Sustainable chemistry from Lanxess at IILF

11 March 2010

At IILF, Lanxess will launch their sulphon based retanning agents Tanigan BN-IN, Tanigan HO-IN, and Tanigan 3LN-IN. All these syntans contain
low formaldehyde (HCHO): Tanigan BN-IN is a replacement tanning material for the tannage and retannage of very soft and full leather. Tanigan HO-IN, a versatile, lightfast and very good filling replacement syntan, is very suitable for the retannage of chrome leather and the tannage of chrome-free leather. It can be used as a sole tanning material or in combination. Tanigan 3LN-IN is a
lightfast replacement tanning material with excellent resistance to heat yellowing for the tannage of white leather and for the retannage of chrome leather.
Levotan LB reinforces Lanxess’ role as one of the leading suppliers of softening polymer tanning materials, which are increasingly replacing between 55-75% of the fatliquor offer because of their technical and ecological advantages. The new, versatile Levotan LB permits the cost-effective production of shoe and upholstery leather that are lighter, fluffier and softer than conventional fatliquored leather but nevertheless very durable.
Levotan C-IN is a dispersing, lightfast anionic polymer retanning material. In combination with replacement syntans and vegetable and resin tanning materials it gives soft and tight leather. Levotan C-IN has good dispersing action and can be combined with vegetable tanning materials. It is highly suitable for milled leather. Use of this product has been shown to considerably reduce the amount of wrinkling on different raw materials, thereby increasing the cutting yield.
New Tanigan VR-IN combines all the advantages of modern chemistry with those of a vegetable tanning material. Because of its extremely well-balanced property profile, Tanigan VR-IN can be used to replace some or even all of the vegetable tanning materials in the retannage, depending upon the raw material quality. Compared with certain vegetable tanning materials, this sulphone-based synthetic organic tanning material has outstanding heat resistance and lightfastness properties and a pale, neutral colour giving a brilliant dyeing.
The company have also added two soft acrylic base coat resins to their range of finishing products. The two waterborne
polyacrylate dispersions Primal SB-110 and Primal SB-155 are manufactured by The Dow Chemical Company and marketed by Lanxess.
The acrylic emulsion Primal SB-110 offers good embossing properties, fastness to heat
yellowing and cut-through resistance. It can be used to produce base coats for very soft leathers that are characterised by high wet and dry flex resistance, good print retention, good filling and covering properties.
Primal SB-155 is a soft acrylic base coat binder with optimised embossing properties. The product is particularly suitable for high-covering base coats for embossed leather types. Formulations based on Primal SB-155 have superb plate release and excellent print retention. Base coats formulated with this binder are particularly resistant to cut-through when embossed at high temperatures and pressures, especially on low grade crust leathers. This makes Primal SB-155 an ideal choice for formulating base coats for corrected and full grain crusts, for example upholstery leather.
All leather articles shown by Lanxess at the IILF booth are coloured with Euderm pigments and Levaderm dye solutions that are free from heavy metal, NMP and casein. Baykanol Licker which is free from APEO (alkylphenol ethoxylates) was used for fatliquoring. Visit the Lanxess stand for more info.



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