates calcium and magnesium precipitants or lime-
                soap deposits on textile goods and prevents build-up of
                insoluble scale on machinery.
              • Improves water absorbency and softness of fabrics
              • Improves winding properties of yarn
              • Enhances the brightness of dyeings
              • Improves level dyeing performance of reactive dyes
              • Improves reproducibility of yield
              • Prevents precipitation of dyestuff
              • Prevents shade changes caused by trace amounts of heavy
                metal ions
              • Reduces possibility of spots on dyed fabric

              All Reactive Dye systems need Dekol® SAD in the dyeing cycle
              to prevent problems with:

                    - shade reproducibility
                    - unlevelness
                    - fastness
                    - dye deposition




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Dekol® SAD

Sources of         There are 4 common sources of metal ions in the dye bath
calcium and        - cotton fabric
magnesium in       - water
the dye bath       - electrolyte
                   - peroxide stabilizer (may contain magnesium salts)

                   The use of Dekol® SAD to control of the metal ions is a vital
                   element in RIGHT-FIRST-TIME production.

Controlling              For Prescour         -      use Dekol® N-SN
calcium and              For Dyeing           -      use Dekol® SAD
magnesium                For washing-off      -      use Dekol® N-SN


Controlling        When fabric has been efficiently prepared using a well-
calcium and        balanced scour/bleach process and the scouring has been
magnesium in the   followed by hot rinsing, the fabric may still be contaminated
dyebath            with calcium and magnesium equivalent to an American water
                   hardness of approximately 700.

                   At Liquor Ratio 10:1, the dyebath could be contaminated with
                   as much as 70 ppm water hardness which is above the
                   maximum level tolerated by reactive dye systems.

                   Dekol® SAD is therefore, ALWAYS recommended in the
                   dyebath.

Controlling      The target specification for dyehouse water is:
calcium and
magnesium in the                      Maximum Recommended Tolerance
water supply     Total Hardness       50 ppm
                 Copper               0.05 ppm
                 Iron                 0.05 ppm
                 pH                   7.0 ± 0.5

                   50 ppm hardness should represent the maximum total hardness
                   where automated softening plants with automatic titration
                   facilities are available.




                                                                                   4
Dekol® SAD



Controlling      The quality of the electrolyte (common salt in particular) can
calcium and      have a significant influence on the hardness of the dyebath,
magnesium in the and therefore the performance of the reactive dye system.
electrolyte
                 Contamination of salt with high levels of calcium and
                 magnesium is a very common problem. 400 ppm calcium and
                 magnesium are a typical level of contamination in technical
                 grade common salt.

                    Expressed as water hardness (calcium carbonate) this is
                    approximately 1000 ppm. Using 80 g/l common salt will also
                    introduce 80 ppm American water hardness to the dyebath.

                    Glauber's salt is not usually contaminated with significant levels
                    of calcium and magnesium.


Impact on           Calcium and Magnesium ions in reactive dye baths influence:
reactive dye
systems                   - solubility
                          - substantivity
                          - migration properties
                          - level dyeing performance
                          - fixation efficiency (particularly reactive red dyes)
                          - wash-off performance
                          - wash and rub fastness

                    As a component in the dye bath, Dekol SAD eliminates the
                    causes of the above problems and leads to right fist time
                    production.




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Dekol® SAD

Safety
             When using this product, the information and advice given in our Safety Data
             Sheet should be observed. Due attention should also be given to the
             precautions necessary for handling chemicals.

             We know of no ill effects that could have resulted from using Dekol® SAD for
             the purpose for which it is intended and from processing it in accordance with
             current practice.

             According to the experience that we have gained over many years and other
             information at our disposal, Dekol® SAD does not exert any harmful effects on
             health, provided that it is used properly, due attention is given to the precautions
             necessary for handling chemicals, and the information and advice given in our
             Material Safety Data Sheet are observed.

             Important: While the information and data contained in this bulletin are
             presented in good faith and believed to be reliable, they do not constitute
             a part of our terms and conditions of sales unless specifically
             incorporated in our Order Acknowledgment. NOTHING HEREIN SHALL
             BE DEEMED TO CONSTITUTE A WARRANTY, EXPRESS OR IMPLIED,
             THAT SAID INFORMATION OR DATA ARE CORRECT OR THAT THE
             PRODUCTS DESCRIBED ARE MERCHANTABLE OR FIT FOR A
             PARTICULAR PURPOSE, OR THAT SAID INFORMATION, DATA OR
             PRODUCTS CAN BE USED WITHOUT INFRINGING PATENTS OF
             THIRD PARTIES. It is the responsibility of those to whom we supply our
             products to ensure that any proprietary rights and existing laws and
             legislation are observed.

             Note: Material Safety Data Sheet is available upon request.

BASF Corporation, 2000
Colorants and Textile / Leather Chemicals

BASF Canada Inc.                BASF Corporation              BASF Mexicana, S.A de C.V.
345 Carlingview Drive.          4330 Chesapeake Drive         Insurgentes Sur 975
Toronto ON                      Charlotte, NC 28266           Col. Cd. de los Deportes
M9W 6N9                         USA                           03710 México, D. F.
Canada                                                        México
(416) 675-3611                  (704) 392-4313                (5) 325 2709
                                800-545-4931

								
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